Ecco il nuovo logo di Citiverse.it: il forum dei luoghi e città integrato con il Fediverso

@fediverso

Siamo quasi giunti alla fine del 2025 che per noi è stato un anno molto importante.

Mentre si consolidano le nostre tre istanze federate poliverso.org, feddit.it e poliversity.it possiamo finalmente spingere per lo sviluppo della quarta istanza creata: citiverse.it

Citiverse.it è un progetto che stiamo portando avanti con pochissime risorse, ossia qualche donazione e, soprattutto, l'autofinanziamento da parte dei due promotori, ossia il progetto poliverso.org (by @informapirata ) e l'ecosistema che si è sviluppato intorno al sito @lealternative D'altra parte si tratta di un progetto molto ambizioso perché mira a creare uno spazio per gli utenti italiani che vogliono un'alternativa ai gruppi facebook locali.

Facebook infatti deve il proprio successo a diversi fattori, primo tra tutti l'effetto rete che rende più interessante un luogo in cui sono presenti "miliardi" di persone, ma il motivo per cui tanti utenti rimangono è l'ecosistema che si è creato che prevede la creazione e la fruizione di:

1) eventi
2) annunci di vendita
3) gruppi Facebook

Per i primi due aspetti abbiamo già delle alternative nel #Fediverso.

L'aspetto degli eventi è coperto da Mobilizon, una piattaforma sviluppata da Framasoft proprio per creare un'alternativa agli eventi Facebook e che in Italia è presente con il portale mobilizon.it; ma in Italia abbiamo anche le bacheche federate delle diverse istanze locali Gancio, che con un'interfaccia minimale possono consentire a chiunque di inserire un evento datato e geolocalizzato; infine Friendica consente ai suoi utenti di creare eventi che hanno lo stesso aspetto degli eventi Facebook e inoltre l'utente #Friendica è anche in grado di "vedere" nel proprio calendario gli eventi creati da #Mobilizon e #Gancio! Aggiungiamo che il plugin #EventBridge for #Wordpress consente già ora di federare i blog Wordpress che hanno attivato il plugin #Activitypub for Wordpress e uno dei plugin dedicati alla gestione dei calendari.

Per quanto riguarda invece gli annunci di vendita, il nuovo progetto Fedimercatino.it ha portato per la prima volta in Italia un server #Flohmarkt, un ambiente dedicato soprattutto al riuso in cui tutti gli utenti iscritti possono inserire il proprio annuncio di vendita (ma con un limite di prezzo impostato a 200 euro).

Per sostituire i gruppi Facebook abbiamo già messo a disposizione sia i gruppi Friendica, sia una intera piattaforma basata su Lemmy, feddit.it, appunto, ma questa soluzione non consentiva una gestione ottimale dei gruppi locali.

Con il server citiverse.it abbiamo finalmente dato una risposta valida a questa esigenza!

Citiverse.it è basato su #NodeBB, una piattaforma open source nata per i forum e che proprio nel suo design consente di cerare diverse categorie ramificate. Lo sviluppatore di NodeBB ha intrapreso un percorso di ricerca delle tecnologie possibili per cercare di trovare una soluzione che consentisse di mettere in connessione tutti i forum basati sulla sua piattaforma, in modo che un utente di un forum NodeBB potesse riuscire a leggere e commentare i contenuti di un altro forum NodeBB mantenendo il proprio account. Questa soluzione è stata trovata proprio grazie al protocollo Activitypub e oggi possiamo riconoscere che l'implementazione di Activitypub in NodeBB è il caso di successo più interessante di tutto il Fediverso, forse ancora più interessante del capolavoro che, grazie allo sforzo di Matthias Pfefferle, ha reso Wordpress la soluzione oggi più facile di creare un'istanza federata.

NodeBB ci ha sorpreso molto positivamente: le funzionalità complete di una piattaforma forum professionale si sono sposate benissimo con l'implementazione di Activitypub e le possibilità di federare utenti e gruppi (le "categorie" vengono tradotte proprio in gruppi, come le comunità Lemmy o i gruppi Friendica) sono incredibilmente performanti.

Oggi abbiamo quindi deciso di imprimere una forte accelerazione che viene simboleggiata dalla modifica del logo provvisorio che avevamo creato per citiverse.it e che oggi, pur mantenendo i vecchi colori, vuole trasmettere l'idea della territorialità, della localizzazione del Fediverso e della componente più importante oggi gestita, ossia quella dei luoghi e delle città.

