General

  • Target

    66ef2d1d3aabff55217dda6c03b1867a7ca8adaad5fc1b01d6e058651b450d62

  • Size

    227KB

  • Sample

    250207-betedsvlep

  • MD5

    87d805618091e568a056c988e2c26cfa

  • SHA1

    aedfd6340df353946e6a6b0be5b0f02c3bc69bd2

  • SHA256

    66ef2d1d3aabff55217dda6c03b1867a7ca8adaad5fc1b01d6e058651b450d62

  • SHA512

    cace3d172fe91b7a971b5fdd64173fdc7a71ce8ca44b4af89a5ce1db9076e9e36614a3fa98305605f593ebcacc27aa0cb8b076a033f0693a5c7b93d0a98c255a

  • SSDEEP

    6144:+loZM+rIkd8g+EtXHkv/iD4ZCaClZ8e1mU0o2i:ooZtL+EP8wDD0G

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1334839913887039558/8n5-syCAVJvG5FhLtql3iCMklZiY9EDjOCye4f0kwVlW2D4fgZ2AlaEnSjTvodG7yJG0

Targets

    • Target

      66ef2d1d3aabff55217dda6c03b1867a7ca8adaad5fc1b01d6e058651b450d62

    • Size

      227KB

    • MD5

      87d805618091e568a056c988e2c26cfa

    • SHA1

      aedfd6340df353946e6a6b0be5b0f02c3bc69bd2

    • SHA256

      66ef2d1d3aabff55217dda6c03b1867a7ca8adaad5fc1b01d6e058651b450d62

    • SHA512

      cace3d172fe91b7a971b5fdd64173fdc7a71ce8ca44b4af89a5ce1db9076e9e36614a3fa98305605f593ebcacc27aa0cb8b076a033f0693a5c7b93d0a98c255a

    • SSDEEP

      6144:+loZM+rIkd8g+EtXHkv/iD4ZCaClZ8e1mU0o2i:ooZtL+EP8wDD0G

    • Detect Umbral payload

    • Umbral

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

    • Umbral family

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • 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

    • Deletes itself

    • 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