General

  • Target

    Oski Cracked.exe

  • Size

    4.7MB

  • Sample

    240511-pz49aage6t

  • MD5

    fae4c2fc795b054c80d57ad600f8447f

  • SHA1

    94ef84328a4c1c864307870d8e98cc4b6d334dd5

  • SHA256

    579e9d2e534610d36fa6073b825f8caffc41f1f20dad0cfd1749ca12d202a11c

  • SHA512

    35da6d3abc97cea70fb573d45f5bd528f5550d478a464f40dd1455f453c65a16283d3a5106aa9e488d3674db5d0ec7009a0cfd30d026afc4220e829f32075be9

  • SSDEEP

    98304:PahEJCbuSMburCaMZh0yEKj+WRvrY1dcZ048HV/bFy8jJ7LUdVmi:PahmmMbuQZlFY7KsZPNLUdQ

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Windows Security

C2

23.105.131.187:7812

Mutex

VNM_MUTEX_CXpgUhDot7jvhF7S9O

Attributes
  • encryption_key

    1mVKopYcKhmQLOzLUk5T

  • install_name

    Windows Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Update Service

  • subdirectory

    SubDir

Targets

    • Target

      Oski Cracked.exe

    • Size

      4.7MB

    • MD5

      fae4c2fc795b054c80d57ad600f8447f

    • SHA1

      94ef84328a4c1c864307870d8e98cc4b6d334dd5

    • SHA256

      579e9d2e534610d36fa6073b825f8caffc41f1f20dad0cfd1749ca12d202a11c

    • SHA512

      35da6d3abc97cea70fb573d45f5bd528f5550d478a464f40dd1455f453c65a16283d3a5106aa9e488d3674db5d0ec7009a0cfd30d026afc4220e829f32075be9

    • SSDEEP

      98304:PahEJCbuSMburCaMZh0yEKj+WRvrY1dcZ048HV/bFy8jJ7LUdVmi:PahmmMbuQZlFY7KsZPNLUdQ

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Modifies Windows Defender Real-time Protection settings

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • VenomRAT

      VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

    • 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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks