Analysis

  • max time kernel
    60s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:17

General

  • Target

    a3399f2edb5eb44e527a123daf8727feeaf5a34294e764d1516de6deba19e6b8.exe

  • Size

    601KB

  • MD5

    088e1f55183e4774440312f46f1e7251

  • SHA1

    5f1483c9ec076ec794dd29cae4532003535dd9bc

  • SHA256

    a3399f2edb5eb44e527a123daf8727feeaf5a34294e764d1516de6deba19e6b8

  • SHA512

    b4fe76c9c2513eed1a3582605f353753cb5f5698f0d2a569889e5cc7717cac2b490a0b8de00a3f48bf70d50a6fd28923584cb8301472b3ea9ef47de56f55b817

  • SSDEEP

    12288:IIny5DYTSIDe+zPyTPLK7UV2CPUkKR+iNEkZNTGZmspkTJ:GUTSweY2LK7UzKRfEcqpc

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\a3399f2edb5eb44e527a123daf8727feeaf5a34294e764d1516de6deba19e6b8.exe
    "C:\Users\Admin\AppData\Local\Temp\a3399f2edb5eb44e527a123daf8727feeaf5a34294e764d1516de6deba19e6b8.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:1344
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:568
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:660
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:328
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1164
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:812
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1736
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1624
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1168
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1408
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:816
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:596
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1892
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:616

          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

            c00171845e8972e28f726a33a5ef10a4

            SHA1

            1be5b31cc23524217b657a165a10aa3bc38ca60d

            SHA256

            d75f3a4e06e22bfb195ea419ee374dca0620209b8943cae0ee34f456c4df324f

            SHA512

            e627af3c5429930d4e00fd44baece8de4f9d718b62c4bb99e289df5cbe67766d14760f4ccac5110333989415a7f65960fe50fca102eb6d570099e65d0e3a4d85

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

            241KB

            MD5

            02caf37eea0e98c5167ac5be652d10b3

            SHA1

            847a12645c8baa870e632c6ab52fd7625b3088ba

            SHA256

            c8577da8f5683de5bf32d749d476715edf21b56393e9bf3b1e602f942bce04a6

            SHA512

            60aa33659418d6e0ec3c21bc64e495604fe7bd5f49dbca32e3fb8efbd7cf296c87006054c89b23ee52f9e3b4f42a38220491eb197851c9d9dca692ca1434495f

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

            108KB

            MD5

            cdb1dcabf5f31403dde59b1170b2295a

            SHA1

            3c7a8c90c7a627712e351d4010553c6b39125ed2

            SHA256

            f2b97a68b06826de7fba3cfa31d54750d9d6c488aa59ced769e942cacaa8daf9

            SHA512

            9ef14eadfcfb465dcc6982a2780326044487ad7cf09a766c0386f0713934c7cb656596aa8248097b65772db1b2ed27c484431d6d2d19d4952e3b13d10823f18e

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

            176KB

            MD5

            21e876ff4eee067cf11109532ebcc483

            SHA1

            947d5defd0528725c2b91d29a9457deb3965a825

            SHA256

            8f591017338d2278a7b2ebdc104fa260b8ef8598d67b605a2a9e6408467fbe60

            SHA512

            f58a30cf6d3b588868349ceea26877c4c3dedba726c5631abe91fa0b79f3dfe79a5a889f1a909d38b2faaee17d34ec841dd1b79cdfd69d2af8ec2c03076a5a01

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

            176KB

            MD5

            21e876ff4eee067cf11109532ebcc483

            SHA1

            947d5defd0528725c2b91d29a9457deb3965a825

            SHA256

            8f591017338d2278a7b2ebdc104fa260b8ef8598d67b605a2a9e6408467fbe60

            SHA512

            f58a30cf6d3b588868349ceea26877c4c3dedba726c5631abe91fa0b79f3dfe79a5a889f1a909d38b2faaee17d34ec841dd1b79cdfd69d2af8ec2c03076a5a01

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

            158KB

            MD5

            f5296d9574833fc9871d069fe7098bb4

            SHA1

            9adba1469680319902b9bba0d949620afb5de511

            SHA256

            c26dd15f9426ab9faf8ad82b0f9e6468900498dc292895ce8b6a2c483df954d0

            SHA512

            36d79472a0bbe9f6fc364d51f2dc4c8f4835f137d9662b704e79ef4b66d1092921af4d96caba9ebe3834e0b0a11a62704b888ca5d6ea29f7e8e40493f7f54e47

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

            158KB

            MD5

            f5296d9574833fc9871d069fe7098bb4

            SHA1

            9adba1469680319902b9bba0d949620afb5de511

            SHA256

            c26dd15f9426ab9faf8ad82b0f9e6468900498dc292895ce8b6a2c483df954d0

            SHA512

            36d79472a0bbe9f6fc364d51f2dc4c8f4835f137d9662b704e79ef4b66d1092921af4d96caba9ebe3834e0b0a11a62704b888ca5d6ea29f7e8e40493f7f54e47

