Analysis

  • max time kernel
    122s
  • max time network
    139s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    21/02/2024, 03:38

General

  • Target
    7831c040565e36128d3f589b734338eb5cf216290dc0c2138d8564689991ae62.exe
  • Size 20.6MB
  • Sample240221-d7cnfsbc96
  • SHA256 7831c040565e36128d3f589b734338eb5cf216290dc0c2138d8564689991ae62
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • NetSupport

    NetSupport is a remote access tool sold as a legitimate system administration software.

  • UPX dump on OEP (original entry point) 3 IoCs
  • Drops file in Drivers directory 5 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Executes dropped EXE 8 IoCs
  • Loads dropped DLL 46 IoCs
  • Registers COM server for autorun 1 TTPs 3 IoCs
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Blocklisted process makes network request 4 IoCs
  • Enumerates connected drives 3 TTPs 25 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Modifies WinLogon 2 TTPs 1 IoCs
  • Drops file in System32 directory 38 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 49 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 64 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7831c040565e36128d3f589b734338eb5cf216290dc0c2138d8564689991ae62.exe
    "C:\Users\Admin\AppData\Local\Temp\7831c040565e36128d3f589b734338eb5cf216290dc0c2138d8564689991ae62.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1180
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\97DC.tmp\Install.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2452
      • C:\Windows\SysWOW64\msiexec.exe
        "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\97DC.tmp\ns.msi" /qn /quiet /promptrestart
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1480
      • C:\Windows\SysWOW64\reg.exe
        REG ADD HKLM\SYSTEM\ControlSet001\services\Client32 /f /v DisplayName /t REG_SZ /d "PCHelper ôñá½Ñ¡¡δ⌐ »«¼«Θ¡¿¬"
        3⤵
        • Modifies registry key
        PID:2332
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Blocklisted process makes network request
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2584
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding ADC0A471DC85A3ADDB81510396286A5E
      2⤵
      • Loads dropped DLL
      • Modifies registry class
      PID:2940
    • C:\Windows\system32\cmd.exe
      cmd.exe /c ATTRIB -R "C:\Users\Admin\AppData\Local\Temp\{64893459-B4B8-403D-8E2D-8395D2BA3F1F}\\nsm.lic"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2368
      • C:\Windows\SysWOW64\attrib.exe
        ATTRIB -R "C:\Users\Admin\AppData\Local\Temp\{64893459-B4B8-403D-8E2D-8395D2BA3F1F}\\nsm.lic"
        3⤵
        • Suspicious behavior: CmdExeWriteProcessMemorySpam
        • Views/modifies file attributes
        PID:1364
    • C:\Windows\Installer\MSIC891.tmp
      "C:\Windows\Installer\MSIC891.tmp" NSConnSvrUI.exe NSN
      2⤵
      • Executes dropped EXE
      PID:1312
    • C:\Windows\Installer\MSIC90F.tmp
      "C:\Windows\Installer\MSIC90F.tmp" NewShortcut1_DC174CC2D1F545EBA5FA9A05CD201FFD.exe NSN
      2⤵
      • Executes dropped EXE
      PID:904
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 7DFC86175E53200EA849C8DFB6C72914 M Global\MSI0000
      2⤵
      • Loads dropped DLL
      • Modifies registry class
      PID:2240
    • C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\checkdvd.exe
      "C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\checkdvd.exe"
      2⤵
      • Executes dropped EXE
      PID:2624
    • C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\WINSTALL.EXE
      "C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\WINSTALL.EXE" /EV"NetSupport School" /EF".\Log Files" /EF".\Bookmarks" /EF".\Tests" /EF".\Store" /EF".\inv" /EA /EX /EC /Q /V /Q /I *
      2⤵
      • Sets service image path in registry
      • Executes dropped EXE
      • Loads dropped DLL
      • Modifies WinLogon
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1260
      • C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\winst64.exe
        winst64.exe /q /q /i
        3⤵
        • Drops file in Drivers directory
        • Executes dropped EXE
        • Loads dropped DLL
        • Registers COM server for autorun
        • Drops file in System32 directory
        • Drops file in Windows directory
        • Modifies data under HKEY_USERS
        • Modifies registry class
        PID:2536
    • C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\WINSTALL.EXE
      "C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\WINSTALL.EXE" /EI
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      PID:3036
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "4" "0" "C:\Users\Admin\AppData\Local\Temp\{2878b1b8-686d-5742-185f-140aba8c756a}\gdihook5.inf" "9" "6d3d268df" "000000000000005C" "WinSta0\Default" "00000000000003E4" "208" "c:\program files (x86)\pchelper\óäàëåííûé ïîìîùíèê"
    1⤵
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    PID:2528
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "2" "211" "ROOT\DISPLAY\0000" "C:\Windows\INF\oem2.inf" "gdihook5.inf:gdihook5.Mfg.NTamd64:gdihook5:11.11.0.704:pci_gdihook5_hwid" "6d3d268df" "000000000000005C" "00000000000003B0" "00000000000005C4"
    1⤵
    • Drops file in Drivers directory
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    PID:2456
  • C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\client32.exe
    "C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\client32.exe" /* *
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    PID:2052
    • C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\client32.exe
      "C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\client32.exe" * /VistaUI
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Enumerates connected drives
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Checks SCSI registry key(s)
      • Checks processor information in registry
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      PID:2660

