Analysis

  • max time kernel
    164s
  • max time network
    168s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-11-2022 00:20

General

  • Target

    a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe

  • Size

    695KB

  • MD5

    150ae0a06e80349ea46d2061bdd81daf

  • SHA1

    fdc6b0f20ef3a94a43386884d45f40db7f1aecf7

  • SHA256

    a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946

  • SHA512

    4882afdfea2bab4c9b708bcb16f0beed6cf9a501dacd7be8a89071fcd40008aacd2bb72e74852222fcfe787fc67fcea85017e207e9f5cdce3b93f8a75525de43

  • SSDEEP

    12288:OAbu3fQ+thk6EzvbfGuL9ZCBkOx/8+GBHeR8zvhjqu3SZ5XgllVL3:OAbuPPEzzfj9OkKwHeizQuSAlVL3

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\a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.exe
    "C:\Users\Admin\AppData\Local\Temp\a8ff9fc81b1ffa4e42a0e7939db93bc9b4bb754463b82c92e799569a2b61c946.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:380
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1264
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1828
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:400
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:4352
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:4164
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:3380
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:3484
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1156
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1644
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:4796
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:2576
          • 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:3184
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:2232

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\nstD23B.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • C:\Users\Admin\AppData\Local\Temp\nstD23B.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nstD23B.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nstD23B.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nstD23B.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nstD23B.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nstD23B.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nstD23B.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nstD23B.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            bd0e50d970dd138bf888f4c09dc123ef

            SHA1

            1806b4e71ebcca3bc65c35ef7db952836aef2e56

            SHA256

            85d5260b3d3674c7c8a4897c1bdb619ca70d472c4471d3f961625d66634f874c

            SHA512

            33d065c2900253529e95ef51c86b5c6880b5459b920ad8a27b98fbae92ef8d2fea842b7667ce51a035c2742b7ccd48034e76960e0696c8d9d3ec0f6594bc3377

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            bd0e50d970dd138bf888f4c09dc123ef

            SHA1

            1806b4e71ebcca3bc65c35ef7db952836aef2e56

            SHA256

            85d5260b3d3674c7c8a4897c1bdb619ca70d472c4471d3f961625d66634f874c

            SHA512

            33d065c2900253529e95ef51c86b5c6880b5459b920ad8a27b98fbae92ef8d2fea842b7667ce51a035c2742b7ccd48034e76960e0696c8d9d3ec0f6594bc3377

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            bd0e50d970dd138bf888f4c09dc123ef

            SHA1

            1806b4e71ebcca3bc65c35ef7db952836aef2e56

            SHA256

            85d5260b3d3674c7c8a4897c1bdb619ca70d472c4471d3f961625d66634f874c

            SHA512

            33d065c2900253529e95ef51c86b5c6880b5459b920ad8a27b98fbae92ef8d2fea842b7667ce51a035c2742b7ccd48034e76960e0696c8d9d3ec0f6594bc3377

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            bd0e50d970dd138bf888f4c09dc123ef

            SHA1

            1806b4e71ebcca3bc65c35ef7db952836aef2e56

            SHA256

            85d5260b3d3674c7c8a4897c1bdb619ca70d472c4471d3f961625d66634f874c

            SHA512

            33d065c2900253529e95ef51c86b5c6880b5459b920ad8a27b98fbae92ef8d2fea842b7667ce51a035c2742b7ccd48034e76960e0696c8d9d3ec0f6594bc3377

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            25de08e9a910fb59dfbb225d42458f18

            SHA1

            7706ece5a75d2026009b2ec693336457ce5ba6bd

            SHA256

            32a8feec0c8996ce1f113b4c2c6ea6bb91aa282a60ad72320d7facfa843c1240

            SHA512

            64457d13a12b2c3993a65bd5f6e283da9f9709eed08dca94fd979293f3201ea3f71800b189c52eabac4820378f1866d61759cd6d8f9bd5d011dce629e3a219f9

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            25de08e9a910fb59dfbb225d42458f18

            SHA1

            7706ece5a75d2026009b2ec693336457ce5ba6bd

            SHA256

            32a8feec0c8996ce1f113b4c2c6ea6bb91aa282a60ad72320d7facfa843c1240

            SHA512

            64457d13a12b2c3993a65bd5f6e283da9f9709eed08dca94fd979293f3201ea3f71800b189c52eabac4820378f1866d61759cd6d8f9bd5d011dce629e3a219f9

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            25de08e9a910fb59dfbb225d42458f18

            SHA1

            7706ece5a75d2026009b2ec693336457ce5ba6bd

            SHA256

            32a8feec0c8996ce1f113b4c2c6ea6bb91aa282a60ad72320d7facfa843c1240

            SHA512

            64457d13a12b2c3993a65bd5f6e283da9f9709eed08dca94fd979293f3201ea3f71800b189c52eabac4820378f1866d61759cd6d8f9bd5d011dce629e3a219f9

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            1f16914d356a4081f689f04fa6c046ad

