General

  • Target
    WindowsOptimum_installer.exe
  • Size 39KB
  • Sample260809-r1eq5agn6v
  • SHA256 e6a01d1af2c068fa403578ca3ea4c57b2748717d6daada3f9cc561cede2c1155
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • xworm

Version
  • 5.0

C2
  • 0.tcp.ngrok.io:28676

Mutex
  • dZAiTvJBc0j8c3NR

Attributes
  • Install_directory

    %AppData%

  • install_file

    USB.exe

aes.plain

Targets

    • Target
      WindowsOptimum_installer.exe
    • Size 39KB
    • SHA256 e6a01d1af2c068fa403578ca3ea4c57b2748717d6daada3f9cc561cede2c1155
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detect Xworm Payload

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

    • Command and Scripting Interpreter: PowerShell

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

    • Checks computer location settings

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

    • Creates a file in the Startup directory

      A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

    • Executes dropped EXE

    • Adds Run key to start application

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

MITRE ATT&CK Enterprise v16

Tasks