Analysis

  • max time kernel
    35s
  • max time network
    39s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:22

General

  • Target

    75c8168b00fbe9370c4ef6cf19164e4759ab32c1f82da499ca2065bbae0dc8d3.exe

  • Size

    603KB

  • MD5

    85c27f025ee5f30c5136ad72745c9ccb

  • SHA1

    c38ad461714aeb4c0abf617922e7ee08aaca5921

  • SHA256

    75c8168b00fbe9370c4ef6cf19164e4759ab32c1f82da499ca2065bbae0dc8d3

  • SHA512

    fe58d658bfba709474b472d75b3ee5b2696fcbd94c9b9493fcdb6ccedb9505aeca0dc706fd55b1e8262316ad52f68ee1e8b888ae37194b957f795780271f5a56

  • SSDEEP

    12288:aIny5DYTMINQGP9do/DI9yIBb8XBvqLmS8+:8UTMeQG1dcs9ye8XBvqLbd

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\75c8168b00fbe9370c4ef6cf19164e4759ab32c1f82da499ca2065bbae0dc8d3.exe
    "C:\Users\Admin\AppData\Local\Temp\75c8168b00fbe9370c4ef6cf19164e4759ab32c1f82da499ca2065bbae0dc8d3.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:836
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2040
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1576
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:732
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1508
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1544
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1220
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:948
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1084
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1072
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1176
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1124
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1940
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1108

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            4f312d79a9bd3ff2af582cc56b68e197

            SHA1

            063915dba6ee833a87a9e3148949d7397d9ec259

            SHA256

            b98a89d71ef9ef928862c288dece356ce62d5ac0c42589aa7f98f70274614531

            SHA512

            270e56d3fe782563a322b95f44192b86b810814fbcf753cd88ec670990ffe3ce068ded9c201bac21eb2f893450adca8c9c5175e11bcda87efcad1691dcd69921

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            7ed4b4e759647f0322166b4a00e249cf

            SHA1

            ad91d54f548a2fcd89d57994152b30d4056cae1d

            SHA256

            285169fdc67b6c373129ddf8119b62affa69bd8e132ff71a25238b2d49c27355

            SHA512

            c0c9c0d8cc949713fd612f3ed50b968ceb24d379b1a08bf798663384faa1b377b64e3e6d69856ff8a292846032490dbcb2fa82fdd470c330e7d661636b2b7bb1

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            c7bcfb58bd92ad75ef48a80be137e282

            SHA1

            a40d010ebb7861a68aa969f9da1161d7a1476e5c

            SHA256

            ff0a5121e215af6f8473aa2c2535b7e34267f2e0a910b81d1e67759875e1a114

            SHA512

            010e059992ab14909322be769c59ef91e7cbd7f81fd4ab824664a7175fc55fd080ac401c56c26b9411c24c8c306423bddaff462db38dd027d299918fbcb8b4c5

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            bbcf79d3ec313fc97c757fa74bbb08a7

            SHA1

            288d470f5e0c20a2347332051acc92437bbfb683

            SHA256

            b3078ca59e7f931501e73b5727775eaf876ee8bfe86e81c4e12a633351a78c47

            SHA512

            e881a126bb1d3590bcecd3e1bd598a0545e5fa16b009b8b5e179166a73ab36649f5666faee4c70e5e75bf9995dcf65d2ba30f811ef8216b7baec9e47bc787120

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            bbcf79d3ec313fc97c757fa74bbb08a7

            SHA1

            288d470f5e0c20a2347332051acc92437bbfb683

            SHA256

            b3078ca59e7f931501e73b5727775eaf876ee8bfe86e81c4e12a633351a78c47

            SHA512

            e881a126bb1d3590bcecd3e1bd598a0545e5fa16b009b8b5e179166a73ab36649f5666faee4c70e5e75bf9995dcf65d2ba30f811ef8216b7baec9e47bc787120

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            0ea341e2df48d2184f3adf72c065cc88

            SHA1

            43236da751faf571ae69f0511b0fcfd1831202a1

            SHA256

            6f2637f14b2ed7ccc07ba3ea7f1055d88328d478e31983ae6c9fb7ac4e057f49

            SHA512

            1e7272e049906d321b1c40fe8a7d7f945ba16c540c73195e2ec8302a9febe4e6811b45796290ac7fcb24b648231d06d03a1b821520ed50380e8bb6a5d33bc370

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            0ea341e2df48d2184f3adf72c065cc88

            SHA1

            43236da751faf571ae69f0511b0fcfd1831202a1

            SHA256

            6f2637f14b2ed7ccc07ba3ea7f1055d88328d478e31983ae6c9fb7ac4e057f49

            SHA512

            1e7272e049906d321b1c40fe8a7d7f945ba16c540c73195e2ec8302a9febe4e6811b45796290ac7fcb24b648231d06d03a1b821520ed50380e8bb6a5d33bc370

          • \Users\Admin\AppData\Local\Temp\nst3B8D.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nst3B8D.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst3B8D.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst3B8D.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst3B8D.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            4f312d79a9bd3ff2af582cc56b68e197

            SHA1

            063915dba6ee833a87a9e3148949d7397d9ec259

            SHA256

            b98a89d71ef9ef928862c288dece356ce62d5ac0c42589aa7f98f70274614531

            SHA512

            270e56d3fe782563a322b95f44192b86b810814fbcf753cd88ec670990ffe3ce068ded9c201bac21eb2f893450adca8c9c5175e11bcda87efcad1691dcd69921

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            4f312d79a9bd3ff2af582cc56b68e197

            SHA1

            063915dba6ee833a87a9e3148949d7397d9ec259

            SHA256

            b98a89d71ef9ef928862c288dece356ce62d5ac0c42589aa7f98f70274614531

            SHA512

            270e56d3fe782563a322b95f44192b86b810814fbcf753cd88ec670990ffe3ce068ded9c201bac21eb2f893450adca8c9c5175e11bcda87efcad1691dcd69921

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            4f312d79a9bd3ff2af582cc56b68e197

            SHA1

            063915dba6ee833a87a9e3148949d7397d9ec259

            SHA256

            b98a89d71ef9ef928862c288dece356ce62d5ac0c42589aa7f98f70274614531

            SHA512

            270e56d3fe782563a322b95f44192b86b810814fbcf753cd88ec670990ffe3ce068ded9c201bac21eb2f893450adca8c9c5175e11bcda87efcad1691dcd69921

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            7ed4b4e759647f0322166b4a00e249cf

            SHA1

            ad91d54f548a2fcd89d57994152b30d4056cae1d

            SHA256

            285169fdc67b6c373129ddf8119b62affa69bd8e132ff71a25238b2d49c27355

            SHA512

            c0c9c0d8cc949713fd612f3ed50b968ceb24d379b1a08bf798663384faa1b377b64e3e6d69856ff8a292846032490dbcb2fa82fdd470c330e7d661636b2b7bb1

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            7ed4b4e759647f0322166b4a00e249cf

            SHA1

            ad91d54f548a2fcd89d57994152b30d4056cae1d

            SHA256

            285169fdc67b6c373129ddf8119b62affa69bd8e132ff71a25238b2d49c27355

            SHA512

            c0c9c0d8cc949713fd612f3ed50b968ceb24d379b1a08bf798663384faa1b377b64e3e6d69856ff8a292846032490dbcb2fa82fdd470c330e7d661636b2b7bb1

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            c7bcfb58bd92ad75ef48a80be137e282

            SHA1

            a40d010ebb7861a68aa969f9da1161d7a1476e5c

            SHA256

            ff0a5121e215af6f8473aa2c2535b7e34267f2e0a910b81d1e67759875e1a114

            SHA512

            010e059992ab14909322be769c59ef91e7cbd7f81fd4ab824664a7175fc55fd080ac401c56c26b9411c24c8c306423bddaff462db38dd027d299918fbcb8b4c5

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            bbcf79d3ec313fc97c757fa74bbb08a7

            SHA1

            288d470f5e0c20a2347332051acc92437bbfb683

            SHA256

            b3078ca59e7f931501e73b5727775eaf876ee8bfe86e81c4e12a633351a78c47

            SHA512

            e881a126bb1d3590bcecd3e1bd598a0545e5fa16b009b8b5e179166a73ab36649f5666faee4c70e5e75bf9995dcf65d2ba30f811ef8216b7baec9e47bc787120

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            0ea341e2df48d2184f3adf72c065cc88

            SHA1

            43236da751faf571ae69f0511b0fcfd1831202a1

            SHA256

            6f2637f14b2ed7ccc07ba3ea7f1055d88328d478e31983ae6c9fb7ac4e057f49

            SHA512

            1e7272e049906d321b1c40fe8a7d7f945ba16c540c73195e2ec8302a9febe4e6811b45796290ac7fcb24b648231d06d03a1b821520ed50380e8bb6a5d33bc370

          • memory/732-61-0x0000000000000000-mapping.dmp

          • memory/836-54-0x0000000075AD1000-0x0000000075AD3000-memory.dmp

            Filesize

            8KB

          • memory/836-90-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/836-55-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/948-76-0x0000000000000000-mapping.dmp

          • memory/1072-81-0x0000000000000000-mapping.dmp

          • memory/1084-80-0x0000000000000000-mapping.dmp

          • memory/1124-87-0x0000000000000000-mapping.dmp

          • memory/1176-86-0x0000000000000000-mapping.dmp

          • memory/1220-70-0x0000000000000000-mapping.dmp

          • memory/1508-62-0x0000000000000000-mapping.dmp

          • memory/1544-64-0x0000000000000000-mapping.dmp

          • memory/1576-59-0x0000000000000000-mapping.dmp

          • memory/2040-58-0x0000000000000000-mapping.dmp