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Analysis

  • max time kernel
    154s
  • max time network
    179s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/12/2022, 11:14

General

  • Target

    c4916e4e8c3618bf1ca62a5f00bd2f1ad6ac65b0fb3166ff683c447b527a0bae.exe

  • Size

    388KB

  • MD5

    f889a57591697bde1036a231a29c3207

  • SHA1

    3ba251d27b16bde14c3776d879db5b50166bb72e

  • SHA256

    c4916e4e8c3618bf1ca62a5f00bd2f1ad6ac65b0fb3166ff683c447b527a0bae

  • SHA512

    460f6a087fca6a4d5c594a357ca53502748aad7b73e2d50cbf804ff72cadaa3772c467b5547f8f6c3093265f6082eb09063ce3606f5c26bce4900d5efedf7b09

  • SSDEEP

    6144:CYZTNk3D6LyUXwLLk+cR3qh0GQ43VJRD0ew+/hOvK2o4nFOrz0Ypzu/S8+k7B7:CSNC80I+cR3R03VseXOvc4krwSzW+kt7

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • UAC bypass 3 TTPs 1 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

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

  • Drops autorun.inf file 1 TTPs 1 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 6 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 5 IoCs
  • Modifies Internet Explorer start page 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\fontdrvhost.exe
    "fontdrvhost.exe"
    1⤵
      PID:784
    • C:\Windows\system32\dwm.exe
      "dwm.exe"
      1⤵
        PID:1016
      • C:\Windows\system32\fontdrvhost.exe
        "fontdrvhost.exe"
        1⤵
          PID:792
        • C:\Windows\system32\sihost.exe
          sihost.exe
          1⤵
            PID:2524
          • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
            "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
            1⤵
              PID:3396
            • C:\Windows\System32\RuntimeBroker.exe
              C:\Windows\System32\RuntimeBroker.exe -Embedding
              1⤵
                PID:3460
              • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                1⤵
                  PID:3548
                • C:\Windows\system32\DllHost.exe
                  C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                  1⤵
                    PID:3304
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                    1⤵
                      PID:3100
                    • C:\Windows\Explorer.EXE
                      C:\Windows\Explorer.EXE
                      1⤵
                        PID:740
                        • C:\Users\Admin\AppData\Local\Temp\c4916e4e8c3618bf1ca62a5f00bd2f1ad6ac65b0fb3166ff683c447b527a0bae.exe
                          "C:\Users\Admin\AppData\Local\Temp\c4916e4e8c3618bf1ca62a5f00bd2f1ad6ac65b0fb3166ff683c447b527a0bae.exe"
                          2⤵
                          • Modifies WinLogon for persistence
                          • UAC bypass
                          • Disables RegEdit via registry modification
                          • Adds Run key to start application
                          • Checks whether UAC is enabled
                          • Enumerates connected drives
                          • Drops autorun.inf file
                          • Drops file in System32 directory
                          • Drops file in Program Files directory
                          • Drops file in Windows directory
                          • Modifies Internet Explorer settings
                          • Modifies Internet Explorer start page
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          • System policy modification
                          PID:712
                          • C:\Windows\SysWOW64\cmd.exe
                            C:\Windows\system32\cmd.exe /C AT /delete /yes
                            3⤵
                              PID:4172
                              • C:\Windows\System32\Conhost.exe
                                \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
                                4⤵
                                  PID:3532
                                • C:\Windows\SysWOW64\at.exe
                                  AT /delete /yes
                                  4⤵
                                    PID:4348
                                • C:\Windows\SysWOW64\NOTEPAD.EXE
                                  "C:\Windows\system32\NOTEPAD.EXE"
                                  3⤵
                                    PID:4192
                                  • C:\Windows\SysWOW64\NOTEPAD.EXE
                                    "C:\Windows\system32\NOTEPAD.EXE"
                                    3⤵
                                      PID:4564
                                    • C:\Windows\SysWOW64\cmd.exe
                                      C:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\chrome.exe
                                      3⤵
                                        PID:1848
                                        • C:\Windows\SysWOW64\at.exe
                                          AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\chrome.exe
                                          4⤵
                                            PID:2216
                                        • C:\Windows\SysWOW64\NOTEPAD.EXE
                                          "C:\Windows\system32\NOTEPAD.EXE"
                                          3⤵
                                            PID:3116
                                          • C:\Windows\SysWOW64\NOTEPAD.EXE
                                            "C:\Windows\system32\NOTEPAD.EXE"
                                            3⤵
                                              PID:3052
                                            • C:\Windows\SysWOW64\NOTEPAD.EXE
                                              "C:\Windows\system32\NOTEPAD.EXE"
                                              3⤵
                                                PID:1140
                                              • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                "C:\Windows\system32\NOTEPAD.EXE"
                                                3⤵
                                                  PID:2668
                                                • C:\Windows\SysWOW64\cmd.exe
                                                  C:\Windows\system32\cmd.exe /C cacls "C:\system volume information" /e /g "Admin":f
                                                  3⤵
                                                    PID:1084
                                                    • C:\Windows\System32\Conhost.exe
                                                      \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
                                                      4⤵
                                                        PID:1620
                                                      • C:\Windows\SysWOW64\cacls.exe
                                                        cacls "C:\system volume information" /e /g "Admin":f
                                                        4⤵
                                                          PID:2312
                                                      • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                        "C:\Windows\system32\NOTEPAD.EXE"
                                                        3⤵
                                                          PID:4712
                                                        • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                          "C:\Windows\system32\NOTEPAD.EXE"
                                                          3⤵
                                                            PID:4596
                                                          • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                            "C:\Windows\system32\NOTEPAD.EXE"
                                                            3⤵
                                                              PID:1656
                                                            • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                              "C:\Windows\system32\NOTEPAD.EXE"
                                                              3⤵
                                                                PID:3880
                                                              • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                                "C:\Windows\system32\NOTEPAD.EXE"
                                                                3⤵
                                                                  PID:3412
                                                                • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                                  "C:\Windows\system32\NOTEPAD.EXE"
                                                                  3⤵
                                                                    PID:1536
                                                                  • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                                    "C:\Windows\system32\NOTEPAD.EXE"
                                                                    3⤵
                                                                      PID:4692
                                                                    • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                                      "C:\Windows\system32\NOTEPAD.EXE"
                                                                      3⤵
                                                                        PID:3012
                                                                      • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                                        "C:\Windows\system32\NOTEPAD.EXE"
                                                                        3⤵
                                                                          PID:1776
                                                                        • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                                          "C:\Windows\system32\NOTEPAD.EXE"
                                                                          3⤵
                                                                            PID:3652
                                                                          • C:\Windows\SysWOW64\NOTEPAD.EXE
                                                                            "C:\Windows\system32\NOTEPAD.EXE"
                                                                            3⤵
                                                                              PID:3532
                                                                        • C:\Windows\system32\taskhostw.exe
                                                                          taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                                                                          1⤵
                                                                            PID:2636
                                                                          • C:\Windows\system32\svchost.exe
                                                                            C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
                                                                            1⤵
                                                                              PID:2536
                                                                            • C:\Windows\System32\RuntimeBroker.exe
                                                                              C:\Windows\System32\RuntimeBroker.exe -Embedding
                                                                              1⤵
                                                                                PID:3700
                                                                              • C:\Windows\System32\RuntimeBroker.exe
                                                                                C:\Windows\System32\RuntimeBroker.exe -Embedding
                                                                                1⤵
                                                                                  PID:4540
                                                                                • C:\Windows\system32\backgroundTaskHost.exe
                                                                                  "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
                                                                                  1⤵
                                                                                    PID:376
                                                                                  • C:\Windows\System32\RuntimeBroker.exe
                                                                                    C:\Windows\System32\RuntimeBroker.exe -Embedding
                                                                                    1⤵
                                                                                      PID:2752
                                                                                    • C:\Windows\system32\backgroundTaskHost.exe
                                                                                      "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:CortanaUI.AppX3bn25b6f886wmg6twh46972vprk9tnbf.mca
                                                                                      1⤵
                                                                                        PID:4320
                                                                                      • C:\Windows\system32\BackgroundTransferHost.exe
                                                                                        "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1
                                                                                        1⤵
                                                                                          PID:3144
                                                                                        • C:\Windows\system32\backgroundTaskHost.exe
                                                                                          "C:\Windows\system32\backgroundTaskHost.exe" -ServerName:App.AppXmtcan0h2tfbfy7k9kn8hbxb6dmzz1zh0.mca
                                                                                          1⤵
                                                                                            PID:836

                                                                                          Network

                                                                                          MITRE ATT&CK Enterprise v6

                                                                                          Replay Monitor

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                                                                                          Downloads

                                                                                          • memory/712-132-0x0000000000400000-0x00000000004BE000-memory.dmp

                                                                                            Filesize

                                                                                            760KB

                                                                                          • memory/712-133-0x00000000036D0000-0x00000000046FA000-memory.dmp

                                                                                            Filesize

                                                                                            16.2MB

                                                                                          • memory/712-134-0x00000000036D0000-0x00000000046FA000-memory.dmp

                                                                                            Filesize

                                                                                            16.2MB

                                                                                          • memory/712-135-0x00000000036D0000-0x00000000046FA000-memory.dmp

                                                                                            Filesize

                                                                                            16.2MB

                                                                                          • memory/1140-149-0x00000000010B0000-0x00000000010C4000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/1536-164-0x0000000000620000-0x0000000000634000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/1656-158-0x0000000000900000-0x0000000000914000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/1776-170-0x0000000000620000-0x0000000000634000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/2668-152-0x0000000000E60000-0x0000000000E74000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/3012-168-0x0000000000480000-0x0000000000494000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/3052-147-0x0000000000490000-0x00000000004A4000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/3116-145-0x0000000000860000-0x0000000000874000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/3412-162-0x0000000000DB0000-0x0000000000DC4000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/3532-174-0x0000000000A70000-0x0000000000A84000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/3652-172-0x0000000001040000-0x0000000001054000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/3880-160-0x0000000001220000-0x0000000001234000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/4192-139-0x0000000001030000-0x0000000001044000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/4564-141-0x00000000006B0000-0x00000000006C4000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/4692-166-0x0000000000A20000-0x0000000000A34000-memory.dmp

                                                                                            Filesize

                                                                                            80KB

                                                                                          • memory/4712-154-0x00000000004B0000-0x00000000004C4000-memory.dmp

                                                                                            Filesize

                                                                                            80KB