Analysis

  • max time kernel
    90s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-11-2022 10:22

General

  • Target

    798419fba011d2de2417ec85fb90bb2d555b6d32663faee6300960d4f580a2ff.exe

  • Size

    603KB

  • MD5

    a8f5a5e90ba2e4326836973b35bcdb7e

  • SHA1

    2e264f0aeb3c81d5938183dd4bfd73a540719e87

  • SHA256

    798419fba011d2de2417ec85fb90bb2d555b6d32663faee6300960d4f580a2ff

  • SHA512

    8fe674d728ce42cefff52ae0ffba0f24bb26bbba229eaa1ecfba2681bd5b09e5189c7530f2c980dcaf2c01b610b09ccac273e16f31b05ecf06ea815eb30831ae

  • SSDEEP

    12288:iIny5DYTQISFKRL0bS/5xZYanvNighuCm:EUTQhFVSBvxNi

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\798419fba011d2de2417ec85fb90bb2d555b6d32663faee6300960d4f580a2ff.exe
    "C:\Users\Admin\AppData\Local\Temp\798419fba011d2de2417ec85fb90bb2d555b6d32663faee6300960d4f580a2ff.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:1080
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3204
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:4624
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4956
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:3628
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:4664
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:2288
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:224
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1860
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:632
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1360
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1248
          • 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:4064
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:3196

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\nsk820.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • C:\Users\Admin\AppData\Local\Temp\nsk820.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsk820.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsk820.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsk820.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsk820.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsk820.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsk820.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsk820.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            e9a51875375c64f639c55a64c88d9f4a

            SHA1

            cd1e20e9c8005429514537fa7a7cdba148fb25c1

            SHA256

            73349c5f896f017af7ab6247d16d7553f8f976b8da0f71e5301475e04744a3a9

            SHA512

            98e93dc80e92b7109bdf6f3ffaa4d0efe751017bc96b5d999b88028fdfed1eacbcc19da502fd8696350d3a392d885c8669fb1e8b5c217c9fd989c4665b52da79

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            e9a51875375c64f639c55a64c88d9f4a

            SHA1

            cd1e20e9c8005429514537fa7a7cdba148fb25c1

            SHA256

            73349c5f896f017af7ab6247d16d7553f8f976b8da0f71e5301475e04744a3a9

            SHA512

            98e93dc80e92b7109bdf6f3ffaa4d0efe751017bc96b5d999b88028fdfed1eacbcc19da502fd8696350d3a392d885c8669fb1e8b5c217c9fd989c4665b52da79

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            e9a51875375c64f639c55a64c88d9f4a

            SHA1

            cd1e20e9c8005429514537fa7a7cdba148fb25c1

            SHA256

            73349c5f896f017af7ab6247d16d7553f8f976b8da0f71e5301475e04744a3a9

            SHA512

            98e93dc80e92b7109bdf6f3ffaa4d0efe751017bc96b5d999b88028fdfed1eacbcc19da502fd8696350d3a392d885c8669fb1e8b5c217c9fd989c4665b52da79

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            e9a51875375c64f639c55a64c88d9f4a

            SHA1

            cd1e20e9c8005429514537fa7a7cdba148fb25c1

            SHA256

            73349c5f896f017af7ab6247d16d7553f8f976b8da0f71e5301475e04744a3a9

            SHA512

            98e93dc80e92b7109bdf6f3ffaa4d0efe751017bc96b5d999b88028fdfed1eacbcc19da502fd8696350d3a392d885c8669fb1e8b5c217c9fd989c4665b52da79

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            92878cc0eb4c736d7e9716fef8558a2c

            SHA1

            36c5131a70eef7344da0a7e92401f03ff52415d5

            SHA256

            e05ae5d4c4665878c04cff2beee4e8f2fa11baed7806b70f1b498dad9654aed3

            SHA512

            24542dcb03d172265a197ba5c94622af021c063a6523580aa506074c1aa41d527f16671495c73008cb990530277de7922b55f0b13e3cb868248f1ba21dcc8622

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            92878cc0eb4c736d7e9716fef8558a2c

            SHA1

            36c5131a70eef7344da0a7e92401f03ff52415d5

            SHA256

            e05ae5d4c4665878c04cff2beee4e8f2fa11baed7806b70f1b498dad9654aed3

            SHA512

            24542dcb03d172265a197ba5c94622af021c063a6523580aa506074c1aa41d527f16671495c73008cb990530277de7922b55f0b13e3cb868248f1ba21dcc8622

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            92878cc0eb4c736d7e9716fef8558a2c

            SHA1

            36c5131a70eef7344da0a7e92401f03ff52415d5

            SHA256

            e05ae5d4c4665878c04cff2beee4e8f2fa11baed7806b70f1b498dad9654aed3

            SHA512

            24542dcb03d172265a197ba5c94622af021c063a6523580aa506074c1aa41d527f16671495c73008cb990530277de7922b55f0b13e3cb868248f1ba21dcc8622

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            e2d7a77ffaeca90f101bfcdd3d3e5d29

            SHA1

            f9abae12299d63cc099089570d44138c551522d9

            SHA256

            1d129027750b630d860ecb7586a9efa7f59bb70f048012d33779ba70a069ab33

            SHA512

            49e68802e3539110965c8555197b306706f41c3f8e6ed669acc927adc22c5ade56ccd11c2405fe6b90696e52473b11f3019d110ae8e0cb83b90c2d04d3407016

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            e2d7a77ffaeca90f101bfcdd3d3e5d29

            SHA1

            f9abae12299d63cc099089570d44138c551522d9

            SHA256

            1d129027750b630d860ecb7586a9efa7f59bb70f048012d33779ba70a069ab33

            SHA512

            49e68802e3539110965c8555197b306706f41c3f8e6ed669acc927adc22c5ade56ccd11c2405fe6b90696e52473b11f3019d110ae8e0cb83b90c2d04d3407016

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            80af9bd7dc11b8f1846655de6deb1593

            SHA1

            27a33448693efb0b365011d0c39e419c107a0709

            SHA256

            c71529f12d187405e450cb41d0001c073d2b04e294b42ac4dabc4c92c88ae5d4

            SHA512

            aacd37d8a19aec57c1cbc525ea887ce48b0ba47c72f81af892f0e0c21ce0d18f442a0752121ca91939b4700bd6fabacc60df30131d33cc835476e70253912f4e

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            80af9bd7dc11b8f1846655de6deb1593

            SHA1

            27a33448693efb0b365011d0c39e419c107a0709

            SHA256

            c71529f12d187405e450cb41d0001c073d2b04e294b42ac4dabc4c92c88ae5d4

            SHA512

            aacd37d8a19aec57c1cbc525ea887ce48b0ba47c72f81af892f0e0c21ce0d18f442a0752121ca91939b4700bd6fabacc60df30131d33cc835476e70253912f4e

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            80af9bd7dc11b8f1846655de6deb1593

            SHA1

            27a33448693efb0b365011d0c39e419c107a0709

            SHA256

            c71529f12d187405e450cb41d0001c073d2b04e294b42ac4dabc4c92c88ae5d4

            SHA512

            aacd37d8a19aec57c1cbc525ea887ce48b0ba47c72f81af892f0e0c21ce0d18f442a0752121ca91939b4700bd6fabacc60df30131d33cc835476e70253912f4e

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            e1988e8cd414c699ea51b7f046e0f483

            SHA1

            1a23cdf0f6caab8f7a93408b9a4d039ee3cf90d6

            SHA256

            25f9dcaf1d342fd9959e7639369cdddffa7985225d66b7409497b63dae1b1bea

            SHA512

            e7f7065fbfeeade595059ca3bce7f5d0d3531ea7f6b49cf31e140502fd342b51641464259fa6d0fed9dc4c339b53ed27ca021bd4f15da130f1862d35c0e2bdba

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            e1988e8cd414c699ea51b7f046e0f483

            SHA1

            1a23cdf0f6caab8f7a93408b9a4d039ee3cf90d6

            SHA256

            25f9dcaf1d342fd9959e7639369cdddffa7985225d66b7409497b63dae1b1bea

            SHA512

            e7f7065fbfeeade595059ca3bce7f5d0d3531ea7f6b49cf31e140502fd342b51641464259fa6d0fed9dc4c339b53ed27ca021bd4f15da130f1862d35c0e2bdba

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            e1988e8cd414c699ea51b7f046e0f483

            SHA1

            1a23cdf0f6caab8f7a93408b9a4d039ee3cf90d6

            SHA256

            25f9dcaf1d342fd9959e7639369cdddffa7985225d66b7409497b63dae1b1bea

            SHA512

            e7f7065fbfeeade595059ca3bce7f5d0d3531ea7f6b49cf31e140502fd342b51641464259fa6d0fed9dc4c339b53ed27ca021bd4f15da130f1862d35c0e2bdba

          • memory/224-153-0x0000000000000000-mapping.dmp

          • memory/632-159-0x0000000000000000-mapping.dmp

          • memory/1080-132-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1080-168-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1080-169-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1248-166-0x0000000000000000-mapping.dmp

          • memory/1360-165-0x0000000000000000-mapping.dmp

          • memory/1860-158-0x0000000000000000-mapping.dmp

          • memory/2288-147-0x0000000000000000-mapping.dmp

          • memory/3204-136-0x0000000000000000-mapping.dmp

          • memory/3628-141-0x0000000000000000-mapping.dmp

          • memory/4624-137-0x0000000000000000-mapping.dmp

          • memory/4664-142-0x0000000000000000-mapping.dmp

          • memory/4956-140-0x0000000000000000-mapping.dmp