General

  • Target
    https://gofile.io/d/8apO30NG
  • Sample261024-29sdpaex5k

Malware Config

Extracted

Family
  • neptunerat

C2
  • 5.tcp.cpolar.cn:11548

Attributes
  • filename

    USB.exe

  • group

    MasonGroup

  • key

    ofpfIrgRHfAb7CTj

  • rat_name

    MasonRAT

Extracted

Family
  • xworm

Version
  • 5.0

Mutex
  • fbv7eVrEAU497f1Y

Attributes
  • install_file

    USB.exe

  • localhost

    127.0.0.1

aes.plain

Targets

    • Detect Xworm Payload

    • Detects NeptuneRAT stealer

    • Family: NeptuneRAT, MasonRAT

      NeptuneRAT aka MasonRAT is a trojan written in C#.

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Uses the VBS compiler for execution

    • Adds Run key to start application

    • 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.

    • Drops file in System32 directory

    • Sets desktop wallpaper using registry

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v16

Tasks