General

  • Target
    booster v5.rar
  • Size 95KB
  • Sample260918-cj94dagf99
  • SHA256 2f56976dba3262f8d93b56d871c7b5e3bdaba02b5c1ee41ddf1bf29021f3ac51
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • umbral

Version
  • v1.3

C2
  • https://discord.com/api/webhooks/1546927688512438373/a41DUZGMMM9-2vRp1cGIPe0vm4CEO5lSNsqe-V32MZvySs_rQNhuhqHOmn9UB9KcKWo0

Targets

    • Target
      booster v5.rar
    • Size 95KB
    • SHA256 2f56976dba3262f8d93b56d871c7b5e3bdaba02b5c1ee41ddf1bf29021f3ac51
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    • Target
      booster v5/boost v5l.exe
    • Size 589KB
    • SHA256 52a857e9310a1350b2b9da7a7769cbccfdd007e56b2230f1cb0855066642625a
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects Umbral payload

    • Family: Umbral

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

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • 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

    • 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.

    • 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