Oggi l'utilizzo di citiverse.it consente una convergenza tra tipologie diverse di utenti, pur mantenendo alcune caratteristiche distinte:

1) chi si iscrive al forum, infatti può disporre di poteri di moderazione (che vanno richiesti agli amministratori) e può "visualizzare" la struttura alberata tipica del Forum; ma può anche interagire con altri utenti del Fediverso e può "iscriversi" ad altri gruppi Activitypub come i gruppi Friendica, le comunità Lemmy, i magazine Mbin o le riviste Flipboard;
2) gli utenti del Fediverso possono comunque utilizzare le categorie del forum: chi abita nel Fediverso dei gruppi (Lemmy, Mbin, Piefed, etc) può "iscriversi" alle categorie di Citiverse e creare o partecipare alle discussioni; chi abita nel Fediverso dei social (Mastodon, Friendica, Misskey, Pixelfed, etc) può invece "seguire" quelli che verranno mostrati come account di tipo "gruppo" e può crear un proprio thread semplicemente menzionando l'account corrispondente alla categoria, oltre naturalmente a seguire i singoli utenti del Forum!

Citiverse.it non è solo luoghi e città, ma presenta anche altre categorie, eppure il focus principale è sulle comunità locali e le associazioni locali; ci sono, è vero, anche categorie su temi di interesse generale, ma chiediamo a tutti gli utenti del Fediverso di valorizzare soprattutto le categorie locali, perché è da questo che dipenderà il successo dell'iniziativa e la sua "portata" nel Fediverso.

Oggi siamo arrivati a creare una novantina di città, tra province e alcune località più rilevanti, ma dobbiamo aggiungerne ancora una quarantina per completare le province e se avete qualche richiesta particolare, potete farci una richiesta. Abbiate fiducia!

Per questo progetto abbiamo investito le nostre risorse e il nostro tempo, perché riteniamo importante creare alternative: non abbiamo voluto creare citiverse.it per rinchiudere i "nostri" utenti sequestrandoli nel nostro forum, ma per offrire un servizio a tutti gli utenti italiani, sia quelli del nostro forum, sia quelli delle nostre istanze, sia quelli di tutte le istanze!

Quando utilizzate le categorie di citiverse.it ricordatevi di questo nostro sforzo e, dopo avere naturalmente sostenuto le istanze che vi ospitano, ricordatevi anche che un modo molto gradito di farci avere un riscontro positivo è quello di aiutarci nella campagna di autofinanziamento!

citiverse.it/donazioni

activitypub.blog/2025/12/17/7-…

ActivityPub for WordPress

2025-12-17 17:06:56

7.8.0 – Happy Holidays

As the year winds down, we’ve wrapped up a release that brings better moderation tools, a new way to display reactions, and a small surprise, just in time for the holidays.

Stronger Tools for Moderation

Moderation can be hard work, especially on the Fediverse, where conversations flow in from all directions. This release introduces new tools that help you stay in control with less manual effort.

You can now subscribe to shared blocklists and let the plugin keep them up to date automatically. Subscribed lists are synced on a weekly cadence, so changes made upstream are reflected on your site without you having to lift a finger.

On top of that, we’ve added a bulk domain blocklist importer. You can upload a CSV or plain text file, including Mastodon-style exports, and quickly add large numbers of domains at once. To make it even easier to get started, the importer includes a one-click option for the popular community-maintained IFTAS DNI list (@about.iftas.org).

Together, these features make moderation more scalable and less stressful, so you can spend more time engaging and less time firefighting.

Reactions, Your Way

Reactions are a big part of how conversations feel alive on the Fediverse, and now you have more control over how they appear on your site.

The Fediverse Reactions block gained a new Summary display style. Instead of showing a facepile of avatars, this option presents reactions as clean, inline counters for comments, likes, boosts, and replies. It’s a great fit for minimal layouts, feeds, or sites where avatars are disabled.

You can switch between the classic facepile and the new summary style directly in the block settings. And if avatars are turned off in discussion settings, the block automatically falls back to the summary view.

A Sneak Peek at the Reader (Experimental)

One more thing, for the curious among you, there’s now an early preview of the ActivityPub Reader, hidden behind a feature flag in the Advanced settings tab. If you don’t see it yet, open Screen Options at the top right of the ActivityPub settings page, check “Advanced Settings,” and save. That reveals the Advanced tab where you can enable the Reader.

When enabled, this adds a new “Social Web” submenu to your Dashboard menu item. An place where you can read posts and shares from accounts you follow, turning your WordPress admin into a lightweight Fediverse reader.

Because this is still very much a work in progress, the Reader is disabled by default and clearly marked as experimental. The UI, behavior, and feature set will change significantly in future releases as we explore what a great native Fediverse reading experience inside WordPress could look like.

If you enjoy testing new ideas, we’d love to hear your feedback, whether it’s bug reports, rough edges you’ve noticed, or ideas about what this Reader should become. Early input helps shape where this goes next, so feel free to share your thoughts in whatever form works best for you.

Changelog

Added

• Add blocklist subscriptions for automatic weekly synchronization of remote blocklists.
• Add compact display style to Reactions block that hides avatars.
• Add domain blocklist importer for bulk importing blocked domains.
• Add image optimization for imported attachments (resize to 1200px max, convert to WebP).
• Add local caching for remote actor avatars.
• Add relay mode to forward public activities to all followers.
• Add scheduled cleanup for remote posts, preserving posts with local user interactions.
• Add site health check to warn when DISABLE_WP_CRON may impact ActivityPub functionality.
• Add Social Web Reader for browsing ActivityPub content directly in WordPress admin.
• Delete remote posts on plugin uninstall.
• Mastodon importer now imports self-replies as comments, preserving thread structure.

Changed

• Cache expensive operations in Post transformer to improve performance.
• Improve performance and reliability of @-mention detection.
• Reduce federated content size by removing unnecessary HTML attributes.
• Skip downloading video and audio attachments, embedding remote URLs directly to avoid storage limits.
• Use stable term_id-based IDs for Term transformer to ensure federation consistency.
• Wrap blocked domains and keywords tables in collapsible details element.

Fixed

• Respect WordPress “show avatars” setting for remote actor avatars.
• Ensure NodeInfo accurately represents site administrators to the Fediverse.
• Fediverse Followers block now works correctly when the “Hide Social Graph” privacy option is enabled.
• Fix NodeInfo documents to comply with schema specification.
• Follow Me block button-only style now respects width settings from the inner Button block.
• Preserve whitespace inside preformatted elements when federating content.

Downloads

• WordPress.org: activitypub.7.8.0.zip
• GitHub: tag/7.8.0

Holiday Thanks

A special thank-you to everyone who joined us during the recent office hours — for the questions, the thoughtful feedback, and the great conversations about where ActivityPub for WordPress should go next. Talking directly with you helps shape these releases more than any roadmap ever could.

See you in 2026 — and happy holidays!

IFTAS Do Not Interact (DNI) Denylist

About this denylist The Do Not Interact List is an IFTAS-curated list of domains that are highly recommended for defederation. Each domain is labelled using a shared vocabulary label. Each dom…

^IFTAS

Cloud Atlas activity in the first half of 2025: what changed

Known since 2014, the Cloud Atlas group targets countries in Eastern Europe and Central Asia. Infections occur via phishing emails containing a malicious document that exploits an old vulnerability in the Microsoft Office Equation Editor process (CVE-2018-0802) to download and execute malicious code. In this report, we describe the infection chain and tools that the group used in the first half of 2025, with particular focus on previously undescribed implants.

Additional information about this threat, including indicators of compromise, is available to customers of the Kaspersky Intelligence Reporting Service. Contact: intelreports@kaspersky.com.

Technical details

Initial infection

The starting point is typically a phishing email with a malicious DOC(X) attachment. When the document is opened, a malicious template is downloaded from a remote server. The document has the form of an RTF file containing an exploit for the formula editor, which downloads and executes an HTML Application (HTA) file.
Fpaylo

Malicious template with the exploit loaded by Word when opening the document

We were unable to obtain the actual RTF template with the exploit. We assume that after a successful infection of the victim, the link to this file becomes inaccessible. In the given example, the malicious RTF file containing the exploit was downloaded from the URL hxxps://securemodem[.]com?tzak.html_anacid.

