General

  • Target

    BootstrapperNew.exe

  • Size

    3.2MB

  • Sample

    250302-b4a94sznz2

  • MD5

    7e5b05edd4fc5123a6156664e4c37163

  • SHA1

    c686009d9f8a4d4c66236c77bbc3d7a0380e4bb7

  • SHA256

    eed32abbafc11dcb93a5657cc4a5c651d620b4be6fb935e322de765d3d005b16

  • SHA512

    5bab95aa627fe696f05d0d6ebd77e43050b9071e1d753c08e52fe85338018163e773ff8d638c07d789030315ba75ec5379ce55858a4ede72e2db08049b3d9311

  • SSDEEP

    98304:zOq7GTRgy8ao7iHl5CjjTwL1cLoGkqI2ouIAS:ibRSVECVkX8

Malware Config

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

      7e5b05edd4fc5123a6156664e4c37163

    • SHA1

      c686009d9f8a4d4c66236c77bbc3d7a0380e4bb7

    • SHA256

      eed32abbafc11dcb93a5657cc4a5c651d620b4be6fb935e322de765d3d005b16

    • SHA512

      5bab95aa627fe696f05d0d6ebd77e43050b9071e1d753c08e52fe85338018163e773ff8d638c07d789030315ba75ec5379ce55858a4ede72e2db08049b3d9311

    • SSDEEP

      98304:zOq7GTRgy8ao7iHl5CjjTwL1cLoGkqI2ouIAS:ibRSVECVkX8

    • 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

    • 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