            SHA1

            09729ccd3d81028d4cca8b9056d167f4d7c03d64

            SHA256

            a6a7a20173b4519e203af0dbd2a59d666fc8ccf88bae51cc5a8d9330f3bc31d8

            SHA512

            1ec74e16eda2bece11936d309d6be8ce17a297435deaecf841adaedbb258840eb4d075ea0c97d710c93c3954babe76da38dbfe1dfb4099d6472562d64ac7fd02

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            1f16914d356a4081f689f04fa6c046ad

            SHA1

            09729ccd3d81028d4cca8b9056d167f4d7c03d64

            SHA256

            a6a7a20173b4519e203af0dbd2a59d666fc8ccf88bae51cc5a8d9330f3bc31d8

            SHA512

            1ec74e16eda2bece11936d309d6be8ce17a297435deaecf841adaedbb258840eb4d075ea0c97d710c93c3954babe76da38dbfe1dfb4099d6472562d64ac7fd02

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            0bf35c4872e5591fd31da133ba3885c6

            SHA1

            5e8e37a76f9eedded93f7510614ffc4ab4ebf111

            SHA256

            aec0fb75ae8a1033ff935b9e5e82962594a77814a6f7c186a3b298febea76fd0

            SHA512

            2ee395ca31dfac4377c8860be3becad26392e60fdd9e9b5bbe2b12cfeec4409593f6fb9b71cff1822cc32b967f26471623041b7c9c8f7fab75b6225d61b2ddb3

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            0bf35c4872e5591fd31da133ba3885c6

            SHA1

            5e8e37a76f9eedded93f7510614ffc4ab4ebf111

            SHA256

            aec0fb75ae8a1033ff935b9e5e82962594a77814a6f7c186a3b298febea76fd0

            SHA512

            2ee395ca31dfac4377c8860be3becad26392e60fdd9e9b5bbe2b12cfeec4409593f6fb9b71cff1822cc32b967f26471623041b7c9c8f7fab75b6225d61b2ddb3

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            0bf35c4872e5591fd31da133ba3885c6

            SHA1

            5e8e37a76f9eedded93f7510614ffc4ab4ebf111

            SHA256

            aec0fb75ae8a1033ff935b9e5e82962594a77814a6f7c186a3b298febea76fd0

            SHA512

            2ee395ca31dfac4377c8860be3becad26392e60fdd9e9b5bbe2b12cfeec4409593f6fb9b71cff1822cc32b967f26471623041b7c9c8f7fab75b6225d61b2ddb3

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            2ddf62814724098ba56896e8f609eec4

            SHA1

            c4ed0161365491863735f37fda7ff0b9fb10e128

            SHA256

            247c423542adecc4a063c4fc1a287f50533323542aed89f910a4f7369d5eae93

            SHA512

            47a3f34baba755ad9e4884ae3bd7a48fa1a5df59c88d191ec093edb52557df8ede70e106cb0e3201c111cfa94abf158768cc3368c2e7c1355e08b4127a277d6f

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            2ddf62814724098ba56896e8f609eec4

            SHA1

            c4ed0161365491863735f37fda7ff0b9fb10e128

            SHA256

            247c423542adecc4a063c4fc1a287f50533323542aed89f910a4f7369d5eae93

            SHA512

            47a3f34baba755ad9e4884ae3bd7a48fa1a5df59c88d191ec093edb52557df8ede70e106cb0e3201c111cfa94abf158768cc3368c2e7c1355e08b4127a277d6f

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            2ddf62814724098ba56896e8f609eec4

            SHA1

            c4ed0161365491863735f37fda7ff0b9fb10e128

            SHA256

            247c423542adecc4a063c4fc1a287f50533323542aed89f910a4f7369d5eae93

            SHA512

            47a3f34baba755ad9e4884ae3bd7a48fa1a5df59c88d191ec093edb52557df8ede70e106cb0e3201c111cfa94abf158768cc3368c2e7c1355e08b4127a277d6f

          • memory/380-147-0x0000000000340000-0x00000000007BE000-memory.dmp

            Filesize

            4.5MB

          • memory/380-169-0x0000000000340000-0x00000000007BE000-memory.dmp

            Filesize

            4.5MB

          • memory/380-132-0x0000000000340000-0x00000000007BE000-memory.dmp

            Filesize

            4.5MB

          • memory/400-140-0x0000000000000000-mapping.dmp

          • memory/1156-159-0x0000000000000000-mapping.dmp

          • memory/1264-136-0x0000000000000000-mapping.dmp

          • memory/1644-160-0x0000000000000000-mapping.dmp

          • memory/1828-137-0x0000000000000000-mapping.dmp

          • memory/2576-167-0x0000000000000000-mapping.dmp

          • memory/3380-148-0x0000000000000000-mapping.dmp

          • memory/3484-154-0x0000000000000000-mapping.dmp

          • memory/4164-142-0x0000000000000000-mapping.dmp

          • memory/4352-141-0x0000000000000000-mapping.dmp

          • memory/4796-166-0x0000000000000000-mapping.dmp