Template files, like HTA files, are located on servers controlled by the group, and their downloading is limited both in time and by the IP addresses of the victims. The malicious HTA file extracts and creates several VBS files on disk that are parts of the VBShower backdoor. VBShower then downloads and installs other backdoors: PowerShower, VBCloud, and CloudAtlas.

This infection chain largely follows the one previously seen in Cloud Atlas’ 2024 attacks. The currently employed chain is presented below:

Malware execution flow

Several implants remain the same, with insignificant changes in file names, and so on. You can find more details in our previous article on the following implants:

• HTA file
• VBShower::Launcher
• VBShower::Cleaner

In this research, we’ll focus on new and updated components.

VBShower

VBShower::Backdoor

Compared to the previous version, the backdoor runs additional downloaded VB scripts in the current context, regardless of the size. A previous modification of this script checked the size of the payload, and if it exceeded 1 MB, instead of executing it in the current context, the backdoor wrote it to disk and used the wscript utility to launch it.

VBShower::Payload (1)

The script collects information about running processes, including their creation time, caption, and command line. The collected information is encrypted and sent to the C2 server by the parent script (VBShower::Backdoor) via the v_buff variable.

VBShower::Payload (1)

VBShower::Payload (2)

The script is used to install the VBCloud implant. First, it downloads a ZIP archive from the hardcoded URL and unpacks it into the %Public% directory. Then, it creates a scheduler task named “MicrosoftEdgeUpdateTask” to run the following command line:
wscript.exe /B %Public%\Libraries\MicrosoftEdgeUpdate.vbs
It renames the unzipped file %Public%\Libraries\v.log to %Public%\Libraries\MicrosoftEdgeUpdate.vbs, iterates through the files in the %Public%\Libraries directory, and collects information about the filenames and sizes. The data, in the form of a buffer, is collected in the v_buff variable. The malware gets information about the task by executing the following command line:
cmd.exe /c schtasks /query /v /fo CSV /tn MicrosoftEdgeUpdateTask
The specified command line is executed, with the output redirected to the TMP file. Both the TMP file and the content of the v_buff variable will be sent to the C2 server by the parent script (VBShower::Backdoor).

Here is an example of the information present in the v_buff variable:
Libraries:
desktop.ini-175|
MicrosoftEdgeUpdate.vbs-2299|
RecordedTV.library-ms-999|
upgrade.mds-32840|
v.log-2299|
The file MicrosoftEdgeUpdate.vbs is a launcher for VBCloud, which reads the encrypted body of the backdoor from the file upgrade.mds, decrypts it, and executes it.

VBShower::Payload (2) used to install VBCloud

Almost the same script is used to install the CloudAtlas backdoor on an infected system. The script only downloads and unpacks the ZIP archive to "%LOCALAPPDATA%", and sends information about the contents of the directories "%LOCALAPPDATA%\vlc\plugins\access" and "%LOCALAPPDATA%\vlc" as output.

In this case, the file renaming operation is not applied, and there is no code for creating a scheduler task.

Here is an example of information to be sent to the C2 server:
vlc:
a.xml-969608|
b.xml-592960|
d.xml-2680200|
e.xml-185224||
access:
c.xml-5951488|
In fact, a.xml, d.xml, and e.xml are the executable file and libraries, respectively, of VLC Media Player. The c.xml file is a malicious library used in a DLL hijacking attack, where VLC acts as a loader, and the b.xml file is an encrypted body of the CloudAtlas backdoor, read from disk by the malicious library, decrypted, and executed.

VBShower::Payload (2) used to install CloudAtlas

VBShower::Payload (3)

This script is the next component for installing CloudAtlas. It is downloaded by VBShower from the C2 server as a separate file and executed after the VBShower::Payload (2) script. The script renames the XML files unpacked by VBShower::Payload (2) from the archive to the corresponding executables and libraries, and also renames the file containing the encrypted backdoor body.

These files are copied by VBShower::Payload (3) to the following paths:

Additionally, VBShower::Payload (3) creates a scheduler task to execute the command line: "%LOCALAPPDATA%\vlc\vlc.exe". The script then iterates through the files in the "%LOCALAPPDATA%\vlc" and "%LOCALAPPDATA%\vlc\plugins\access" directories, collecting information about filenames and sizes. The data, in the form of a buffer, is collected in the v_buff variable. The script also retrieves information about the task by executing the following command line, with the output redirected to a TMP file:
cmd.exe /c schtasks /query /v /fo CSV /tn MicrosoftVLCTaskMachine
Both the TMP file and the content of the v_buff variable will be sent to the C2 server by the parent script (VBShower::Backdoor).

