General

  • Target

    BootstrapperNew.exe

  • Size

    3.2MB

  • Sample

    250302-bwz89sy1av

  • MD5

    5d7608bf288d15a463991dd64a4a6833

  • SHA1

    568225dbe01f06297daedce0f7a161bc20c3f121

  • SHA256

    257f3886ec3712e93b4358a75a0bbedd236bae9d4f0ecb899664dd751de78f1b

  • SHA512

    af3c3b12066eedfdf7302ad1632d475c29cc74a7627584773e556a2ad7779102ae0f431192fb6404a7d191a7a38eda9e46d3d406f569de066a4d5a426f7218fb

  • SSDEEP

    98304:f0HJOQVG56a9CyT3hpbMhtYy/z+SSoYzYnix:wA2s6aUyT3hWr+FoUYn

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1345563600563081236/GZtFNjEkLtJVtAzkn2iuPtsNvHDVfN9T4KKvHQkKe2uwIcUso69vFJFK67xNihrhEyDY

Extracted

Family

xworm

C2

127.0.0.1:34930

minimum-ball.gl.at.ply.gg:34930

Attributes
  • Install_directory

    %AppData%

  • install_file

    SolaraX.exe

Targets

    • Target

      BootstrapperNew.exe

    • Size

      3.2MB

    • MD5

      5d7608bf288d15a463991dd64a4a6833

    • SHA1

      568225dbe01f06297daedce0f7a161bc20c3f121

    • SHA256

      257f3886ec3712e93b4358a75a0bbedd236bae9d4f0ecb899664dd751de78f1b

    • SHA512

      af3c3b12066eedfdf7302ad1632d475c29cc74a7627584773e556a2ad7779102ae0f431192fb6404a7d191a7a38eda9e46d3d406f569de066a4d5a426f7218fb

    • SSDEEP

      98304:f0HJOQVG56a9CyT3hpbMhtYy/z+SSoYzYnix:wA2s6aUyT3hWr+FoUYn

    • Detect Umbral payload

    • Detect Xworm Payload

    • Umbral

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

    • Umbral family

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • 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

    • Loads dropped DLL

    • 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

    • Legitimate hosting services abused for malware hosting/C2

    • 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