Analysis

  • max time kernel
    163s
  • max time network
    171s
  • 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 10:52

General

  • Target

    b81cff167b4c447ef4efacc6abe649773615894acac28120d217869a14c9f5ba.exe

  • Size

    445KB

  • MD5

    1a95c2df88aa2780ba3ffba638af474f

  • SHA1

    282abed0fc03787855df6bd47fc7f6e9e51da2bb

  • SHA256

    b81cff167b4c447ef4efacc6abe649773615894acac28120d217869a14c9f5ba

  • SHA512

    e47db44d4214585517b1438d9195080e1d8af55532865c7cde5656c9a5418c3b8b6db84dec2f2c961476076a535d9c0af09f756e2f96d51d9723def14e4b5b15

  • SSDEEP

    12288:jM74ZJoy0mpWN2OMhMBheG4Dvo1z/lqZrIqe6:jM74ZJWIWN2OMhMBAG4Dk9yIql

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\b81cff167b4c447ef4efacc6abe649773615894acac28120d217869a14c9f5ba.exe
    "C:\Users\Admin\AppData\Local\Temp\b81cff167b4c447ef4efacc6abe649773615894acac28120d217869a14c9f5ba.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:552
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3092
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:4872
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1004
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:4332
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1208
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:5040
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:3176
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:32
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:228
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:3300
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:4556
          • 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:3540
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:3848

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\nseB906.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • C:\Users\Admin\AppData\Local\Temp\nseB906.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nseB906.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nseB906.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nseB906.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nseB906.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nseB906.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nseB906.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nseB906.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            7d20fa23fe0266356282bfa8f21c7d73

            SHA1

            fa366fe922b9091adde113204d3c672d57fcae5f

            SHA256

            df7b63654d615d2141a96f8356a816a3b7b1cda4bd416f4733032f1da5a25d24

            SHA512

            042ab267a513b6ecc33ea95771c2709eb36fa155d5f9d2bfbc13f2cf0ad5499494727690c15282ddfeaa25bd9080be9bdeb6b35c01d23b2e58bf88ab3c7a2517

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            7d20fa23fe0266356282bfa8f21c7d73

            SHA1

            fa366fe922b9091adde113204d3c672d57fcae5f

            SHA256

            df7b63654d615d2141a96f8356a816a3b7b1cda4bd416f4733032f1da5a25d24

            SHA512

            042ab267a513b6ecc33ea95771c2709eb36fa155d5f9d2bfbc13f2cf0ad5499494727690c15282ddfeaa25bd9080be9bdeb6b35c01d23b2e58bf88ab3c7a2517

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            7d20fa23fe0266356282bfa8f21c7d73

            SHA1

            fa366fe922b9091adde113204d3c672d57fcae5f

            SHA256

            df7b63654d615d2141a96f8356a816a3b7b1cda4bd416f4733032f1da5a25d24

            SHA512

            042ab267a513b6ecc33ea95771c2709eb36fa155d5f9d2bfbc13f2cf0ad5499494727690c15282ddfeaa25bd9080be9bdeb6b35c01d23b2e58bf88ab3c7a2517

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            7d20fa23fe0266356282bfa8f21c7d73

            SHA1

            fa366fe922b9091adde113204d3c672d57fcae5f

            SHA256

            df7b63654d615d2141a96f8356a816a3b7b1cda4bd416f4733032f1da5a25d24

            SHA512

            042ab267a513b6ecc33ea95771c2709eb36fa155d5f9d2bfbc13f2cf0ad5499494727690c15282ddfeaa25bd9080be9bdeb6b35c01d23b2e58bf88ab3c7a2517

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            33940518e01a0e60867f34193f11b9f9

            SHA1

            a58e456de9546f512cc9fbc3e8def2ffcfee4a2b

            SHA256

            e6a0e21e0230268c03b7a4eb03860b181cbc26e20eaae30e9b32211d2716e00e

            SHA512

            ac6f1fccf8f07db51288cb8679f6eabde1162fdb3e3c020cf7524aa37a8a44b2fcc5604d18a2a8faf196124e852fb18810d59b134d5af1b9975d1867788fa8a6

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            33940518e01a0e60867f34193f11b9f9

            SHA1

            a58e456de9546f512cc9fbc3e8def2ffcfee4a2b

            SHA256

            e6a0e21e0230268c03b7a4eb03860b181cbc26e20eaae30e9b32211d2716e00e

            SHA512

            ac6f1fccf8f07db51288cb8679f6eabde1162fdb3e3c020cf7524aa37a8a44b2fcc5604d18a2a8faf196124e852fb18810d59b134d5af1b9975d1867788fa8a6

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            33940518e01a0e60867f34193f11b9f9

            SHA1

            a58e456de9546f512cc9fbc3e8def2ffcfee4a2b

            SHA256

            e6a0e21e0230268c03b7a4eb03860b181cbc26e20eaae30e9b32211d2716e00e

            SHA512

            ac6f1fccf8f07db51288cb8679f6eabde1162fdb3e3c020cf7524aa37a8a44b2fcc5604d18a2a8faf196124e852fb18810d59b134d5af1b9975d1867788fa8a6