          • \Users\Admin\AppData\Local\Temp\nstEA23.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nstEA23.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nstEA23.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nstEA23.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nstEA23.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            c00171845e8972e28f726a33a5ef10a4

            SHA1

            1be5b31cc23524217b657a165a10aa3bc38ca60d

            SHA256

            d75f3a4e06e22bfb195ea419ee374dca0620209b8943cae0ee34f456c4df324f

            SHA512

            e627af3c5429930d4e00fd44baece8de4f9d718b62c4bb99e289df5cbe67766d14760f4ccac5110333989415a7f65960fe50fca102eb6d570099e65d0e3a4d85

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            c00171845e8972e28f726a33a5ef10a4

            SHA1

            1be5b31cc23524217b657a165a10aa3bc38ca60d

            SHA256

            d75f3a4e06e22bfb195ea419ee374dca0620209b8943cae0ee34f456c4df324f

            SHA512

            e627af3c5429930d4e00fd44baece8de4f9d718b62c4bb99e289df5cbe67766d14760f4ccac5110333989415a7f65960fe50fca102eb6d570099e65d0e3a4d85

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            c00171845e8972e28f726a33a5ef10a4

            SHA1

            1be5b31cc23524217b657a165a10aa3bc38ca60d

            SHA256

            d75f3a4e06e22bfb195ea419ee374dca0620209b8943cae0ee34f456c4df324f

            SHA512

            e627af3c5429930d4e00fd44baece8de4f9d718b62c4bb99e289df5cbe67766d14760f4ccac5110333989415a7f65960fe50fca102eb6d570099e65d0e3a4d85

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            02caf37eea0e98c5167ac5be652d10b3

            SHA1

            847a12645c8baa870e632c6ab52fd7625b3088ba

            SHA256

            c8577da8f5683de5bf32d749d476715edf21b56393e9bf3b1e602f942bce04a6

            SHA512

            60aa33659418d6e0ec3c21bc64e495604fe7bd5f49dbca32e3fb8efbd7cf296c87006054c89b23ee52f9e3b4f42a38220491eb197851c9d9dca692ca1434495f

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            02caf37eea0e98c5167ac5be652d10b3

            SHA1

            847a12645c8baa870e632c6ab52fd7625b3088ba

            SHA256

            c8577da8f5683de5bf32d749d476715edf21b56393e9bf3b1e602f942bce04a6

            SHA512

            60aa33659418d6e0ec3c21bc64e495604fe7bd5f49dbca32e3fb8efbd7cf296c87006054c89b23ee52f9e3b4f42a38220491eb197851c9d9dca692ca1434495f

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            cdb1dcabf5f31403dde59b1170b2295a

            SHA1

            3c7a8c90c7a627712e351d4010553c6b39125ed2

            SHA256

            f2b97a68b06826de7fba3cfa31d54750d9d6c488aa59ced769e942cacaa8daf9

            SHA512

            9ef14eadfcfb465dcc6982a2780326044487ad7cf09a766c0386f0713934c7cb656596aa8248097b65772db1b2ed27c484431d6d2d19d4952e3b13d10823f18e

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            21e876ff4eee067cf11109532ebcc483

            SHA1

            947d5defd0528725c2b91d29a9457deb3965a825

            SHA256

            8f591017338d2278a7b2ebdc104fa260b8ef8598d67b605a2a9e6408467fbe60

            SHA512

            f58a30cf6d3b588868349ceea26877c4c3dedba726c5631abe91fa0b79f3dfe79a5a889f1a909d38b2faaee17d34ec841dd1b79cdfd69d2af8ec2c03076a5a01

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            f5296d9574833fc9871d069fe7098bb4

            SHA1

            9adba1469680319902b9bba0d949620afb5de511

            SHA256

            c26dd15f9426ab9faf8ad82b0f9e6468900498dc292895ce8b6a2c483df954d0

            SHA512

            36d79472a0bbe9f6fc364d51f2dc4c8f4835f137d9662b704e79ef4b66d1092921af4d96caba9ebe3834e0b0a11a62704b888ca5d6ea29f7e8e40493f7f54e47

          • memory/328-61-0x0000000000000000-mapping.dmp
          • memory/568-57-0x0000000000000000-mapping.dmp
          • memory/596-88-0x0000000000000000-mapping.dmp
          • memory/660-58-0x0000000000000000-mapping.dmp
          • memory/812-64-0x0000000000000000-mapping.dmp
          • memory/816-87-0x0000000000000000-mapping.dmp
          • memory/1164-62-0x0000000000000000-mapping.dmp
          • memory/1168-81-0x0000000000000000-mapping.dmp
          • memory/1344-69-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1344-54-0x0000000075811000-0x0000000075813000-memory.dmp
            Filesize

            8KB

          • memory/1344-59-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1344-91-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1408-82-0x0000000000000000-mapping.dmp
          • memory/1624-77-0x0000000000000000-mapping.dmp
          • memory/1736-71-0x0000000000000000-mapping.dmp