General

  • Target
    c14499b5d4fd1c8cbceedc07e49cd8f55184d64fe234c6eebcb29d60f414e6b6.bin
  • Size 3.0MB
  • Sample260805-bnvzkshj7s
  • SHA256 c14499b5d4fd1c8cbceedc07e49cd8f55184d64fe234c6eebcb29d60f414e6b6
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • umbral

Version
  • v1.0

C2
  • https://discord.com/api/webhooks/1526569383747522752/gIR2WsyeHvMQAQZAVmPPyZwAtqaF3PdeKMNMbcDi1P6fWVk2Cr69WYtztTwqcUwzKSQF

Extracted

Family
  • xworm

Version
  • 5.0

C2
  • xXxaa-55919.portmap.host:55919

Mutex
  • LO6c0yK0D4n79XOp

Attributes
  • install_file

    USB.exe

aes.plain

Targets

    • Target
      c14499b5d4fd1c8cbceedc07e49cd8f55184d64fe234c6eebcb29d60f414e6b6.bin
    • Size 3.0MB
    • SHA256 c14499b5d4fd1c8cbceedc07e49cd8f55184d64fe234c6eebcb29d60f414e6b6
    • 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.

    • 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