General

  • Target

    1.xla

  • Size

    49KB

  • Sample

    240326-hpegjsge8y

  • MD5

    1620224d6efdc7d009b64899a6a67626

  • SHA1

    aa99049bcb8caaac23c7c3a9488b47435ce524ec

  • SHA256

    d1836e6e0661938656d0d8883daa624f59b4a0885cd663be712bfa88a5ccea19

  • SHA512

    88720b9050af39543b21ca51f4771b7b9afecbc7db697fb0116208d2ea18ea290d6b6304ced66d8d602b07cf13664fd4715b0816bd0d93a352c69a275d6600a5

  • SSDEEP

    768:fXyBP0IZ3ovboGfJlETRro0LPpeTQMjpHJDQ/QxLEC65:fX68OPwUTRrnp2hjFJDREC

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

      1.xla

    • Size

      49KB

    • MD5

      1620224d6efdc7d009b64899a6a67626

    • SHA1

      aa99049bcb8caaac23c7c3a9488b47435ce524ec

    • SHA256

      d1836e6e0661938656d0d8883daa624f59b4a0885cd663be712bfa88a5ccea19

    • SHA512

      88720b9050af39543b21ca51f4771b7b9afecbc7db697fb0116208d2ea18ea290d6b6304ced66d8d602b07cf13664fd4715b0816bd0d93a352c69a275d6600a5

    • SSDEEP

      768:fXyBP0IZ3ovboGfJlETRro0LPpeTQMjpHJDQ/QxLEC65:fX68OPwUTRrnp2hjFJDREC

    • 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

    • Adds Run key to start application

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks