General

  • Target
    TR Proforma Invoice.PDF.bat.exe
  • Size 1.6MB
  • Sample250729-sg4ftayqt2
  • SHA256 7399f5ec98154a41f61732a54737376b5043e82946a81a668e82a57359e4950c
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • xworm

C2
  • 45.93.8.241:6743

Attributes
  • install_file

    USB.exe

Extracted

Family
  • xworm

Version
  • XWorm V5.2

C2
  • 45.93.8.241:9352

Attributes
  • install_file

    USB.exe

Extracted

Family
  • quasar

Version
  • 1.5.1

Botnet
  • Office04

C2
  • 45.93.8.241:7895

Mutex
  • d0d91555-0a52-4b62-b913-ff4158f00972

Attributes
  • encryption_key

    69BAEF79BF5B173CF7B7998A09AE49179A931692

  • install_name

    Client.exe

  • key_salt

    5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Pulsar Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      TR Proforma Invoice.PDF.bat.exe
    • Size 1.6MB
    • SHA256 7399f5ec98154a41f61732a54737376b5043e82946a81a668e82a57359e4950c
    • MD5 SHA1 SHA512 SSDEEP
    • Detect Xworm Payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • XenArmor Suite

      XenArmor is as suite of password recovery tools for various application.

    • Xenarmor family

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • Command and Scripting Interpreter: PowerShell

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

    • ACProtect 1.3x - 1.4x DLL software

      Detects file using ACProtect software.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads local data of messenger clients

      Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Accesses Microsoft Outlook accounts

    • Suspicious use of SetThreadContext

    • UPX packed file

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

MITRE ATT&CK Enterprise v16

Tasks