Analysis

  • max time kernel
    151s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/08/2023, 10:31

General

  • Target

    tmp.exe

  • Size

    930KB

  • MD5

    d7e7e73ea8759c18b068a1eeb155975a

  • SHA1

    8f1bf0c0d3fa45598a638ad0abd717be7ab1efaa

  • SHA256

    0bd1748c9bcb7917b74f51af9953d5da9aa53f6e6525dd60cc0d50a221cc54aa

  • SHA512

    82e699055f2d0c75702f07a40dd70347781c87c905124dbba1bbead8139695247697388b36c5a503389dc3ed8463e033108a7ae767e0fabf9ebea708203c5825

  • SSDEEP

    12288:H7mHFFD9GRxjnJfgcuEdhoqVF1N0eF0bWWk++IY8g53aN1qQLAfAV3W:bmXkRNJrD1N0eF0/k+fY8URxA

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

134.195.139.194:2404

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-F82W83

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 6 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Suspicious use of SetThreadContext 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2616
    • C:\Users\Admin\AppData\Local\Temp\tmp.exe
      "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
      2⤵
        PID:3952
      • C:\Users\Admin\AppData\Local\Temp\tmp.exe
        "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4688
        • C:\Users\Admin\AppData\Local\Temp\tmp.exe
          C:\Users\Admin\AppData\Local\Temp\tmp.exe /stext "C:\Users\Admin\AppData\Local\Temp\yxwcwxbavocywccjorghusaeihtwun"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4392
        • C:\Users\Admin\AppData\Local\Temp\tmp.exe
          C:\Users\Admin\AppData\Local\Temp\tmp.exe /stext "C:\Users\Admin\AppData\Local\Temp\isbnwqmbjwudziqnfctifxumjolfnyucrq"
          3⤵
            PID:3840
          • C:\Users\Admin\AppData\Local\Temp\tmp.exe
            C:\Users\Admin\AppData\Local\Temp\tmp.exe /stext "C:\Users\Admin\AppData\Local\Temp\suofxi"
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4544

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\remcos\logs.dat

        Filesize

        144B

        MD5

        0be71b5980b6fc994222b5e743ecc244

        SHA1

        2f804f1f3289a21e0f23bddfdf214da49448d20c

        SHA256

        95cde8b98db353b4ce649434ead05b3a7c967dc32529bf05739d8d5b133ec729

        SHA512

        ea4c45089afcd172ec25f28241ff3be28d5e6cf1787a39561611486d68dbfd3cb11edb231448ceeff6443f8f88a9869603b3b937aa33d272dc724d79a31767c9

      • C:\Users\Admin\AppData\Local\Temp\yxwcwxbavocywccjorghusaeihtwun

        Filesize

        4KB

        MD5

        3a76b7ef67ef3e8e1f6224d8d1dfd6f6

        SHA1

        91ab70d5235504d9382187d324d105e0ec9f18b6

        SHA256

        b4e6c48d47450b4a7860837a4af913ea8d8080ae0f34b8328388c209181592cf

        SHA512

        6040e0c4cb75632c8b131e6d130e8a5b8e265502500648bcd0af2919c1cbcafe0d0967e0141ab3768f8e1d6b3579914a20374139cd51065214da93753f07e0c3

      • memory/2616-134-0x0000000000470000-0x000000000055E000-memory.dmp

        Filesize

        952KB

      • memory/2616-133-0x0000000074830000-0x0000000074FE0000-memory.dmp

        Filesize

        7.7MB

      • memory/2616-135-0x0000000005510000-0x0000000005AB4000-memory.dmp

        Filesize

        5.6MB

      • memory/2616-136-0x0000000005000000-0x0000000005092000-memory.dmp

        Filesize

        584KB

      • memory/2616-137-0x00000000051B0000-0x00000000051C0000-memory.dmp

        Filesize

        64KB

      • memory/2616-138-0x0000000004F70000-0x0000000004F7A000-memory.dmp

        Filesize

        40KB

      • memory/2616-139-0x0000000074830000-0x0000000074FE0000-memory.dmp

        Filesize

        7.7MB

      • memory/2616-140-0x00000000051B0000-0x00000000051C0000-memory.dmp

        Filesize

        64KB

      • memory/2616-141-0x000000000A730000-0x000000000A7CC000-memory.dmp

        Filesize

        624KB

      • memory/2616-146-0x0000000074830000-0x0000000074FE0000-memory.dmp

        Filesize

        7.7MB

      • memory/3840-168-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/3840-162-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/3840-173-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/3840-170-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/3840-171-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/4392-182-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/4392-164-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/4392-167-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/4392-159-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/4544-180-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/4544-179-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/4544-177-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/4544-169-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/4688-147-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-144-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-161-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-158-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-156-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-155-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-154-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-153-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-152-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-151-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-150-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-148-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-145-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-163-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-184-0x0000000010000000-0x0000000010019000-memory.dmp

        Filesize

        100KB

      • memory/4688-188-0x0000000010000000-0x0000000010019000-memory.dmp

        Filesize

        100KB

      • memory/4688-187-0x0000000010000000-0x0000000010019000-memory.dmp

        Filesize

        100KB

      • memory/4688-189-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-191-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-193-0x0000000010000000-0x0000000010019000-memory.dmp

        Filesize

        100KB

      • memory/4688-142-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-198-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-199-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-206-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-207-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-214-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB

      • memory/4688-215-0x0000000000400000-0x0000000000481000-memory.dmp

        Filesize

        516KB