General

  • Target

    Umbral.exe

  • Size

    229KB

  • Sample

    240623-rn92haxfjq

  • MD5

    258ee0671cfbdfc017c50b7bb77b965f

  • SHA1

    aa7a991a81bff5d276525ca1224dc24f4e497168

  • SHA256

    185cff1b051d1389bc9cc2c50a4988e32f78f476696f61a0ae6fcd0bc33628af

  • SHA512

    9243436b0a880f85fed7f1e9cc9f1b624e62a500574ebcf92a2b8b20a256cd4961623b9731ea94532031023e164ab509569119f043d9e4559f1bee7851eddabc

  • SSDEEP

    6144:tloZMLrIkd8g+EtXHkv/iD446LAS3tW+xukt/qqfrwb8e1mai:voZ0L+EP8/LAS3tW+xukt/qqfsY

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1254439863764258868/Kbm1jabUQG6PkrHnu5QVqs2RvZi5ZQRuTb7ilsDK0o5Ii-ks8YHzjUSo-XH7hXzWOndY

Targets

    • Target

      Umbral.exe

    • Size

      229KB

    • MD5

      258ee0671cfbdfc017c50b7bb77b965f

    • SHA1

      aa7a991a81bff5d276525ca1224dc24f4e497168

    • SHA256

      185cff1b051d1389bc9cc2c50a4988e32f78f476696f61a0ae6fcd0bc33628af

    • SHA512

      9243436b0a880f85fed7f1e9cc9f1b624e62a500574ebcf92a2b8b20a256cd4961623b9731ea94532031023e164ab509569119f043d9e4559f1bee7851eddabc

    • SSDEEP

      6144:tloZMLrIkd8g+EtXHkv/iD446LAS3tW+xukt/qqfrwb8e1mai:voZ0L+EP8/LAS3tW+xukt/qqfsY

    • 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.

    • Drops file in Drivers directory

    • 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