Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220414-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/07/2022, 04:08

General

  • Target
    54b2bd4c6396ff50acd1710dbef840bf.dll
  • Size 5.0MB
  • Sample220720-ep92nsccbk
  • SHA256 83d1b64a9bca34640ec3722e9ef0dcb18669ec1b5a866f4e7517e760005b7d73
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Modifies firewall policy service 2 TTPs 4 IoCs
  • Wannacry

    WannaCry is a ransomware cryptoworm.

  • Contacts a large (3163) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Executes dropped EXE 2 IoCs
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

  • Drops file in Windows directory 2 IoCs
  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: MapViewOfSection 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\lsass.exe
    C:\Windows\system32\lsass.exe
    1⤵
      PID:684
    • C:\Windows\system32\winlogon.exe
      winlogon.exe
      1⤵
        PID:628
        • C:\Windows\system32\dwm.exe
          "dwm.exe"
          2⤵
            PID:316
          • C:\Windows\system32\fontdrvhost.exe
            "fontdrvhost.exe"
            2⤵
              PID:804
          • C:\Windows\system32\svchost.exe
            C:\Windows\system32\svchost.exe -k DcomLaunch -p
            1⤵
              PID:788
              • C:\Windows\System32\RuntimeBroker.exe
                C:\Windows\System32\RuntimeBroker.exe -Embedding
                2⤵
                  PID:3412
                • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                  "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                  2⤵
                    PID:3348
                  • C:\Windows\System32\RuntimeBroker.exe
                    C:\Windows\System32\RuntimeBroker.exe -Embedding
                    2⤵
                      PID:3708
                    • C:\Windows\system32\backgroundTaskHost.exe
                      "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
                      2⤵
                        PID:4648
                      • C:\Windows\System32\RuntimeBroker.exe
                        C:\Windows\System32\RuntimeBroker.exe -Embedding
                        2⤵
                          PID:2076
                        • C:\Windows\system32\wbem\wmiprvse.exe
                          C:\Windows\system32\wbem\wmiprvse.exe
                          2⤵
                            PID:2668
                          • C:\Windows\system32\backgroundTaskHost.exe
                            "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppX53ypgrj20bgndg05hj3tc7z654myszwp.mca
                            2⤵
                              PID:4652
                            • C:\Windows\system32\SppExtComObj.exe
                              C:\Windows\system32\SppExtComObj.exe -Embedding
                              2⤵
                                PID:1372
                              • C:\Windows\System32\RuntimeBroker.exe
                                C:\Windows\System32\RuntimeBroker.exe -Embedding
                                2⤵
                                  PID:3132
                                • C:\Windows\system32\DllHost.exe
                                  C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                                  2⤵
                                    PID:3860
                                  • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                                    "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                                    2⤵
                                      PID:3492
                                    • C:\Windows\system32\DllHost.exe
                                      C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                                      2⤵
                                        PID:3260
                                    • C:\Windows\system32\fontdrvhost.exe
                                      "fontdrvhost.exe"
                                      1⤵
                                        PID:796
                                      • C:\Windows\system32\svchost.exe
                                        C:\Windows\system32\svchost.exe -k RPCSS -p
                                        1⤵
                                          PID:912
                                        • C:\Windows\system32\svchost.exe
                                          C:\Windows\system32\svchost.exe -k DcomLaunch -p -s LSM
                                          1⤵
                                            PID:964
                                          • C:\Windows\system32\svchost.exe
                                            C:\Windows\system32\svchost.exe -k netsvcs -p -s gpsvc
                                            1⤵
                                              PID:532
                                            • C:\Windows\system32\svchost.exe
                                              C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork -p
                                              1⤵
                                                PID:928
                                              • C:\Windows\System32\svchost.exe
                                                C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s lmhosts
                                                1⤵
                                                  PID:824
                                                • C:\Windows\system32\svchost.exe
                                                  C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s TimeBrokerSvc
                                                  1⤵
                                                    PID:1052
                                                  • C:\Windows\System32\svchost.exe
                                                    C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s NcbService
                                                    1⤵
                                                      PID:1068
                                                    • C:\Windows\system32\svchost.exe
                                                      C:\Windows\system32\svchost.exe -k netsvcs -p -s Schedule
                                                      1⤵
                                                        PID:1148
                                                        • C:\Windows\system32\taskhostw.exe
                                                          taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                                                          2⤵
                                                            PID:2616
                                                        • C:\Windows\system32\svchost.exe
                                                          C:\Windows\system32\svchost.exe -k netsvcs -p -s ProfSvc
                                                          1⤵
                                                            PID:1188
                                                          • C:\Windows\system32\svchost.exe
                                                            C:\Windows\system32\svchost.exe -k LocalService -p -s DispBrokerDesktopSvc
                                                            1⤵
                                                              PID:1248
                                                            • C:\Windows\System32\svchost.exe
                                                              C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s EventLog
                                                              1⤵
                                                                PID:1276
                                                              • C:\Windows\system32\svchost.exe
                                                                C:\Windows\system32\svchost.exe -k netsvcs -p -s UserManager
                                                                1⤵
                                                                  PID:1288
                                                                  • C:\Windows\system32\sihost.exe
                                                                    sihost.exe
                                                                    2⤵
                                                                      PID:2424
                                                                  • C:\Windows\system32\svchost.exe
                                                                    C:\Windows\system32\svchost.exe -k LocalService -p -s EventSystem
                                                                    1⤵
                                                                      PID:1420
                                                                    • C:\Windows\System32\svchost.exe
                                                                      C:\Windows\System32\svchost.exe -k netsvcs -p -s Themes
                                                                      1⤵
                                                                        PID:1432
                                                                      • C:\Windows\system32\svchost.exe
                                                                        C:\Windows\system32\svchost.exe -k LocalService -p -s nsi
                                                                        1⤵
                                                                          PID:1444
                                                                        • C:\Windows\system32\svchost.exe
                                                                          C:\Windows\system32\svchost.exe -k netsvcs -p -s SENS
                                                                          1⤵
                                                                            PID:1584
                                                                          • C:\Windows\system32\svchost.exe
                                                                            C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s Dhcp
                                                                            1⤵
                                                                              PID:1600
                                                                            • C:\Windows\system32\svchost.exe
                                                                              C:\Windows\system32\svchost.exe -k LocalService -p -s FontCache
                                                                              1⤵
                                                                                PID:1656
                                                                              • C:\Windows\System32\svchost.exe
