Analysis

  • max time kernel
    28s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2022 13:24

General

  • Target

    f3c05b66df5cedab90be62300ff6479e6bcb71825f8b313aad2ccb43613056a5.exe

  • Size

    561KB

  • MD5

    f5a47eb94b22ec8aac30498c99fa8589

  • SHA1

    50f44b40da9fac80f7a2e7b60cd65e747e8408bd

  • SHA256

    f3c05b66df5cedab90be62300ff6479e6bcb71825f8b313aad2ccb43613056a5

  • SHA512

    aac8ef8532532c4896ce79a47671a0c647761c0453b3912a57cdb7cd025aed2c8daaa186325e9349f38868065d8cc850a061398d46f1a3a1bad130cb3cab381d

  • SSDEEP

    12288:kPRYzObf4iD7YnRI0V9ubZyuNv+nJJi8W5QgN4LrO+prz+50Ed9:VzCfBD7ERI0V9yyuknviTN4POWz+50Ev

Score
8/10

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 13 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.

  • Runs net.exe
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 50 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f3c05b66df5cedab90be62300ff6479e6bcb71825f8b313aad2ccb43613056a5.exe
    "C:\Users\Admin\AppData\Local\Temp\f3c05b66df5cedab90be62300ff6479e6bcb71825f8b313aad2ccb43613056a5.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:1388
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1328
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1316
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:860
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1744
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:960
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1012
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:328
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1964
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1828
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1692
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:436
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:524
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:676

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            33381638aac9ace0b6dc339d5247a9a6

            SHA1

            1ae6c37a64cb9bbc80a9b8b4adf3f7291c2974c5

            SHA256

            bc2308bd2481de6564afdb8a68b376ee6662d144b12620fd3333b7aac5f214d2

            SHA512

            443d4e51494375eb511ef2f46fb1d94790b6be6c8d378a9217c561ea35e083d66b21b5c8cb6c78e04903146329b71fe594646fff41ad9a8ad27eece2dd046c60

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            350c39c3d10efcb356682a8c59493c9c

            SHA1

            cb677b9d1cf27afa9402d65e09cc3a6a2dab8a2a

            SHA256

            eb18e8322f5e3a7f1a8e8d4ad0ddeff22613c9344337d55c0fb01fa00bf83fef

            SHA512

            c2e33ad3b8190937cbdae2862d0e0b328ae5aab906d15e20043724988a84b451eb1191ab61c4248be8b8ebd1e5f92555b9a67c9e9718143b022b13b5aa2227f3

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            e507a0c7323c660fc63b6e66f699dd60

            SHA1

            837e32a56e3b159654773fc4b8ed2b3833626a1a

            SHA256

            0bcb6495b1fc2e25a8136b8a9a9f59a9b12a3f6781b04e7583624250630a172a

            SHA512

            a6e7875c45182de68e63c8f3e142d52d5ecb9ee71fd9655131d861efd60b7e42fa8f651712f7cd217e87c3e6e130fefda65deb724d41d770cbebfff0c6b1e3f8

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1a085a1b2f815bd3ac60114a15237b08

            SHA1

            4f7cf5f89f181e494ddb19fc68c9aca6b93fbfa4

            SHA256

            810c65452fe7dfe41bf78cb84e6f1de1d14bd08a6f9d583b7732f37a423aba49

            SHA512

            81a6fe657f5de34df63c821cace77e19856a6ce27566bf546819b8313e2e87984440789908da2e3f182b0b72bb50ad9e884cdd8bd2537422eefa5ddd06af3714

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1a085a1b2f815bd3ac60114a15237b08

            SHA1

            4f7cf5f89f181e494ddb19fc68c9aca6b93fbfa4

            SHA256

            810c65452fe7dfe41bf78cb84e6f1de1d14bd08a6f9d583b7732f37a423aba49

            SHA512

            81a6fe657f5de34df63c821cace77e19856a6ce27566bf546819b8313e2e87984440789908da2e3f182b0b72bb50ad9e884cdd8bd2537422eefa5ddd06af3714

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            c04ebd983773765d48f51379c22f0b06

            SHA1

            dd0c43d3c7538b1ae274fbb4631272a6584d34d8

            SHA256

            1d6f96647bfa6053ef0926fd89df40d98388ba6976b624f4f0677efe6d2d0b48

            SHA512

            5502873ddae1146d98da0adad26ca04929763c33a1352edbbb9187c13867524ec59a002e1288ce72170cc830b3efa7f9cdcc92adc62f8e4af8235f97d727fdd0

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            c04ebd983773765d48f51379c22f0b06

            SHA1

            dd0c43d3c7538b1ae274fbb4631272a6584d34d8

            SHA256

            1d6f96647bfa6053ef0926fd89df40d98388ba6976b624f4f0677efe6d2d0b48

            SHA512

            5502873ddae1146d98da0adad26ca04929763c33a1352edbbb9187c13867524ec59a002e1288ce72170cc830b3efa7f9cdcc92adc62f8e4af8235f97d727fdd0

          • \Users\Admin\AppData\Local\Temp\nsz6E7F.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsz6E7F.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsz6E7F.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsz6E7F.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsz6E7F.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            33381638aac9ace0b6dc339d5247a9a6

            SHA1

            1ae6c37a64cb9bbc80a9b8b4adf3f7291c2974c5

            SHA256

            bc2308bd2481de6564afdb8a68b376ee6662d144b12620fd3333b7aac5f214d2

            SHA512

            443d4e51494375eb511ef2f46fb1d94790b6be6c8d378a9217c561ea35e083d66b21b5c8cb6c78e04903146329b71fe594646fff41ad9a8ad27eece2dd046c60

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            33381638aac9ace0b6dc339d5247a9a6

            SHA1

            1ae6c37a64cb9bbc80a9b8b4adf3f7291c2974c5

            SHA256

            bc2308bd2481de6564afdb8a68b376ee6662d144b12620fd3333b7aac5f214d2

            SHA512

            443d4e51494375eb511ef2f46fb1d94790b6be6c8d378a9217c561ea35e083d66b21b5c8cb6c78e04903146329b71fe594646fff41ad9a8ad27eece2dd046c60

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            33381638aac9ace0b6dc339d5247a9a6

            SHA1

            1ae6c37a64cb9bbc80a9b8b4adf3f7291c2974c5

            SHA256

            bc2308bd2481de6564afdb8a68b376ee6662d144b12620fd3333b7aac5f214d2

            SHA512

            443d4e51494375eb511ef2f46fb1d94790b6be6c8d378a9217c561ea35e083d66b21b5c8cb6c78e04903146329b71fe594646fff41ad9a8ad27eece2dd046c60

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            350c39c3d10efcb356682a8c59493c9c

            SHA1

            cb677b9d1cf27afa9402d65e09cc3a6a2dab8a2a

            SHA256

            eb18e8322f5e3a7f1a8e8d4ad0ddeff22613c9344337d55c0fb01fa00bf83fef

            SHA512

            c2e33ad3b8190937cbdae2862d0e0b328ae5aab906d15e20043724988a84b451eb1191ab61c4248be8b8ebd1e5f92555b9a67c9e9718143b022b13b5aa2227f3

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            350c39c3d10efcb356682a8c59493c9c

            SHA1

            cb677b9d1cf27afa9402d65e09cc3a6a2dab8a2a

            SHA256

            eb18e8322f5e3a7f1a8e8d4ad0ddeff22613c9344337d55c0fb01fa00bf83fef

            SHA512

            c2e33ad3b8190937cbdae2862d0e0b328ae5aab906d15e20043724988a84b451eb1191ab61c4248be8b8ebd1e5f92555b9a67c9e9718143b022b13b5aa2227f3

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            e507a0c7323c660fc63b6e66f699dd60

            SHA1

            837e32a56e3b159654773fc4b8ed2b3833626a1a

            SHA256

            0bcb6495b1fc2e25a8136b8a9a9f59a9b12a3f6781b04e7583624250630a172a

            SHA512

            a6e7875c45182de68e63c8f3e142d52d5ecb9ee71fd9655131d861efd60b7e42fa8f651712f7cd217e87c3e6e130fefda65deb724d41d770cbebfff0c6b1e3f8

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1a085a1b2f815bd3ac60114a15237b08

            SHA1

            4f7cf5f89f181e494ddb19fc68c9aca6b93fbfa4

            SHA256

            810c65452fe7dfe41bf78cb84e6f1de1d14bd08a6f9d583b7732f37a423aba49

            SHA512

            81a6fe657f5de34df63c821cace77e19856a6ce27566bf546819b8313e2e87984440789908da2e3f182b0b72bb50ad9e884cdd8bd2537422eefa5ddd06af3714

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            c04ebd983773765d48f51379c22f0b06

            SHA1

            dd0c43d3c7538b1ae274fbb4631272a6584d34d8

            SHA256

            1d6f96647bfa6053ef0926fd89df40d98388ba6976b624f4f0677efe6d2d0b48

            SHA512

            5502873ddae1146d98da0adad26ca04929763c33a1352edbbb9187c13867524ec59a002e1288ce72170cc830b3efa7f9cdcc92adc62f8e4af8235f97d727fdd0

          • memory/328-76-0x0000000000000000-mapping.dmp

          • memory/436-87-0x0000000000000000-mapping.dmp

          • memory/860-61-0x0000000000000000-mapping.dmp

          • memory/960-64-0x0000000000000000-mapping.dmp

          • memory/1012-70-0x0000000000000000-mapping.dmp

          • memory/1316-59-0x0000000000000000-mapping.dmp

          • memory/1328-58-0x0000000000000000-mapping.dmp

          • memory/1388-90-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1388-54-0x0000000074AD1000-0x0000000074AD3000-memory.dmp

            Filesize

            8KB

          • memory/1388-55-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1692-86-0x0000000000000000-mapping.dmp

          • memory/1744-62-0x0000000000000000-mapping.dmp

          • memory/1828-81-0x0000000000000000-mapping.dmp

          • memory/1964-80-0x0000000000000000-mapping.dmp