VBShower::Payload (3) used to install CloudAtlas

VBShower::Payload (4)

This script was previously described as VBShower::Payload (1).

VBShower::Payload (5)

This script is used to check access to various cloud services and executed before installing VBCloud or CloudAtlas. It consistently accesses the URLs of cloud services, and the received HTTP responses are saved to the v_buff variable for subsequent sending to the C2 server. A truncated example of the information sent to the C2 server:
GET-webdav.yandex.ru|
200|
<!DOCTYPE html><html lang="ru" dir="ltr" class="desktop"><head><base href="...

VBShower::Payload (5)

VBShower::Payload (6)

This script was previously described as VBShower::Payload (2).

VBShower::Payload (7)

This is a small script for checking the accessibility of PowerShower’s C2 from an infected system.

VBShower::Payload (7)

VBShower::Payload (8)

This script is used to install PowerShower, another backdoor known to be employed by Cloud Atlas. The script does so by performing the following steps in sequence:

1. Creates registry keys to make the console window appear off-screen, effectively hiding it:
   "HKCU\Console\%SystemRoot%_System32_WindowsPowerShell_v1.0_powershell.exe"::"WindowPosition"::5122
   "HKCU\UConsole\taskeng.exe"::"WindowPosition"::538126692
2. Creates a “MicrosoftAdobeUpdateTaskMachine” scheduler task to execute the command line:
   powershell.exe -ep bypass -w 01 %APPDATA%\Adobe\AdobeMon.ps1
3. Decrypts the contents of the embedded data block with XOR and saves the resulting script to the file "%APPDATA%\Adobe\p.txt". Then, renames the file "p.txt" to "AdobeMon.ps1".
4. Collects information about file names and sizes in the path "%APPDATA%\Adobe". Gets information about the task by executing the following command line, with the output redirected to a TMP file:
   cmd.exe /c schtasks /query /v /fo LIST /tn MicrosoftAdobeUpdateTaskMachine

VBShower::Payload (8) used to install PowerShower

The decrypted PowerShell script is disguised as one of the standard modules, but at the end of the script, there is a command to launch the PowerShell interpreter with another script encoded in Base64.

Content of AdobeMon.ps1 (PowerShower)

VBShower::Payload (9)

This is a small script for collecting information about the system proxy settings.

VBShower::Payload (9)

VBCloud

On an infected system, VBCloud is represented by two files: a VB script (VBCloud::Launcher) and an encrypted main body (VBCloud::Backdoor). In the described case, the launcher is located in the file MicrosoftEdgeUpdate.vbs, and the payload — in upgrade.mds.

VBCloud::Launcher

The launcher script reads the contents of the upgrade.mds file, decodes characters delimited with “%H”, uses the RC4 stream encryption algorithm with a key built into the script to decrypt it, and transfers control to the decrypted content. It is worth noting that the implementation of RC4 uses PRGA (pseudo-random generation algorithm), which is quite rare, since most malware implementations of this algorithm skip this step.

VBCloud::Launcher

VBCloud::Backdoor

The backdoor performs several actions in a loop to eventually download and execute additional malicious scripts, as described in the previous research.

VBCloud::Payload (FileGrabber)

Unlike VBShower, which uses a global variable to save its output or a temporary file to be sent to the C2 server, each VBCloud payload communicates with the C2 server independently. One of the most commonly used payloads for the VBCloud backdoor is FileGrabber. The script exfiltrates files and documents from the target system as described before.

