Analysis

  • max time kernel
    147s
  • max time network
    147s
  • platform
    windows10-1703_x64
  • resource
    win10-20220812-en
  • resource tags

    arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
  • submitted
    15-08-2022 19:45

General

  • Target

    3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32.exe

  • Size

    888KB

  • MD5

    7f93ebca40acd75da0b0a599e0eb5276

  • SHA1

    255df64f2dc464e5e89cd20d633605a5c02e9500

  • SHA256

    3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32

  • SHA512

    9956bc0e6dc29df89bcaffdc6f925709314657e0dbd4484ec66cd41f1825fc692d71cc733fe5d2d724a40073f66672bc396f461c81993324e7f731457fbc9ab5

Malware Config

Extracted

Family

remcos

Botnet

XP

C2

xpremcuz300622.ddns.net:3542

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    oos.exe

  • delete_file

    false

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Remcos-MMP2I7

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    kkl

  • 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
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32.exe
    "C:\Users\Admin\AppData\Local\Temp\3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2584
    • C:\Users\Admin\AppData\Local\Temp\3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32.exe
      "C:\Users\Admin\AppData\Local\Temp\3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32.exe"
      2⤵
        PID:64
      • C:\Users\Admin\AppData\Local\Temp\3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32.exe
        "C:\Users\Admin\AppData\Local\Temp\3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32.exe"
        2⤵
        • Adds Run key to start application
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:1852
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4920
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:4940
            • C:\Users\Admin\AppData\Roaming\oos.exe
              C:\Users\Admin\AppData\Roaming\oos.exe
              5⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:4336
              • C:\Users\Admin\AppData\Roaming\oos.exe
                "C:\Users\Admin\AppData\Roaming\oos.exe"
                6⤵
                • Executes dropped EXE
                • Adds Run key to start application
                • Suspicious use of SetWindowsHookEx
                PID:4468

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\install.vbs
      Filesize

      398B

      MD5

      a5d3440f90cbfae712166e20870eaed7

      SHA1

      cc1e1a2945eb2ad475234344f7527ad9e9873647

      SHA256

      960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02

      SHA512

      d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa

    • C:\Users\Admin\AppData\Roaming\oos.exe
      Filesize

      888KB

      MD5

      7f93ebca40acd75da0b0a599e0eb5276

      SHA1

      255df64f2dc464e5e89cd20d633605a5c02e9500

      SHA256

      3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32

      SHA512

      9956bc0e6dc29df89bcaffdc6f925709314657e0dbd4484ec66cd41f1825fc692d71cc733fe5d2d724a40073f66672bc396f461c81993324e7f731457fbc9ab5

    • C:\Users\Admin\AppData\Roaming\oos.exe
      Filesize

      888KB

      MD5

      7f93ebca40acd75da0b0a599e0eb5276

      SHA1

      255df64f2dc464e5e89cd20d633605a5c02e9500

      SHA256

      3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32

      SHA512

      9956bc0e6dc29df89bcaffdc6f925709314657e0dbd4484ec66cd41f1825fc692d71cc733fe5d2d724a40073f66672bc396f461c81993324e7f731457fbc9ab5

    • C:\Users\Admin\AppData\Roaming\oos.exe
      Filesize

      888KB

      MD5

      7f93ebca40acd75da0b0a599e0eb5276

      SHA1

      255df64f2dc464e5e89cd20d633605a5c02e9500

      SHA256

      3639a796055969929b98a8a34fde77d9a0f79242ec6f012fea2dc14a98752a32

      SHA512

      9956bc0e6dc29df89bcaffdc6f925709314657e0dbd4484ec66cd41f1825fc692d71cc733fe5d2d724a40073f66672bc396f461c81993324e7f731457fbc9ab5

    • memory/1852-191-0x000000000043168C-mapping.dmp
    • memory/1852-236-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/1852-262-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/2584-155-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-185-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-122-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-123-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-124-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-125-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-126-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-127-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-128-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-129-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-130-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-131-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-132-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-133-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-134-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-135-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-136-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-137-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-138-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-139-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-140-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-141-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-142-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-143-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-144-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-160-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-146-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-147-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-148-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-149-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-150-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-151-0x0000000000360000-0x0000000000444000-memory.dmp
      Filesize

      912KB

    • memory/2584-152-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-153-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-154-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-120-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-156-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-157-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-117-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-121-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-145-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-161-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-162-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-163-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-164-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-165-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-166-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-167-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-168-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-169-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-170-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-171-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-172-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-173-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-174-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-175-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-176-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-177-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-178-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-179-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-180-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-181-0x0000000004DE0000-0x0000000004EAC000-memory.dmp
      Filesize

      816KB

    • memory/2584-182-0x0000000002770000-0x0000000002788000-memory.dmp
      Filesize

      96KB

    • memory/2584-183-0x0000000004F50000-0x0000000004FE2000-memory.dmp
      Filesize

      584KB

    • memory/2584-184-0x00000000051F0000-0x000000000528C000-memory.dmp
      Filesize

      624KB

    • memory/2584-159-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-187-0x00000000055B0000-0x000000000566C000-memory.dmp
      Filesize

      752KB

    • memory/2584-188-0x0000000005680000-0x00000000056FA000-memory.dmp
      Filesize

      488KB

    • memory/2584-158-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-118-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/2584-119-0x0000000077A40000-0x0000000077BCE000-memory.dmp
      Filesize

      1.6MB

    • memory/4336-327-0x0000000000000000-mapping.dmp
    • memory/4468-396-0x000000000043168C-mapping.dmp
    • memory/4468-450-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/4468-451-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/4920-246-0x0000000000000000-mapping.dmp
    • memory/4940-314-0x0000000000000000-mapping.dmp