Resubmissions

02/03/2024, 22:38

240302-2kwptaae3710

02/03/2024, 22:34

240302-2g86qsad9610

Analysis

  • max time kernel
    942s
  • max time network
    950s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    02/03/2024, 22:38

Errors

Reason
Machine shutdown

General

  • Target
    Fake AV/PCDefender.exe
  • Size 878KB
  • Sample240302-2kwptaae37
  • SHA256 5ae57d8750822c203f5bf5e241c7132377b250df36a215dff2f396c8440b82dd
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 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 62 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 32 IoCs
  • Suspicious use of SendNotifyMessage 30 IoCs
  • Suspicious use of SetWindowsHookEx 21 IoCs
  • Suspicious use of WriteProcessMemory 46 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:2020
    • 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:2312
  • 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:2968
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 2EFC51A00FF5DF89ADBAE9431B9F1281 M Global\MSI0000
      2⤵
      • Modifies WinLogon for persistence
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1508
      • 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:1572
      • 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:1444
      • 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⤵
          PID:2280
        • 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:2820
        • 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
          • 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:2088
          • 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:1184
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c shutdown -r -t 10
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:364
            • C:\Windows\SysWOW64\shutdown.exe
              shutdown -r -t 10
              5⤵
                PID:836
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2808
      • C:\Windows\system32\DrvInst.exe
        DrvInst.exe "1" "200" "STORAGE\VolumeSnapshot\HarddiskVolumeSnapshot19" "" "" "61530dda3" "0000000000000000" "00000000000005C8" "00000000000005C4"
        1⤵
        • Drops file in Windows directory
        • Modifies data under HKEY_USERS
        • Suspicious use of AdjustPrivilegeToken
        PID:2892
      • C:\Windows\system32\LogonUI.exe
        "LogonUI.exe" /flags:0x0
        1⤵
          PID:2524
        • C:\Windows\system32\LogonUI.exe
          "LogonUI.exe" /flags:0x1
          1⤵
            PID:1780

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

                f76dd0a.rbs

                • Path C:\Config.Msi\f76dd0a.rbs
                • Size 9KB
                • SHA256 126c710e52d36c6845f721aba2b5ec15b31c3d185f50a1795578d2d77c59b327
                • MD5 SHA1 SHA512 SSDEEP

                Antispyware.exe

                • Path C:\Program Files (x86)\Def Group\PC Defender\Antispyware.exe
                • Size 132KB
                • SHA256 576083d5ce4054ef2e7d8d6bd436e7be9ee367fb1e48a9ad52d430b68eedc343
                • MD5 SHA1 SHA512 SSDEEP

                hook.dll

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

                PCDefenderSilentSetup.msi

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

                Antispyware.exe

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

                proccheck.exe

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

                memory/1508-26-0x0000000000280000-0x0000000000282000-memory.dmp

                memory/1780-129-0x0000000002760000-0x0000000002761000-memory.dmp

                memory/2524-128-0x00000000029C0000-0x00000000029C1000-memory.dmp