General

  • Target

    https://www.mediafire.com/file/kulntv7zouhbjni/visatool.rar/file

  • Sample

    241208-2wrj8svrdx

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1277999854974406696/E5jlpnaIaqj10n4mF186OXvssQJ6CXTDRHNJhNMj8V-2ZrtkJ672_8Ob61NpRqQHxlG9

Targets

    • Target

      https://www.mediafire.com/file/kulntv7zouhbjni/visatool.rar/file

    • Detect Umbral payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Umbral family

    • 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

    • Executes dropped EXE

    • 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