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General

  • Target

    Steam.exe

  • Size

    51KB

  • Sample

    240808-l4e86sscjk

  • MD5

    eb794f3819b32c9fbc747309bb04cd68

  • SHA1

    a6c24bfb6c2ea4cdf10f0f54c0a4e8ac0380beb3

  • SHA256

    e8fd34b40b83391a855905620e4beeb153d256df196b063bc7845d747f1e7d67

  • SHA512

    0b6cf31c799513b4e0f5ac21180cc7a26451fc54504f03ace353a5a8c598885c594b3375e990ac442e08ffaa1f3e9692cbf6dfb8c035b4380497cefd57288aaf

  • SSDEEP

    768:juMMmVn76G3rspEacCIQgttZX+2V2ltnq7oTmggkbm1t+tuXSWCalOIhu//t/:SMDnv7sKEIHLXyBqCmjkbmn/weOImF/

Malware Config

Extracted

Family

xworm

C2

tree-cleaning.gl.at.ply.gg:33027

hard-tyler.gl.at.ply.gg:27490

Attributes
  • install_file

    USB.exe

Targets

    • Target

      Steam.exe

    • Size

      51KB

    • MD5

      eb794f3819b32c9fbc747309bb04cd68

    • SHA1

      a6c24bfb6c2ea4cdf10f0f54c0a4e8ac0380beb3

    • SHA256

      e8fd34b40b83391a855905620e4beeb153d256df196b063bc7845d747f1e7d67

    • SHA512

      0b6cf31c799513b4e0f5ac21180cc7a26451fc54504f03ace353a5a8c598885c594b3375e990ac442e08ffaa1f3e9692cbf6dfb8c035b4380497cefd57288aaf

    • SSDEEP

      768:juMMmVn76G3rspEacCIQgttZX+2V2ltnq7oTmggkbm1t+tuXSWCalOIhu//t/:SMDnv7sKEIHLXyBqCmjkbmn/weOImF/

    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Blocklisted process makes network request

    • 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.

    • Drops startup file

    • Executes dropped EXE

    • Adds Run key to start application

    • 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 v15

Tasks