                                                                                C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p
                                                                                1⤵
                                                                                  PID:1788
                                                                                • C:\Windows\System32\svchost.exe
                                                                                  C:\Windows\System32\svchost.exe -k NetworkService -p -s NlaSvc
                                                                                  1⤵
                                                                                    PID:1704
                                                                                  • C:\Windows\system32\svchost.exe
                                                                                    C:\Windows\system32\svchost.exe -k NetworkService -p -s Dnscache
                                                                                    1⤵
                                                                                      PID:1916
                                                                                    • C:\Windows\System32\svchost.exe
                                                                                      C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p
                                                                                      1⤵
                                                                                        PID:1928
                                                                                      • C:\Windows\System32\svchost.exe
                                                                                        C:\Windows\System32\svchost.exe -k netsvcs -p -s ShellHWDetection
                                                                                        1⤵
                                                                                          PID:2008
                                                                                        • C:\Windows\System32\spoolsv.exe
                                                                                          C:\Windows\System32\spoolsv.exe
                                                                                          1⤵
                                                                                            PID:1860
                                                                                          • C:\Windows\System32\svchost.exe
                                                                                            C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -s RmSvc
                                                                                            1⤵
                                                                                              PID:2080
                                                                                            • C:\Windows\system32\svchost.exe
                                                                                              C:\Windows\system32\svchost.exe -k LocalServiceNoNetworkFirewall -p
                                                                                              1⤵
                                                                                                PID:2064
                                                                                              • C:\Windows\system32\svchost.exe
                                                                                                C:\Windows\system32\svchost.exe -k netsvcs -p -s IKEEXT
                                                                                                1⤵
                                                                                                  PID:2376
                                                                                                • C:\Windows\System32\svchost.exe
                                                                                                  C:\Windows\System32\svchost.exe -k LocalService -p -s LicenseManager
                                                                                                  1⤵
                                                                                                    PID:828
                                                                                                  • C:\Windows\System32\svchost.exe
                                                                                                    C:\Windows\System32\svchost.exe -k netsvcs -p
                                                                                                    1⤵
                                                                                                      PID:4852
                                                                                                    • C:\Windows\system32\svchost.exe
                                                                                                      C:\Windows\system32\svchost.exe -k netsvcs -p -s wlidsvc
                                                                                                      1⤵
                                                                                                        PID:4140
                                                                                                      • C:\Windows\system32\svchost.exe
                                                                                                        C:\Windows\system32\svchost.exe -k LocalService -s W32Time
                                                                                                        1⤵
                                                                                                          PID:3208
                                                                                                        • C:\Windows\system32\svchost.exe
                                                                                                          C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s WinHttpAutoProxySvc
                                                                                                          1⤵
                                                                                                            PID:1676
                                                                                                          • C:\Windows\system32\svchost.exe
                                                                                                            C:\Windows\system32\svchost.exe -k LocalService -p -s CDPSvc
                                                                                                            1⤵
                                                                                                              PID:536
                                                                                                            • C:\Windows\System32\svchost.exe
                                                                                                              C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s StorSvc
                                                                                                              1⤵
                                                                                                                PID:4660
                                                                                                              • C:\Windows\system32\svchost.exe
                                                                                                                C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                                                                                                                1⤵
                                                                                                                  PID:8
                                                                                                                • C:\Windows\Explorer.EXE
                                                                                                                  C:\Windows\Explorer.EXE
                                                                                                                  1⤵
                                                                                                                    PID:1880
                                                                                                                    • C:\Windows\system32\rundll32.exe
                                                                                                                      rundll32.exe C:\Users\Admin\AppData\Local\Temp\54b2bd4c6396ff50acd1710dbef840bf.dll,#1
                                                                                                                      2⤵
                                                                                                                      • Suspicious use of WriteProcessMemory
                                                                                                                      PID:460
                                                                                                                      • C:\Windows\SysWOW64\rundll32.exe
                                                                                                                        rundll32.exe C:\Users\Admin\AppData\Local\Temp\54b2bd4c6396ff50acd1710dbef840bf.dll,#1
                                                                                                                        3⤵
                                                                                                                        • Drops file in Windows directory
                                                                                                                        • Suspicious use of WriteProcessMemory
                                                                                                                        PID:4544
                                                                                                                        • C:\WINDOWS\mssecsvc.exe
                                                                                                                          C:\WINDOWS\mssecsvc.exe
                                                                                                                          4⤵
                                                                                                                          • Modifies firewall policy service
                                                                                                                          • Executes dropped EXE
                                                                                                                          • Drops file in Windows directory
                                                                                                                          • Suspicious behavior: EnumeratesProcesses
                                                                                                                          • Suspicious behavior: MapViewOfSection
                                                                                                                          • Suspicious use of AdjustPrivilegeToken
                                                                                                                          • Suspicious use of WriteProcessMemory
                                                                                                                          PID:4564
                                                                                                                          • C:\Windows\SysWOW64\WerFault.exe
                                                                                                                            C:\Windows\SysWOW64\WerFault.exe -u -p 4564 -s 1260
                                                                                                                            5⤵
                                                                                                                            • Program crash
                                                                                                                            PID:5024
                                                                                                                  • C:\Windows\system32\svchost.exe
                                                                                                                    C:\Windows\system32\svchost.exe -k netsvcs -p -s WpnService
                                                                                                                    1⤵
                                                                                                                      PID:2696
                                                                                                                    • C:\Windows\system32\svchost.exe
                                                                                                                      C:\Windows\system32\svchost.exe -k netsvcs -p -s Winmgmt
                                                                                                                      1⤵
                                                                                                                        PID:2684
                                                                                                                      • C:\Windows\System32\svchost.exe
                                                                                                                        C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s TrkWks
                                                                                                                        1⤵
                                                                                                                          PID:2660
                                                                                                                        • C:\Windows\system32\svchost.exe
                                                                                                                          C:\Windows\system32\svchost.exe -k netsvcs -p -s LanmanServer
                                                                                                                          1⤵
                                                                                                                            PID:2636
                                                                                                                          • C:\Windows\system32\svchost.exe
                                                                                                                            C:\Windows\system32\svchost.exe -k NetworkService -p -s CryptSvc
                                                                                                                            1⤵
                                                                                                                              PID:2572
                                                                                                                            • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe
                                                                                                                              "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service
                                                                                                                              1⤵
                                                                                                                                PID:2556
                                                                                                                              • C:\Windows\system32\svchost.exe
                                                                                                                                C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
                                                                                                                                1⤵
                                                                                                                                  PID:2440
                                                                                                                                • C:\Windows\system32\svchost.exe
                                                                                                                                  C:\Windows\system32\svchost.exe -k NetworkServiceNetworkRestricted -p -s PolicyAgent
                                                                                                                                  1⤵
                                                                                                                                    PID:2368
                                                                                                                                  • C:\Windows\System32\svchost.exe
                                                                                                                                    C:\Windows\System32\svchost.exe -k NetworkService -p -s LanmanWorkstation
                                                                                                                                    1⤵
                                                                                                                                      PID:2152
                                                                                                                                    • C:\Windows\system32\svchost.exe
                                                                                                                                      C:\Windows\system32\svchost.exe -k appmodel -p -s StateRepository
                                                                                                                                      1⤵
                                                                                                                                        PID:2000
                                                                                                                                      • C:\Windows\System32\svchost.exe
                                                                                                                                        C:\Windows\System32\svchost.exe -k LocalService -p -s netprofm
                                                                                                                                        1⤵
                                                                                                                                          PID:1852
                                                                                                                                        • C:\Windows\System32\svchost.exe
                                                                                                                                          C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s AudioEndpointBuilder
                                                                                                                                          1⤵
                                                                                                                                            PID:1640
                                                                                                                                          • C:\WINDOWS\mssecsvc.exe
                                                                                                                                            C:\WINDOWS\mssecsvc.exe -m security
                                                                                                                                            1⤵
                                                                                                                                            • Executes dropped EXE
                                                                                                                                            • Suspicious behavior: EnumeratesProcesses
                                                                                                                                            • Suspicious use of AdjustPrivilegeToken
                                                                                                                                            PID:2472
                                                                                                                                          • C:\Windows\SysWOW64\WerFault.exe
                                                                                                                                            C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4564 -ip 4564
                                                                                                                                            1⤵
                                                                                                                                              PID:4248

