General

  • Target
    open.cs
  • Size 1KB
  • Sample260710-g9818aex4m
  • SHA256 09be5c410052fc96ba5de93dae84afa4bd86f497fc5053ce078c95b07aa68d8f
  • MD5 SHA1 SHA512 TLSH

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://www.win-rar.com/fileadmin/winrar-versions/downloader/versions.xml

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://www.win-rar.com/fileadmin/winrar-versions/winrar/winrar-x64-723.exe

Extracted

Family
  • xworm

C2
  • 10.127.0.26:5552

Mutex
  • 9لmDHمtOاcاWHgاإEاisًyالScTلsX

Attributes
  • install_file

    USB.exe

aes.plain
aes.plain

Targets

    • Target
      open.cs
    • Size 1KB
    • SHA256 09be5c410052fc96ba5de93dae84afa4bd86f497fc5053ce078c95b07aa68d8f
    • MD5 SHA1 SHA512 TLSH
    • Detect Xworm Payload

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Uses the VBS compiler for execution

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Contacts third-party web service commonly abused for C2

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

    • Looks up external IP address via web service

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

MITRE ATT&CK Enterprise v16

Tasks