The FileGrabber payload has the following limitations when scanning for files:

• It ignores the following paths:
  
  • Program Files
  • Program Files (x86)
  • %SystemRoot%

  
  

• The file size for archiving must be between 1,000 and 3,000,000 bytes.
• The file’s last modification date must be less than 30 days before the start of the scan.
• Files containing the following strings in their names are ignored:
  
  • “intermediate.txt”
  • “FlightingLogging.txt”
  • “log.txt”
  • “thirdpartynotices”
  • “ThirdPartyNotices”
  • “easylist.txt”
  • “acroNGLLog.txt”
  • “LICENSE.txt”
  • “signature.txt”
  • “AlternateServices.txt”
  • “scanwia.txt”
  • “scantwain.txt”
  • “SiteSecurityServiceState.txt”
  • “serviceworker.txt”
  • “SettingsCache.txt”
  • “NisLog.txt”
  • “AppCache”
  • “backupTest”

  
  

Part of VBCloud::Payload (FileGrabber)

PowerShower

As mentioned above, PowerShower is installed via one of the VBShower payloads. This script launches the PowerShell interpreter with another script encoded in Base64. Running in an infinite loop, it attempts to access the C2 server to retrieve an additional payload, which is a PowerShell script twice encoded with Base64. This payload is executed in the context of the backdoor, and the execution result is sent to the C2 server via an HTTP POST request.

Decoded PowerShower script

In previous versions of PowerShower, the payload created a sapp.xtx temporary file to save its output, which was sent to the C2 server by the main body of the backdoor. No intermediate files are created anymore, and the result of execution is returned to the backdoor by a normal call to the "return" operator.

PowerShower::Payload (1)

This script was previously described as PowerShower::Payload (2). This payload is unique to each victim.

PowerShower::Payload (2)

This script is used for grabbing files with metadata from a network share.

PowerShower::Payload (2)

CloudAtlas

As described above, the CloudAtlas backdoor is installed via VBShower from a downloaded archive delivered through a DLL hijacking attack. The legitimate VLC application acts as a loader, accompanied by a malicious library that reads the encrypted payload from the file and transfers control to it. The malicious DLL is located at "%LOCALAPPDATA%\vlc\plugins\access", while the file with the encrypted payload is located at "%LOCALAPPDATA%\vlc\".

When the malicious DLL gains control, it first extracts another DLL from itself, places it in the memory of the current process, and transfers control to it. The unpacked DLL uses a byte-by-byte XOR operation to decrypt the block with the loader configuration. The encrypted config immediately follows the key. The config specifies the name of the event that is created to prevent a duplicate payload launch. The config also contains the name of the file where the encrypted payload is located — "chambranle" in this case — and the decryption key itself.

Encrypted and decrypted loader configuration

The library reads the contents of the "chambranle" file with the payload, uses the key from the decrypted config and the IV located at the very end of the "chambranle" file to decrypt it with AES-256-CBC. The decrypted file is another DLL with its size and SHA-1 hash embedded at the end, added to verify that the DLL is decrypted correctly. The DLL decrypted from "chambranle" is the main body of the CloudAtlas backdoor, and control is transferred to it via one of the exported functions, specifically the one with ordinal 2.

Main routine that processes the payload file

When the main body of the backdoor gains control, the first thing it does is decrypt its own configuration. Decryption is done in a similar way, using AES-256-CBC. The key for AES-256 is located before the configuration, and the IV is located right after it. The most useful information in the configuration file includes the URL of the cloud service, paths to directories for receiving payloads and unloading results, and credentials for the cloud service.

Encrypted and decrypted CloudAtlas backdoor config

Immediately after decrypting the configuration, the backdoor starts interacting with the C2 server, which is a cloud service, via WebDAV. First, the backdoor uses the MKCOL HTTP method to create two directories: one ("/guessed/intershop/Euskalduns/") will regularly receive a beacon in the form of an encrypted file containing information about the system, time, user name, current command line, and volume information. The other directory ("/cancrenate/speciesists/") is used to retrieve payloads. The beacon file and payload files are AES-256-CBC encrypted with the key that was used for backdoor configuration decryption.

HTTP requests of the CloudAtlas backdoor

The backdoor uses the HTTP PROPFIND method to retrieve the list of files. Each of these files will be subsequently downloaded, deleted from the cloud service, decrypted, and executed.

HTTP requests from the CloudAtlas backdoor

The payload consists of data with a binary block containing a command number and arguments at the beginning, followed by an executable plugin in the form of a DLL. The structure of the arguments depends on the type of command. After the plugin is loaded into memory and configured, the backdoor calls the exported function with ordinal 1, passing several arguments: a pointer to the backdoor function that implements sending files to the cloud service, a pointer to the decrypted backdoor configuration, and a pointer to the binary block with the command and arguments from the beginning of the payload.

