Resubmissions

02/03/2024, 22:38

240302-2kwptaae3710

02/03/2024, 22:34

240302-2g86qsad9610

Analysis

  • max time kernel
    148s
  • max time network
    159s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    02/03/2024, 22:34

General

  • Target
    Fake AV/PCDefender.exe
  • Size 878KB
  • Sample240302-2g86qsad96
  • SHA256 5ae57d8750822c203f5bf5e241c7132377b250df36a215dff2f396c8440b82dd
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Drops file in Program Files directory 3 IoCs
  • Drops file in Windows directory 14 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 9 IoCs
  • Suspicious use of SendNotifyMessage 6 IoCs
  • Suspicious use of SetWindowsHookEx 22 IoCs
  • Suspicious use of WriteProcessMemory 45 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Fake AV\PCDefender.exe
    "C:\Users\Admin\AppData\Local\Temp\Fake AV\PCDefender.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2292
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\RarSFX0\PCDefenderSilentSetup.msi"
      2⤵
      • Enumerates connected drives
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:1636
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • 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:2660
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding D03C52A3A4BAC024271885A7D74981C4 M Global\MSI0000
      2⤵
      • Modifies WinLogon for persistence
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1660
      • C:\Windows\SysWOW64\reg.exe
        "C:\Windows\SysWOW64\reg.exe" COPY HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\E8CBA2CF517323A48B5B5539084F2528 HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\E8CBA2CF517323A48B5B5539084F2528_ /s /f
        3⤵
        • Modifies registry class
        PID:344
      • C:\Windows\SysWOW64\reg.exe
        "C:\Windows\SysWOW64\reg.exe" COPY HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\E8CBA2CF517323A48B5B5539084F2528 HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\E8CBA2CF517323A48B5B5539084F2528_ /s /f
        3⤵
        • Modifies registry class
        PID:1500
      • C:\Windows\SysWOW64\reg.exe
        "C:\Windows\SysWOW64\reg.exe" COPY HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\E8CBA2CF517323A48B5B5539084F2528 HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\E8CBA2CF517323A48B5B5539084F2528_ /s /f
        3⤵
        • Modifies registry class
        PID:820
      • C:\Windows\SysWOW64\reg.exe
        "C:\Windows\SysWOW64\reg.exe" DELETE HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\E8CBA2CF517323A48B5B5539084F2528 /f
        3⤵
        • Modifies registry class
        PID:3032
      • C:\Program Files (x86)\Def Group\PC Defender\Antispyware.exe
        "C:\Program Files (x86)\Def Group\PC Defender\Antispyware.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks whether UAC is enabled
        • Modifies data under HKEY_USERS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2824
        • C:\Program Files (x86)\Def Group\PC Defender\proccheck.exe
          "C:\Program Files (x86)\Def Group\PC Defender\proccheck.exe" Antispyware.exe
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:1148
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2520
  • C:\Windows\system32\DrvInst.exe
    DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "00000000000005BC" "00000000000004A0"
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:2896
  • C:\Program Files\Internet Explorer\iexplore.exe
    "C:\Program Files\Internet Explorer\iexplore.exe" -startmediumtab -Embedding
    1⤵
    • Drops desktop.ini file(s)
    • Modifies data under HKEY_USERS
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1752
    • C:\Windows\System32\ie4uinit.exe
      "C:\Windows\System32\ie4uinit.exe" -ShowQLIcon
      2⤵
        PID:1700
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1752 CREDAT:275457 /prefetch:2
        2⤵
        • Modifies data under HKEY_USERS
        • Suspicious use of SetWindowsHookEx
        PID:2144
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1752 CREDAT:537612 /prefetch:2
        2⤵
          PID:2560
        • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
          "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1752 CREDAT:275482 /prefetch:2
          2⤵
            PID:2128

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              f76c19e.rbs

              • Path C:\Config.Msi\f76c19e.rbs
              • Size 9KB
              • SHA256 24b9d981a3d19e77963e826656db1ef21f0d15caa89d2a5575c3c6a56d43162f
              • MD5 SHA1 SHA512 SSDEEP

              Antispyware.exe

              • Path C:\Program Files (x86)\Def Group\PC Defender\Antispyware.exe
              • Size 1.4MB
              • SHA256 41922380e3a419fea5a794a16e7abe3364c08da6c66fca0ce8f37c20e21ede68
              • MD5 SHA1 SHA512 SSDEEP

              proccheck.exe

              • Path C:\Program Files (x86)\Def Group\PC Defender\proccheck.exe
              • Size 88KB
              • SHA256 8212f98e9caedd00bab3c3d561055507cd617cc2b2151c956968caeccde66e11
              • MD5 SHA1 SHA512 SSDEEP

              Cab95CA.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Cab95CA.tmp
              • Size 67KB
              • SHA256 b42dc237e44cbc9a43400e7d3f9cbd406dbdefd62bfe87328f8663897d69df78
              • MD5 SHA1 SHA512 SSDEEP

              PCDefenderSilentSetup.msi

              • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\PCDefenderSilentSetup.msi
              • Size 870KB
              • SHA256 586f9a9af50b2a3321e77d2b4583741cc4842967af9429cc371534f7179caec4
              • MD5 SHA1 SHA512 SSDEEP