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            8da0714df6f17041239f4a39f952dddf

            SHA1

            d476f076c1601a7cbecd210dee33995a5527cece

            SHA256

            35d7ce86e79a7d57ebc86e15afcd1a3723089f064bc0f3ef1d8ffa0dc6c983f2

            SHA512

            6b1ff79173f8e7cab8c0651ce3c68962e13f2758c9befc038cda21be62f42fda3941d32c7503300e1c655cd0a0f5cd83ea3c566184172696e8e4aaeda2eb05b4

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            8da0714df6f17041239f4a39f952dddf

            SHA1

            d476f076c1601a7cbecd210dee33995a5527cece

            SHA256

            35d7ce86e79a7d57ebc86e15afcd1a3723089f064bc0f3ef1d8ffa0dc6c983f2

            SHA512

            6b1ff79173f8e7cab8c0651ce3c68962e13f2758c9befc038cda21be62f42fda3941d32c7503300e1c655cd0a0f5cd83ea3c566184172696e8e4aaeda2eb05b4

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1a1f8624f05752a1304bad41d59129ce

            SHA1

            886464f57b5a90c5ec9d380b085bc54176259f74

            SHA256

            c457c37762bcb0efb140d688a61687c17bd88084b0c00122f02c73069ce78dc4

            SHA512

            e377c1d4be69574922ca5a1b1fe255f3d736d24ecea8a6eeaf1005dbdd229c9ab1c9c8744fd248d7305115b54676679abd4c0aa4361f35aea7df2891ba0facee

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1a1f8624f05752a1304bad41d59129ce

            SHA1

            886464f57b5a90c5ec9d380b085bc54176259f74

            SHA256

            c457c37762bcb0efb140d688a61687c17bd88084b0c00122f02c73069ce78dc4

            SHA512

            e377c1d4be69574922ca5a1b1fe255f3d736d24ecea8a6eeaf1005dbdd229c9ab1c9c8744fd248d7305115b54676679abd4c0aa4361f35aea7df2891ba0facee

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1a1f8624f05752a1304bad41d59129ce

            SHA1

            886464f57b5a90c5ec9d380b085bc54176259f74

            SHA256

            c457c37762bcb0efb140d688a61687c17bd88084b0c00122f02c73069ce78dc4

            SHA512

            e377c1d4be69574922ca5a1b1fe255f3d736d24ecea8a6eeaf1005dbdd229c9ab1c9c8744fd248d7305115b54676679abd4c0aa4361f35aea7df2891ba0facee

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            c6807f7532f66b43d8a1edb39eafbaa1

            SHA1

            b2668208a1b986029dbbfc11b560fe3242faf9dc

            SHA256

            6a51f1974e742284d6d5103ef883b4affaf786ed990aa19ccf0f1695265faa50

            SHA512

            69e427ae094ddcf33dee760c5f7b0af580ddc7c9a77e7b68ae64b65974f8c971ddf2974dc48501e71ffa30c9e28fcbb7498737f06ea40e5af3fea84ac0ae1bda

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            c6807f7532f66b43d8a1edb39eafbaa1

            SHA1

            b2668208a1b986029dbbfc11b560fe3242faf9dc

            SHA256

            6a51f1974e742284d6d5103ef883b4affaf786ed990aa19ccf0f1695265faa50

            SHA512

            69e427ae094ddcf33dee760c5f7b0af580ddc7c9a77e7b68ae64b65974f8c971ddf2974dc48501e71ffa30c9e28fcbb7498737f06ea40e5af3fea84ac0ae1bda

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            c6807f7532f66b43d8a1edb39eafbaa1

            SHA1

            b2668208a1b986029dbbfc11b560fe3242faf9dc

            SHA256

            6a51f1974e742284d6d5103ef883b4affaf786ed990aa19ccf0f1695265faa50

            SHA512

            69e427ae094ddcf33dee760c5f7b0af580ddc7c9a77e7b68ae64b65974f8c971ddf2974dc48501e71ffa30c9e28fcbb7498737f06ea40e5af3fea84ac0ae1bda

          • memory/32-157-0x0000000000000000-mapping.dmp

          • memory/228-158-0x0000000000000000-mapping.dmp

          • memory/1004-139-0x0000000000000000-mapping.dmp

          • memory/1208-141-0x0000000000000000-mapping.dmp

          • memory/3092-135-0x0000000000000000-mapping.dmp

          • memory/3176-152-0x0000000000000000-mapping.dmp

          • memory/3300-164-0x0000000000000000-mapping.dmp

          • memory/4332-140-0x0000000000000000-mapping.dmp

          • memory/4556-165-0x0000000000000000-mapping.dmp

          • memory/4872-136-0x0000000000000000-mapping.dmp

          • memory/5040-146-0x0000000000000000-mapping.dmp