Extracted

• • Target

    MasonRootkit.exe

  • Size

    231KB

  • MD5

    265b52aa4d100784d7cd39258d5e4d21

  • SHA1

    5b708da62d55364477ffb77e7feb4193f4635f92

  • SHA256

    9d08e5e62b409ef1ccd05c7996eb5432e4a36f55642cb7441d153909e823f144

  • SHA512

    4ce9e2c41b65ce3c108765dcd934e0f2a12f6c9640cb2ae547997b26a66da1d515ea7bfeb9cc529a57fbd41f51d61068ca7b9f551119e1403ff0cf1b5684e661

  • SSDEEP

    3072:AvNYkHFE9jZOjT4LD8KbgVtn8Mo8G1gVziHzZbIK1YKB/pCAcNqXhwBV3yxSQigS:srE9Z/5bTgVziHzZnSKrCbYMJZbe8tq

  Score

  10^/10

  xwormdefense_evasionrattrojanbootkitpersistence

  • Detect Xworm Payload

  • Modifies security service

    defense_evasion

  • Suspicious use of NtCreateProcessExOtherParentProcess

  • 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.

  • Executes dropped EXE

  • Indicator Removal: Clear Windows Event Logs

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

    defense_evasion

  • Loads dropped DLL

  • 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

  behavioral1behavioral2