General

  • Target

    BL-Tools-v2.8.3.exe

  • Size

    6.4MB

  • Sample

    240715-gmeh4a1dnr

  • MD5

    3488ad52666afe9800364a9c34f9725d

  • SHA1

    3412ee1bb608e54b5c80c210432ca23c0c3dd766

  • SHA256

    aa23463d85a070a894711f628356694599b8eeca33e3e3dc161f2ef765932235

  • SHA512

    e5f42f9f71557720cb7072a37107be5224020dfa94a49a42a56107b0bd8be84aef28f9191705966861fdd6b7a50ff379c3fc36bd2f56e194142711fe9790d06a

  • SSDEEP

    196608:cLzA2rwXK0ARSWsQPQJvCvHm9EVi9RZckSIJH:0HkKvwxQjHmuiTZckS

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1252474399957848134/ilQm28lxIOrQeOQaL1rqkItSyclk6EIc_o-hRhExVNFtMZ2xF_oiylm7nsP-jUa248ZH

Targets

    • Target

      BL-Tools-v2.8.3.exe

    • Size

      6.4MB

    • MD5

      3488ad52666afe9800364a9c34f9725d

    • SHA1

      3412ee1bb608e54b5c80c210432ca23c0c3dd766

    • SHA256

      aa23463d85a070a894711f628356694599b8eeca33e3e3dc161f2ef765932235

    • SHA512

      e5f42f9f71557720cb7072a37107be5224020dfa94a49a42a56107b0bd8be84aef28f9191705966861fdd6b7a50ff379c3fc36bd2f56e194142711fe9790d06a

    • SSDEEP

      196608:cLzA2rwXK0ARSWsQPQJvCvHm9EVi9RZckSIJH:0HkKvwxQjHmuiTZckS

    • 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

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • 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.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks