General

  • Target

    resembleC2.exe

  • Size

    763KB

  • Sample

    250112-d2hyaawqbm

  • MD5

    f70fb0eacdba5672bd67ff9ad29e425b

  • SHA1

    35c7ad26473afb12c8b46dfb51f3e0d73b92a7eb

  • SHA256

    325ec7369a18af43c95815bacf830f5bcd1093436c25f67685226fe0d4812280

  • SHA512

    e93012796de946c4b009d9c68a539ea010d88952c11ddd0fc05d3d4ebe1657f16a7f75269e2c6075c12564f40752c7f4aec0c64583ffb46d06ec69431e5f6ff5

  • SSDEEP

    12288:wjB1GbyBRc8nAVCCpViLkSdIi/NvFFuHtHylX5mmYKlzQUG1R9qRst2hmKyL/mVD:wjB1myBRccwf/SdNFvFFu1yh5zlzY1RS

Malware Config

Extracted

Family

orcus

C2

9across-entitled.gl.at.ply.gg

Mutex

cac3aa9158e541b28ce1c4890a52661d

Attributes
  • administration_rights_required

    false

  • anti_debugger

    false

  • anti_tcp_analyzer

    false

  • antivm

    false

  • autostart_method

    1

  • change_creation_date

    false

  • force_installer_administrator_privileges

    false

  • hide_file

    false

  • install

    false

  • installation_folder

    %appdata%\Microsoft\Speech\AudioDriver.exe

  • installservice

    false

  • keylogger_enabled

    false

  • newcreationdate

    01/12/2025 04:15:11

  • plugins

    AgUFyfihswTdIPqEArukcmEdSF06Hw9CAFMAbwBEACAAUAByAG8AdABlAGMAdABpAG8AbgAHAzEALgAwAEEgNwBkAGUAYQAzAGQAZgBhAGUAZQBjAGEANABjADcAYQA5ADcAZABiAGYAZQBlADUAMQAyADIAMgA1ADYAMgA3AAEFl6aNkQPXkQKOmwKLvFcpr24sKCsVRABpAHMAYQBiAGwAZQAgAFcAZQBiAGMAYQBtACAATABpAGcAaAB0AHMABwMxAC4AMABBIGUANABhADUAZgAzADIANwAzADkANQBjADQAOQA5ADUAYgA3ADgAYQA1ADYAYwBhAGYAMwAzAGIANgAzADQANgABAAAEBA==

  • reconnect_delay

    10000

  • registry_autostart_keyname

    Audio HD Driver

  • registry_hidden_autostart

    false

  • set_admin_flag

    false

  • tasksch_name

    Audio HD Driver

  • tasksch_request_highest_privileges

    false

  • try_other_autostart_onfail

    false

aes.plain

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1326652489054818346/f_cBTMEYAkXYcTbEkW-MUwYrefMORTfuoofsZ5ymJ5yR8BQpohmaCuB-PwAuIP1xAUKw

Targets

    • Target

      resembleC2.exe

    • Size

      763KB

    • MD5

      f70fb0eacdba5672bd67ff9ad29e425b

    • SHA1

      35c7ad26473afb12c8b46dfb51f3e0d73b92a7eb

    • SHA256

      325ec7369a18af43c95815bacf830f5bcd1093436c25f67685226fe0d4812280

    • SHA512

      e93012796de946c4b009d9c68a539ea010d88952c11ddd0fc05d3d4ebe1657f16a7f75269e2c6075c12564f40752c7f4aec0c64583ffb46d06ec69431e5f6ff5

    • SSDEEP

      12288:wjB1GbyBRc8nAVCCpViLkSdIi/NvFFuHtHylX5mmYKlzQUG1R9qRst2hmKyL/mVD:wjB1myBRccwf/SdNFvFFu1yh5zlzY1RS

    • Detect Umbral payload

    • Orcus

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

    • Orcus family

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Umbral family

    • Command and Scripting Interpreter: PowerShell

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

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Drops file in Drivers directory

    • 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.

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • 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