                                                                                                                                            Network

                                                                                                                                                  MITRE ATT&CK Enterprise v6

                                                                                                                                                  Replay Monitor

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                                                                                                                                                  Downloads

                                                                                                                                                  mssecsvc.exe

                                                                                                                                                  • Path C:\WINDOWS\mssecsvc.exe
                                                                                                                                                  • Size 3.6MB
                                                                                                                                                  • SHA256 70b302603bf9b3af5cdaf530cb10a15c95376e5dad58c0f84d1054d1289c50ba
                                                                                                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                                                                                                  mssecsvc.exe

                                                                                                                                                  • Path C:\Windows\mssecsvc.exe
                                                                                                                                                  • Size 3.6MB
                                                                                                                                                  • SHA256 70b302603bf9b3af5cdaf530cb10a15c95376e5dad58c0f84d1054d1289c50ba
                                                                                                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                                                                                                  mssecsvc.exe

                                                                                                                                                  • Path C:\Windows\mssecsvc.exe
                                                                                                                                                  • Size 3.6MB
                                                                                                                                                  • SHA256 70b302603bf9b3af5cdaf530cb10a15c95376e5dad58c0f84d1054d1289c50ba
                                                                                                                                                  • MD5 SHA1 SHA512 SSDEEP

                                                                                                                                                  memory/2472-136-0x0000000000400000-0x0000000000A73000-memory.dmp

                                                                                                                                                  memory/2472-140-0x0000000000400000-0x0000000000A73000-memory.dmp

                                                                                                                                                  memory/4564-134-0x0000000000400000-0x0000000000A73000-memory.dmp

                                                                                                                                                  memory/4564-137-0x000000007FE30000-0x000000007FE3C000-memory.dmp

                                                                                                                                                  memory/4564-138-0x0000000000400000-0x0000000000A73000-memory.dmp

                                                                                                                                                  memory/4564-139-0x000000007FE30000-0x000000007FE3C000-memory.dmp