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Analysis

  • max time kernel
    154s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/09/2022, 15:43

General

  • Target

    5d6b895e208226d99be411502f243df8a6cd56d536d17bbd7f4e8a89cb407d4a.exe

  • Size

    416KB

  • MD5

    2bbb76dfa85550ef8f69f58006efb410

  • SHA1

    6811ec43e5216065ef28f4c88ad7717057cc1b07

  • SHA256

    5d6b895e208226d99be411502f243df8a6cd56d536d17bbd7f4e8a89cb407d4a

  • SHA512

    20b9e00fa199192370772cc98bee0eb9e152f1650d8e15f91fdd5e79b24d516e2f9428de3d6bb7939cd857a9dd20896c03b58fd6750989dfa167d3e61edb5d5e

  • SSDEEP

    12288:elQ8fXEBvuwjInnLEzRi1Al/P9QpNZ4PuYu7:ehEBWwMLgiU/PSrZ4PuT7

Malware Config

Extracted

Family

sality

C2

http://89.119.67.154/testo5/

http://kukutrustnet777.info/home.gif

http://kukutrustnet888.info/home.gif

http://kukutrustnet987.info/home.gif

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Sality

    Sality is backdoor written in C++, first discovered in 2003.

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 6 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • UPX packed file 4 IoCs

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

  • Windows security modification 2 TTPs 7 IoCs
  • 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.

  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 8 IoCs
  • Drops file in Program Files directory 11 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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:788
    • C:\Windows\system32\dwm.exe
      "dwm.exe"
      1⤵
        PID:332
      • C:\Windows\system32\sihost.exe
        sihost.exe
        1⤵
          PID:2372
        • C:\Windows\system32\taskhostw.exe
          taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
          1⤵
            PID:2476
          • C:\Windows\Explorer.EXE
            C:\Windows\Explorer.EXE
            1⤵
              PID:2228
              • C:\Users\Admin\AppData\Local\Temp\5d6b895e208226d99be411502f243df8a6cd56d536d17bbd7f4e8a89cb407d4a.exe
                "C:\Users\Admin\AppData\Local\Temp\5d6b895e208226d99be411502f243df8a6cd56d536d17bbd7f4e8a89cb407d4a.exe"
                2⤵
                • Modifies WinLogon for persistence
                • UAC bypass
                • Windows security bypass
                • Disables RegEdit via registry modification
                • Windows security modification
                • Adds Run key to start application
                • Checks whether UAC is enabled
                • Enumerates connected drives
                • Drops file in System32 directory
                • Drops file in Program Files directory
                • Drops file in Windows directory
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                • System policy modification
                PID:4808
                • C:\Windows\SysWOW64\netsh.exe
                  netsh firewall set opmode disable
                  3⤵
                  • Modifies Windows Firewall
                  PID:3184
                • C:\Windows\SysWOW64\cmd.exe
                  C:\Windows\system32\cmd.exe /C AT /delete /yes
                  3⤵
                  • Suspicious use of WriteProcessMemory
                  PID:4292
                  • C:\Windows\SysWOW64\at.exe
                    AT /delete /yes
                    4⤵
                      PID:3448
                  • 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\blastclnnn.exe
                    3⤵
                    • Suspicious use of WriteProcessMemory
                    PID:1136
                    • C:\Windows\SysWOW64\at.exe
                      AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\blastclnnn.exe
                      4⤵
                        PID:4752
                    • C:\Windows\SysWOW64\NOTEPAD.EXE
                      "C:\Windows\system32\NOTEPAD.EXE"
                      3⤵
                        PID:5116
                      • C:\Windows\SysWOW64\NOTEPAD.EXE
                        "C:\Windows\system32\NOTEPAD.EXE"
                        3⤵
                          PID:4428
                        • C:\Windows\SysWOW64\NOTEPAD.EXE
                          "C:\Windows\system32\NOTEPAD.EXE"
                          3⤵
                            PID:1104
                      • C:\Windows\System32\RuntimeBroker.exe
                        C:\Windows\System32\RuntimeBroker.exe -Embedding
                        1⤵
                          PID:3512
                        • C:\Windows\System32\RuntimeBroker.exe
                          C:\Windows\System32\RuntimeBroker.exe -Embedding
                          1⤵
                            PID:3824
                          • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                            "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                            1⤵
                              PID:3620
                            • C:\Windows\System32\RuntimeBroker.exe
                              C:\Windows\System32\RuntimeBroker.exe -Embedding
                              1⤵
                                PID:4700
                              • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                                "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                                1⤵
                                  PID:3404
                                • C:\Windows\system32\DllHost.exe
                                  C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                                  1⤵
                                    PID:3308
                                  • C:\Windows\system32\svchost.exe
                                    C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                                    1⤵
                                      PID:3108
                                    • C:\Windows\system32\svchost.exe
                                      C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
                                      1⤵
                                        PID:2380
                                      • C:\Windows\system32\fontdrvhost.exe
                                        "fontdrvhost.exe"
                                        1⤵
                                          PID:780

                                        Network

                                        MITRE ATT&CK Enterprise v6

                                        Replay Monitor

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                                        Downloads

                                        • memory/1104-146-0x0000000000F60000-0x0000000000F77000-memory.dmp

                                          Filesize

                                          92KB

                                        • memory/4428-144-0x0000000000290000-0x00000000002A7000-memory.dmp

                                          Filesize

                                          92KB

                                        • memory/4808-140-0x0000000003360000-0x0000000004393000-memory.dmp

                                          Filesize

                                          16.2MB

                                        • memory/4808-139-0x0000000000400000-0x00000000004A7000-memory.dmp

                                          Filesize

                                          668KB

                                        • memory/4808-132-0x0000000000400000-0x00000000004A7000-memory.dmp

                                          Filesize

                                          668KB

                                        • memory/4808-133-0x0000000003360000-0x0000000004393000-memory.dmp

                                          Filesize

                                          16.2MB

                                        • memory/5116-142-0x0000000000130000-0x0000000000147000-memory.dmp

                                          Filesize

                                          92KB