              Tar96E8.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\Tar96E8.tmp
              • Size 175KB
              • SHA256 a6752b7851b591550e4625b832a393aabcc428de18d83e8593cd540f7d7cae22
              • MD5 SHA1 SHA512 SSDEEP

              07CEF2F654E3ED6050FFC9B6EB844250_BACC6CD2B29F18349081C9FD2343833B

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_BACC6CD2B29F18349081C9FD2343833B
              • Size 2KB
              • SHA256 06afcdd746b7d79c8929ae2f1dd7b5ce521bd7becd1fdfe221c9474627239c5f
              • MD5 SHA1 SHA512

              6BADA8974A10C4BD62CC921D13E43B18_28DEA62A0AE77228DD387E155AD0BA27

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\6BADA8974A10C4BD62CC921D13E43B18_28DEA62A0AE77228DD387E155AD0BA27
              • Size 1KB
              • SHA256 b2a94ad1cd5e92532171096eeeeda1a01a2408ebf0d636cba969338a8ee67edf
              • MD5 SHA1 SHA512

              B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
              • Size 1KB
              • SHA256 41f0a1b15dd35c2d25442b17bf16602cdaddbea176765b01e8633b20c7edd544
              • MD5 SHA1 SHA512

              F0ACCF77CDCBFF39F6191887F6D2D357

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357
              • Size 1KB
              • SHA256 df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e
              • MD5 SHA1 SHA512

              07CEF2F654E3ED6050FFC9B6EB844250_BACC6CD2B29F18349081C9FD2343833B

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_BACC6CD2B29F18349081C9FD2343833B
              • Size 488B
              • SHA256 8869fdd49509413447a06499efdc58e1275fc968fa58a04a1af642673d549a3e
              • MD5 SHA1 SHA512

              07CEF2F654E3ED6050FFC9B6EB844250_BACC6CD2B29F18349081C9FD2343833B

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_BACC6CD2B29F18349081C9FD2343833B
              • Size 488B
              • SHA256 19210beb9db1cae789065cffbd767bbf5c932b031d15a51bca1e4fd602009020
              • MD5 SHA1 SHA512

              6BADA8974A10C4BD62CC921D13E43B18_28DEA62A0AE77228DD387E155AD0BA27

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\6BADA8974A10C4BD62CC921D13E43B18_28DEA62A0AE77228DD387E155AD0BA27
              • Size 408B
              • SHA256 1ccfe9d47acaf0038f8dc13d214d23dccbbe48e0b8c5461c903443fb1e644402
              • MD5 SHA1 SHA512

              6BADA8974A10C4BD62CC921D13E43B18_28DEA62A0AE77228DD387E155AD0BA27

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\6BADA8974A10C4BD62CC921D13E43B18_28DEA62A0AE77228DD387E155AD0BA27
              • Size 408B
              • SHA256 ba5d5e0bfb584469b6a710ad8a6dbff91f88aa53f4a74049cfad16f3e1d365d8
              • MD5 SHA1 SHA512

              94308059B57B3142E455B38A6EB92015

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
              • Size 344B
              • SHA256 993e4ed452681c71c09a020f6dc286d31874775fb9adbc98728bc20827e6cf0e
              • MD5 SHA1 SHA512

              94308059B57B3142E455B38A6EB92015

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
              • Size 344B
              • SHA256 f5e4ffe7bb46407aaee8789b6428dbbf0311957f63a23500b21bc6217f018d68
              • MD5 SHA1 SHA512

              94308059B57B3142E455B38A6EB92015

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
              • Size 344B
              • SHA256 7b2270e1167fc804237a32fad034394a785b1a406fcc13e1643f072a5de28dc7
              • MD5 SHA1 SHA512

              94308059B57B3142E455B38A6EB92015

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
              • Size 344B
              • SHA256 b128cc5ab1bd55d27d9a6675cd7e61fa59f65e4181946104775a4bb2295c4f21
              • MD5 SHA1 SHA512

              94308059B57B3142E455B38A6EB92015

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
              • Size 344B
              • SHA256 135ede8e1351c764b4a381687f8203ea86432a1ba072e81297c80675edc4c1cd
              • MD5 SHA1 SHA512

              94308059B57B3142E455B38A6EB92015

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
              • Size 344B
              • SHA256 18fa8a791d338e48d2eb17759be9dc042a312909f3a6ac90e43afb931d47a87d
              • MD5 SHA1 SHA512

              B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
              • Size 482B
              • SHA256 ab0a0626af2d84239698869118d3302d8184c421094c1ebbf38fa9475ee9bb47
              • MD5 SHA1 SHA512

              F0ACCF77CDCBFF39F6191887F6D2D357

              • Path C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357
              • Size 242B
              • SHA256 b115366d00d960c96f2c54ce06f7b8af704cb2566182cdf75e29cf9576661dc5
              • MD5 SHA1 SHA512

              hook.dll

              • Path \Program Files (x86)\Def Group\PC Defender\hook.dll
              • Size 41KB
              • SHA256 e69c437e565390cbc0209e7934136cc68a7caa07cf7341c870dac35ca549b225
              • MD5 SHA1 SHA512 SSDEEP

              memory/1660-26-0x0000000000280000-0x0000000000282000-memory.dmp

              memory/2824-167-0x0000000002530000-0x0000000002532000-memory.dmp