Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-11-2022 06:01

General

  • Target

    b81c1823257a01fe4f6d3b624d8b2cabff9fa1863fa8bfdad8b366222a7343c7.exe

  • Size

    695KB

  • MD5

    b055a730f4742c3795d262e7a67041e5

  • SHA1

    3b59bbcdd7c2190c38fa4fd808e007b7202bb7e3

  • SHA256

    b81c1823257a01fe4f6d3b624d8b2cabff9fa1863fa8bfdad8b366222a7343c7

  • SHA512

    aac1fa0ca5ac6dde17ed3fa9470a7329bba933b7065bc2f7f37db1c5635e4d492567b47494bb76af84176f3249b3d4cf0d0f6560e474df0c93390ad5640afdd1

  • SSDEEP

    12288:wAbu3fQ+thk6EzmbfRQr4kOH/c4j6JTdzW1piIYy7lEsjlSL:wAbuPPEzqfZkI/UzW1piIYyROL

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\b81c1823257a01fe4f6d3b624d8b2cabff9fa1863fa8bfdad8b366222a7343c7.exe
    "C:\Users\Admin\AppData\Local\Temp\b81c1823257a01fe4f6d3b624d8b2cabff9fa1863fa8bfdad8b366222a7343c7.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:4824
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3408
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1176
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1996
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1144
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:2188
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:4916
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:2764
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:224
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:3480
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:3892
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:3652
          • 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:3824
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1348

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\nsv7575.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • C:\Users\Admin\AppData\Local\Temp\nsv7575.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsv7575.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsv7575.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsv7575.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsv7575.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsv7575.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsv7575.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsv7575.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            78a19429f50d69c099ca0be63d61437b

            SHA1

            39cc30b7ad1236eba802e0ac5299a1fa238e025a

            SHA256

            f341f6bedf2b4cfdaea3ca5b37793f2c8c57e3dbbfa8379f3ee2f1576cb08580

            SHA512

            86bb8ca595ec1adefd4461e5f70523547671469227b2ce458c1776931db9226c3f30e4f81ef669bc086be3b97117f5d153b168c2f62a793fcc0ea7ba6b3a8841

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            78a19429f50d69c099ca0be63d61437b

            SHA1

            39cc30b7ad1236eba802e0ac5299a1fa238e025a

            SHA256

            f341f6bedf2b4cfdaea3ca5b37793f2c8c57e3dbbfa8379f3ee2f1576cb08580

            SHA512

            86bb8ca595ec1adefd4461e5f70523547671469227b2ce458c1776931db9226c3f30e4f81ef669bc086be3b97117f5d153b168c2f62a793fcc0ea7ba6b3a8841

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            78a19429f50d69c099ca0be63d61437b

            SHA1

            39cc30b7ad1236eba802e0ac5299a1fa238e025a

            SHA256

            f341f6bedf2b4cfdaea3ca5b37793f2c8c57e3dbbfa8379f3ee2f1576cb08580

            SHA512

            86bb8ca595ec1adefd4461e5f70523547671469227b2ce458c1776931db9226c3f30e4f81ef669bc086be3b97117f5d153b168c2f62a793fcc0ea7ba6b3a8841

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            78a19429f50d69c099ca0be63d61437b

            SHA1

            39cc30b7ad1236eba802e0ac5299a1fa238e025a

            SHA256

            f341f6bedf2b4cfdaea3ca5b37793f2c8c57e3dbbfa8379f3ee2f1576cb08580

            SHA512

            86bb8ca595ec1adefd4461e5f70523547671469227b2ce458c1776931db9226c3f30e4f81ef669bc086be3b97117f5d153b168c2f62a793fcc0ea7ba6b3a8841

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            a216ae809c0c9c9282235fdc19f9b00a

            SHA1

            ddb22bdcb25a38779ac55fc57d38019b6736b767

            SHA256

            40ce37ff2355c1576b95f97f6d7307f748f3129bc1eeea5439c732c605589745

            SHA512

            dbeaf5b0619bf3bb4b615246974fdea77ab4dfa4d6643020c23d2cdf95b3ddd11b6aa4b57e6611e7a7d2ecbea74a6b9a921c8fa89e9e94ac82114d6bcc51b6fa

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            a216ae809c0c9c9282235fdc19f9b00a

            SHA1

            ddb22bdcb25a38779ac55fc57d38019b6736b767

            SHA256

            40ce37ff2355c1576b95f97f6d7307f748f3129bc1eeea5439c732c605589745

            SHA512

            dbeaf5b0619bf3bb4b615246974fdea77ab4dfa4d6643020c23d2cdf95b3ddd11b6aa4b57e6611e7a7d2ecbea74a6b9a921c8fa89e9e94ac82114d6bcc51b6fa

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            a216ae809c0c9c9282235fdc19f9b00a

            SHA1

            ddb22bdcb25a38779ac55fc57d38019b6736b767

            SHA256

            40ce37ff2355c1576b95f97f6d7307f748f3129bc1eeea5439c732c605589745

            SHA512

            dbeaf5b0619bf3bb4b615246974fdea77ab4dfa4d6643020c23d2cdf95b3ddd11b6aa4b57e6611e7a7d2ecbea74a6b9a921c8fa89e9e94ac82114d6bcc51b6fa

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            8664ade3b8102d54532544f53408d2dc

            SHA1

            ea86ea9f7404ed6a2d9ab37e7385d637cc9ad1fe

            SHA256

            5c0581f64a495e608b1c9060eae8df874e2b850a17fe127c1fc4d06b6d9242ff

            SHA512

            bf836cb04ebb4e96ea50759faebb9fb2b77a75b1f5901fb7ec05b98a673cf598fac43131bf7f1e542f240993ab55191f86c9707f0bcdffefbc37cff30c0ba0d4

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            8664ade3b8102d54532544f53408d2dc

            SHA1

            ea86ea9f7404ed6a2d9ab37e7385d637cc9ad1fe

            SHA256

            5c0581f64a495e608b1c9060eae8df874e2b850a17fe127c1fc4d06b6d9242ff

            SHA512

            bf836cb04ebb4e96ea50759faebb9fb2b77a75b1f5901fb7ec05b98a673cf598fac43131bf7f1e542f240993ab55191f86c9707f0bcdffefbc37cff30c0ba0d4

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            79ef07990ca6f9640111358c9d993793

            SHA1

            45299e6b8a2048eccc298fe93502d27b5964d0f0

            SHA256

            279defa6182f468b8d3c5a215515ece44cbcb711879b94047fbd167fb48f1dd2

            SHA512

            fa652c8fa86976dc88ad047ce34b7e567c7c6bb5cf8fc34134bf977946c971626e956203b8ce5e6ad390e19695d0efc4a447a1ec148c7699d4c60f33174c73ae

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            79ef07990ca6f9640111358c9d993793

            SHA1

            45299e6b8a2048eccc298fe93502d27b5964d0f0

            SHA256

            279defa6182f468b8d3c5a215515ece44cbcb711879b94047fbd167fb48f1dd2

            SHA512

            fa652c8fa86976dc88ad047ce34b7e567c7c6bb5cf8fc34134bf977946c971626e956203b8ce5e6ad390e19695d0efc4a447a1ec148c7699d4c60f33174c73ae

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            79ef07990ca6f9640111358c9d993793

            SHA1

            45299e6b8a2048eccc298fe93502d27b5964d0f0

            SHA256

            279defa6182f468b8d3c5a215515ece44cbcb711879b94047fbd167fb48f1dd2

            SHA512

            fa652c8fa86976dc88ad047ce34b7e567c7c6bb5cf8fc34134bf977946c971626e956203b8ce5e6ad390e19695d0efc4a447a1ec148c7699d4c60f33174c73ae

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            3f8cb1e7f15e87605f7d58d3472a6ca2

            SHA1

            a24779880eeb7df23eb16b3d9862db377b42ea11

            SHA256

            6c971698084df0c565f8f3e9bc240d86f03c7b4ff9d6f93606e93b55c8375283

            SHA512

            577f916edde56ce20b92f2fa286812d2251962a538e39f8ee00037a23b4822efc58f3fef523e585eea9f8c8b21ac8a399073f0ef8bacc87ccde953aea30c3528

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            3f8cb1e7f15e87605f7d58d3472a6ca2

            SHA1

            a24779880eeb7df23eb16b3d9862db377b42ea11

            SHA256

            6c971698084df0c565f8f3e9bc240d86f03c7b4ff9d6f93606e93b55c8375283

            SHA512

            577f916edde56ce20b92f2fa286812d2251962a538e39f8ee00037a23b4822efc58f3fef523e585eea9f8c8b21ac8a399073f0ef8bacc87ccde953aea30c3528

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            3f8cb1e7f15e87605f7d58d3472a6ca2

            SHA1

            a24779880eeb7df23eb16b3d9862db377b42ea11

            SHA256

            6c971698084df0c565f8f3e9bc240d86f03c7b4ff9d6f93606e93b55c8375283

            SHA512

            577f916edde56ce20b92f2fa286812d2251962a538e39f8ee00037a23b4822efc58f3fef523e585eea9f8c8b21ac8a399073f0ef8bacc87ccde953aea30c3528

          • memory/224-158-0x0000000000000000-mapping.dmp

          • memory/1144-141-0x0000000000000000-mapping.dmp

          • memory/1176-137-0x0000000000000000-mapping.dmp

          • memory/1996-140-0x0000000000000000-mapping.dmp

          • memory/2188-142-0x0000000000000000-mapping.dmp

          • memory/2764-153-0x0000000000000000-mapping.dmp

          • memory/3408-136-0x0000000000000000-mapping.dmp

          • memory/3480-159-0x0000000000000000-mapping.dmp

          • memory/3652-166-0x0000000000000000-mapping.dmp

          • memory/3892-165-0x0000000000000000-mapping.dmp

          • memory/4824-132-0x0000000000340000-0x00000000007BE000-memory.dmp

            Filesize

            4.5MB

          • memory/4824-168-0x0000000000340000-0x00000000007BE000-memory.dmp

            Filesize

            4.5MB

          • memory/4916-147-0x0000000000000000-mapping.dmp