Resubmissions

10-03-2024 12:19

240310-pha9wace35 6

10-03-2024 11:02

240310-m5ff1abb32 10

General

  • Target

    https://drive.google.com/file/d/16MwbENvB3elvioZTAxL9nhwq3TuAOKqn/view

  • Sample

    240310-m5ff1abb32

Malware Config

Targets

    • Target

      https://drive.google.com/file/d/16MwbENvB3elvioZTAxL9nhwq3TuAOKqn/view

    • Detect Umbral payload

    • Umbral

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

    • Downloads MZ/PE file

    • Modifies Windows Firewall

    • Sets file execution options in registry

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Registers COM server for autorun

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Legitimate hosting services abused for malware hosting/C2

    • Checks system information in the registry

      System information is often read in order to detect sandboxing environments.

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks