General

  • Target

    file.exe

  • Size

    516KB

  • Sample

    241002-qqm43sybll

  • MD5

    b60c1b642765e2156730e910dbbed55a

  • SHA1

    e0bc18e19d753f1a09611416c8fea46d3453aac7

  • SHA256

    4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1

  • SHA512

    f9bca6ca4cf5f5f06faf58afa65e16897eabe40f981508d6225880d94a629675c834159a31cfaad28bf04003b949d8b054e5b8194b1211f8dc9cdfb9274f21d2

  • SSDEEP

    12288:7813Q9hg+AKfsc/5a+NCGO1UA/DEkINz3WSV/:78lQ96+YcAvwygNz31

Malware Config

Extracted

Family

remcos

Botnet

Rem_doc2

C2

107.173.4.16:2404

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-DSGECX

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      file.exe

    • Size

      516KB

    • MD5

      b60c1b642765e2156730e910dbbed55a

    • SHA1

      e0bc18e19d753f1a09611416c8fea46d3453aac7

    • SHA256

      4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1

    • SHA512

      f9bca6ca4cf5f5f06faf58afa65e16897eabe40f981508d6225880d94a629675c834159a31cfaad28bf04003b949d8b054e5b8194b1211f8dc9cdfb9274f21d2

    • SSDEEP

      12288:7813Q9hg+AKfsc/5a+NCGO1UA/DEkINz3WSV/:78lQ96+YcAvwygNz31

    • Remcos

      Remcos is a closed-source remote control and surveillance software.

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • 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.

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

    • Target

      $WINDIR/compromis/overcheaply.Dum

    • Size

      54KB

    • MD5

      5700ab6572287746a87ecdba691baf79

    • SHA1

      5885062f3e65fe332bcf2077bc25323139e60b18

    • SHA256

      e3916adcdcff1f166a6bcd0487b2d725131d275190459841dcd77d869e8f707a

    • SHA512

      7a95bb5aee211653b556da9416709d418c77600c561ed7b5af11b559d5052170b2c93ef8e1c70e14536da01b6ac050f5feba81d04784f232cf54ad92db70b106

    • SSDEEP

      1536:wdIUK0a2UebWv67ZY3xMxevI7EtHVO3ojPoTtnVnkC:wdIU1Edv67G3x2XEtH03SPytZ

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Enumerates connected drives

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

MITRE ATT&CK Enterprise v15

Tasks