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        f76aa09.rbs

        • Path C:\Config.Msi\f76aa09.rbs
        • Size 38KB
        • SHA256 22c2f6a831f939feabaae9744c945e139a24f03ecc2f423af71442f3384aa1f2
        • MD5 SHA1 SHA512 SSDEEP

        WINSTALL.EXE

        • Path C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\WINSTALL.EXE
        • Size 192KB
        • SHA256 7ed721b9f515dbb10507e9c97e6a3bc65a3a3409fc2821ff389802fbd2f9a76c
        • MD5 SHA1 SHA512 SSDEEP

        checkdvd.exe

        • Path C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\checkdvd.exe
        • Size 396KB
        • SHA256 a51fa80689ca5af9ee74995a8e6c6f0b3b63b21b8eea53981836cbda4dcdc736
        • MD5 SHA1 SHA512 SSDEEP

        clhook4.dll

        • Path C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\clhook4.dll
        • Size 94KB
        • SHA256 22089a0e1c8532f0e65b850d722a544ce59b9cd030f87cf8ccf4ce24f60c6ee4
        • MD5 SHA1 SHA512 SSDEEP

        client32provider.dll

        • Path C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\client32provider.dll
        • Size 82KB
        • SHA256 ac455c89a8c167cf6552613a7adfc66f62ad15c35f6ebeb5c32fe8565c68d72c
        • MD5 SHA1 SHA512 SSDEEP

        nskbfltr.sys

        • Path C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\nskbfltr.sys
        • Size 33KB
        • SHA256 e7e628de2ed025ad146328e86fa7ab83a79962972cc847263f984edc567d6e7c
        • MD5 SHA1 SHA512 SSDEEP

        pcimsg.dll

        • Path C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\pcimsg.dll
        • Size 37KB
        • SHA256 cc905356821f51db8e4ee2ec96f44b28cbc1f817cb6f147b0abef41233280d42
        • MD5 SHA1 SHA512 SSDEEP

        pcisys.sys

        • Path C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\pcisys.sys
        • Size 21KB
        • SHA256 3ddec977bd8f93fd22b1e4c98083aa0de94074d5b1f3994ec71bbefc584694d1
        • MD5 SHA1 SHA512 SSDEEP

        product.dat

        • Path C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\product.dat
        • Size 506B
        • SHA256 065d817596d710d5a06060241acc207b82b844530cc56ff842ff53d8ff92a075
        • MD5 SHA1 SHA512

        winst64.exe

        • Path C:\Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\winst64.exe
        • Size 127KB
        • SHA256 15d7d3c8cd9654fc6e52cd77d674bced7b57c9710f4e615fe8630fd2282d3618
        • MD5 SHA1 SHA512 SSDEEP

        Client32.ini

        • Path C:\Users\Admin\AppData\Local\Temp\97DC.tmp\Client32.ini
        • Size 1KB
        • SHA256 153dc072bc02d29f33e826a9116ee13094dc87eb83956aa48bd604a8d9aa3d7c
        • MD5 SHA1 SHA512

        Install.bat

        • Path C:\Users\Admin\AppData\Local\Temp\97DC.tmp\Install.bat
        • Size 312B
        • SHA256 cacd72fe9928925d9e2f08d0e551ce63c2415d31e3987e90a727841f7d8ea791
        • MD5 SHA1 SHA512

        NSM.ini

        • Path C:\Users\Admin\AppData\Local\Temp\97DC.tmp\NSM.ini
        • Size 69B
        • SHA256 011c851c57cbec1d827b3d129c6786d60bbf82460254a4a5b2ad292ab83c9b22
        • MD5 SHA1 SHA512

        NSM.lic

        • Path C:\Users\Admin\AppData\Local\Temp\97DC.tmp\NSM.lic
        • Size 255B
        • SHA256 61cfdefd60d4839a8d38b4e2483f68c26b7e2b8dbbe697e75679b7f03b292b67
        • MD5 SHA1 SHA512

        ns.msi

        • Path C:\Users\Admin\AppData\Local\Temp\97DC.tmp\ns.msi
        • Size 1.7MB
        • SHA256 143525bef5a91ff30ce3fadc78e376e16fca45739d334da5909aeec57c80f7e9
        • MD5 SHA1 SHA512 SSDEEP

        CabAE5B.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\CabAE5B.tmp
        • Size 65KB
        • SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
        • MD5 SHA1 SHA512 SSDEEP

        DLL_{64893459-B4B8-403D-8E2D-8395D2BA3F1F}.ini

        • Path C:\Users\Admin\AppData\Local\Temp\DLL_{64893459-B4B8-403D-8E2D-8395D2BA3F1F}.ini
        • Size 1KB
        • SHA256 d8ad82d7687c678788c33fcdcc2ae21c42cc5873377195d39affc1a6f3a24a57
        • MD5 SHA1 SHA512

        TarB11C.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\TarB11C.tmp
        • Size 171KB
        • SHA256 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f
        • MD5 SHA1 SHA512 SSDEEP

        Client32.upd

        • Path C:\Users\Admin\AppData\Local\Temp\{64893459-B4B8-403D-8E2D-8395D2BA3F1F}\Client32.upd
        • Size 25B
        • SHA256 00e0c629d5645c15df66adcf99e8a0a3e517d7a7876141ae7a752f0585eec047
        • MD5 SHA1 SHA512

        NSM.LIC

        • Path C:\Users\Admin\AppData\Local\Temp\{64893459-B4B8-403D-8E2D-8395D2BA3F1F}\NSM.LIC
        • Size 255B
        • SHA256 64c45c70743b974f63e8d85ffa30cc96d9788e3bad730fd96d9bf8068777eb5c
        • MD5 SHA1 SHA512

        ~CA81.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\~CA81.tmp
        • Size 270B
        • SHA256 677d68b44aee25f998bbeea952726295c63052742c97efc9eb9ab0172f72ea3c
        • MD5 SHA1 SHA512

        ~CA81.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\~CA81.tmp
        • Size 281B
        • SHA256 82999a16b37cc6bba663fae8e963c3888a6dee162adf8d074edd5d579cb8bf65
        • MD5 SHA1 SHA512

        MSIB310.tmp

        • Path C:\Windows\Installer\MSIB310.tmp
        • Size 48KB
        • SHA256 cc188b1cac39d8d8a5d1a2195f8e0b9b4fb8d0608fcade43274540f300730cef
        • MD5 SHA1 SHA512 SSDEEP

        MSIB774.tmp

        • Path C:\Windows\Installer\MSIB774.tmp
        • Size 212KB
        • SHA256 cff87c98eec91a11f254db00a59c4df32cfad308d74042a2c01eaea079dbd7a2
        • MD5 SHA1 SHA512 SSDEEP

        MSIB811.tmp

        • Path C:\Windows\Installer\MSIB811.tmp
        • Size 224KB
        • SHA256 c0b50aab3b865dfbfa28b2ccb05641da06c58fcb8e79cc90ffe8a4dfe5ae2b94
        • MD5 SHA1 SHA512 SSDEEP

        MSIB88F.tmp

        • Path C:\Windows\Installer\MSIB88F.tmp
        • Size 97KB
        • SHA256 b42ce4941df68de1529e9d5af4bcfa6fef8f74f009b9b9e2d58ec4716bf92fb0
        • MD5 SHA1 SHA512 SSDEEP

        MSIB91C.tmp

        • Path C:\Windows\Installer\MSIB91C.tmp
        • Size 80KB
        • SHA256 1695cbbfb7add4687249c37f180118d89f5c84739fac6901404f3b80d73fa513
        • MD5 SHA1 SHA512 SSDEEP

        MSIC891.tmp

        • Path C:\Windows\Installer\MSIC891.tmp
        • Size 106KB
        • SHA256 731dfe0007ebafbf110632ee6d9e7f2b36b53f17be5117eab92abbd8b32a9c81
        • MD5 SHA1 SHA512 SSDEEP

        MSICA68.tmp

        • Path C:\Windows\Installer\MSICA68.tmp
        • Size 104KB
        • SHA256 072e4d185482beccf7967dcf10649ee1ea863da61c8336c0215d458b0254977f
        • MD5 SHA1 SHA512 SSDEEP

        f76aa05.msi

        • Path C:\Windows\Installer\f76aa05.msi
        • Size 2.1MB
        • SHA256 3b843d6979bf8897f4fb65eb53b4f9adf3f981333f01b8d78bdfde8cba1efd04
        • MD5 SHA1 SHA512 SSDEEP

        SETECEF.tmp

        • Path C:\Windows\System32\DriverStore\Temp\{2446fec2-4cce-72c9-c724-415ac948670d}\x64\SETECEF.tmp
        • Size 68KB
        • SHA256 641f2b86f013a95707ffdf0f584e3a83fedc1392cea3b546905b9ccb54ae10cf
        • MD5 SHA1 SHA512 SSDEEP

        oem2.PNF

        • Path C:\Windows\inf\oem2.PNF
        • Size 8KB
        • SHA256 a9dd38a9b04e68792d55af484fa0adea268eb98ab36b01db05fefbbf4595ada7
        • MD5 SHA1 SHA512 SSDEEP

        gdihook5.dll

        • Path \??\c:\PROGRA~2\pchelper\48B7~1\x64\gdihook5.dll
        • Size 95KB
        • SHA256 2b675e9c27d3fb01cb9df2583b380de8dc8c0d5bbbe18af458f90b47c6d62b03
        • MD5 SHA1 SHA512 SSDEEP

        gdihook5.cat

        • Path \??\c:\program files (x86)\pchelper\óäàëåííûé ïîìîùíèê\gdihook5.cat
        • Size 8KB
        • SHA256 019290c9b7e5b48fb6de95f9563ed481cd42f8658451c6fbc8ad131d61209ce0
        • MD5 SHA1 SHA512 SSDEEP

        gdihook5.inf

        • Path \??\c:\program files (x86)\pchelper\óäàëåííûé ïîìîùíèê\gdihook5.inf
        • Size 2KB
        • SHA256 4cfca868959f4e1b85bfd6b8a970ae06c0810d9c341f260df3ab8479089500e9
        • MD5 SHA1 SHA512

        shfolder.dll

        • Path \Program Files (x86)\pchelper\Óäàëåííûé ïîìîùíèê\shfolder.dll
        • Size 28KB
        • SHA256 3419e795ff8ae1e2c188a45b9a31c77a7fb15a45684fcbe70c220945c63422c7
        • MD5 SHA1 SHA512 SSDEEP

        MSIB88F.tmp

        • Path \Windows\Installer\MSIB88F.tmp
        • Size 45KB
        • SHA256 00514e4ea1164c9ca19309c4e2ecc82b223f9626966cec8d5d2f42179c74fc98
        • MD5 SHA1 SHA512 SSDEEP

        memory/1180-0-0x0000000000400000-0x00000000019A1000-memory.dmp

        memory/1180-99-0x0000000000400000-0x00000000019A1000-memory.dmp

        memory/1180-503-0x0000000000400000-0x00000000019A1000-memory.dmp

        memory/2660-504-0x00000000002C0000-0x00000000002DB000-memory.dmp

        memory/2660-505-0x00000000002C0000-0x00000000002DB000-memory.dmp

        memory/2660-512-0x00000000002C0000-0x00000000002DB000-memory.dmp

        memory/2660-511-0x00000000002C0000-0x00000000002DB000-memory.dmp