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General

  • Target

    993f36b20759d8332adcf16bba3414c333d4f641d70736239f956616096d80b3.doc

  • Size

    95KB

  • Sample

    240310-cw43wshh42

  • MD5

    b767206d76da2c53df676a4f8a98d903

  • SHA1

    d65c6fdaedaa406aa0e05a868a227c68037ae724

  • SHA256

    993f36b20759d8332adcf16bba3414c333d4f641d70736239f956616096d80b3

  • SHA512

    e2af9ee38d5e34442d3f2b48229a754efc04038c05dafbba4856463fadacc8fe10acfad455d03e6c401dd344ee80c1156754f6606eb095d5e1bafbc5145ae723

  • SSDEEP

    768:GwAbZSibMX9gRWjtwAbZSibMX9gRWjtwAbZSibMX9gRWjZcDoZPAGs5UILbM7:GwAlRkwAlRkwAlRicKj/UM7

Malware Config

Extracted

Family

remcos

Botnet

ocnjump

C2

psolver827.ddns.net:6696

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

    true

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-D0QJSS

  • 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

      993f36b20759d8332adcf16bba3414c333d4f641d70736239f956616096d80b3.doc

    • Size

      95KB

    • MD5

      b767206d76da2c53df676a4f8a98d903

    • SHA1

      d65c6fdaedaa406aa0e05a868a227c68037ae724

    • SHA256

      993f36b20759d8332adcf16bba3414c333d4f641d70736239f956616096d80b3

    • SHA512

      e2af9ee38d5e34442d3f2b48229a754efc04038c05dafbba4856463fadacc8fe10acfad455d03e6c401dd344ee80c1156754f6606eb095d5e1bafbc5145ae723

    • SSDEEP

      768:GwAbZSibMX9gRWjtwAbZSibMX9gRWjtwAbZSibMX9gRWjZcDoZPAGs5UILbM7:GwAlRkwAlRkwAlRicKj/UM7

    • 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

    • Downloads MZ/PE file

    • 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.

    • Accesses Microsoft Outlook accounts

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks