Resubmissions

26-03-2024 15:41

240326-s4zq5sdc96 10

26-03-2024 09:20

240326-la8zdshh8x 10

General

  • Target

    Order request list.xls

  • Size

    317KB

  • Sample

    240326-s4zq5sdc96

  • MD5

    e8c8fee58f84cd706cd5955773887500

  • SHA1

    f80268a58e1f1635dd9ccd6dd029dae2bf93fd58

  • SHA256

    3ac1e9bc1c29e4f900a34d8e98672106887155015c3d868eb35b18a546f64af9

  • SHA512

    c9a2e5b267d21ce88e8ac240590048702e1054f23fdaabbef234c58ceada0b9dcb177ad5ebb219ebffde3cf6e7679fa7dbf031881024b529e0155e0e9836f57e

  • SSDEEP

    6144:Q0unhXF7uY35qAOJl/YrLYz+WrNhZF+E+fgL+0dD8ivSbVsHMI2brcbJTvhl8ult:Q9hXdn3bVsHMI2cJjZlTiAp

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

lasteast.duckdns.org:2401

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-T50E1H

  • 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

      Order request list.xls

    • Size

      317KB

    • MD5

      e8c8fee58f84cd706cd5955773887500

    • SHA1

      f80268a58e1f1635dd9ccd6dd029dae2bf93fd58

    • SHA256

      3ac1e9bc1c29e4f900a34d8e98672106887155015c3d868eb35b18a546f64af9

    • SHA512

      c9a2e5b267d21ce88e8ac240590048702e1054f23fdaabbef234c58ceada0b9dcb177ad5ebb219ebffde3cf6e7679fa7dbf031881024b529e0155e0e9836f57e

    • SSDEEP

      6144:Q0unhXF7uY35qAOJl/YrLYz+WrNhZF+E+fgL+0dD8ivSbVsHMI2brcbJTvhl8ult:Q9hXdn3bVsHMI2cJjZlTiAp

    • Remcos

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

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Nirsoft

    • Blocklisted process makes network request

    • Abuses OpenXML format to download file from external location

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses Microsoft Outlook accounts

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks