General

  • Target

    3b278035106f92f49ae88b34c66465b0N.exe

  • Size

    2.0MB

  • Sample

    240827-jfhchszcjf

  • MD5

    3b278035106f92f49ae88b34c66465b0

  • SHA1

    9de381fe487e95bbd7ac92f324104f981f1bbda2

  • SHA256

    aa359936c83c8d6dd2c36284aadecdd90e4d7c97e06451fccd84ee87d50670e8

  • SHA512

    cb0f5e8817446969339fbd4afe70a8a07c8d2011e7734511163eadb9380d250a1f7a8158fd7596db61ef2ac2f86a72d4f5987900e93ee3e8d2d4196aae39ded2

  • SSDEEP

    24576:YD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPj8/j7otSSlFE///c:Yp7E+QrFUBgq2pHV

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

213.183.58.19:4000

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    true

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    true

  • keylog_file

    read.dat

  • keylog_flag

    false

  • keylog_folder

    CastC

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_sccafsoidz

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Extracted

Family

remcos

Botnet

Host

C2

213.183.58.19:4000

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    true

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    true

  • keylog_file

    read.dat

  • keylog_flag

    false

  • keylog_folder

    CastC

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_sccafsoidz

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target

      3b278035106f92f49ae88b34c66465b0N.exe

    • Size

      2.0MB

    • MD5

      3b278035106f92f49ae88b34c66465b0

    • SHA1

      9de381fe487e95bbd7ac92f324104f981f1bbda2

    • SHA256

      aa359936c83c8d6dd2c36284aadecdd90e4d7c97e06451fccd84ee87d50670e8

    • SHA512

      cb0f5e8817446969339fbd4afe70a8a07c8d2011e7734511163eadb9380d250a1f7a8158fd7596db61ef2ac2f86a72d4f5987900e93ee3e8d2d4196aae39ded2

    • SSDEEP

      24576:YD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPj8/j7otSSlFE///c:Yp7E+QrFUBgq2pHV

    • Remcos

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

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • 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.

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks