Resubmissions

02-01-2025 21:33

250102-1ejbvswpcv 10

08-12-2024 01:12

241208-bkq68azkep 10

Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    02-01-2025 21:33

General

  • Target

    k5.exe

  • Size

    76KB

  • MD5

    145c9edca1151d477e5c339b6d797cbd

  • SHA1

    f09d773d50f87c47500305e79bc1e6fcf503ebd6

  • SHA256

    ed989d9d7e04a312dffe2fdd8dd30273d5b07ee56941f1a724b6143752ef42da

  • SHA512

    10f5d6cacbbc96fa22c097f5b519fe1738a5531820518af00cedf8ca9112808bc2c2871845f85f496a1d08695441262ab3ed57068e6d029ec1e5aabdb32d47df

  • SSDEEP

    1536:bcPk2vG+Yq6GrXdOOq52m0HLxEulgsteEY+cZv8FYOicNx1q/6:v2vGM6GLdu52hHL6ulgsteEY+cZ90Nx1

Score
8/10

Malware Config

Signatures

  • Modifies RDP port number used by Windows 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 47 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\wininit.exe
    wininit.exe
    1⤵
      PID:368
      • C:\Windows\system32\services.exe
        C:\Windows\system32\services.exe
        2⤵
          PID:468
          • C:\Windows\system32\svchost.exe
            C:\Windows\system32\svchost.exe -k DcomLaunch
            3⤵
              PID:584
              • C:\Windows\system32\wbem\wmiprvse.exe
                C:\Windows\system32\wbem\wmiprvse.exe
                4⤵
                  PID:1248
                • C:\Windows\system32\DllHost.exe
                  C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                  4⤵
                    PID:1556
                • C:\Windows\system32\svchost.exe
                  C:\Windows\system32\svchost.exe -k RPCSS
                  3⤵
                    PID:664
                  • C:\Windows\System32\svchost.exe
                    C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
                    3⤵
                      PID:748
                    • C:\Windows\System32\svchost.exe
                      C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
                      3⤵
                        PID:792
                        • C:\Windows\system32\Dwm.exe
                          "C:\Windows\system32\Dwm.exe"
                          4⤵
                            PID:1160
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k netsvcs
                          3⤵
                            PID:832
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k LocalService
                            3⤵
                              PID:972
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k NetworkService
                              3⤵
                                PID:268
                              • C:\Windows\System32\spoolsv.exe
                                C:\Windows\System32\spoolsv.exe
                                3⤵
                                  PID:108
                                • C:\Windows\system32\svchost.exe
                                  C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
                                  3⤵
                                    PID:1056
                                  • C:\Windows\system32\taskhost.exe
                                    "taskhost.exe"
                                    3⤵
                                      PID:1092
                                    • C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPSVC.EXE
                                      "C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPSVC.EXE"
                                      3⤵
                                        PID:1240
                                      • C:\Windows\system32\svchost.exe
                                        C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
                                        3⤵
                                          PID:3052
                                        • C:\Windows\system32\sppsvc.exe
                                          C:\Windows\system32\sppsvc.exe
                                          3⤵
                                            PID:2208
                                          • C:\Windows\zmxrwy.exe
                                            C:\Windows\zmxrwy.exe
                                            3⤵
                                            • Executes dropped EXE
                                            • System Location Discovery: System Language Discovery
                                            • Checks processor information in registry
                                            • Suspicious behavior: EnumeratesProcesses
                                            • Suspicious behavior: MapViewOfSection
                                            • Suspicious use of AdjustPrivilegeToken
                                            PID:2876
                                        • C:\Windows\system32\lsass.exe
                                          C:\Windows\system32\lsass.exe
                                          2⤵
                                            PID:476
                                          • C:\Windows\system32\lsm.exe
                                            C:\Windows\system32\lsm.exe
                                            2⤵
                                              PID:484
                                          • C:\Windows\system32\csrss.exe
                                            %SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,20480,768 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ServerDll=sxssrv,4 ProfileControl=Off MaxRequestThreads=16
                                            1⤵
                                              PID:384
                                            • C:\Windows\system32\winlogon.exe
                                              winlogon.exe
                                              1⤵
                                                PID:420
                                              • C:\Windows\Explorer.EXE
                                                C:\Windows\Explorer.EXE
                                                1⤵
                                                  PID:1188
                                                  • C:\Users\Admin\AppData\Local\Temp\k5.exe
                                                    "C:\Users\Admin\AppData\Local\Temp\k5.exe"
                                                    2⤵
                                                    • Drops file in Windows directory
                                                    • System Location Discovery: System Language Discovery
                                                    • Suspicious behavior: EnumeratesProcesses
                                                    • Suspicious behavior: MapViewOfSection
                                                    • Suspicious use of AdjustPrivilegeToken
                                                    • Suspicious use of WriteProcessMemory
                                                    PID:2772

                                                Network

                                                MITRE ATT&CK Enterprise v15

                                                Replay Monitor

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                                                Downloads

                                                • C:\Windows\zmxrwy.exe

                                                  Filesize

                                                  76KB

                                                  MD5

                                                  145c9edca1151d477e5c339b6d797cbd

                                                  SHA1

                                                  f09d773d50f87c47500305e79bc1e6fcf503ebd6

                                                  SHA256

                                                  ed989d9d7e04a312dffe2fdd8dd30273d5b07ee56941f1a724b6143752ef42da

                                                  SHA512

                                                  10f5d6cacbbc96fa22c097f5b519fe1738a5531820518af00cedf8ca9112808bc2c2871845f85f496a1d08695441262ab3ed57068e6d029ec1e5aabdb32d47df

                                                • memory/2772-0-0x0000000000400000-0x0000000000414000-memory.dmp

                                                  Filesize

                                                  80KB

                                                • memory/2772-1-0x0000000077E6F000-0x0000000077E70000-memory.dmp

                                                  Filesize

                                                  4KB

                                                • memory/2772-2-0x0000000077E70000-0x0000000077E71000-memory.dmp

                                                  Filesize

                                                  4KB

                                                • memory/2772-5-0x0000000077E70000-0x0000000077E71000-memory.dmp

                                                  Filesize

                                                  4KB

                                                • memory/2772-6-0x0000000077E6F000-0x0000000077E70000-memory.dmp

                                                  Filesize

                                                  4KB

                                                • memory/2772-7-0x000000007EF90000-0x000000007EF9C000-memory.dmp

                                                  Filesize

                                                  48KB

                                                • memory/2772-8-0x0000000000400000-0x0000000000414000-memory.dmp

                                                  Filesize

                                                  80KB

                                                • memory/2876-9-0x0000000000400000-0x0000000000414000-memory.dmp

                                                  Filesize

                                                  80KB