Analysis

  • max time kernel
    44s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:52

General

  • Target

    b9bfd4eec90dc927a99bfa2070734246c37c67105b34234c1161dc1c17a8d558.exe

  • Size

    446KB

  • MD5

    3bd7fd6c682a3455e04e6af5495da7a5

  • SHA1

    4a72b8d9207c5f5ca59d40f80eb61bd16d09ff0d

  • SHA256

    b9bfd4eec90dc927a99bfa2070734246c37c67105b34234c1161dc1c17a8d558

  • SHA512

    36612dae4aa04841cdb41cdf209c46ef8e1cc2d1d003abb6c017bd4deafbaabdbbfaab394a594f46c082db3b5bfa1da1ffae1a10d27888304da6de10bb01d115

  • SSDEEP

    6144:XzfUr37cXajbETJ/Ar7FTgl6TiZQUXyNLLSrV08RH6iLyh+JUneOXRGKG/8cva+Y:ALAXasslglBXi4V5xw8JUeAtcv0HB3

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\b9bfd4eec90dc927a99bfa2070734246c37c67105b34234c1161dc1c17a8d558.exe
    "C:\Users\Admin\AppData\Local\Temp\b9bfd4eec90dc927a99bfa2070734246c37c67105b34234c1161dc1c17a8d558.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:2028
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:944
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:888
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:768
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:980
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:892
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1256
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:764
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1176
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1964
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:976
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:832
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1324
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1172

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            d68fdd65b71b28abf18ec8d94baa8496

            SHA1

            06bdcd970da4fc053f3b1e80140994ca4dd6d569

            SHA256

            5f1420e61430afefb96398c2646ebb455b06266b6bc2d5a5d0e6e45ae4ec1a3f

            SHA512

            afa3d692ec76d7d509cbe02ee581518fe912660272ae23a9422cd540b284bcaee80df2aa2cfd2caa18f1190a7f5feeba5c3267c4c77c2ecdcf23049e6cb49fec

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            12635179547578f9963bc15a81da2d4c

            SHA1

            e946cc28b8d5ba077f13f9f1536d186c0c3c2e91

            SHA256

            c953ef6c57c3f0eae4d6b57cf443a6f2fa23982da4cabe62f8e94952b258cfe6

            SHA512

            87fb62f60f6e3a0147e993bf3567ef4d6073f18cbaf8e3a474be37411ca8c96dd4ce5c35261decf8402700a392218bfebcaf0b6a9fddc594431bcc125bed82c4

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            21dd396ac1f385d46fdcb5e24f95b94a

            SHA1

            e62297138a69d01d30f3b20ffcce8711196d4247

            SHA256

            1664142ee47ce50902cc58cf2c85c0c45eeae15fcba2eaff98bd45124b1fbccb

            SHA512

            8ba3e2c4595857d645cf2a1f618ba24925a8d950eb7b4f880a46b96ce82293be5e1667604330701d0cc9695fdacc447b73faa2668ffeecceaca016add5f43fff

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            8c91109df7c4b9b5676e41ef6936f5db

            SHA1

            53e65ae4d94487084c89c4ba1e006962b24f1530

            SHA256

            1aeb8e980e1d1291e9fe6cda75958552247428fbd4ab48d677fe7a35d65f6c15

            SHA512

            e515f4595e92c879c02cf819e207ddf0c8c9cd02e32015d4fb45335917114ac0b80337e4f9f54cfb8c7303f32ed9a07a6ff26ac6af6a8e9051ae81da87e6d6e2

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            8c91109df7c4b9b5676e41ef6936f5db

            SHA1

            53e65ae4d94487084c89c4ba1e006962b24f1530

            SHA256

            1aeb8e980e1d1291e9fe6cda75958552247428fbd4ab48d677fe7a35d65f6c15

            SHA512

            e515f4595e92c879c02cf819e207ddf0c8c9cd02e32015d4fb45335917114ac0b80337e4f9f54cfb8c7303f32ed9a07a6ff26ac6af6a8e9051ae81da87e6d6e2

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            ab659ab10fd784a137576f294f59f827

            SHA1

            3e7fe5a11695d8c981f51a37b2745c4484732ddb

            SHA256

            04cdf8a7559a7dd78b3b4a2eab25b1171e702952dcf125eec19a8d87db693b2a

            SHA512

            6da52788c37b41448fa2a0de91b005204f2f57fce4aad2385097298c484ef2a6ed196c6b3dd5a3f5080f55e3cf9877a2b4c79c6faa9b04498259a1f2cccc3e1f

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            ab659ab10fd784a137576f294f59f827

            SHA1

            3e7fe5a11695d8c981f51a37b2745c4484732ddb

            SHA256

            04cdf8a7559a7dd78b3b4a2eab25b1171e702952dcf125eec19a8d87db693b2a

            SHA512

            6da52788c37b41448fa2a0de91b005204f2f57fce4aad2385097298c484ef2a6ed196c6b3dd5a3f5080f55e3cf9877a2b4c79c6faa9b04498259a1f2cccc3e1f

