Analysis

  • max time kernel
    22s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:57

General

  • Target

    43e55bfff98a8aa398b32309129c103b1f07d238cabba7c2fed21bed6eb0bac8.exe

  • Size

    446KB

  • MD5

    4e76d588e01d680464c7360febaca212

  • SHA1

    96ec615890897e1086d64bac340d1e343ea13aa4

  • SHA256

    43e55bfff98a8aa398b32309129c103b1f07d238cabba7c2fed21bed6eb0bac8

  • SHA512

    e293ff9ba1168e5ebfb5ab10bed900b2dab126a9cea5b37df55574ae4830198fb17ec71be603bb2f4467e837b8d5c7b4176b86424624cb3c098c456e68e9f0c2

  • SSDEEP

    12288:ertarp6PTlpXsnPOHIHxAD/o1gjlB+XoZq97Kqn:ertC2TjcPOHWI/oKhB+Y6

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\43e55bfff98a8aa398b32309129c103b1f07d238cabba7c2fed21bed6eb0bac8.exe
    "C:\Users\Admin\AppData\Local\Temp\43e55bfff98a8aa398b32309129c103b1f07d238cabba7c2fed21bed6eb0bac8.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:692
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1136
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:2024
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2044
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1052
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:2008
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:364
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1672
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1308
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1480
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1696
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:680
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1824
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1968

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            64f6e702eafa4963717372444f9f8177

            SHA1

            c5df6582a2018f4d3d19eff856922dbbb02b1832

            SHA256

            986bd3b3dcc0e911ec5753f45f1430408eb924a01747b5784602438cc49e42e9

            SHA512

            cd5b4b235190e7650873611535636bc9a8c0aceb2a086368f995260cf40d04766dbb53df538f13e6ee109db072c52d81f6313cc8292bf5ba9282ccb2e6b05cdd

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            0275ab0ebcf05c45cdbd60f1461eb84b

            SHA1

            2a37afbf6130a3d997ad9e57183c51dc5b1205d3

            SHA256

            e0b285814534cdda23152dd9f7d687bb8391d588ae91a5a3966fb8e64dce18b5

            SHA512

            5fe0872a149b1c4f63d1efbce77fdba140a04588ab477371ab879f1b19f3192477b792b02626c0afaef08c2cac2d3eb282418305c462ee3014825eb8c581804f

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            f8a69c47b5bc8ecd7cef4c3b1c160853

            SHA1

            baaa13c51d89642be18c9247ef015dd3c17c3a7b

            SHA256

            1cc40fe6a91b572196f4594bce7950f644133f26c1ef3f58d0f8665982a09377

            SHA512

            b7a08b57f97b6b0f010576365f45d74704f22288e5196b6ec7191629fea6a7774208e19ed092f5c6931bac3e43bcf3b762dcabda81e04c73f78661ca075350b1

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            aae6d5d490c1d145e291da9ea50a071f

            SHA1

            cfe8d986a15043f8d41c25e4479c304c731c1c0d

            SHA256

            6273ce6c5a4a4eb5d375fb9d93f8d6798cd03bb4415edb01f09b10cdc1afac79

            SHA512

            b9b4b9645207f32392dce31a51e39b0e05b95a7f4642f0fc6e195fbcd0bf5d2b50d6e025ba98aec59872f6aa727ace6fc2eaead22bfc69541bb2b6b47e0bb3df

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            aae6d5d490c1d145e291da9ea50a071f

            SHA1

            cfe8d986a15043f8d41c25e4479c304c731c1c0d

            SHA256

            6273ce6c5a4a4eb5d375fb9d93f8d6798cd03bb4415edb01f09b10cdc1afac79

            SHA512

            b9b4b9645207f32392dce31a51e39b0e05b95a7f4642f0fc6e195fbcd0bf5d2b50d6e025ba98aec59872f6aa727ace6fc2eaead22bfc69541bb2b6b47e0bb3df

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            18a9faabb0ffd4efe5795629d31b6d94

            SHA1

            861fc9d189b59238bb59dd301ed1e187cea1ad12

            SHA256

            201fe5abf593fc30942520f5df806f61ad1be2968ba1d5b10bb21f94cf7275b1

            SHA512

            b93b4fa467a7756bceff3e453d0afcd1efa184e8039d2eb78050f81e4b54086187b1a8133b3bdb946b962adfe42de2d7925b5c118c1a4ba4ad6648c5e5401bb8

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            18a9faabb0ffd4efe5795629d31b6d94

            SHA1

            861fc9d189b59238bb59dd301ed1e187cea1ad12

            SHA256

            201fe5abf593fc30942520f5df806f61ad1be2968ba1d5b10bb21f94cf7275b1

            SHA512

            b93b4fa467a7756bceff3e453d0afcd1efa184e8039d2eb78050f81e4b54086187b1a8133b3bdb946b962adfe42de2d7925b5c118c1a4ba4ad6648c5e5401bb8

