Extracted

Extracted

• • Target

    Bootstrapper_v2,21.exe._.exe

  • Size

    3.5MB

  • MD5

    331b2ea924bbf9e736df0d7f346c7681

  • SHA1

    2e5842495b7ee2e2821d69910e1d0eb3c65ea5fb

  • SHA256

    9576143077300fa764d387afea25930bbfcc01bdb23a01dab704bc071fe4e8aa

  • SHA512

    b170708ee36fdd42464502640648bf76aee4c090088a16da9288bc2904c854350016341a9c4adb7d23608d12373c052c8ab1e82a740cd930aab72c3977731694

  • SSDEEP

    98304:2LwsX+LXl+Ah9AvIEQikn29ik5sY45yM4/fyxLXsccktwt:7nLX4AbcITipJ5145ygzs7Qi

  Score

  10^/10

  xwormbootkitdefense_evasionexecutionpersistencerattrojan

  • 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

  • Adds Run key to start application

    persistence

  • 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

  • Obfuscated Files or Information: Command Obfuscation

    Adversaries may obfuscate content during command execution to impede detection.

    defense_evasion

  • 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

  behavioral1