General

  • Target

    xWorm+v5.6.exe

  • Size

    12.0MB

  • Sample

    240831-xlc7mszcpb

  • MD5

    a97ea9e6786a02d1651e023b8e2b6aa1

  • SHA1

    5614e602de8ef7c1095450f5053ed14c8e17f31e

  • SHA256

    8e3ca6388350b76e63e673c31dc7fea8772156f640c0d76c8ddd8e552c9f8e90

  • SHA512

    894c898d1c1b64353bf4f38cbdb477596d780b137a06c2012932c05dddbba4f4f850b76ba0da930b8b626ae6a3b14013ff319a71cb030332dbb9fbd6859b20b8

  • SSDEEP

    6144:5MaUDc37elZKI7ig55JIuzRt4qDKYrYHsW73:FT3wF5JIKRt4qmBsW7

Malware Config

Extracted

Family

umbral

C2

https://canary.discord.com/api/webhooks/1279146469588340746/OZT0SJ0y5zhhi2z7H8eJ576F3-SmO2zrejY7aiS_DYX6c0ea5nuejVV4CjY8Hs9MDl_G

Extracted

Family

xworm

Version

5.0

C2

japanese-longer.gl.at.ply.gg:28461

Mutex

MDePCKGcpJNC9Aji

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

aes.plain

Targets

    • Target

      xWorm+v5.6.exe

    • Size

      12.0MB

    • MD5

      a97ea9e6786a02d1651e023b8e2b6aa1

    • SHA1

      5614e602de8ef7c1095450f5053ed14c8e17f31e

    • SHA256

      8e3ca6388350b76e63e673c31dc7fea8772156f640c0d76c8ddd8e552c9f8e90

    • SHA512

      894c898d1c1b64353bf4f38cbdb477596d780b137a06c2012932c05dddbba4f4f850b76ba0da930b8b626ae6a3b14013ff319a71cb030332dbb9fbd6859b20b8

    • SSDEEP

      6144:5MaUDc37elZKI7ig55JIuzRt4qDKYrYHsW73:FT3wF5JIKRt4qmBsW7

    • Detect Umbral payload

    • Detect Xworm Payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Drops file in Drivers directory

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Adds Run key to start application

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v15

Tasks