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Analysis

  • max time kernel
    90s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/11/2022, 05:37

General

  • Target

    a1f77427d146aff6356e739e0fe49ee17d62b298835663cb4e0fc86e1bfe2a48.exe

  • Size

    598KB

  • MD5

    6b4647747140420e881c903a10c3e518

  • SHA1

    6af94b9046b1e63b80306af0182b211c6135d2b9

  • SHA256

    a1f77427d146aff6356e739e0fe49ee17d62b298835663cb4e0fc86e1bfe2a48

  • SHA512

    20bac3a454bd8d8a73bd864628fb1246ce9d2f2a292af3f0f703df2e4969ccb0fd7495352d8a046388e36e99d8c776eb127da3f2250508785d899c0a21207943

  • SSDEEP

    12288:xIny5DYT2ourbpe2BCEqKqVUYP9a61GWK5PAM3yzvAz/a:NUT25AEBqOYPk61Gl5Pt3yzS/a

Score
8/10

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 14 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in System32 directory 5 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 1 IoCs
  • Runs net.exe
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a1f77427d146aff6356e739e0fe49ee17d62b298835663cb4e0fc86e1bfe2a48.exe
    "C:\Users\Admin\AppData\Local\Temp\a1f77427d146aff6356e739e0fe49ee17d62b298835663cb4e0fc86e1bfe2a48.exe"
    1⤵
    • Drops file in Drivers directory
    • Loads dropped DLL
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:516
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4516
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:4260
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4212
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:3024
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1308
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:4552
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:2076
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:4216
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1888
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:628
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:5088
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Modifies data under HKEY_USERS
            • Suspicious use of AdjustPrivilegeToken
            PID:956
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1800

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\nscB55C.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • C:\Users\Admin\AppData\Local\Temp\nscB55C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nscB55C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nscB55C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nscB55C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nscB55C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nscB55C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nscB55C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nscB55C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            f12c6b6b4ced2008596063a80a57ef90

            SHA1

            99105dda43b44f185827f1db6d138e239d44a824

            SHA256

            626815d360f51993ac9d7c4199a956ec79bdd6e46beb67ccf8ab4911a5612370

            SHA512

            36f7579d4a1039c954eb58d1a8e8422eba20ca5e3a32e79b67d4021a784c91183f709fbf5258ba7bc2501b5c7f665bb22ccc2c6e8147cd3d1c443a99daee3cbf

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            f12c6b6b4ced2008596063a80a57ef90

            SHA1

            99105dda43b44f185827f1db6d138e239d44a824

            SHA256

            626815d360f51993ac9d7c4199a956ec79bdd6e46beb67ccf8ab4911a5612370

            SHA512

            36f7579d4a1039c954eb58d1a8e8422eba20ca5e3a32e79b67d4021a784c91183f709fbf5258ba7bc2501b5c7f665bb22ccc2c6e8147cd3d1c443a99daee3cbf

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            f12c6b6b4ced2008596063a80a57ef90

            SHA1

            99105dda43b44f185827f1db6d138e239d44a824

            SHA256

            626815d360f51993ac9d7c4199a956ec79bdd6e46beb67ccf8ab4911a5612370

            SHA512

            36f7579d4a1039c954eb58d1a8e8422eba20ca5e3a32e79b67d4021a784c91183f709fbf5258ba7bc2501b5c7f665bb22ccc2c6e8147cd3d1c443a99daee3cbf

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            f12c6b6b4ced2008596063a80a57ef90

            SHA1

            99105dda43b44f185827f1db6d138e239d44a824

            SHA256

            626815d360f51993ac9d7c4199a956ec79bdd6e46beb67ccf8ab4911a5612370

            SHA512

            36f7579d4a1039c954eb58d1a8e8422eba20ca5e3a32e79b67d4021a784c91183f709fbf5258ba7bc2501b5c7f665bb22ccc2c6e8147cd3d1c443a99daee3cbf

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            33675920c6fd6e8d984d44b0b5c54c74

            SHA1

            8c3226c3e02267453e7cdcc6f1c2653c20b8163c

            SHA256

            6cca214e3a629d0a70ff54a1e91a1985000aa935b55e85f6fab8f26ae66e6bce

            SHA512

            be852ec9a242e1d8b1dce93477311c7812d67eebb959cd20a818c334e892dbc1c3d09ee1cd96a6e3f7947fc7c6909feb2702920ff0b0818227e288540c06f679

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            33675920c6fd6e8d984d44b0b5c54c74

            SHA1

            8c3226c3e02267453e7cdcc6f1c2653c20b8163c

            SHA256

            6cca214e3a629d0a70ff54a1e91a1985000aa935b55e85f6fab8f26ae66e6bce

            SHA512

            be852ec9a242e1d8b1dce93477311c7812d67eebb959cd20a818c334e892dbc1c3d09ee1cd96a6e3f7947fc7c6909feb2702920ff0b0818227e288540c06f679

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            33675920c6fd6e8d984d44b0b5c54c74

            SHA1

            8c3226c3e02267453e7cdcc6f1c2653c20b8163c

            SHA256

            6cca214e3a629d0a70ff54a1e91a1985000aa935b55e85f6fab8f26ae66e6bce

            SHA512

            be852ec9a242e1d8b1dce93477311c7812d67eebb959cd20a818c334e892dbc1c3d09ee1cd96a6e3f7947fc7c6909feb2702920ff0b0818227e288540c06f679

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            6e0dff5857344cdfe78ea1cc6af7ad51

            SHA1

            ae536617a341ec50d51966277825a6e4a1c50030

            SHA256

            33f684088873e2d068f86a7b6c61cf6397901ae4d674a79026d91dadefb0cb9d

            SHA512

            a6165902ac7393bdcc04113e1d4c8cea74b07da0dc4aa29c7f178390a89e6aedb6ae2071117f515edb7f4bc74a3d3e04bb3e68aea603550d5e3190b9eae5aa54

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            6e0dff5857344cdfe78ea1cc6af7ad51

            SHA1

            ae536617a341ec50d51966277825a6e4a1c50030

            SHA256

            33f684088873e2d068f86a7b6c61cf6397901ae4d674a79026d91dadefb0cb9d

            SHA512

            a6165902ac7393bdcc04113e1d4c8cea74b07da0dc4aa29c7f178390a89e6aedb6ae2071117f515edb7f4bc74a3d3e04bb3e68aea603550d5e3190b9eae5aa54

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            0ffe2b58a7c6a164b90056b11bf2e57b

            SHA1

            f0b4332e2cbd35aac7ed371b69e70c1b15c83eb0

            SHA256

            123f79905900ce860aa1ce2b13be79e0270c5b66ec6a15c554271802e47b9d34

            SHA512

            4096c475d328a7a0d7bde554a0f0b494cd0c7ce0b685f206db4a77891eef715aade29f2b72208439cb072e4b61f8497cf21e3fddf4b934fc7bc9b511cef6c0ec

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            0ffe2b58a7c6a164b90056b11bf2e57b

            SHA1

            f0b4332e2cbd35aac7ed371b69e70c1b15c83eb0

            SHA256

            123f79905900ce860aa1ce2b13be79e0270c5b66ec6a15c554271802e47b9d34

            SHA512

            4096c475d328a7a0d7bde554a0f0b494cd0c7ce0b685f206db4a77891eef715aade29f2b72208439cb072e4b61f8497cf21e3fddf4b934fc7bc9b511cef6c0ec

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            0ffe2b58a7c6a164b90056b11bf2e57b

            SHA1

            f0b4332e2cbd35aac7ed371b69e70c1b15c83eb0

            SHA256

            123f79905900ce860aa1ce2b13be79e0270c5b66ec6a15c554271802e47b9d34

            SHA512

            4096c475d328a7a0d7bde554a0f0b494cd0c7ce0b685f206db4a77891eef715aade29f2b72208439cb072e4b61f8497cf21e3fddf4b934fc7bc9b511cef6c0ec

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            f72b1509edc9cc2ddece9f674106d4e5

            SHA1

            8ac7ffcfbb104e1cd7a1fd7198a95415d638a405

            SHA256

            0005a4c7095c62ba7d5177c9c8828ccd411645ae7c3c0cb3f5423d3b3545fc6c

            SHA512

            9da15654f78d0c67d1da14d8412942c74d19394ec365fe5c4778ad3b7391b67dae7a0d674f0f4ad820b65262bdc051873d990881da6c4d1d635c5d1ff723f623

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            f72b1509edc9cc2ddece9f674106d4e5

            SHA1

            8ac7ffcfbb104e1cd7a1fd7198a95415d638a405

            SHA256

            0005a4c7095c62ba7d5177c9c8828ccd411645ae7c3c0cb3f5423d3b3545fc6c

            SHA512

            9da15654f78d0c67d1da14d8412942c74d19394ec365fe5c4778ad3b7391b67dae7a0d674f0f4ad820b65262bdc051873d990881da6c4d1d635c5d1ff723f623

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            f72b1509edc9cc2ddece9f674106d4e5

            SHA1

            8ac7ffcfbb104e1cd7a1fd7198a95415d638a405

            SHA256

            0005a4c7095c62ba7d5177c9c8828ccd411645ae7c3c0cb3f5423d3b3545fc6c

            SHA512

            9da15654f78d0c67d1da14d8412942c74d19394ec365fe5c4778ad3b7391b67dae7a0d674f0f4ad820b65262bdc051873d990881da6c4d1d635c5d1ff723f623

          • memory/516-137-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/516-168-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB