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General

  • Target

    Runtime Broker.exe

  • Size

    73KB

  • Sample

    250309-lyl5jazmw7

  • MD5

    7a5408d9535b2e5db8d194f4d8b93c23

  • SHA1

    c8c6caf9f750b4bc756b40c41f00c3ed3af7fbeb

  • SHA256

    23ecee99ee4ab7a150f91d4202033a6629cf5af74d80b6a12c2396f1f775734f

  • SHA512

    95ef1bdb1e56b3d9c6809586ea0d8ff197375584f8625748811dceb4783fb693749b49c3ed0890c23782946acec3ba5baadcf49735a87985e30f14081a365fd8

  • SSDEEP

    1536:Jb2yCofWhUvuJJH9o2qMnfAQPJwz7opMfQxnbSUyJhb/KpKU+k6eeOJ5w0pIBAM:nWhUvuJB9o2qMnfAQPJKy1jyJhb/KHhO

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    USB.exe

  • pastebin_url

    https://pastebin.com/raw/DSFaHH8B

Targets

    • Target

      Runtime Broker.exe

    • Size

      73KB

    • MD5

      7a5408d9535b2e5db8d194f4d8b93c23

    • SHA1

      c8c6caf9f750b4bc756b40c41f00c3ed3af7fbeb

    • SHA256

      23ecee99ee4ab7a150f91d4202033a6629cf5af74d80b6a12c2396f1f775734f

    • SHA512

      95ef1bdb1e56b3d9c6809586ea0d8ff197375584f8625748811dceb4783fb693749b49c3ed0890c23782946acec3ba5baadcf49735a87985e30f14081a365fd8

    • SSDEEP

      1536:Jb2yCofWhUvuJJH9o2qMnfAQPJwz7opMfQxnbSUyJhb/KpKU+k6eeOJ5w0pIBAM:nWhUvuJB9o2qMnfAQPJKy1jyJhb/KHhO

    • Detect Xworm Payload

    • 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.

    • Checks computer location settings

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

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

MITRE ATT&CK Enterprise v15

Tasks