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Analysis

  • max time kernel
    114s
  • max time network
    177s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/11/2022, 02:57

General

  • Target

    a3c66d1a88ba7b11066de292f0ebc4d7d735a4d680551ac0fe4078453676fb22.exe

  • Size

    832KB

  • MD5

    99693ab9be12f9f4943e152127389bb9

  • SHA1

    7b8e0680270f75e273ae2491a907d785cd3e635e

  • SHA256

    a3c66d1a88ba7b11066de292f0ebc4d7d735a4d680551ac0fe4078453676fb22

  • SHA512

    ecf88fb267bae0b221af7c37d0ac99d61c1c5eb3f366f4ed2b6106553892d8dd7534b1f3f08ccc3f01bfada49833e47a8847372ff53612af43663fbb4ae65670

  • SSDEEP

    24576:YrfGR2wDeRMTdWoWyATRFKkqyWo2qvwnzpik:YYYRMT0rRFQhqIzp

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\a3c66d1a88ba7b11066de292f0ebc4d7d735a4d680551ac0fe4078453676fb22.exe
    "C:\Users\Admin\AppData\Local\Temp\a3c66d1a88ba7b11066de292f0ebc4d7d735a4d680551ac0fe4078453676fb22.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:4848
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4248
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:3304
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4052
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1448
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1572
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:3580
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:3736
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:2592
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:4324
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1168
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:3312
          • 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:4648
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:2216

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\nsr63CD.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • C:\Users\Admin\AppData\Local\Temp\nsr63CD.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsr63CD.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsr63CD.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsr63CD.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsr63CD.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsr63CD.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsr63CD.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsr63CD.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            219594328af58738379280536bab7925

            SHA1

            c1ec874569456f03ef6c7b56557a3b9f03a29670

            SHA256

            0af00d9e6aa6d450c1fafd05e82b9cce9fb1460cb2d376a7d1ab13185f7c7697

            SHA512

            cf5e8f3a773a2d8b059532942cd98ef269471706dfa9917d92f9b385d87f9cfb4c7b15e4fe2fc37dc37c8ea52919a4b7b4488cb9d95df037d31a487792bcd768

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            219594328af58738379280536bab7925

            SHA1

            c1ec874569456f03ef6c7b56557a3b9f03a29670

            SHA256

            0af00d9e6aa6d450c1fafd05e82b9cce9fb1460cb2d376a7d1ab13185f7c7697

            SHA512

            cf5e8f3a773a2d8b059532942cd98ef269471706dfa9917d92f9b385d87f9cfb4c7b15e4fe2fc37dc37c8ea52919a4b7b4488cb9d95df037d31a487792bcd768

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            219594328af58738379280536bab7925

            SHA1

            c1ec874569456f03ef6c7b56557a3b9f03a29670

            SHA256

            0af00d9e6aa6d450c1fafd05e82b9cce9fb1460cb2d376a7d1ab13185f7c7697

            SHA512

            cf5e8f3a773a2d8b059532942cd98ef269471706dfa9917d92f9b385d87f9cfb4c7b15e4fe2fc37dc37c8ea52919a4b7b4488cb9d95df037d31a487792bcd768

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            219594328af58738379280536bab7925

            SHA1

            c1ec874569456f03ef6c7b56557a3b9f03a29670

            SHA256

            0af00d9e6aa6d450c1fafd05e82b9cce9fb1460cb2d376a7d1ab13185f7c7697

            SHA512

            cf5e8f3a773a2d8b059532942cd98ef269471706dfa9917d92f9b385d87f9cfb4c7b15e4fe2fc37dc37c8ea52919a4b7b4488cb9d95df037d31a487792bcd768

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            427KB

            MD5

            43c22058b994c58309fce8b20f0095ee

            SHA1

            ab272db97a03147bc9f18b69e48f0b88fa212f0d

            SHA256

            93fc8052c9a4e641b71884323364f7bf1ef55484628def72e9cdddba9a79bd59

            SHA512

            23929e5b0ef5c71cf910f5f891e37318f489b49f60d5234f1643c72f37e4dca1b715b3b76fea307bbb2294da2b46c78ec134638384a9fafd9b9f2d22a9c0790c

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            427KB

            MD5

            43c22058b994c58309fce8b20f0095ee

            SHA1

            ab272db97a03147bc9f18b69e48f0b88fa212f0d

            SHA256

            93fc8052c9a4e641b71884323364f7bf1ef55484628def72e9cdddba9a79bd59

            SHA512

            23929e5b0ef5c71cf910f5f891e37318f489b49f60d5234f1643c72f37e4dca1b715b3b76fea307bbb2294da2b46c78ec134638384a9fafd9b9f2d22a9c0790c

