Analysis

  • max time kernel
    40s
  • max time network
    30s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:16

General

  • Target

    a8f839298aeae3aadff3718997be73e01e56b79cce30246c64b9c0acd2b11d1a.exe

  • Size

    601KB

  • MD5

    88296cc56b251ccc709061f2c497996a

  • SHA1

    04c86c0f2b799c884289b7c714f3da00768a37da

  • SHA256

    a8f839298aeae3aadff3718997be73e01e56b79cce30246c64b9c0acd2b11d1a

  • SHA512

    51cd4d470cb4e6b2c4bb844459d79af3aa3ce69dcc240e9a5c0b7a749b47bedec669515a2057e9bc6f690038e354ed6c2f3320c0b516a2bbd24945afde9fe535

  • SSDEEP

    12288:FIny5DYTPIhOI0C5g9nwcKpaGTeBdrNN9lJ9zVUyrqmv1ENXDkE9:xUTP6Vg1wcKpNKt9lJUf8e

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\a8f839298aeae3aadff3718997be73e01e56b79cce30246c64b9c0acd2b11d1a.exe
    "C:\Users\Admin\AppData\Local\Temp\a8f839298aeae3aadff3718997be73e01e56b79cce30246c64b9c0acd2b11d1a.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:832
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1384
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1532
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:468
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1308
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1680
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:688
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:572
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1608
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:640
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1600
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1692
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1932
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1720

          Network

          MITRE ATT&CK Matrix ATT&CK v6

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          1
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            20df9dd84abb4cf2276978a21b714983

            SHA1

            83c8716026278376a831415e58681903e9ffc19a

            SHA256

            6a9166a72b9648403174722bce644feed5ff7d3de766fd994af6ba9837e1d64e

            SHA512

            956c39956eb84cd5caf287aa4b666f17337d54a234bdd4bba67da34cd2a19a22a6195707a02caf7e8ba9f6662198c589df70a5cb70e19e85389a635b7db16ddb

          • C:\Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            bcdfbc8732e76809fbf7dc00d8ef431a

            SHA1

            6c60a33224aaed8d96ff483bf806e6635505d2ce

            SHA256

            1ea3d1229cb5e3c0c04c97749fbf0e908d108fd7770dd8c99378193a75edbe90

            SHA512

            1b4e9fd0a76ec296d7553c6b2dc81413583b1c79712296978c936fa43af35b2de624ae2adfc9027aeb2cb9f1ef6870797f2671ad4458471d82e58eba063e83bb

          • C:\Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            f9e9fe8a51a1ee841056d852ad11983a

            SHA1

            8708dc3dc5ad17f4240231feb526d505c8f87fc3

            SHA256

            756a41e6a2fffb870f947b83801f327d07912938924b9fae9752aa16c67ff584

            SHA512

            63fb4bb733ad28f42a1b41217f0a249f7b16425bb2ce2fde8f27208e71d4b471f30f65d1757efcf6d4449f4d2de8ae5326db840411627a52a4b29884236d2660

          • C:\Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            0f0e3b9b783d4b1bcdc981f090b23991

            SHA1

            20ffe50107cdcdf1042f0f24b32bb3f075043338

            SHA256

            59935c514fe91ee66c01fbf8acf6b5437d29b0ce659fca4d03dfa8e53fe79b51

            SHA512

            cb093463decd69de79547c0e5081c91d3927e00cb451bf1a5cce09d5f96fa3933228f90ecac20a3da15ab9018abef69904baf195527f8ecaf67d203d98c1a55a

          • C:\Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            0f0e3b9b783d4b1bcdc981f090b23991

            SHA1

            20ffe50107cdcdf1042f0f24b32bb3f075043338

            SHA256

            59935c514fe91ee66c01fbf8acf6b5437d29b0ce659fca4d03dfa8e53fe79b51

            SHA512

            cb093463decd69de79547c0e5081c91d3927e00cb451bf1a5cce09d5f96fa3933228f90ecac20a3da15ab9018abef69904baf195527f8ecaf67d203d98c1a55a

          • C:\Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            37a5b427a135d2c8e4620a007c325492

            SHA1

            762dd54adbe7f94743fff2502fa31cd032929033

            SHA256

            d68b4caa0c85584e20fd2a7c28f6ef5e459a420ad3596df94f5090ca8cb40d5c

            SHA512

            15cec56f88e6c08a6f5c48ccb324429d75612fcf613d99f2d477ad2235b504582c39b5694f152fe9a99c606ff919be8e3acbb7f2aacf0c2a9c48b3e0d7519883

          • C:\Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            37a5b427a135d2c8e4620a007c325492

            SHA1

            762dd54adbe7f94743fff2502fa31cd032929033

            SHA256

            d68b4caa0c85584e20fd2a7c28f6ef5e459a420ad3596df94f5090ca8cb40d5c

            SHA512

            15cec56f88e6c08a6f5c48ccb324429d75612fcf613d99f2d477ad2235b504582c39b5694f152fe9a99c606ff919be8e3acbb7f2aacf0c2a9c48b3e0d7519883

          • \Users\Admin\AppData\Local\Temp\nst1835.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nst1835.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst1835.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst1835.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst1835.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            20df9dd84abb4cf2276978a21b714983

            SHA1

            83c8716026278376a831415e58681903e9ffc19a

            SHA256

            6a9166a72b9648403174722bce644feed5ff7d3de766fd994af6ba9837e1d64e

            SHA512

            956c39956eb84cd5caf287aa4b666f17337d54a234bdd4bba67da34cd2a19a22a6195707a02caf7e8ba9f6662198c589df70a5cb70e19e85389a635b7db16ddb

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            20df9dd84abb4cf2276978a21b714983

            SHA1

            83c8716026278376a831415e58681903e9ffc19a

            SHA256

            6a9166a72b9648403174722bce644feed5ff7d3de766fd994af6ba9837e1d64e

            SHA512

            956c39956eb84cd5caf287aa4b666f17337d54a234bdd4bba67da34cd2a19a22a6195707a02caf7e8ba9f6662198c589df70a5cb70e19e85389a635b7db16ddb

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            20df9dd84abb4cf2276978a21b714983

            SHA1

            83c8716026278376a831415e58681903e9ffc19a

            SHA256

            6a9166a72b9648403174722bce644feed5ff7d3de766fd994af6ba9837e1d64e

            SHA512

            956c39956eb84cd5caf287aa4b666f17337d54a234bdd4bba67da34cd2a19a22a6195707a02caf7e8ba9f6662198c589df70a5cb70e19e85389a635b7db16ddb

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            bcdfbc8732e76809fbf7dc00d8ef431a

            SHA1

            6c60a33224aaed8d96ff483bf806e6635505d2ce

            SHA256

            1ea3d1229cb5e3c0c04c97749fbf0e908d108fd7770dd8c99378193a75edbe90

            SHA512

            1b4e9fd0a76ec296d7553c6b2dc81413583b1c79712296978c936fa43af35b2de624ae2adfc9027aeb2cb9f1ef6870797f2671ad4458471d82e58eba063e83bb

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            bcdfbc8732e76809fbf7dc00d8ef431a

            SHA1

            6c60a33224aaed8d96ff483bf806e6635505d2ce

            SHA256

            1ea3d1229cb5e3c0c04c97749fbf0e908d108fd7770dd8c99378193a75edbe90

            SHA512

            1b4e9fd0a76ec296d7553c6b2dc81413583b1c79712296978c936fa43af35b2de624ae2adfc9027aeb2cb9f1ef6870797f2671ad4458471d82e58eba063e83bb

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            f9e9fe8a51a1ee841056d852ad11983a

            SHA1

            8708dc3dc5ad17f4240231feb526d505c8f87fc3

            SHA256

            756a41e6a2fffb870f947b83801f327d07912938924b9fae9752aa16c67ff584

            SHA512

            63fb4bb733ad28f42a1b41217f0a249f7b16425bb2ce2fde8f27208e71d4b471f30f65d1757efcf6d4449f4d2de8ae5326db840411627a52a4b29884236d2660

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            0f0e3b9b783d4b1bcdc981f090b23991

            SHA1

            20ffe50107cdcdf1042f0f24b32bb3f075043338

            SHA256

            59935c514fe91ee66c01fbf8acf6b5437d29b0ce659fca4d03dfa8e53fe79b51

            SHA512

            cb093463decd69de79547c0e5081c91d3927e00cb451bf1a5cce09d5f96fa3933228f90ecac20a3da15ab9018abef69904baf195527f8ecaf67d203d98c1a55a

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            37a5b427a135d2c8e4620a007c325492

            SHA1

            762dd54adbe7f94743fff2502fa31cd032929033

            SHA256

            d68b4caa0c85584e20fd2a7c28f6ef5e459a420ad3596df94f5090ca8cb40d5c

            SHA512

            15cec56f88e6c08a6f5c48ccb324429d75612fcf613d99f2d477ad2235b504582c39b5694f152fe9a99c606ff919be8e3acbb7f2aacf0c2a9c48b3e0d7519883

          • memory/468-61-0x0000000000000000-mapping.dmp
          • memory/572-77-0x0000000000000000-mapping.dmp
          • memory/640-82-0x0000000000000000-mapping.dmp
          • memory/688-71-0x0000000000000000-mapping.dmp
          • memory/832-54-0x0000000075CF1000-0x0000000075CF3000-memory.dmp
            Filesize

            8KB

          • memory/832-69-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/832-59-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/832-91-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1308-62-0x0000000000000000-mapping.dmp
          • memory/1384-57-0x0000000000000000-mapping.dmp
          • memory/1532-58-0x0000000000000000-mapping.dmp
          • memory/1600-87-0x0000000000000000-mapping.dmp
          • memory/1608-81-0x0000000000000000-mapping.dmp
          • memory/1680-64-0x0000000000000000-mapping.dmp
          • memory/1692-88-0x0000000000000000-mapping.dmp