Plugin setup and execution routine

Before calling the plugin function, the backdoor saves the path to the current directory and restores it after the function is executed. Additionally, after execution, the plugin is removed from memory.

CloudAtlas::Plugin (FileGrabber)

FileGrabber is the most commonly used plugin. As the name suggests, it is designed to steal files from an infected system. Depending on the command block transmitted, it is capable of:

• Stealing files from all local disks
• Stealing files from the specified removable media
• Stealing files from specified folders
• Using the selected username and password from the command block to mount network resources and then steal files from them

For each detected file, a series of rules are generated based on the conditions passed within the command block, including:

• Checking for minimum and maximum file size
• Checking the file’s last modification time
• Checking the file path for pattern exclusions. If a string pattern is found in the full path to a file, the file is ignored
• Checking the file name or extension against a list of patterns

Resource scanning

If all conditions match, the file is sent to the C2 server, along with its metadata, including attributes, creation time, last access time, last modification time, size, full path to the file, and SHA-1 of the file contents. Additionally, if a special flag is set in one of the rule fields, the file will be deleted after a copy is sent to the C2 server. There is also a limit on the total amount of data sent, and if this limit is exceeded, scanning of the resource stops.

Generating data for sending to C2

CloudAtlas::Plugin (Common)

This is a general-purpose plugin, which parses the transferred block, splits it into commands, and executes them. Each command has its own ID, ranging from 0 to 6. The list of commands is presented below.

1. Command ID 0: Creates, sets and closes named events.
2. Command ID 1: Deletes the selected list of files.
3. Command ID 2: Drops a file on disk with content and a path selected in the command block arguments.
4. Command ID 3: Capable of performing several operations together or independently, including:
   
   1. Dropping several files on disk with content and paths selected in the command block arguments
   2. Dropping and executing a file at a specified path with selected parameters. This operation supports three types of launch:
   • Using the WinExec function
   • Using the ShellExecuteW function
   • Using the CreateProcessWithLogonW function, which requires that the user’s credentials be passed within the command block to launch the process on their behalf

   
   

5. Command ID 4: Uses the StdRegProv COM interface to perform registry manipulations, supporting key creation, value deletion, and value setting (both DWORD and string values).
6. Command ID 5: Calls the ExitProcess function.
7. Command ID 6: Uses the credentials passed within the command block to connect a network resource, drops a file to the remote resource under the name specified within the command block, creates and runs a VB script on the local system to execute the dropped file on the remote system. The VB script is created at "%APPDATA%\ntsystmp.vbs". The path to launch the file dropped on the remote system is passed to the launched VB script as an argument.

Content of the dropped VBS

CloudAtlas::Plugin (PasswordStealer)

This plugin is used to steal cookies and credentials from browsers. This is an extended version of the Common Plugin, which is used for more specific purposes. It can also drop, launch, and delete files, but its primary function is to drop files belonging to the “Chrome App-Bound Encryption Decryption” open-source project onto the disk, and run the utility to steal cookies and passwords from Chromium-based browsers. After launching the utility, several files ("cookies.txt" and "passwords.txt") containing the extracted browser data are created on disk. The plugin then reads JSON data from the selected files, parses the data, and sends the extracted information to the C2 server.

Part of the function for parsing JSON and sending the extracted data to C2

CloudAtlas::Plugin (InfoCollector)

This plugin is used to collect information about the infected system. The list of commands is presented below.

1. Command ID 0xFFFFFFF0: Collects the computer’s NetBIOS name and domain information.
2. Command ID 0xFFFFFFF1: Gets a list of processes, including full paths to executable files of processes, and a list of modules (DLLs) loaded into each process.
3. Command ID 0xFFFFFFF2: Collects information about installed products.
4. Command ID 0xFFFFFFF3: Collects device information.
5. Command ID 0xFFFFFFF4: Collects information about logical drives.
6. Command ID 0xFFFFFFF5: Executes the command with input/output redirection, and sends the output to the C2 server. If the command line for execution is not specified, it sequentially launches the following utilities and sends their output to the C2 server:

net group "Exchange servers" /domain
Ipconfig
arp -a

Python script

As mentioned in one of our previous reports, Cloud Atlas uses a custom Python script named get_browser_pass.py to extract saved credentials from browsers on infected systems. If the Python interpreter is not present on the victim’s machine, the group delivers an archive that includes both the script and a bundled Python interpreter to ensure execution.

During one of the latest incidents we investigated, we once again observed traces of this tool in action, specifically the presence of the file "C:\ProgramData\py\pytest.dll".

The pytest.dll library is called from within get_browser_pass.py and used to extract credentials from Yandex Browser. The data is then saved locally to a file named y3.txt.

Victims

According to our telemetry, the identified targets of the malicious activities described here are located in Russia and Belarus, with observed activity dating back to the beginning of 2025. The industries being targeted are diverse, encompassing organizations in the telecommunications sector, construction, government entities, and plants.

Conclusion

For more than ten years, the group has carried on its activities and expanded its arsenal. Now the attackers have four implants at their disposal (PowerShower, VBShower, VBCloud, CloudAtlas), each of them a full-fledged backdoor. Most of the functionality in the backdoors is duplicated, but some payloads provide various exclusive capabilities. The use of cloud services to manage backdoors is a distinctive feature of the group, and it has proven itself in various attacks.

Indicators of compromise

Note: The indicators in this section are valid at the time of publication.

File hashes

0D309C25A835BAF3B0C392AC87504D9E протокол (08.05.2025).doc
D34AAEB811787B52EC45122EC10AEB08 HTA
4F7C5088BCDF388C49F9CAAD2CCCDCC5 StandaloneUpdate_2020-04-13_090638_8815-145.log:StandaloneUpdate_2020-04-13_090638_8815-145cfcf.vbs
24BFDFFA096D3938AB6E626E418572B1 StandaloneUpdate_2020-04-13_090638_8815-145.log:StandaloneUpdate_2020-04-13_090638_8815-145.vbs
5C93AF19EF930352A251B5E1B2AC2519 StandaloneUpdate_2020-04-13_090638_8815-145.log:StandaloneUpdate_2020-04-13_090638_8815-145.dat (encrypted)
0E13FA3F06607B1392A3C3CAA8092C98 VBShower::Payload(1)
BC80C582D21AC9E98CBCA2F0637D8993 VBShower::Payload(2)
EBD6DA3B4D452BD146500EBC6FC49AAE VBShower::Payload(2)
12F1F060DF0C1916E6D5D154AF925426 VBShower::Payload(3)
E8C21CA9A5B721F5B0AB7C87294A2D72 VBShower::Payload(4)
2D03F1646971FB7921E31B647586D3FB VBShower::Payload(5)
7A85873661B50EA914E12F0523527CFA VBShower::Payload(6)
F31CE101CBE25ACDE328A8C326B9444A VBShower::Payload(7)
E2F3E5BF7EFBA58A9C371E2064DFD0BB VBShower::Payload(8)
67156D9D0784245AF0CAE297FC458AAC VBShower::Payload(9)
116E5132E30273DA7108F23A622646FE VBCloud::Launcher
1C7387D957C5381E11D1E6EDC0F3F353 upgrade.mds
E9F60941A7CED1A91643AF9D8B92A36D VBCloud::Payload(FileGrabber)
718B9E688AF49C2E1984CF6472B23805 PowerShower
A913EF515F5DC8224FCFFA33027EB0DD PowerShower::Payload(2)
F56DAD18A308B64247D0C3360DDB1727 PowerShower::Payload(2)
62170C67523C8F5009E3658F5858E8BF libvnc_plugin.dll
BAA59BB050A12DBDF981193D88079232 chambranle (encrypted)
097D18D92C2167D2F4E94F04C5A12D33 system.dll
B0100C43BD9B024C6367B38ABDF5C0D2 system_check.exe
7727AAE4A0840C7DC037634BED6A6D74 pytest.dll

Domains and IPs

billet-ru[.]net
mskreg[.]net
flashsupport[.]org
solid-logit[.]com
cityru-travel[.]org
transferpolicy[.]org
information-model[.]net
securemodem[.]com
roskomnadz[.]com
processmanagerpro[.]net
luxoftinfo[.]com
marketru[.]net
rzhd[.]org
gimnazija[.]org
technoguides[.]org
multipackage[.]net
rostvgroup[.]com
russiatimes[.]info
updatechecker[.]org
rosatomgroup[.]com
telehraf[.]com
statusupport[.]org
perfectfinder[.]net

securelist.com/cloud-atlas-h1-…