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            427KB

            MD5

            43c22058b994c58309fce8b20f0095ee

            SHA1

            ab272db97a03147bc9f18b69e48f0b88fa212f0d

            SHA256

            93fc8052c9a4e641b71884323364f7bf1ef55484628def72e9cdddba9a79bd59

            SHA512

            23929e5b0ef5c71cf910f5f891e37318f489b49f60d5234f1643c72f37e4dca1b715b3b76fea307bbb2294da2b46c78ec134638384a9fafd9b9f2d22a9c0790c

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            137KB

            MD5

            471641a6f8531d8737170a474e03e7d5

            SHA1

            5f4dec4620cf8a36732cacebb9897003af6c6f31

            SHA256

            d2e91504d3704168251f7639f57dc4a2261d5a93470cf9f1d1c0dd4f458321c5

            SHA512

            d456464d31179485a940a923855b47471e45fe69421e259f6048223cefc6b771ac377209f127c0dd2b68df11e34de4be9b7c56eaac0cd60de778d09c6c7b2e4b

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            137KB

            MD5

            471641a6f8531d8737170a474e03e7d5

            SHA1

            5f4dec4620cf8a36732cacebb9897003af6c6f31

            SHA256

            d2e91504d3704168251f7639f57dc4a2261d5a93470cf9f1d1c0dd4f458321c5

            SHA512

            d456464d31179485a940a923855b47471e45fe69421e259f6048223cefc6b771ac377209f127c0dd2b68df11e34de4be9b7c56eaac0cd60de778d09c6c7b2e4b

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            331KB

            MD5

            3ba85af56fbceadac16edb026ab2e90e

            SHA1

            be8a87c42a8aa2db48a5beee5c991b1f9efe22d4

            SHA256

            14ee3d9549fd64f7dbf1de9ab1c55e8001d5dc201cc734433165ac71f9e5b917

            SHA512

            b45b6e94085613f8383fcda45845cc567b754fa87bebfe6fe9fc7fde416d6e5b57df0a47adccc6b3abfdd26f110cd573ba84fd582fed6efeeb50b4392d98f514

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            331KB

            MD5

            3ba85af56fbceadac16edb026ab2e90e

            SHA1

            be8a87c42a8aa2db48a5beee5c991b1f9efe22d4

            SHA256

            14ee3d9549fd64f7dbf1de9ab1c55e8001d5dc201cc734433165ac71f9e5b917

            SHA512

            b45b6e94085613f8383fcda45845cc567b754fa87bebfe6fe9fc7fde416d6e5b57df0a47adccc6b3abfdd26f110cd573ba84fd582fed6efeeb50b4392d98f514

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            331KB

            MD5

            3ba85af56fbceadac16edb026ab2e90e

            SHA1

            be8a87c42a8aa2db48a5beee5c991b1f9efe22d4

            SHA256

            14ee3d9549fd64f7dbf1de9ab1c55e8001d5dc201cc734433165ac71f9e5b917

            SHA512

            b45b6e94085613f8383fcda45845cc567b754fa87bebfe6fe9fc7fde416d6e5b57df0a47adccc6b3abfdd26f110cd573ba84fd582fed6efeeb50b4392d98f514

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            186KB

            MD5

            2f824b9687e29c8ae4e11084ddf836f9

            SHA1

            1059faec6b861eb1c3840c3da7ffe1688664799f

            SHA256

            1f7f455443dd7c7ef2e2ef7c4dc32c8e62acb73040e9b0997fbd4fc091698302

            SHA512

            4b10bf162f726709db4ad8f18f6cc4544aa865f6f693d3deed7034ca6767a93ec0db626c002bf8c8b52f941578a6bf52061895bb03b65b68ce5cdaff54a6c3e7

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            186KB

            MD5

            2f824b9687e29c8ae4e11084ddf836f9

            SHA1

            1059faec6b861eb1c3840c3da7ffe1688664799f

            SHA256

            1f7f455443dd7c7ef2e2ef7c4dc32c8e62acb73040e9b0997fbd4fc091698302

            SHA512

            4b10bf162f726709db4ad8f18f6cc4544aa865f6f693d3deed7034ca6767a93ec0db626c002bf8c8b52f941578a6bf52061895bb03b65b68ce5cdaff54a6c3e7

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            186KB

            MD5

            2f824b9687e29c8ae4e11084ddf836f9

            SHA1

            1059faec6b861eb1c3840c3da7ffe1688664799f

            SHA256

            1f7f455443dd7c7ef2e2ef7c4dc32c8e62acb73040e9b0997fbd4fc091698302

            SHA512

            4b10bf162f726709db4ad8f18f6cc4544aa865f6f693d3deed7034ca6767a93ec0db626c002bf8c8b52f941578a6bf52061895bb03b65b68ce5cdaff54a6c3e7

          • memory/4848-132-0x0000000000320000-0x00000000007BE000-memory.dmp

            Filesize

            4.6MB

          • memory/4848-141-0x0000000000320000-0x00000000007BE000-memory.dmp

            Filesize

            4.6MB

          • memory/4848-169-0x0000000000320000-0x00000000007BE000-memory.dmp

            Filesize

            4.6MB