General

  • Target
    XClient.exe
  • Size 30KB
  • Sample260517-1mappads8s
  • SHA256 1a5c3e7ee2b9577f64e6f8230872945814dc4eba01b11d175909c37fabe931ca
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • xworm

Version
  • 3.0

C2
  • 27.tcp.cpolar.top:13256

Mutex
  • L0NNBCvjhBFEkp3W

Attributes
  • install_file

    USB.exe

aes.plain

Targets

    • Target
      XClient.exe
    • Size 30KB
    • SHA256 1a5c3e7ee2b9577f64e6f8230872945814dc4eba01b11d175909c37fabe931ca
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detect Xworm Payload

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

    • Looks for VirtualBox Guest Additions in registry

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • 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 v16

Tasks