Analysis

  • max time kernel
    31s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    21/11/2022, 23:54

General

  • Target

    bf77ec648dde6a96f1c45831c5b06fe2a7b9aa063e4181a2b6beafb253dacb2e.exe

  • Size

    602KB

  • MD5

    791f7c56675f02071b87d412ae154db2

  • SHA1

    86b5ee85a0da300b0cc98ac750ea3ebab86d596e

  • SHA256

    bf77ec648dde6a96f1c45831c5b06fe2a7b9aa063e4181a2b6beafb253dacb2e

  • SHA512

    cbb524210facfdd0c5a05d2a26b1e893f09b7c37554b5d16195449d8e40dbee6656b51ae810b64749688e1d838e8cdc85db1e5d817ea035d0cdeb771be849deb

  • SSDEEP

    12288:rIny5DYTj+0kRmERIj7MXCcYLFyryhFzihFGJ7c9WLBitb:TUTj6RJqj7IWLcrczrJBL

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\bf77ec648dde6a96f1c45831c5b06fe2a7b9aa063e4181a2b6beafb253dacb2e.exe
    "C:\Users\Admin\AppData\Local\Temp\bf77ec648dde6a96f1c45831c5b06fe2a7b9aa063e4181a2b6beafb253dacb2e.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:1392
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1600
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1272
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2040
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:2036
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1052
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1716
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1952
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:584
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1108
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1772
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:276
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1328
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1056

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                • C:\Windows\SysWOW64\hfnapi.dll

                  Filesize

                  106KB

                  MD5

                  9788195bca4b551ba9b8e81e0f658c4c

                  SHA1

                  63ec9bdafbd42d9f46b71559a542f73e4b181660

                  SHA256

                  0e14807fc2ba670a3186a95273350f7063727862a403e0e3c276da3bba6ce493

                  SHA512

                  7e160eb2b5b78d5a42eedea142f59a6b57b828797a1cfe52ac00a228aeca2f4a3112d08cb7250f5727e5789caab4e2faeaf456dbd4c30c5cea70fb98b7b4d93d

                • C:\Windows\SysWOW64\hfpapi.dll

                  Filesize

                  241KB

                  MD5

                  833f296ef4ca68a687066c5aa4b4e0a0

                  SHA1

                  643c3f4b1c1c5afa6cf8c63c3cf13e556f5e555a

                  SHA256

                  501bcb337e1a2505738848a354b60ecdbf0d29e7c207f01c8366e3499de775ed

                  SHA512

                  f42152da8033952614b2590470d413241795c72075f1eed676bd248d7c7b8260bc91db9382e0d3127d6b0a16df021f2c7b7f2d16eec6e724db3f44b4c0389143

                • C:\Windows\SysWOW64\installd.exe

                  Filesize

                  108KB

                  MD5

                  da81b9b6bdbfa959cf16b88e1e81fec8

                  SHA1

                  f4935d4e81e84e7fa7d049f30afad3fae63e01ba

                  SHA256

                  3d7f69b54ee9f07d4ce50701d2d6d9689380cabe767682aedaa2d1ad1b0877f6

                  SHA512

                  9ec1f7e5041236220658568a3ff0b8a35fff1537e8b1097e89adbe0d2ad751fe193112302c6e36d73795ce4862a3c469d02684f8d83eb71fd9edd321ae67ba97

                • C:\Windows\SysWOW64\nethtsrv.exe

                  Filesize

                  176KB

                  MD5

                  e361d5b779a0b682e3d03071a6a006dc

                  SHA1

                  e781be71c01d1995cabc12ab778b2e03a43ffbb9

                  SHA256

                  24f8fd6ba3bda766608cce8473a4b3f7018fba435da48439bd4a6c26b0d39b0f

                  SHA512

                  79fc570abef21639960a82dbc46e176e545f7e3cf11c749390b6cc751de7a8d08aa86d8d58950b419fd910d7be6a4289f60bf21ff8f80ef556cdfcab32cdee1c

                • C:\Windows\SysWOW64\nethtsrv.exe

                  Filesize

                  176KB

                  MD5

                  e361d5b779a0b682e3d03071a6a006dc

                  SHA1

                  e781be71c01d1995cabc12ab778b2e03a43ffbb9

                  SHA256

                  24f8fd6ba3bda766608cce8473a4b3f7018fba435da48439bd4a6c26b0d39b0f

                  SHA512

                  79fc570abef21639960a82dbc46e176e545f7e3cf11c749390b6cc751de7a8d08aa86d8d58950b419fd910d7be6a4289f60bf21ff8f80ef556cdfcab32cdee1c

