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Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/03/2024, 06:59

General

  • Target

    c54342185881953b5e36fe05f977cc00.exe

  • Size

    901KB

  • MD5

    c54342185881953b5e36fe05f977cc00

  • SHA1

    e2185b97ad8f467c51470da67ac09e07dab8fe60

  • SHA256

    109a5ffb53cd3311e68c5a28f84fd1d7eb668de3db43a35c344f83785187f915

  • SHA512

    4b16174315b28a250411a86d3b4f297be69a4e4f51899ea7ba94c1e0dde580e5f2f6d331fc5051865aa682f96be5bd3ec2a18caecfd7eae85f58702d0f7279bf

  • SSDEEP

    12288:8HLoR65AXwgFvuSS3sGs6+XqIXq9MZj9Iba0vWtgA7K+zqrkb1NnSzv:8roR6qgEvaiZBEacBuoe1NnMv

Malware Config

Extracted

Family

remcos

Version

3.1.5 Light

Botnet

RemoteHost

C2

91.243.44.5:5149

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • 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

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    Remcos-W0VXG0

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    notepad;solitaire;

Signatures

  • Remcos

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c54342185881953b5e36fe05f977cc00.exe
    "C:\Users\Admin\AppData\Local\Temp\c54342185881953b5e36fe05f977cc00.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1432
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\c54342185881953b5e36fe05f977cc00.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5096
    • C:\Users\Admin\AppData\Local\Temp\c54342185881953b5e36fe05f977cc00.exe
      "C:\Users\Admin\AppData\Local\Temp\c54342185881953b5e36fe05f977cc00.exe"
      2⤵
        PID:2288

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_s4vtirak.nt1.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • memory/1432-10-0x0000000005220000-0x0000000005230000-memory.dmp

      Filesize

      64KB

    • memory/1432-1-0x0000000004F60000-0x0000000004FFC000-memory.dmp

      Filesize

      624KB

    • memory/1432-3-0x00000000055B0000-0x0000000005B54000-memory.dmp

      Filesize

      5.6MB

    • memory/1432-4-0x0000000005000000-0x0000000005092000-memory.dmp

      Filesize

      584KB

    • memory/1432-5-0x0000000005220000-0x0000000005230000-memory.dmp

      Filesize

      64KB

    • memory/1432-6-0x0000000004F50000-0x0000000004F5A000-memory.dmp

      Filesize

      40KB

    • memory/1432-7-0x0000000005230000-0x0000000005286000-memory.dmp

      Filesize

      344KB

    • memory/1432-8-0x00000000053B0000-0x00000000053CA000-memory.dmp

      Filesize

      104KB

    • memory/1432-0-0x0000000000470000-0x0000000000558000-memory.dmp

      Filesize

      928KB

    • memory/1432-9-0x0000000074B80000-0x0000000075330000-memory.dmp

      Filesize

      7.7MB

    • memory/1432-2-0x0000000074B80000-0x0000000075330000-memory.dmp

      Filesize

      7.7MB

    • memory/1432-12-0x000000000B160000-0x000000000B19A000-memory.dmp

      Filesize

      232KB

    • memory/1432-11-0x0000000008D30000-0x0000000008DDC000-memory.dmp

      Filesize

      688KB

    • memory/1432-19-0x0000000074B80000-0x0000000075330000-memory.dmp

      Filesize

      7.7MB

    • memory/2288-16-0x0000000000400000-0x0000000000476000-memory.dmp

      Filesize

      472KB

    • memory/2288-66-0x0000000000400000-0x0000000000476000-memory.dmp

      Filesize

      472KB

    • memory/2288-17-0x0000000000400000-0x0000000000476000-memory.dmp

      Filesize

      472KB

    • memory/2288-20-0x0000000000400000-0x0000000000476000-memory.dmp

      Filesize

      472KB

    • memory/2288-14-0x0000000000400000-0x0000000000476000-memory.dmp

      Filesize

      472KB

    • memory/2288-13-0x0000000000400000-0x0000000000476000-memory.dmp

      Filesize

      472KB

    • memory/5096-23-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

      Filesize

      64KB

    • memory/5096-52-0x0000000006890000-0x00000000068AE000-memory.dmp

      Filesize

      120KB

    • memory/5096-24-0x00000000054E0000-0x0000000005B08000-memory.dmp

      Filesize

      6.2MB

    • memory/5096-25-0x0000000005320000-0x0000000005342000-memory.dmp

      Filesize

      136KB

    • memory/5096-26-0x0000000005C00000-0x0000000005C66000-memory.dmp

      Filesize

      408KB

    • memory/5096-27-0x0000000005C70000-0x0000000005CD6000-memory.dmp

      Filesize

      408KB

    • memory/5096-21-0x0000000074B80000-0x0000000075330000-memory.dmp

      Filesize

      7.7MB

    • memory/5096-37-0x0000000005CE0000-0x0000000006034000-memory.dmp

      Filesize

      3.3MB

    • memory/5096-38-0x00000000062E0000-0x00000000062FE000-memory.dmp

      Filesize

      120KB

    • memory/5096-39-0x0000000006320000-0x000000000636C000-memory.dmp

      Filesize

      304KB

    • memory/5096-40-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

      Filesize

      64KB

    • memory/5096-41-0x00000000068B0000-0x00000000068E2000-memory.dmp

      Filesize

      200KB

    • memory/5096-42-0x00000000713A0000-0x00000000713EC000-memory.dmp

      Filesize

      304KB

    • memory/5096-22-0x0000000004EA0000-0x0000000004EB0000-memory.dmp

      Filesize

      64KB

    • memory/5096-53-0x00000000074F0000-0x0000000007593000-memory.dmp

      Filesize

      652KB

    • memory/5096-54-0x0000000007C40000-0x00000000082BA000-memory.dmp

      Filesize

      6.5MB

    • memory/5096-55-0x00000000075F0000-0x000000000760A000-memory.dmp

      Filesize

      104KB

    • memory/5096-56-0x0000000007660000-0x000000000766A000-memory.dmp

      Filesize

      40KB

    • memory/5096-57-0x0000000007870000-0x0000000007906000-memory.dmp

      Filesize

      600KB

    • memory/5096-58-0x00000000077F0000-0x0000000007801000-memory.dmp

      Filesize

      68KB

    • memory/5096-59-0x0000000007820000-0x000000000782E000-memory.dmp

      Filesize

      56KB

    • memory/5096-60-0x0000000007830000-0x0000000007844000-memory.dmp

      Filesize

      80KB

    • memory/5096-61-0x0000000007930000-0x000000000794A000-memory.dmp

      Filesize

      104KB

    • memory/5096-62-0x0000000007910000-0x0000000007918000-memory.dmp

      Filesize

      32KB

    • memory/5096-65-0x0000000074B80000-0x0000000075330000-memory.dmp

      Filesize

      7.7MB

    • memory/5096-18-0x0000000004D10000-0x0000000004D46000-memory.dmp

      Filesize

      216KB