General

  • Target

    6e8e023faa33f0a5bfaa25e6fee9162a743d13f75adf33a02d8b3bf2447d6785.doc

  • Size

    118KB

  • Sample

    240221-d5q33aag4s

  • MD5

    d339effa7d6d418a9d7bdea6645bdd54

  • SHA1

    74a992d34613ab1373e2c758688e832849a73352

  • SHA256

    6e8e023faa33f0a5bfaa25e6fee9162a743d13f75adf33a02d8b3bf2447d6785

  • SHA512

    f41c5346593b213d649c2eb9ef837f6334f556646032bd8f003fa5ae8cdfdd1b71a82d7b1509dbd477f0dc7e253cd3390fe679ff90c333497beeb1fdda6d35ed

  • SSDEEP

    768:1wAbZSibMX9gRWjtwAbZSibMX9gRWjtwAbZSibMX9gRWj09fl/XB1J/Q+oxPIqbL:1wAlRkwAlRkwAlR5fl/XB1J/QdRPNL

Malware Config

Extracted

Family

remcos

Botnet

DOC

C2

72.11.158.94:1604

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    vsystems.exe

  • copy_folder

    vsystems

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-A3S4HC

  • 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

      6e8e023faa33f0a5bfaa25e6fee9162a743d13f75adf33a02d8b3bf2447d6785.doc

    • Size

      118KB

    • MD5

      d339effa7d6d418a9d7bdea6645bdd54

    • SHA1

      74a992d34613ab1373e2c758688e832849a73352

    • SHA256

      6e8e023faa33f0a5bfaa25e6fee9162a743d13f75adf33a02d8b3bf2447d6785

    • SHA512

      f41c5346593b213d649c2eb9ef837f6334f556646032bd8f003fa5ae8cdfdd1b71a82d7b1509dbd477f0dc7e253cd3390fe679ff90c333497beeb1fdda6d35ed

    • SSDEEP

      768:1wAbZSibMX9gRWjtwAbZSibMX9gRWjtwAbZSibMX9gRWj09fl/XB1J/Q+oxPIqbL:1wAlRkwAlRkwAlR5fl/XB1J/QdRPNL

    • Remcos

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

    • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

    • Detects executables built or packed with MPress PE compressor

    • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

    • Detects executables referencing many email and collaboration clients. Observed in information stealers

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Nirsoft

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • 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 SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks