General

  • Target

    XClient.exe

  • Size

    63KB

  • Sample

    240620-v1sjrstcjq

  • MD5

    5a5dbeea50546b1e505b3e8239f07b01

  • SHA1

    0599b18235e0ad9b3e0ffa95a87f72790d969860

  • SHA256

    9db86ea3a8d0b4aceea7d5b1dd99799253faf620667af16e1d97608ee07ef8d4

  • SHA512

    571c940a4fee3b920891572d76fa9c181299d36f13bd532aa28ec5807584376d9be25fcf9290515494aeb79b4d907c062c39542799d6c33792d3b5d8e5711ba7

  • SSDEEP

    1536:qPO0c8aM/vwspHf3UZbLGSIvmokYX6XU0OCrvxWa4BeO:qPOW/vtsZbLNSz8U0OCrvxYeO

Malware Config

Extracted

Family

xworm

Version

3.0

C2

silver-bowl.gl.at.ply.gg:29206

Attributes
  • Install_directory

    %AppData%

  • install_file

    USB.exe

Targets

    • Target

      XClient.exe

    • Size

      63KB

    • MD5

      5a5dbeea50546b1e505b3e8239f07b01

    • SHA1

      0599b18235e0ad9b3e0ffa95a87f72790d969860

    • SHA256

      9db86ea3a8d0b4aceea7d5b1dd99799253faf620667af16e1d97608ee07ef8d4

    • SHA512

      571c940a4fee3b920891572d76fa9c181299d36f13bd532aa28ec5807584376d9be25fcf9290515494aeb79b4d907c062c39542799d6c33792d3b5d8e5711ba7

    • SSDEEP

      1536:qPO0c8aM/vwspHf3UZbLGSIvmokYX6XU0OCrvxWa4BeO:qPOW/vtsZbLNSz8U0OCrvxYeO

    • Detect Xworm Payload

    • 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.

    • Drops startup file

    • Executes dropped EXE

    • UPX packed file

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

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

MITRE ATT&CK Enterprise v15

Tasks