General

  • Target

    https://oxy.st/d/koRh

  • Sample

    240522-scgq9afb77

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %AppData%

  • install_file

    Microsoft_WindowsDefender.exe

  • pastebin_url

    https://pastebin.com/raw/dxKNAdeE

  • telegram

    https://api.telegram.org/bot7013809678:AAEFwh-OW3w4YnEldOGR6NvGudG5gj8iF0Q/sendMessage?chat_id=5073217277

Targets

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Detect Xworm Payload

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Xworm

      Xworm is a remote access trojan written in C#.

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Creates new service(s)

    • Stops running service(s)

    • Checks computer location settings

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

    • Drops startup file

    • 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.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • 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.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks