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JS.Stealer.191

Added to the Dr.Web virus database: 2026-07-31

Virus description added:

SHA1:

  • f321b422c4b2fc560ea87520e5720d1c12ea93f3

Description

This data theft trojan takes part in the attack that leverages bogus GitHub repositories to target blockchain game enthusiasts and information security professionals. JS.Stealer.191 steals users' personal data.

Operation

Trojan.Loader.3261 downloads the archive Nexara.7z containing yet another compressed file Nvdia.7z, whose content includes the malicious module JS.Stealer.191. The stealer runs a VM/sandbox check. Then it collects information about the infected device and its users and subsequently transmits it to the attackers via their Telegram bot. The collected data includes:

  • passwords, cookie files, bookmarks, autofill data, browsing and download history, and banking data stored by browsers;
  • FileZilla's XML files;
  • The MobaXterm file MobaXterm.ini;
  • Total Commander’s wcx_ftp.ini file;
  • OpenVPN, NordVPN and ProtonVPN configuration files;
  • Element, Signal, ICQ, Skype, Tox, Telegram, Pidgin files;
  • Minecraft, Growtopia, Roblox, Valorant account information;
  • Account information associated with such game platforms as GOG.com, Steam, Electronic Arts, Rockstar Games, Launcher, Ubisoft Connect, Battle.net, RiotGames, EpicGamesLauncher;
  • Discord tokens.

In addition, JS.Stealer.191 downloads 7zip and installs it into C:\\ProgramData\\sevenZip\\7z.exe. The stolen data is compressed ($7'YI^c=bbW9Koz is the archive password) and forwarded to the Telegram bot.

MITRE ATT@CK MATRIX

Tactic Technique
Stealth

Virtualization/sandbox evasion (T1497)

Obfuscated files or information (T1027)

Credential Access

Steal Web Session Cookie (T1539)

Credentials from Web Browsers (T1555.003)

Discovery

Virtualization/Sandbox Evasion (T1497)

System owner/User Discovery (T1033)

System Information Discovery (T1082)

File and Directory Discovery (T1083)

Collection

Data Staged (T1074)

Data from Local System (T1005)

Archive Collected Data (T1560)

Command and Control

Ingress Tool Transfer (T1105)

One-Way Communication (T1102.003)

Exfiltration Exfiltration Over Web Service (T1567)

More about Trojan.Loader.3261

More about Trojan.Clipper.688

Indicators of compromise

Trojan review publication

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
  2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
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Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
    • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

Find out more about Dr.Web for Android