Resubmissions

06/01/2025, 12:11

250106-pcnm1swlfz

11/06/2024, 17:39

240611-v8d2cavepb10

General

  • Target
    Nexus Release.rar
  • Size 33.1MB
  • Sample240611-v8d2cavepb
  • SHA256 e6bd9b2b687e9a2381b43d1fabeca64e5ed727676b5b9470220252e4098a22b6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • xworm

C2
  • 91.92.241.69:5555

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    Windows Runtime.exe

Targets

    • Target
      Nexus Release.rar
    • Size 33.1MB
    • SHA256 e6bd9b2b687e9a2381b43d1fabeca64e5ed727676b5b9470220252e4098a22b6
    • MD5 SHA1 SHA512 SSDEEP
    • 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

    • Loads dropped DLL

    • 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.

    • Target
      Nexus Release/ByfronHook.dll
    • Size 21KB
    • SHA256 3811858da4b1f5e7f40d1237d7189ddca3989fa0d7b07e87c538f92975b893d2
    • MD5 SHA1 SHA512 SSDEEP
    Score
    1/10
    • Target
      Nexus Release/Nexus Release V1.5.exe
    • Size 33.1MB
    • SHA256 4763f3899de3f06d5598e165404dfb040d86961cb76c82fd153e9f8abff41712
    • MD5 SHA1 SHA512 SSDEEP
    • Detect Xworm Payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • 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.

    • Target
      Nexus Release/assets.dll
    • Size 171KB
    • SHA256 672cb16128dea50e21fd2d98889e2d6a2264b654304a3f4248ebdf4c546f734a
    • MD5 SHA1 SHA512 SSDEEP
    Score
    1/10
    • Target
      Nexus Release/instructions.txt
    • Size 350B
    • SHA256 1795b27a75858a67a0c93bce21b77d6fd89213079ce4bb8aa09b1cca99be5619
    • MD5 SHA1 SHA512
    Score
    1/10
    • Target
      Nexus Release/license.txt
    • Size 6KB
    • SHA256 a19d58aaab15c4d0019e569d1c073d1b5286fdd37dbeee7a58a7d1ae76045ae1
    • MD5 SHA1 SHA512 SSDEEP
    Score
    1/10

MITRE ATT&CK Enterprise v15

Tasks