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Analysis

  • max time kernel
    140s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/07/2024, 21:46

General

  • Target

    57a5ddf02dc12ab93b8763a85a05ade94add0f51109a9bb532ddddcbfb957aee.exe

  • Size

    1.9MB

  • MD5

    a01fc27f1f56ee7a8803c9ec23516f76

  • SHA1

    5454698bd7f59b0bf6ada7c26e29fcea903caa2a

  • SHA256

    57a5ddf02dc12ab93b8763a85a05ade94add0f51109a9bb532ddddcbfb957aee

  • SHA512

    648a557b9f1bca784f3d046541f4f5102640d9ed2d87b854d2720fb35c83f22f0b924d0c71ed3fd8c929b9429fd092cf531e9f8d15be190850ffb63d939f4dee

  • SSDEEP

    24576:OD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYFES7Ns:Op7E+QrFUBgq2aa

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

213.183.58.19:4000

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    remcos.exe

  • copy_folder

    remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    true

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    true

  • keylog_file

    read.dat

  • keylog_flag

    false

  • keylog_folder

    CastC

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    remcos_sccafsoidz

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\57a5ddf02dc12ab93b8763a85a05ade94add0f51109a9bb532ddddcbfb957aee.exe
    "C:\Users\Admin\AppData\Local\Temp\57a5ddf02dc12ab93b8763a85a05ade94add0f51109a9bb532ddddcbfb957aee.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1052
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2908
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:3032

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

    Filesize

    1.9MB

    MD5

    ccad4f72c1dd34b23a3a5f2afec82b38

    SHA1

    2f6a6e7082f57758eb90c3281c53660d9219276a

    SHA256

    fcb2658874bcc30433a9e2bae1618d461362ffbd7b279e1fc63bfaf3110b5a2e

    SHA512

    f69bd6d2dc4dd7c78350a1c2d96d47f81cf9fc2fd6266852391d01e44c6d7150021d03b8d96eabffd393018530f0a7bc97bd4c87e7795c8e7dd4d5b362c22fed

  • memory/1052-0-0x00000000748F2000-0x00000000748F3000-memory.dmp

    Filesize

    4KB

  • memory/1052-1-0x00000000748F0000-0x0000000074EA1000-memory.dmp

    Filesize

    5.7MB

  • memory/1052-2-0x00000000748F0000-0x0000000074EA1000-memory.dmp

    Filesize

    5.7MB

  • memory/1052-5-0x00000000748F0000-0x0000000074EA1000-memory.dmp

    Filesize

    5.7MB

  • memory/1052-6-0x00000000748F0000-0x0000000074EA1000-memory.dmp

    Filesize

    5.7MB

  • memory/1052-28-0x00000000748F0000-0x0000000074EA1000-memory.dmp

    Filesize

    5.7MB

  • memory/2908-30-0x00000000748F0000-0x0000000074EA1000-memory.dmp

    Filesize

    5.7MB

  • memory/2908-29-0x00000000748F0000-0x0000000074EA1000-memory.dmp

    Filesize

    5.7MB

  • memory/2908-32-0x00000000748F0000-0x0000000074EA1000-memory.dmp

    Filesize

    5.7MB

  • memory/2908-31-0x00000000748F0000-0x0000000074EA1000-memory.dmp

    Filesize

    5.7MB

  • memory/2908-44-0x00000000748F0000-0x0000000074EA1000-memory.dmp

    Filesize

    5.7MB

  • memory/3032-33-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/3032-36-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/3032-40-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/3032-37-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/3032-42-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/3032-43-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/3032-47-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB