General

  • Target

    3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe

  • Size

    2.2MB

  • Sample

    240904-bgx6cssalj

  • MD5

    3f97d2a4e5b5a16d9607fe9dfb7ca2c0

  • SHA1

    6264e3311d3c3b0b2ee7b866c3d0a1452031d5e4

  • SHA256

    c46e7b8033aac457b4387c32fba170baf72bfb5a0b378523b225cc51d7f2f92d

  • SHA512

    9b1c08df12092774e82f7a2b4c3196eb9a56796581f73ecd321582106254791a48216d448d91f966fc64017ae2e6b0dca116e421d56a8b515a8768857e0cb44c

  • SSDEEP

    24576:mD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJmFu:mp7E+QrFUBgq2Snau

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

      3f97d2a4e5b5a16d9607fe9dfb7ca2c0N.exe

    • Size

      2.2MB

    • MD5

      3f97d2a4e5b5a16d9607fe9dfb7ca2c0

    • SHA1

      6264e3311d3c3b0b2ee7b866c3d0a1452031d5e4

    • SHA256

      c46e7b8033aac457b4387c32fba170baf72bfb5a0b378523b225cc51d7f2f92d

    • SHA512

      9b1c08df12092774e82f7a2b4c3196eb9a56796581f73ecd321582106254791a48216d448d91f966fc64017ae2e6b0dca116e421d56a8b515a8768857e0cb44c

    • SSDEEP

      24576:mD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYF4avnXJmFu:mp7E+QrFUBgq2Snau

    • 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