General

  • Target
    SolaraB.rar
  • Size 76KB
  • Sample240704-rtb2nazeqc
  • SHA256 c8615f0c7412de9bab6307491a5084aed1faf308664bc4d21e8d83101afdeb0a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • umbral

C2
  • https://discord.com/api/webhooks/1258158330237423708/TP4vZ1k1Rh4BbYP62cogAVNmLUNicORrL9xsgCelKxJelwVrWSmY1bVmhh1Yvxap5YQ-

Targets

    • Target
      SolaraB/Solara/solarabootstrapper.exe
    • Size 227KB
    • SHA256 bccba62c31f689715d01f4e80edbe2fe6a816edb571c4a409fccbe2d5b789b65
    • MD5 SHA1 SHA512 SSDEEP
    • Detect Umbral payload

    • Umbral

      Umbral stealer is an opensource moduler 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.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • 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