General

  • Target

    New Order.xla.xlsx

  • Size

    239KB

  • Sample

    240430-ml4z9aaa73

  • MD5

    33106af96347ba4877e96185f9293624

  • SHA1

    4f15b170b928f75cd4a0b5ee4d14c7a38c264e57

  • SHA256

    786bdc138493ae90d9a94a75e3c8900684f6854219d7698a22bf81cc2c32ef7c

  • SHA512

    191c08068c6a378b36239d9283690710e18f2ae3c37ca608c5262b74f0384721b58955435e84a93dd019f6e83db41d4b2ca277f3c9b89807907e108e52345060

  • SSDEEP

    6144:Vd4UcLe0JOqPQZR8MDdATCR3tSv0W8x4tlLDL3w4Mp:wUP/qPQZR8MxAm/S8W8CnbAb

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

      New Order.xla.xlsx

    • Size

      239KB

    • MD5

      33106af96347ba4877e96185f9293624

    • SHA1

      4f15b170b928f75cd4a0b5ee4d14c7a38c264e57

    • SHA256

      786bdc138493ae90d9a94a75e3c8900684f6854219d7698a22bf81cc2c32ef7c

    • SHA512

      191c08068c6a378b36239d9283690710e18f2ae3c37ca608c5262b74f0384721b58955435e84a93dd019f6e83db41d4b2ca277f3c9b89807907e108e52345060

    • SSDEEP

      6144:Vd4UcLe0JOqPQZR8MDdATCR3tSv0W8x4tlLDL3w4Mp:wUP/qPQZR8MxAm/S8W8CnbAb

    • 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

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks