Analysis

  • max time kernel
    45s
  • max time network
    50s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:14

General

  • Target

    b7d3446b70b96fae8af9bc9361d7dfa1a8f74a1c97c543490c0582acb39c19d0.exe

  • Size

    602KB

  • MD5

    51f84579131b8e4ad908d2877a307f4c

  • SHA1

    a0d1d7fbc9a898cf8707c07b7872a0f8a8219d36

  • SHA256

    b7d3446b70b96fae8af9bc9361d7dfa1a8f74a1c97c543490c0582acb39c19d0

  • SHA512

    1549af799b4f459ccab5f87d6e26f0b3b08494f40dbb48c0e60def7d4bcc501a36a143c5b3b4b3d9b0117ffab554212b372e7110b28feab21ef1ac43744b9eef

  • SSDEEP

    12288:nIny5DYTkIWaHuaz3dMynYJ3x8hSE9KXzm6cfeNXYSoQNPAz+:vUTkNaH5NMvzAuzmZvz+

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\b7d3446b70b96fae8af9bc9361d7dfa1a8f74a1c97c543490c0582acb39c19d0.exe
    "C:\Users\Admin\AppData\Local\Temp\b7d3446b70b96fae8af9bc9361d7dfa1a8f74a1c97c543490c0582acb39c19d0.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:1448
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1120
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1932
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:568
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1316
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:324
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1800
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1544
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1344
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1320
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1040
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1812
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1968
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1284

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            1d007a647663733dffd2ef2a0cb6af06

            SHA1

            8bfc23908dfeb95b3050f745ab86138712eda795

            SHA256

            9c520e7443b1ae6021032364d8cedda221fb3fc31dfd8ad2a31d5badd8994e4f

            SHA512

            3289196baa7bef33668b13b2e6987cf5db115cb322a651beab86b2a1167f8e337fcc732a05e0da08a97af4b582ea980655ea4093d1bf9313760154e85190596a

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            dedabbc8a543a465385000824a8ef87e

            SHA1

            e8659221be62d5cf9357933453aeda28e4bda9ce

            SHA256

            c8828d02c9024e1db61cf6f5a658c53ea9e52bbd71b1721932214547053243eb

            SHA512

            18587c09351caed31b0b89f9da1dd6e7def4ac6ab88a2169bc3ac6f69bc185ab17e45a3b50d3f47b0a4496c280423645d66bc7b8e1ec14394f302bdd3ea26ebd

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            9671951506128952abf8d7a8e5d7d925

            SHA1

            af984da9b4fcb0c5fde4f95a93882ceddd3faaa2

            SHA256

            545473b748661a092bd6a009f584a3f4b621b3647c4a6b1495df9a316c2dbea6

            SHA512

            e4dc4b7206646da5af23561d2abdc28600d0dcf44512b55dfb2a6e85802688ca37d9472020ee0fbf34c1a21af102e8badae47a04afb06f73fe94acd0909f867c

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1d64797fe8b04a0a802c3b7050c3dbd1

            SHA1

            a922231bca194cc4abcf3aa3d396365fabca48cf

            SHA256

            cba8c34b090558bb8b5352ef904ab00a6406273a16837c1e1980f8b755ad8e2e

            SHA512

            91314f86eb5fdc322b2fab3916ccb9a7cc60a62233dbde486631385e4ca492cbc9f0352b27285bbe1096798c258da981282fe2fceba173e886d08c0da9c277fe

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1d64797fe8b04a0a802c3b7050c3dbd1

            SHA1

            a922231bca194cc4abcf3aa3d396365fabca48cf

            SHA256

            cba8c34b090558bb8b5352ef904ab00a6406273a16837c1e1980f8b755ad8e2e

            SHA512

            91314f86eb5fdc322b2fab3916ccb9a7cc60a62233dbde486631385e4ca492cbc9f0352b27285bbe1096798c258da981282fe2fceba173e886d08c0da9c277fe

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            c7847e0306e5ca389a20f4671515ec4f

            SHA1

            0997460f6b7b763cfec1fef16045594cd3302ba2

            SHA256

            04fccc3a7fb22130e83a6c4d13236546db07138ca0602b98a6ff5dc680f94122

            SHA512

            73fbaecf5bf747e0cb24bb609f5d60b42b2148106c3a342ba43ef37d8b6caae24c19eed94f27df0127919aecfda3e340c7b8cec269172127af32437d7d36b2a2

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            c7847e0306e5ca389a20f4671515ec4f

            SHA1

            0997460f6b7b763cfec1fef16045594cd3302ba2

            SHA256

            04fccc3a7fb22130e83a6c4d13236546db07138ca0602b98a6ff5dc680f94122

            SHA512

            73fbaecf5bf747e0cb24bb609f5d60b42b2148106c3a342ba43ef37d8b6caae24c19eed94f27df0127919aecfda3e340c7b8cec269172127af32437d7d36b2a2

          • \Users\Admin\AppData\Local\Temp\nso20EC.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nso20EC.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso20EC.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso20EC.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso20EC.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            1d007a647663733dffd2ef2a0cb6af06

            SHA1

            8bfc23908dfeb95b3050f745ab86138712eda795

            SHA256

            9c520e7443b1ae6021032364d8cedda221fb3fc31dfd8ad2a31d5badd8994e4f

            SHA512

            3289196baa7bef33668b13b2e6987cf5db115cb322a651beab86b2a1167f8e337fcc732a05e0da08a97af4b582ea980655ea4093d1bf9313760154e85190596a

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            1d007a647663733dffd2ef2a0cb6af06

            SHA1

            8bfc23908dfeb95b3050f745ab86138712eda795

            SHA256

            9c520e7443b1ae6021032364d8cedda221fb3fc31dfd8ad2a31d5badd8994e4f

            SHA512

            3289196baa7bef33668b13b2e6987cf5db115cb322a651beab86b2a1167f8e337fcc732a05e0da08a97af4b582ea980655ea4093d1bf9313760154e85190596a

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            1d007a647663733dffd2ef2a0cb6af06

            SHA1

            8bfc23908dfeb95b3050f745ab86138712eda795

            SHA256

            9c520e7443b1ae6021032364d8cedda221fb3fc31dfd8ad2a31d5badd8994e4f

            SHA512

            3289196baa7bef33668b13b2e6987cf5db115cb322a651beab86b2a1167f8e337fcc732a05e0da08a97af4b582ea980655ea4093d1bf9313760154e85190596a

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            dedabbc8a543a465385000824a8ef87e

            SHA1

            e8659221be62d5cf9357933453aeda28e4bda9ce

            SHA256

            c8828d02c9024e1db61cf6f5a658c53ea9e52bbd71b1721932214547053243eb

            SHA512

            18587c09351caed31b0b89f9da1dd6e7def4ac6ab88a2169bc3ac6f69bc185ab17e45a3b50d3f47b0a4496c280423645d66bc7b8e1ec14394f302bdd3ea26ebd

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            dedabbc8a543a465385000824a8ef87e

            SHA1

            e8659221be62d5cf9357933453aeda28e4bda9ce

            SHA256

            c8828d02c9024e1db61cf6f5a658c53ea9e52bbd71b1721932214547053243eb

            SHA512

            18587c09351caed31b0b89f9da1dd6e7def4ac6ab88a2169bc3ac6f69bc185ab17e45a3b50d3f47b0a4496c280423645d66bc7b8e1ec14394f302bdd3ea26ebd

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            9671951506128952abf8d7a8e5d7d925

            SHA1

            af984da9b4fcb0c5fde4f95a93882ceddd3faaa2

            SHA256

            545473b748661a092bd6a009f584a3f4b621b3647c4a6b1495df9a316c2dbea6

            SHA512

            e4dc4b7206646da5af23561d2abdc28600d0dcf44512b55dfb2a6e85802688ca37d9472020ee0fbf34c1a21af102e8badae47a04afb06f73fe94acd0909f867c

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1d64797fe8b04a0a802c3b7050c3dbd1

            SHA1

            a922231bca194cc4abcf3aa3d396365fabca48cf

            SHA256

            cba8c34b090558bb8b5352ef904ab00a6406273a16837c1e1980f8b755ad8e2e

            SHA512

            91314f86eb5fdc322b2fab3916ccb9a7cc60a62233dbde486631385e4ca492cbc9f0352b27285bbe1096798c258da981282fe2fceba173e886d08c0da9c277fe

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            c7847e0306e5ca389a20f4671515ec4f

            SHA1

            0997460f6b7b763cfec1fef16045594cd3302ba2

            SHA256

            04fccc3a7fb22130e83a6c4d13236546db07138ca0602b98a6ff5dc680f94122

            SHA512

            73fbaecf5bf747e0cb24bb609f5d60b42b2148106c3a342ba43ef37d8b6caae24c19eed94f27df0127919aecfda3e340c7b8cec269172127af32437d7d36b2a2

          • memory/324-64-0x0000000000000000-mapping.dmp

          • memory/568-61-0x0000000000000000-mapping.dmp

          • memory/1040-86-0x0000000000000000-mapping.dmp

          • memory/1120-57-0x0000000000000000-mapping.dmp

          • memory/1316-62-0x0000000000000000-mapping.dmp

          • memory/1320-81-0x0000000000000000-mapping.dmp

          • memory/1344-80-0x0000000000000000-mapping.dmp

          • memory/1448-54-0x00000000758B1000-0x00000000758B3000-memory.dmp

            Filesize

            8KB

          • memory/1448-59-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1448-90-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1544-76-0x0000000000000000-mapping.dmp

          • memory/1800-70-0x0000000000000000-mapping.dmp

          • memory/1812-87-0x0000000000000000-mapping.dmp

          • memory/1932-58-0x0000000000000000-mapping.dmp