General

  • Target
    example_protected.exe
  • Size 1.8MB
  • Sample260304-jef33af12x
  • SHA256 4fb151010a77003ee52af0b25a3c609717c143294497752a8c59093e53bd68e8
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • xworm

Version
  • 3.1

C2
  • 84.181.175.173:4444

Attributes
  • Install_directory

    %AppData%

  • install_file

    USB.exe

Targets

    • Target
      example_protected.exe
    • Size 1.8MB
    • SHA256 4fb151010a77003ee52af0b25a3c609717c143294497752a8c59093e53bd68e8
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Command and Scripting Interpreter: PowerShell

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

    • Manipulates Digital Signatures

      Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to make their binary seem validly signed.

    • 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.

    • Drops startup file

    • Executes dropped EXE

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • 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 NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v16

Tasks