General

  • Target

    http://213.136.90.188:8081/

  • Sample

    241226-pwet8awjby

Malware Config

Extracted

Family

asyncrat

Version

Tsurugi RATs

Botnet

Default

C2

213.136.90.188:4449

Mutex

zteprqyjlfgxrxuaid

Attributes
  • delay

    1

  • install

    true

  • install_file

    Check Windows Update.exe

  • install_folder

    %AppData%

aes.plain

Extracted

Family

xworm

C2

213.136.90.188:7000

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    Microsoft Edgs.exe

Targets

    • AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

    • Asyncrat family

    • Contains code to disable Windows Defender

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

    • Detect Xworm Payload

    • Modifies Windows Defender Real-time Protection settings

    • Modifies Windows Defender notification settings

    • StormKitty

      StormKitty is an open source info stealer written in C#.

    • StormKitty payload

    • Stormkitty family

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • UAC bypass

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • Async RAT payload

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • 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.

    • Checks whether UAC is enabled

    • Command and Scripting Interpreter: PowerShell

      Start PowerShell.

MITRE ATT&CK Enterprise v15

Tasks