Extracted

• • Target

    XClient66.exe

  • Size

    501KB

  • MD5

    51e015f908d007651a56ba603c142b12

  • SHA1

    8fe6b8e61426c8a49a778de6f18ce568d58f2a9d

  • SHA256

    a353bc34e2efa3ea7e4c04bb9d49c70ca45cdd151ed5519d946664b9c5c9282b

  • SHA512

    e598ed359d23173889046499c4093c739a80a044724aae16c4bb483311f0ad80357df7b7dd10f9a6cf12084a4009b18927adde3210ec6bebdf8dd57da997a9ad

  • SSDEEP

    12288:EItyU3DTkV1ilKya0FOUuQ0gH+kmtbF6W05EJXp107sd:RxkGTy

  Score

  10^/10

  xwormdefense_evasiondiscoveryexecutionrattrojanbootkitpersistence

  • Detect Xworm Payload

  • Modifies security service

    defense_evasion

  • Suspicious use of NtCreateUserProcessOtherParentProcess

  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm

  • Xworm family

    xworm

  • Sets service image path in registry

    persistence

  • 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.

  • Drops startup file

  • Executes dropped EXE

  • Indicator Removal: Clear Windows Event Logs

    Clear Windows Event Logs to hide the activity of an intrusion.

    defense_evasion

  • Adds Run key to start application

    persistence

  • Command and Scripting Interpreter: PowerShell

    Using powershell.exe command.

    execution

  • Enumerates connected drives

    Attempts to read the root path of hard drives other than the default C: drive.

  • Writes to the Master Boot Record (MBR)

    Bootkits write to the MBR to gain persistence at a level below the operating system.

    bootkitpersistence

  • Drops file in System32 directory

  • Suspicious use of SetThreadContext

  behavioral1behavioral2