                • C:\Windows\SysWOW64\netupdsrv.exe

                  Filesize

                  159KB

                  MD5

                  f723b534d59e22f8553e80ce09ebc767

                  SHA1

                  f423abb0eb71a9feb88c3447dd2e86f46bf80196

                  SHA256

                  34ebf710a9536061a3d683a63b9eaa430b33757101917f814ae33808784832a1

                  SHA512

                  bb829572f08bbd10e5c81af01f9c34f5fb8d4cdca316e5709eb89ecad9219f06d735ce596e12b16e7891976375605a26a767570cfbafc855057829fa563a62a9

                • C:\Windows\SysWOW64\netupdsrv.exe

                  Filesize

                  159KB

                  MD5

                  f723b534d59e22f8553e80ce09ebc767

                  SHA1

                  f423abb0eb71a9feb88c3447dd2e86f46bf80196

                  SHA256

                  34ebf710a9536061a3d683a63b9eaa430b33757101917f814ae33808784832a1

                  SHA512

                  bb829572f08bbd10e5c81af01f9c34f5fb8d4cdca316e5709eb89ecad9219f06d735ce596e12b16e7891976375605a26a767570cfbafc855057829fa563a62a9

                • \Users\Admin\AppData\Local\Temp\nsd2455.tmp\System.dll

                  Filesize

                  11KB

                  MD5

                  c17103ae9072a06da581dec998343fc1

                  SHA1

                  b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

                  SHA256

                  dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

                  SHA512

                  d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

                • \Users\Admin\AppData\Local\Temp\nsd2455.tmp\nsExec.dll

                  Filesize

                  6KB

                  MD5

                  acc2b699edfea5bf5aae45aba3a41e96

                  SHA1

                  d2accf4d494e43ceb2cff69abe4dd17147d29cc2

                  SHA256

                  168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

                  SHA512

                  e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

                • \Users\Admin\AppData\Local\Temp\nsd2455.tmp\nsExec.dll

                  Filesize

                  6KB

                  MD5

                  acc2b699edfea5bf5aae45aba3a41e96

                  SHA1

                  d2accf4d494e43ceb2cff69abe4dd17147d29cc2

                  SHA256

                  168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

                  SHA512

                  e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

                • \Users\Admin\AppData\Local\Temp\nsd2455.tmp\nsExec.dll

                  Filesize

                  6KB

                  MD5

                  acc2b699edfea5bf5aae45aba3a41e96

                  SHA1

                  d2accf4d494e43ceb2cff69abe4dd17147d29cc2

                  SHA256

                  168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

                  SHA512

                  e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

                • \Users\Admin\AppData\Local\Temp\nsd2455.tmp\nsExec.dll

                  Filesize

                  6KB

                  MD5

                  acc2b699edfea5bf5aae45aba3a41e96

                  SHA1

                  d2accf4d494e43ceb2cff69abe4dd17147d29cc2

                  SHA256

                  168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

                  SHA512

                  e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

                • \Windows\SysWOW64\hfnapi.dll

                  Filesize

                  106KB

                  MD5

                  9788195bca4b551ba9b8e81e0f658c4c

                  SHA1

                  63ec9bdafbd42d9f46b71559a542f73e4b181660

                  SHA256

                  0e14807fc2ba670a3186a95273350f7063727862a403e0e3c276da3bba6ce493

                  SHA512

                  7e160eb2b5b78d5a42eedea142f59a6b57b828797a1cfe52ac00a228aeca2f4a3112d08cb7250f5727e5789caab4e2faeaf456dbd4c30c5cea70fb98b7b4d93d

                • \Windows\SysWOW64\hfnapi.dll

                  Filesize

                  106KB

                  MD5

                  9788195bca4b551ba9b8e81e0f658c4c

                  SHA1

                  63ec9bdafbd42d9f46b71559a542f73e4b181660

                  SHA256

                  0e14807fc2ba670a3186a95273350f7063727862a403e0e3c276da3bba6ce493

                  SHA512

                  7e160eb2b5b78d5a42eedea142f59a6b57b828797a1cfe52ac00a228aeca2f4a3112d08cb7250f5727e5789caab4e2faeaf456dbd4c30c5cea70fb98b7b4d93d

                • \Windows\SysWOW64\hfnapi.dll

                  Filesize

                  106KB

                  MD5

                  9788195bca4b551ba9b8e81e0f658c4c

                  SHA1

                  63ec9bdafbd42d9f46b71559a542f73e4b181660

                  SHA256

                  0e14807fc2ba670a3186a95273350f7063727862a403e0e3c276da3bba6ce493

                  SHA512

                  7e160eb2b5b78d5a42eedea142f59a6b57b828797a1cfe52ac00a228aeca2f4a3112d08cb7250f5727e5789caab4e2faeaf456dbd4c30c5cea70fb98b7b4d93d

                • \Windows\SysWOW64\hfpapi.dll

                  Filesize

                  241KB

                  MD5

                  833f296ef4ca68a687066c5aa4b4e0a0

                  SHA1

                  643c3f4b1c1c5afa6cf8c63c3cf13e556f5e555a

                  SHA256

                  501bcb337e1a2505738848a354b60ecdbf0d29e7c207f01c8366e3499de775ed

                  SHA512

                  f42152da8033952614b2590470d413241795c72075f1eed676bd248d7c7b8260bc91db9382e0d3127d6b0a16df021f2c7b7f2d16eec6e724db3f44b4c0389143

                • \Windows\SysWOW64\hfpapi.dll

                  Filesize

                  241KB

                  MD5

                  833f296ef4ca68a687066c5aa4b4e0a0

                  SHA1

                  643c3f4b1c1c5afa6cf8c63c3cf13e556f5e555a

                  SHA256

                  501bcb337e1a2505738848a354b60ecdbf0d29e7c207f01c8366e3499de775ed

                  SHA512

                  f42152da8033952614b2590470d413241795c72075f1eed676bd248d7c7b8260bc91db9382e0d3127d6b0a16df021f2c7b7f2d16eec6e724db3f44b4c0389143

                • \Windows\SysWOW64\installd.exe

                  Filesize

                  108KB

                  MD5

                  da81b9b6bdbfa959cf16b88e1e81fec8

                  SHA1

                  f4935d4e81e84e7fa7d049f30afad3fae63e01ba

                  SHA256

                  3d7f69b54ee9f07d4ce50701d2d6d9689380cabe767682aedaa2d1ad1b0877f6

                  SHA512

                  9ec1f7e5041236220658568a3ff0b8a35fff1537e8b1097e89adbe0d2ad751fe193112302c6e36d73795ce4862a3c469d02684f8d83eb71fd9edd321ae67ba97

                • \Windows\SysWOW64\nethtsrv.exe

                  Filesize

                  176KB

                  MD5

                  e361d5b779a0b682e3d03071a6a006dc

                  SHA1

                  e781be71c01d1995cabc12ab778b2e03a43ffbb9

                  SHA256

                  24f8fd6ba3bda766608cce8473a4b3f7018fba435da48439bd4a6c26b0d39b0f

                  SHA512

                  79fc570abef21639960a82dbc46e176e545f7e3cf11c749390b6cc751de7a8d08aa86d8d58950b419fd910d7be6a4289f60bf21ff8f80ef556cdfcab32cdee1c

                • \Windows\SysWOW64\netupdsrv.exe

                  Filesize

                  159KB

                  MD5

                  f723b534d59e22f8553e80ce09ebc767

                  SHA1

                  f423abb0eb71a9feb88c3447dd2e86f46bf80196

                  SHA256

                  34ebf710a9536061a3d683a63b9eaa430b33757101917f814ae33808784832a1

                  SHA512

                  bb829572f08bbd10e5c81af01f9c34f5fb8d4cdca316e5709eb89ecad9219f06d735ce596e12b16e7891976375605a26a767570cfbafc855057829fa563a62a9

                • memory/1392-54-0x0000000075601000-0x0000000075603000-memory.dmp

                  Filesize

                  8KB

                • memory/1392-59-0x0000000000360000-0x00000000007BE000-memory.dmp

                  Filesize

                  4.4MB

                • memory/1392-90-0x0000000000360000-0x00000000007BE000-memory.dmp

                  Filesize

                  4.4MB