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General

  • Target

    aa48be12373eee7adb43270e7adde9a854875ceebd5c267fa6bbb79e91ce2030.rtf

  • Size

    70KB

  • Sample

    240316-c6x3bsab3t

  • MD5

    cae8bb9d33e2340998ba5f75ad37f803

  • SHA1

    75e142060680509acade4921ea417e1d438a34fd

  • SHA256

    aa48be12373eee7adb43270e7adde9a854875ceebd5c267fa6bbb79e91ce2030

  • SHA512

    5b5ba31eef6383798733fcb5bbbbe0b28a35b8962207b8a08c494aa18ce48cf4f296af18299b8ddff51b7d6eb07d4864b3ddf4f95bebc8c76959f8ba1e0f8d98

  • SSDEEP

    1536:z8dfmjJH0y/OSefByvp/9/7otRf9rdO5WeIGLTlGrzYNY:z8dfW0yvDToXf9rd2WeI0RGYNY

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

107.172.31.178:2404

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-NVSJ5U

  • 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

      aa48be12373eee7adb43270e7adde9a854875ceebd5c267fa6bbb79e91ce2030.rtf

    • Size

      70KB

    • MD5

      cae8bb9d33e2340998ba5f75ad37f803

    • SHA1

      75e142060680509acade4921ea417e1d438a34fd

    • SHA256

      aa48be12373eee7adb43270e7adde9a854875ceebd5c267fa6bbb79e91ce2030

    • SHA512

      5b5ba31eef6383798733fcb5bbbbe0b28a35b8962207b8a08c494aa18ce48cf4f296af18299b8ddff51b7d6eb07d4864b3ddf4f95bebc8c76959f8ba1e0f8d98

    • SSDEEP

      1536:z8dfmjJH0y/OSefByvp/9/7otRf9rdO5WeIGLTlGrzYNY:z8dfW0yvDToXf9rd2WeI0RGYNY

    • 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

    • 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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks