General

  • Target

    VenomServer.exe

  • Size

    229KB

  • Sample

    250115-chv8tsxjgx

  • MD5

    8592e87c9ce0b16668abffac801541f8

  • SHA1

    fd01f9543021891177b974b1f14f97ab332b2f7f

  • SHA256

    18d2df2e1cc1bd1e7192f036d0d3a2d1b0d9e9918982597fb7482b87f6cebfc7

  • SHA512

    2f817da7154f98dccf0f683245ad06d71f31bfcc77db707f195d229cb1834686ead2df96fb106701de4d4df0b365704d0370b88fce9471048a4b80f1d5ec9592

  • SSDEEP

    6144:tloZM+rIkd8g+EtXHkv/iD4qUWicCFdWNj+ctBI9Pb8e1mti:voZtL+EP8qUWicCFdWNj+ctBIB3

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1328209002764566561/UhpuEPgyDx2iFhVQ0LoUw03QEmTyLN2efT00m9vrUqo48i9qx3-bTXUFiMl2qSgxmsQp

Targets

    • Target

      VenomServer.exe

    • Size

      229KB

    • MD5

      8592e87c9ce0b16668abffac801541f8

    • SHA1

      fd01f9543021891177b974b1f14f97ab332b2f7f

    • SHA256

      18d2df2e1cc1bd1e7192f036d0d3a2d1b0d9e9918982597fb7482b87f6cebfc7

    • SHA512

      2f817da7154f98dccf0f683245ad06d71f31bfcc77db707f195d229cb1834686ead2df96fb106701de4d4df0b365704d0370b88fce9471048a4b80f1d5ec9592

    • SSDEEP

      6144:tloZM+rIkd8g+EtXHkv/iD4qUWicCFdWNj+ctBI9Pb8e1mti:voZtL+EP8qUWicCFdWNj+ctBIB3

    • Detect Umbral payload

    • Umbral

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

    • Umbral family

    • 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