General

  • Target
    4e24fdbec5a768f78ad89177e71c4846.exe
  • Size 3.7MB
  • Sample240611-sx2bdssdkl
  • SHA256 fdef3bd7f14535f73bfcbe2741792c3c2c9cd10af69be1bd1bc1c41d5daeb71c
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • xworm

Version
  • 5.0

C2
  • 127.0.0.1:50230

  • letter-takes.gl.at.ply.gg:50230

Mutex
  • ke4QYmw58n6HyeTA

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

aes.plain

Targets

    • Target
      4e24fdbec5a768f78ad89177e71c4846.exe
    • Size 3.7MB
    • SHA256 fdef3bd7f14535f73bfcbe2741792c3c2c9cd10af69be1bd1bc1c41d5daeb71c
    • MD5 SHA1 SHA512 SSDEEP
    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Detect Xworm Payload

    • Modifies WinLogon for persistence

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • UAC bypass

    • Xworm

      Xworm is a remote access trojan written in C#.

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Disables Task Manager via registry modification

    • 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

    • Checks whether UAC is enabled

MITRE ATT&CK Enterprise v15

Tasks