General

  • Target

    Nursultan.exe

  • Size

    19.8MB

  • Sample

    240609-sev2nace27

  • MD5

    4aa0a579b602bd4434e6c857294fcca5

  • SHA1

    3b4fec5946e430c54ec4b9170b165c9893368c1b

  • SHA256

    13dcf8833f9fe533311420d9db085b180aca2ff1674e692c79b6596ebf5a83cd

  • SHA512

    58fc656496033afdeda99efb2d9576fcc46e4b8af96ed0d024dc13b1fd775a98dad74d53f917c0e63980129221ecd686a8e178a86da423fadaac0761d50eff4a

  • SSDEEP

    393216:kTspQo6f651rlw2PbRAInE5xg2N0hS+cpEMqT96SDtwdM7d3dgB7bSu8bafx3:kQuo6kBbeIACkAaE6k4MwBau8ix

Malware Config

Extracted

Family

xworm

C2

north-modem.gl.at.ply.gg:45517

Attributes
  • Install_directory

    %AppData%

  • install_file

    Antimalware Service Executable.exe

Targets

    • Target

      Nursultan.exe

    • Size

      19.8MB

    • MD5

      4aa0a579b602bd4434e6c857294fcca5

    • SHA1

      3b4fec5946e430c54ec4b9170b165c9893368c1b

    • SHA256

      13dcf8833f9fe533311420d9db085b180aca2ff1674e692c79b6596ebf5a83cd

    • SHA512

      58fc656496033afdeda99efb2d9576fcc46e4b8af96ed0d024dc13b1fd775a98dad74d53f917c0e63980129221ecd686a8e178a86da423fadaac0761d50eff4a

    • SSDEEP

      393216:kTspQo6f651rlw2PbRAInE5xg2N0hS+cpEMqT96SDtwdM7d3dgB7bSu8bafx3:kQuo6kBbeIACkAaE6k4MwBau8ix

    • 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#.

    • 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