General

  • Target
    crepter.rar
  • Size 1.0MB
  • Sample260815-hx4fms1eqf
  • SHA256 3370805d9612cec60b70e0e3c195a2b59fed0a1e63b7f37eecdd43d2d80f2541
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • xworm

Version
  • 3.0

C2
  • 22.tcp.cpolar.top:13195

Mutex
  • 95bBVyr1BK1rorBy

Attributes
  • install_file

    USB.exe

aes.plain

Extracted

Family
  • umbral

Version
  • v1.3

C2
  • https://discord.com/api/webhooks/1538066552245583913/IdjetyA6dwgEQV1_cNmLaAISzSjOrlt1kb_1LQxXbnvAzhXJhwFKMCKo91h0ryWbIkD6

Targets

    • Target
      crepter.rar
    • Size 1.0MB
    • SHA256 3370805d9612cec60b70e0e3c195a2b59fed0a1e63b7f37eecdd43d2d80f2541
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detect Xworm Payload

    • Detects Umbral payload

    • Family: Umbral

      Umbral stealer is an open-source modular stealer written in C#.

    • Family: 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.

    • Disables one or more Microsoft Defender components

      Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Disables automatic submission of suspicious files to Microsoft by Windows Defender

      Uses the Powershell Set-MpPreference cmdlet to prevent Windows Defender from automatically sending files to Microsoft for analysis.

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • 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 v16

Tasks