General

  • Target

    Umbral.exe

  • Size

    231KB

  • Sample

    240917-x1vegazglp

  • MD5

    46bbe6bc5429714093c47fd3ab01c078

  • SHA1

    67507abcd9e1be3b86b0efb57b60266ac609481f

  • SHA256

    63d3d7fa239794ce2b47c70445eee9cb6549fde64dea4185f17df6ace12d1c4a

  • SHA512

    2e0ce4935cb658e3dadc78bc2d5ce779e4d9f9be491d3b09436bf16de74ab42beb5b41adaf3f9f1ae5c918e16d5f90428ab269cb78fb8df00bdae666e8e9f56a

  • SSDEEP

    6144:RloZM9rIkd8g+EtXHkv/iD4r6lHLxCqVAQhTuOL4lb8e1m5Mhi:joZOL+EP8r6lHLxCqVAQhTuOLEI

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1285680129904742451/6y1w---_qwoRWgXR29sNLoYAVVlnQIISb4eKeu8IQtwQsDUqaicf2Yzj053g0NvJ2TEb

Targets

    • Target

      Umbral.exe

    • Size

      231KB

    • MD5

      46bbe6bc5429714093c47fd3ab01c078

    • SHA1

      67507abcd9e1be3b86b0efb57b60266ac609481f

    • SHA256

      63d3d7fa239794ce2b47c70445eee9cb6549fde64dea4185f17df6ace12d1c4a

    • SHA512

      2e0ce4935cb658e3dadc78bc2d5ce779e4d9f9be491d3b09436bf16de74ab42beb5b41adaf3f9f1ae5c918e16d5f90428ab269cb78fb8df00bdae666e8e9f56a

    • SSDEEP

      6144:RloZM9rIkd8g+EtXHkv/iD4r6lHLxCqVAQhTuOL4lb8e1m5Mhi:joZOL+EP8r6lHLxCqVAQhTuOLEI

    • Detect Umbral payload

    • Umbral

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

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • 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