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Analysis

  • max time kernel
    45s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    24/11/2022, 06:10

General

  • Target

    a5efdb70cf256a0e31bf5295fec0b7f6a6efd690c58196e7db9275529d4e5988.exe

  • Size

    676KB

  • MD5

    e742b815b15c725791f5a13ab38482e2

  • SHA1

    c88db982a544c0305deccc90c7a9dd620ffd71ca

  • SHA256

    a5efdb70cf256a0e31bf5295fec0b7f6a6efd690c58196e7db9275529d4e5988

  • SHA512

    19d90267f5eff7828347c460c745887347ac45bb40861434bc542ed6c01e3a6fe47b83d0927f99720166d3b47245d65c9014b33a43675a56820d9be50e7d7b85

  • SSDEEP

    12288:8dgmy6lZ8E9soPvowBbfunHwhTRbQpdWnFiHfgiujN0n2r3s6eiCv6fC:8dgX6tTLFfYGhadkiHt2rveiCC

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\a5efdb70cf256a0e31bf5295fec0b7f6a6efd690c58196e7db9275529d4e5988.exe
    "C:\Users\Admin\AppData\Local\Temp\a5efdb70cf256a0e31bf5295fec0b7f6a6efd690c58196e7db9275529d4e5988.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:1368
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:976
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1644
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1248
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1872
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1192
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:544
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1028
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:2028
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1928
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1256
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1392
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:2008
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1432

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            545ac9a76fdfbed2f2064cf7c4a06c71

            SHA1

            e4c0d9acbba54429f610257a13ce857ad1ce4443

            SHA256

            321014cf8bf90beb39937e6e7a16e668b61fad85c1d4d3c7da853fbc42355a02

            SHA512

            e4eaf5669f39de9fb2a93fd4e2dbe01818e5ee75c44b1d871ba99705387e0c68b818406684f0d3f8a5ba3d018b41e1d37d118f4b4bc561115a4d00ef5746df70

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            4a8585a630b7ecdb3e81762849a52725

            SHA1

            8cbca6be11c3cd77b77d9ff86d7168a37bea25a5

            SHA256

            d9c145941c38aad556de62fa9828e554eb1454b8ca4a25b638b7bcd6a96c1b4e

            SHA512

            cc84d992ebbb5e168320eb6a7f1c42457791aeea53e27587be1879acca638fe52d5c824e7bc4c5ecd55376204c5e7dcc98e43dc6bc174db0abfc896875ba615c

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            e8efef4ff3e67cb189554fd575dc8033

            SHA1

            2262bda8636ce5d40e371c1a8063c51cc11546bd

            SHA256

            b2f190b46e76cd7caae8b9fd053c58e6ade70919f8ce75cc80bc51dec0586778

            SHA512

            e09dade757f02e9ab46dea158a9e55f7b7f76325b4fc636f5fe3643af8b6e0a66db1a0f2325ba3954ecde1c02effb7ca22bb29bbd1bd4d094ca02126ff828d66

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            23a9417e9a67c04693cf3e7c54e494a7

            SHA1

            3dd3c94ef0cbe8ba0d72d649eeb640383af9f6d1

            SHA256

            02feaf1c940aac99a9d38fc51fdc771b76a9dd0c74aec17abb86923f917491ad

            SHA512

            92f974022b386cd9faa70a6578b7e45229424c267f61e3c309ff4470e728fab7b4bdfc09f6a5d4db24c79577c392025b4b3badd1aea2c2e324850aa2ccc620b2

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            23a9417e9a67c04693cf3e7c54e494a7

            SHA1

            3dd3c94ef0cbe8ba0d72d649eeb640383af9f6d1

            SHA256

            02feaf1c940aac99a9d38fc51fdc771b76a9dd0c74aec17abb86923f917491ad

            SHA512

            92f974022b386cd9faa70a6578b7e45229424c267f61e3c309ff4470e728fab7b4bdfc09f6a5d4db24c79577c392025b4b3badd1aea2c2e324850aa2ccc620b2

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            9b71f1f0cc72561670c29e579915e27d

            SHA1

            f3bb90b4fda83eb6df748ec3c5ca069e95ca4f3e

            SHA256

            9f6ae9622c02874889b10f0fe6d90db932b577d700c6f3fe870ad8115c7b5ac6

            SHA512

            1f9ff0bf1bd0c64016bd7ae34eeb5eb3ffa5c2e37d8024db5b2f68d6572e49c31291bebbd1985198f93eb989e4c12cfa5fa5672613cf2aa476438d61fd4b4e26

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            9b71f1f0cc72561670c29e579915e27d

            SHA1

            f3bb90b4fda83eb6df748ec3c5ca069e95ca4f3e

            SHA256

            9f6ae9622c02874889b10f0fe6d90db932b577d700c6f3fe870ad8115c7b5ac6

            SHA512

            1f9ff0bf1bd0c64016bd7ae34eeb5eb3ffa5c2e37d8024db5b2f68d6572e49c31291bebbd1985198f93eb989e4c12cfa5fa5672613cf2aa476438d61fd4b4e26

          • \Users\Admin\AppData\Local\Temp\nsy282C.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsy282C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy282C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy282C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy282C.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            545ac9a76fdfbed2f2064cf7c4a06c71

            SHA1

            e4c0d9acbba54429f610257a13ce857ad1ce4443

            SHA256

            321014cf8bf90beb39937e6e7a16e668b61fad85c1d4d3c7da853fbc42355a02

            SHA512

            e4eaf5669f39de9fb2a93fd4e2dbe01818e5ee75c44b1d871ba99705387e0c68b818406684f0d3f8a5ba3d018b41e1d37d118f4b4bc561115a4d00ef5746df70

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            545ac9a76fdfbed2f2064cf7c4a06c71

            SHA1

            e4c0d9acbba54429f610257a13ce857ad1ce4443

            SHA256

            321014cf8bf90beb39937e6e7a16e668b61fad85c1d4d3c7da853fbc42355a02

            SHA512

            e4eaf5669f39de9fb2a93fd4e2dbe01818e5ee75c44b1d871ba99705387e0c68b818406684f0d3f8a5ba3d018b41e1d37d118f4b4bc561115a4d00ef5746df70

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            545ac9a76fdfbed2f2064cf7c4a06c71

            SHA1

            e4c0d9acbba54429f610257a13ce857ad1ce4443

            SHA256

            321014cf8bf90beb39937e6e7a16e668b61fad85c1d4d3c7da853fbc42355a02

            SHA512

            e4eaf5669f39de9fb2a93fd4e2dbe01818e5ee75c44b1d871ba99705387e0c68b818406684f0d3f8a5ba3d018b41e1d37d118f4b4bc561115a4d00ef5746df70

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            4a8585a630b7ecdb3e81762849a52725

            SHA1

            8cbca6be11c3cd77b77d9ff86d7168a37bea25a5

            SHA256

            d9c145941c38aad556de62fa9828e554eb1454b8ca4a25b638b7bcd6a96c1b4e

            SHA512

            cc84d992ebbb5e168320eb6a7f1c42457791aeea53e27587be1879acca638fe52d5c824e7bc4c5ecd55376204c5e7dcc98e43dc6bc174db0abfc896875ba615c

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            4a8585a630b7ecdb3e81762849a52725

            SHA1

            8cbca6be11c3cd77b77d9ff86d7168a37bea25a5

            SHA256

            d9c145941c38aad556de62fa9828e554eb1454b8ca4a25b638b7bcd6a96c1b4e

            SHA512

            cc84d992ebbb5e168320eb6a7f1c42457791aeea53e27587be1879acca638fe52d5c824e7bc4c5ecd55376204c5e7dcc98e43dc6bc174db0abfc896875ba615c

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            e8efef4ff3e67cb189554fd575dc8033

            SHA1

            2262bda8636ce5d40e371c1a8063c51cc11546bd

            SHA256

            b2f190b46e76cd7caae8b9fd053c58e6ade70919f8ce75cc80bc51dec0586778

            SHA512

            e09dade757f02e9ab46dea158a9e55f7b7f76325b4fc636f5fe3643af8b6e0a66db1a0f2325ba3954ecde1c02effb7ca22bb29bbd1bd4d094ca02126ff828d66

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            23a9417e9a67c04693cf3e7c54e494a7

            SHA1

            3dd3c94ef0cbe8ba0d72d649eeb640383af9f6d1

            SHA256

            02feaf1c940aac99a9d38fc51fdc771b76a9dd0c74aec17abb86923f917491ad

            SHA512

            92f974022b386cd9faa70a6578b7e45229424c267f61e3c309ff4470e728fab7b4bdfc09f6a5d4db24c79577c392025b4b3badd1aea2c2e324850aa2ccc620b2

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            9b71f1f0cc72561670c29e579915e27d

            SHA1

            f3bb90b4fda83eb6df748ec3c5ca069e95ca4f3e

            SHA256

            9f6ae9622c02874889b10f0fe6d90db932b577d700c6f3fe870ad8115c7b5ac6

            SHA512

            1f9ff0bf1bd0c64016bd7ae34eeb5eb3ffa5c2e37d8024db5b2f68d6572e49c31291bebbd1985198f93eb989e4c12cfa5fa5672613cf2aa476438d61fd4b4e26

          • memory/1368-90-0x0000000000350000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1368-54-0x0000000074E41000-0x0000000074E43000-memory.dmp

            Filesize

            8KB

          • memory/1368-59-0x0000000000350000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB