General

  • Target

    5765545ccc1b99ac6ac37b2d6e2a8cbaf3e30f767b069620a734c3f8022db39c

  • Size

    4.0MB

  • Sample

    241208-vhhlvazkds

  • MD5

    8b0fa2f9a7d3822c44580a49dd546c97

  • SHA1

    e90ac8103e2877a3c607fd8e4bdcd4a132846015

  • SHA256

    5765545ccc1b99ac6ac37b2d6e2a8cbaf3e30f767b069620a734c3f8022db39c

  • SHA512

    2f168cfaf3cab1ab5cf274bc7983a64587fd26487fffa733393146e02ea609c0a0ed8f4527b58ad82416557afe91d1efa0b11afd35fbdfce7bc7a48a77c23680

  • SSDEEP

    98304:MANuSZTKA0t9FFPEE6zTOwlRVny+pnp4huLe1ypSb3o9JCm:/bk9fcHiwVyWRi1ypS6JC

Malware Config

Extracted

Family

orcus

C2

45.74.38.211:4782

Mutex

5473b263a5de48aaabfe373bccf83dd2

Attributes
  • autostart_method

    Disable

  • enable_keylogger

    false

  • install_path

    %programfiles%\Orcus\Orcus.exe

  • reconnect_delay

    10000

  • registry_keyname

    Orcus

  • taskscheduler_taskname

    Orcus

  • watchdog_path

    AppData\OrcusWatchdog.exe

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

https://exodus.lat/COMSurrogate.exe

Targets

    • Target

      5765545ccc1b99ac6ac37b2d6e2a8cbaf3e30f767b069620a734c3f8022db39c

    • Size

      4.0MB

    • MD5

      8b0fa2f9a7d3822c44580a49dd546c97

    • SHA1

      e90ac8103e2877a3c607fd8e4bdcd4a132846015

    • SHA256

      5765545ccc1b99ac6ac37b2d6e2a8cbaf3e30f767b069620a734c3f8022db39c

    • SHA512

      2f168cfaf3cab1ab5cf274bc7983a64587fd26487fffa733393146e02ea609c0a0ed8f4527b58ad82416557afe91d1efa0b11afd35fbdfce7bc7a48a77c23680

    • SSDEEP

      98304:MANuSZTKA0t9FFPEE6zTOwlRVny+pnp4huLe1ypSb3o9JCm:/bk9fcHiwVyWRi1ypS6JC

    • 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

    • TA505

      Cybercrime group active since 2015, responsible for families like Dridex and Locky.

    • Ta505 family

    • UAC bypass

    • XMRig Miner payload

    • Xmrig family

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • Orcurs Rat Executable

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Windows security modification

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • 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.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v15

Tasks