General

  • Target

    Orcus.exe

  • Size

    3.0MB

  • Sample

    241028-krew7svhkn

  • MD5

    37128f8c34f0e2112cb6c60d2fe8d4c6

  • SHA1

    42d4240892b4fcb2b5332fb70210238aa4070f6a

  • SHA256

    8667faa80b6d3e4126e5e9e60b6e2f755f5388c5554e7b6fd59bcd5a342326ad

  • SHA512

    f0387c7f8d4d74fc378599918cee295abf14e0cc3983a4e1681a7d40ba4b5af519a0bfec7244d2e081588590e421711dc412b3e32cb17c0a6b9db9a0d0656b88

  • SSDEEP

    49152:uBpEKO3T5adZKM0sz5otCeEvsDKx+msbfGGW8wlBKJwAypQxbxEo9JnCmmLNrZEu:uBptODUKTslWp2MpbfGGilIJPypSbxEt

Malware Config

Extracted

Family

orcus

Botnet

Roblox

C2

89.23.100.155:1337

Mutex

fa9ce586702b4090bcb834980fda0474

Attributes
  • autostart_method

    Registry

  • enable_keylogger

    true

  • install_path

    %programfiles%\Windows\MpDefenderCore.exe

  • reconnect_delay

    10000

  • registry_keyname

    MpDefender

  • taskscheduler_taskname

    MpDefender

  • watchdog_path

    AppData\xdwdwatchdog.exe

Targets

    • Target

      Orcus.exe

    • Size

      3.0MB

    • MD5

      37128f8c34f0e2112cb6c60d2fe8d4c6

    • SHA1

      42d4240892b4fcb2b5332fb70210238aa4070f6a

    • SHA256

      8667faa80b6d3e4126e5e9e60b6e2f755f5388c5554e7b6fd59bcd5a342326ad

    • SHA512

      f0387c7f8d4d74fc378599918cee295abf14e0cc3983a4e1681a7d40ba4b5af519a0bfec7244d2e081588590e421711dc412b3e32cb17c0a6b9db9a0d0656b88

    • SSDEEP

      49152:uBpEKO3T5adZKM0sz5otCeEvsDKx+msbfGGW8wlBKJwAypQxbxEo9JnCmmLNrZEu:uBptODUKTslWp2MpbfGGilIJPypSbxEt

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Modifies Windows Defender Real-time Protection settings

    • Orcus

      Orcus is a Remote Access Trojan that is being sold on underground forums.

    • Orcus family

    • Orcus main payload

    • UAC bypass

    • Orcurs Rat Executable

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Windows security modification

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Hijack Execution Flow: Executable Installer File Permissions Weakness

      Possible Turn off User Account Control's privilege elevation for standard users.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks