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Analysis

  • max time kernel
    52s
  • 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
    03/10/2022, 18:28

General

  • Target

    42671db146deab97ebbe7a554502d0467db6e79656d63adf77f7e1b5dc7d376b.exe

  • Size

    236KB

  • MD5

    3570fcb1c153163194b558d0db591250

  • SHA1

    794b170a924cee2a9349b11f8ab11e40ffd7ef5f

  • SHA256

    42671db146deab97ebbe7a554502d0467db6e79656d63adf77f7e1b5dc7d376b

  • SHA512

    225b0ba45ad5ea53b77f742e8c8ba3432a1f9c3e79ab11a7d0838ae03600f3442c08338b1d2f533add7e303021f4a0ed685d6f110ce9fac36bba60f9a29ffa74

  • SSDEEP

    6144:3Q3Im3YkuahFo/uM1GIKAs8LfffihaXV+l/wggD5a:vkXk1LKAs8TfihaXMGggY

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 firewall policy service 2 TTPs 3 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
  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 1 IoCs
  • Windows security modification 2 TTPs 7 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\fontdrvhost.exe
    "fontdrvhost.exe"
    1⤵
      PID:780
    • C:\Windows\system32\dwm.exe
      "dwm.exe"
      1⤵
        PID:332
      • C:\Windows\system32\fontdrvhost.exe
        "fontdrvhost.exe"
        1⤵
          PID:788
        • C:\Windows\system32\sihost.exe
          sihost.exe
          1⤵
            PID:2372
          • C:\Windows\system32\svchost.exe
            C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
            1⤵
              PID:2380
            • 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\42671db146deab97ebbe7a554502d0467db6e79656d63adf77f7e1b5dc7d376b.exe
                    "C:\Users\Admin\AppData\Local\Temp\42671db146deab97ebbe7a554502d0467db6e79656d63adf77f7e1b5dc7d376b.exe"
                    2⤵
                    • Modifies firewall policy service
                    • UAC bypass
                    • Windows security bypass
                    • Loads dropped DLL
                    • Windows security modification
                    • Checks whether UAC is enabled
                    • Enumerates connected drives
                    • Drops file in Windows directory
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    • System policy modification
                    PID:5016
                    • C:\Users\Admin\AppData\Local\Temp\DeleteFile.exe
                      C:\Users\Admin\AppData\Local\Temp\DeleteFile.exe
                      3⤵
                      • Executes dropped EXE
                      • Checks computer location settings
                      • Suspicious use of SetWindowsHookEx
                      • Suspicious use of WriteProcessMemory
                      PID:3636
                      • C:\Windows\SysWOW64\cmd.exe
                        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DelFile.bat" "
                        4⤵
                          PID:2104
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
                    1⤵
                      PID:3108
                    • C:\Windows\System32\RuntimeBroker.exe
                      C:\Windows\System32\RuntimeBroker.exe -Embedding
                      1⤵
                        PID:4344
                      • C:\Windows\System32\RuntimeBroker.exe
                        C:\Windows\System32\RuntimeBroker.exe -Embedding
                        1⤵
                          PID:4700
                        • 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:3512
                              • 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

                                  Network

                                  MITRE ATT&CK Enterprise v6

                                  Replay Monitor

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                                  Downloads

                                  • C:\Users\Admin\AppData\Local\Temp\DelFile.bat

                                    Filesize

                                    88B

                                    MD5

                                    47b65094daedc3fed42669a8cd583556

                                    SHA1

                                    18568606d880bb090c5c54ed68b031f99fe02954

                                    SHA256

                                    cf4839b27b260bbfaf89c1ce7ef6cc426cda4b5120d6adcf447a77b352913db8

                                    SHA512

                                    ff2d7d2b2bebfde4eb331b4f94cbd39a9a238f2b8cd5d6f463c84ceedc5e372458ef402b960e2c6177de26a7e08193ea3a845c3eab3b002bcfe19bb5e5927f92

                                  • C:\Users\Admin\AppData\Local\Temp\DeleteFile.exe

                                    Filesize

                                    236KB

                                    MD5

                                    f4cee4ec36ad2cde717edd940528fba2

                                    SHA1

                                    fc71db69abdc7679fb4e6b3ca31604a68a328ccf

                                    SHA256

                                    2aafe1803c23ce34522e6d34835eac40e7715b11ccada95a256066a9a38426dd

                                    SHA512

                                    a74d5126519aba5ec2855a84bdd3e137ad1dcd6c94eafe7e6c7835979a7a2580f7a366bb3e8c7facd1f42003bfdb5525dde457d19fa698dc5073e91a30c9f321

                                  • C:\Users\Admin\AppData\Local\Temp\DeleteFile.exe

                                    Filesize

                                    236KB

                                    MD5

                                    f4cee4ec36ad2cde717edd940528fba2

                                    SHA1

                                    fc71db69abdc7679fb4e6b3ca31604a68a328ccf

                                    SHA256

                                    2aafe1803c23ce34522e6d34835eac40e7715b11ccada95a256066a9a38426dd

                                    SHA512

                                    a74d5126519aba5ec2855a84bdd3e137ad1dcd6c94eafe7e6c7835979a7a2580f7a366bb3e8c7facd1f42003bfdb5525dde457d19fa698dc5073e91a30c9f321

                                  • C:\Users\Admin\AppData\Local\Temp\nswFE0D.tmp\System.dll

                                    Filesize

                                    11KB

                                    MD5

                                    c17103ae9072a06da581dec998343fc1

                                    SHA1

                                    b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

                                    SHA256

                                    dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

                                    SHA512

                                    d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

                                  • memory/5016-132-0x0000000000400000-0x0000000000441000-memory.dmp

                                    Filesize

                                    260KB

                                  • memory/5016-133-0x0000000002350000-0x000000000340A000-memory.dmp

                                    Filesize

                                    16.7MB

                                  • memory/5016-134-0x0000000002350000-0x000000000340A000-memory.dmp

                                    Filesize

                                    16.7MB

                                  • memory/5016-136-0x0000000002350000-0x000000000340A000-memory.dmp

                                    Filesize

                                    16.7MB

                                  • memory/5016-140-0x0000000000400000-0x0000000000441000-memory.dmp

                                    Filesize

                                    260KB

                                  • memory/5016-141-0x0000000002350000-0x000000000340A000-memory.dmp

                                    Filesize

                                    16.7MB