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Analysis

  • max time kernel
    117s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    23/09/2024, 11:50

General

  • Target

    20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe

  • Size

    138KB

  • MD5

    a72a99b91f5e47c3a6f40ef983343680

  • SHA1

    a8cfc9541ea81f16d67ebd7900c8020b563d04e7

  • SHA256

    20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684

  • SHA512

    9d9d71e2f00d615c428ea409998ece26a7ba0dd8cc36a3ffa254ba775fcab03f6cca05d1967c9204a9468d1f48c556e34e5cccbb82cc8f1d4e31c592c41f9937

  • SSDEEP

    1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjK6:xPd4n/M+WLcilrpgGH/GwY87mVmIXK

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

systemcontrol.ddns.net:45000

systemcontrol2.ddns.net:45000

Attributes
  • audio_folder

    audio

  • audio_path

    %AppData%

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    5

  • copy_file

    OfficeUpgrade.exe

  • copy_folder

    OfficeUpgrade

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    false

  • install_path

    %AppData%

  • keylog_crypt

    true

  • keylog_file

    Upgrader.dat

  • keylog_flag

    false

  • keylog_folder

    Upgrader

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    req_khauflaoyr

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screens

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • startup_value

    OfficeUpgrade

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • 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 use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe
    "C:\Users\Admin\AppData\Local\Temp\20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1924
    • C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
      "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2288
      • C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
        "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:2744

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

    Filesize

    138KB

    MD5

    d799bb45ce43014dcd1f4e739c887f56

    SHA1

    9612aac6bedd736aa3bd81d7c051f4137b66d7fe

    SHA256

    0866416b526c75b4083f64b36ccf75eafd72d8102834ac745f0acfba4dac136b

    SHA512

    7bcbc347463ff65157dcf0fab06054a85f772d9494aefa896d0dd1138a2e3fdf06b76add813f2c122c4f860f67b05e1c87240cf2737a30ecb09daaa8d27d1101

  • memory/1924-1-0x00000000011B0000-0x00000000011D8000-memory.dmp

    Filesize

    160KB

  • memory/1924-2-0x00000000740C0000-0x00000000747AE000-memory.dmp

    Filesize

    6.9MB

  • memory/1924-3-0x00000000003D0000-0x00000000003F0000-memory.dmp

    Filesize

    128KB

  • memory/1924-12-0x00000000740CE000-0x00000000740CF000-memory.dmp

    Filesize

    4KB

  • memory/1924-13-0x00000000740C0000-0x00000000747AE000-memory.dmp

    Filesize

    6.9MB

  • memory/1924-0-0x00000000740CE000-0x00000000740CF000-memory.dmp

    Filesize

    4KB

  • memory/2288-37-0x00000000740C0000-0x00000000747AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2288-14-0x0000000000C20000-0x0000000000C48000-memory.dmp

    Filesize

    160KB

  • memory/2288-15-0x00000000740C0000-0x00000000747AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2288-16-0x00000000740C0000-0x00000000747AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2288-38-0x00000000740C0000-0x00000000747AE000-memory.dmp

    Filesize

    6.9MB

  • memory/2744-17-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2744-25-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2744-23-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2744-21-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2744-19-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2744-32-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2744-33-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2744-36-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2744-27-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB

  • memory/2744-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2744-41-0x0000000000400000-0x0000000000417000-memory.dmp

    Filesize

    92KB