          • \Users\Admin\AppData\Local\Temp\nso49C0.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nso49C0.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso49C0.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso49C0.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso49C0.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            64f6e702eafa4963717372444f9f8177

            SHA1

            c5df6582a2018f4d3d19eff856922dbbb02b1832

            SHA256

            986bd3b3dcc0e911ec5753f45f1430408eb924a01747b5784602438cc49e42e9

            SHA512

            cd5b4b235190e7650873611535636bc9a8c0aceb2a086368f995260cf40d04766dbb53df538f13e6ee109db072c52d81f6313cc8292bf5ba9282ccb2e6b05cdd

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            64f6e702eafa4963717372444f9f8177

            SHA1

            c5df6582a2018f4d3d19eff856922dbbb02b1832

            SHA256

            986bd3b3dcc0e911ec5753f45f1430408eb924a01747b5784602438cc49e42e9

            SHA512

            cd5b4b235190e7650873611535636bc9a8c0aceb2a086368f995260cf40d04766dbb53df538f13e6ee109db072c52d81f6313cc8292bf5ba9282ccb2e6b05cdd

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            64f6e702eafa4963717372444f9f8177

            SHA1

            c5df6582a2018f4d3d19eff856922dbbb02b1832

            SHA256

            986bd3b3dcc0e911ec5753f45f1430408eb924a01747b5784602438cc49e42e9

            SHA512

            cd5b4b235190e7650873611535636bc9a8c0aceb2a086368f995260cf40d04766dbb53df538f13e6ee109db072c52d81f6313cc8292bf5ba9282ccb2e6b05cdd

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            0275ab0ebcf05c45cdbd60f1461eb84b

            SHA1

            2a37afbf6130a3d997ad9e57183c51dc5b1205d3

            SHA256

            e0b285814534cdda23152dd9f7d687bb8391d588ae91a5a3966fb8e64dce18b5

            SHA512

            5fe0872a149b1c4f63d1efbce77fdba140a04588ab477371ab879f1b19f3192477b792b02626c0afaef08c2cac2d3eb282418305c462ee3014825eb8c581804f

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            0275ab0ebcf05c45cdbd60f1461eb84b

            SHA1

            2a37afbf6130a3d997ad9e57183c51dc5b1205d3

            SHA256

            e0b285814534cdda23152dd9f7d687bb8391d588ae91a5a3966fb8e64dce18b5

            SHA512

            5fe0872a149b1c4f63d1efbce77fdba140a04588ab477371ab879f1b19f3192477b792b02626c0afaef08c2cac2d3eb282418305c462ee3014825eb8c581804f

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            f8a69c47b5bc8ecd7cef4c3b1c160853

            SHA1

            baaa13c51d89642be18c9247ef015dd3c17c3a7b

            SHA256

            1cc40fe6a91b572196f4594bce7950f644133f26c1ef3f58d0f8665982a09377

            SHA512

            b7a08b57f97b6b0f010576365f45d74704f22288e5196b6ec7191629fea6a7774208e19ed092f5c6931bac3e43bcf3b762dcabda81e04c73f78661ca075350b1

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            aae6d5d490c1d145e291da9ea50a071f

            SHA1

            cfe8d986a15043f8d41c25e4479c304c731c1c0d

            SHA256

            6273ce6c5a4a4eb5d375fb9d93f8d6798cd03bb4415edb01f09b10cdc1afac79

            SHA512

            b9b4b9645207f32392dce31a51e39b0e05b95a7f4642f0fc6e195fbcd0bf5d2b50d6e025ba98aec59872f6aa727ace6fc2eaead22bfc69541bb2b6b47e0bb3df

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            18a9faabb0ffd4efe5795629d31b6d94

            SHA1

            861fc9d189b59238bb59dd301ed1e187cea1ad12

            SHA256

            201fe5abf593fc30942520f5df806f61ad1be2968ba1d5b10bb21f94cf7275b1

            SHA512

            b93b4fa467a7756bceff3e453d0afcd1efa184e8039d2eb78050f81e4b54086187b1a8133b3bdb946b962adfe42de2d7925b5c118c1a4ba4ad6648c5e5401bb8

          • memory/364-69-0x0000000000000000-mapping.dmp

          • memory/680-86-0x0000000000000000-mapping.dmp

          • memory/692-54-0x0000000075601000-0x0000000075603000-memory.dmp

            Filesize

            8KB

          • memory/1052-61-0x0000000000000000-mapping.dmp

          • memory/1136-57-0x0000000000000000-mapping.dmp

          • memory/1308-79-0x0000000000000000-mapping.dmp

          • memory/1480-80-0x0000000000000000-mapping.dmp

          • memory/1672-75-0x0000000000000000-mapping.dmp

          • memory/1696-85-0x0000000000000000-mapping.dmp

          • memory/2008-63-0x0000000000000000-mapping.dmp

          • memory/2024-58-0x0000000000000000-mapping.dmp

          • memory/2044-60-0x0000000000000000-mapping.dmp