User tags

Assigned on submission by the user, not by sandbox detections.

Threatview.io Proactive Hunter

General

  • Target
    krummy-lavacrypt-gfhd.exe
  • Size 3.5MB
  • Sample240425-gf2eaagc53
  • SHA256 28b7e5568fcbab776e1bbb1be485a4299a760240fe4b1c60cb3ce68a0e0c4ba6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Slave

C2
  • 157.20.182.46:4782

Mutex
  • a5764ae9-1c39-4533-95ca-a5d90dae860a

Attributes
  • encryption_key

    BA20F732417E96C201B42F315FAD6CF773D77589

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Client

  • subdirectory

    SubDir

Targets

    • Target
      krummy-lavacrypt-gfhd.exe
    • Size 3.5MB
    • SHA256 28b7e5568fcbab776e1bbb1be485a4299a760240fe4b1c60cb3ce68a0e0c4ba6
    • MD5 SHA1 SHA512 SSDEEP
    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • UAC bypass

    • Windows security bypass

    • Looks for VirtualBox Guest Additions in registry

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

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

    • Checks computer location settings

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

    • Executes dropped EXE

    • Windows security modification

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Maps connected drives based on registry

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks