Analysis

  • max time kernel
    181s
  • max time network
    183s
  • platform
    windows10-1703_x64
  • resource
    win10-20220812-en
  • resource tags

    arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
  • submitted
    22-10-2022 06:25

General

  • Target

    fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25.exe

  • Size

    1.1MB

  • MD5

    fd0e549414dc04399f330542472c54b1

  • SHA1

    4480c47022f9318f8745a7c9ed276df235303c3a

  • SHA256

    fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25

  • SHA512

    e42ba3f00ffc01327ae17b0661fefd84ea54a1b160997f24b90b62ce9341e4adbddc5d879bf56e13ff35083c60a209ffe7e539d5fc0215dcf197f66cb8a0e69d

  • SSDEEP

    24576:IX+kYOD14qz/3ohrxSco/oQVQ64Wbuf3oIauxPpLnSlF:KYOD14SQQ0fPo7u7nkF

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 use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25.exe
    "C:\Users\Admin\AppData\Local\Temp\fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2908
    • C:\Users\Admin\AppData\Local\Temp\fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25.exe
      "C:\Users\Admin\AppData\Local\Temp\fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25.exe"
      2⤵
      • Adds Run key to start application
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:3580
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1660
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4240
          • 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:4640
            • 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:584

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

    1.1MB

    MD5

    fd0e549414dc04399f330542472c54b1

    SHA1

    4480c47022f9318f8745a7c9ed276df235303c3a

    SHA256

    fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25

    SHA512

    e42ba3f00ffc01327ae17b0661fefd84ea54a1b160997f24b90b62ce9341e4adbddc5d879bf56e13ff35083c60a209ffe7e539d5fc0215dcf197f66cb8a0e69d

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

    1.1MB

    MD5

    fd0e549414dc04399f330542472c54b1

    SHA1

    4480c47022f9318f8745a7c9ed276df235303c3a

    SHA256

    fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25

    SHA512

    e42ba3f00ffc01327ae17b0661fefd84ea54a1b160997f24b90b62ce9341e4adbddc5d879bf56e13ff35083c60a209ffe7e539d5fc0215dcf197f66cb8a0e69d

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

    1.1MB

    MD5

    fd0e549414dc04399f330542472c54b1

    SHA1

    4480c47022f9318f8745a7c9ed276df235303c3a

    SHA256

    fccf5521a09be0f003c6415ee7c87cd98cd109511ef7f79990e4386fcca0ae25

    SHA512

    e42ba3f00ffc01327ae17b0661fefd84ea54a1b160997f24b90b62ce9341e4adbddc5d879bf56e13ff35083c60a209ffe7e539d5fc0215dcf197f66cb8a0e69d

  • memory/584-384-0x000000000043168C-mapping.dmp
  • memory/584-442-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/584-436-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/1660-238-0x0000000000000000-mapping.dmp
  • memory/2908-152-0x0000000005C00000-0x00000000060FE000-memory.dmp
    Filesize

    5.0MB

  • memory/2908-184-0x00000000093E0000-0x000000000945A000-memory.dmp
    Filesize

    488KB

  • memory/2908-120-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-121-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-122-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-123-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-124-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-125-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-126-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-127-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-128-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-129-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-130-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-131-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-132-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-133-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-134-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-135-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-136-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-137-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-138-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-139-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-140-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-141-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-142-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-143-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-144-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-145-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-146-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-156-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-148-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-149-0x0000000000CC0000-0x0000000000DD6000-memory.dmp
    Filesize

    1.1MB

  • memory/2908-150-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-151-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-158-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-153-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-154-0x0000000005610000-0x00000000056A2000-memory.dmp
    Filesize

    584KB

  • memory/2908-155-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-147-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-119-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-118-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-159-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-160-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-161-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-162-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-163-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-164-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-165-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-166-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-167-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-168-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-169-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-170-0x00000000055F0000-0x00000000055FA000-memory.dmp
    Filesize

    40KB

  • memory/2908-171-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-172-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-173-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-174-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-175-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-176-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-177-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-178-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-179-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-180-0x0000000005BE0000-0x0000000005BF6000-memory.dmp
    Filesize

    88KB

  • memory/2908-181-0x0000000008FF0000-0x000000000908C000-memory.dmp
    Filesize

    624KB

  • memory/2908-182-0x0000000009230000-0x0000000009300000-memory.dmp
    Filesize

    832KB

  • memory/2908-183-0x0000000009370000-0x00000000093D6000-memory.dmp
    Filesize

    408KB

  • memory/2908-157-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-115-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-116-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/2908-117-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/3580-188-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/3580-234-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/3580-259-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/3580-187-0x0000000077960000-0x0000000077AEE000-memory.dmp
    Filesize

    1.6MB

  • memory/3580-186-0x000000000043168C-mapping.dmp
  • memory/3580-185-0x0000000000400000-0x000000000047E000-memory.dmp
    Filesize

    504KB

  • memory/4240-306-0x0000000000000000-mapping.dmp
  • memory/4640-319-0x0000000000000000-mapping.dmp