Extracted

Extracted

• • Target

    MasonClient.exe

  • Size

    154KB

  • MD5

    7d808e886ceceac50433176d38872344

  • SHA1

    5c94426cb6e7cd3351b6864b7a92b651bcaaec5b

  • SHA256

    5b653d9ea95075ea952b923d37e91be40839557f4cf8b2377514ddf9b87de3e8

  • SHA512

    f4c1efc58ce8a4bc7d9e2eb5ec93892943cc718e825fc7094599ead926c9e95c2e8aafe3f0c0892c06792394a9664ad5370714b5a0f03ee1508ab1bceec0fecb

  • SSDEEP

    3072:Zhh64XFzyb0S/XbOJzOOOOOOOHOOOOOOO/OOOOOOOp:rXXAbyOOOOOOOHOOOOOOO/OOOOOOO

  Score

  10^/10

  xwormexecutionrattrojanbootkitdefense_evasionpersistence

  • Detect Xworm Payload

  • Suspicious use of NtCreateUserProcessOtherParentProcess

  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm

  • Xworm family

    xworm

  • Blocklisted process makes network request

  • Command and Scripting Interpreter: PowerShell

    Run Powershell and hide display window.

    execution

  • Downloads MZ/PE file

  • 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

  • Enumerates connected drives

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

  • Legitimate hosting services abused for malware hosting/C2

  • 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