General

  • Target

    https://cdn.discordapp.com/attachments/1162528692199760003/1170231677122002954/Generator_For_evrything.exe?ex=65584a2d&is=6545d52d&hm=f33bc8b1f1cc533cfdd17aa3259f0d5f5c10af7db32b4a92df10012c98b6c252&

  • Sample

    231104-f3d2tscf31

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1168013009873014824/PeLMu06lSpxirxupjlOHtuMtDLUJuyAIuSnIU6YUE-0FoT6J7y8XrmENWe2xoplSJo2R

Targets

    • Target

      https://cdn.discordapp.com/attachments/1162528692199760003/1170231677122002954/Generator_For_evrything.exe?ex=65584a2d&is=6545d52d&hm=f33bc8b1f1cc533cfdd17aa3259f0d5f5c10af7db32b4a92df10012c98b6c252&

    • Detect Umbral payload

    • Umbral

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

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • 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