General

  • Target

    8d053f5224f1e9023174aff9c4a30930N.exe

  • Size

    1.1MB

  • Sample

    240718-kb1hzatdre

  • MD5

    8d053f5224f1e9023174aff9c4a30930

  • SHA1

    4780b25f7cde7d9e88d437fc749009471df400c7

  • SHA256

    bf071edf3408e6496ce99865ad5503b710a6f02eba715f3a8ff471672c600e98

  • SHA512

    f065df05bb2057c271fdcc076c29a2dd5bacdade2e1540383d74229b36a4ef9ecd527fe582227055b9aabb79bcc05ee1ed3326ef253c5b79deb0fa92c236007c

  • SSDEEP

    24576:faHMv6CorjSnypQDaG9u1WTI8SvtsyVtG1TOMdRYqcBO:f1vOjlpQDaGjVc

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1260648854106279966/keEurbS-DAu9o9HNLNkSZdNBwk9KX-R3JUCBdBHxavFpGd9oS74vrFD6KpTlKwSh5bvL

Targets

    • Target

      8d053f5224f1e9023174aff9c4a30930N.exe

    • Size

      1.1MB

    • MD5

      8d053f5224f1e9023174aff9c4a30930

    • SHA1

      4780b25f7cde7d9e88d437fc749009471df400c7

    • SHA256

      bf071edf3408e6496ce99865ad5503b710a6f02eba715f3a8ff471672c600e98

    • SHA512

      f065df05bb2057c271fdcc076c29a2dd5bacdade2e1540383d74229b36a4ef9ecd527fe582227055b9aabb79bcc05ee1ed3326ef253c5b79deb0fa92c236007c

    • SSDEEP

      24576:faHMv6CorjSnypQDaG9u1WTI8SvtsyVtG1TOMdRYqcBO:f1vOjlpQDaGjVc

    • 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

    • Loads dropped DLL

    • 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.

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

MITRE ATT&CK Enterprise v15

Tasks