          • \Users\Admin\AppData\Local\Temp\nst6D7.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nst6D7.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst6D7.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst6D7.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst6D7.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            d68fdd65b71b28abf18ec8d94baa8496

            SHA1

            06bdcd970da4fc053f3b1e80140994ca4dd6d569

            SHA256

            5f1420e61430afefb96398c2646ebb455b06266b6bc2d5a5d0e6e45ae4ec1a3f

            SHA512

            afa3d692ec76d7d509cbe02ee581518fe912660272ae23a9422cd540b284bcaee80df2aa2cfd2caa18f1190a7f5feeba5c3267c4c77c2ecdcf23049e6cb49fec

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            d68fdd65b71b28abf18ec8d94baa8496

            SHA1

            06bdcd970da4fc053f3b1e80140994ca4dd6d569

            SHA256

            5f1420e61430afefb96398c2646ebb455b06266b6bc2d5a5d0e6e45ae4ec1a3f

            SHA512

            afa3d692ec76d7d509cbe02ee581518fe912660272ae23a9422cd540b284bcaee80df2aa2cfd2caa18f1190a7f5feeba5c3267c4c77c2ecdcf23049e6cb49fec

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            d68fdd65b71b28abf18ec8d94baa8496

            SHA1

            06bdcd970da4fc053f3b1e80140994ca4dd6d569

            SHA256

            5f1420e61430afefb96398c2646ebb455b06266b6bc2d5a5d0e6e45ae4ec1a3f

            SHA512

            afa3d692ec76d7d509cbe02ee581518fe912660272ae23a9422cd540b284bcaee80df2aa2cfd2caa18f1190a7f5feeba5c3267c4c77c2ecdcf23049e6cb49fec

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            12635179547578f9963bc15a81da2d4c

            SHA1

            e946cc28b8d5ba077f13f9f1536d186c0c3c2e91

            SHA256

            c953ef6c57c3f0eae4d6b57cf443a6f2fa23982da4cabe62f8e94952b258cfe6

            SHA512

            87fb62f60f6e3a0147e993bf3567ef4d6073f18cbaf8e3a474be37411ca8c96dd4ce5c35261decf8402700a392218bfebcaf0b6a9fddc594431bcc125bed82c4

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            12635179547578f9963bc15a81da2d4c

            SHA1

            e946cc28b8d5ba077f13f9f1536d186c0c3c2e91

            SHA256

            c953ef6c57c3f0eae4d6b57cf443a6f2fa23982da4cabe62f8e94952b258cfe6

            SHA512

            87fb62f60f6e3a0147e993bf3567ef4d6073f18cbaf8e3a474be37411ca8c96dd4ce5c35261decf8402700a392218bfebcaf0b6a9fddc594431bcc125bed82c4

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            21dd396ac1f385d46fdcb5e24f95b94a

            SHA1

            e62297138a69d01d30f3b20ffcce8711196d4247

            SHA256

            1664142ee47ce50902cc58cf2c85c0c45eeae15fcba2eaff98bd45124b1fbccb

            SHA512

            8ba3e2c4595857d645cf2a1f618ba24925a8d950eb7b4f880a46b96ce82293be5e1667604330701d0cc9695fdacc447b73faa2668ffeecceaca016add5f43fff

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            8c91109df7c4b9b5676e41ef6936f5db

            SHA1

            53e65ae4d94487084c89c4ba1e006962b24f1530

            SHA256

            1aeb8e980e1d1291e9fe6cda75958552247428fbd4ab48d677fe7a35d65f6c15

            SHA512

            e515f4595e92c879c02cf819e207ddf0c8c9cd02e32015d4fb45335917114ac0b80337e4f9f54cfb8c7303f32ed9a07a6ff26ac6af6a8e9051ae81da87e6d6e2

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            ab659ab10fd784a137576f294f59f827

            SHA1

            3e7fe5a11695d8c981f51a37b2745c4484732ddb

            SHA256

            04cdf8a7559a7dd78b3b4a2eab25b1171e702952dcf125eec19a8d87db693b2a

            SHA512

            6da52788c37b41448fa2a0de91b005204f2f57fce4aad2385097298c484ef2a6ed196c6b3dd5a3f5080f55e3cf9877a2b4c79c6faa9b04498259a1f2cccc3e1f

          • memory/764-75-0x0000000000000000-mapping.dmp

          • memory/768-60-0x0000000000000000-mapping.dmp

          • memory/832-86-0x0000000000000000-mapping.dmp

          • memory/888-58-0x0000000000000000-mapping.dmp

          • memory/892-63-0x0000000000000000-mapping.dmp

          • memory/944-57-0x0000000000000000-mapping.dmp

          • memory/976-85-0x0000000000000000-mapping.dmp

          • memory/980-61-0x0000000000000000-mapping.dmp

          • memory/1176-79-0x0000000000000000-mapping.dmp

          • memory/1256-69-0x0000000000000000-mapping.dmp

          • memory/1964-80-0x0000000000000000-mapping.dmp

          • memory/2028-54-0x00000000759F1000-0x00000000759F3000-memory.dmp

            Filesize

            8KB