Analysis

  • max time kernel
    84s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:14

General

  • Target

    b5f458fceecf827b21e0dfb2b8a66c40afa97081c1aefde05fe8e77bc3dbc36e.exe

  • Size

    602KB

  • MD5

    97791f947b6ce1a0ccd6a9883e84ffca

  • SHA1

    536e3c82e2fe65169cb4cd099ac46c6c031fe534

  • SHA256

    b5f458fceecf827b21e0dfb2b8a66c40afa97081c1aefde05fe8e77bc3dbc36e

  • SHA512

    bebb0ede4a886e6f11a427e2e6b3915162fbc673f1af225850d62e50f82df568e10f8f804be3ede6ebbebe0786050af034c5708d2d61aafa0123e801b057c305

  • SSDEEP

    12288:6Iny5DYTgIEJdcblH0/4f5AdTabnC5o8rDClL/ixMJSv36:cUTgzJw6c5rnYfK/ixMJQ36

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\b5f458fceecf827b21e0dfb2b8a66c40afa97081c1aefde05fe8e77bc3dbc36e.exe
    "C:\Users\Admin\AppData\Local\Temp\b5f458fceecf827b21e0dfb2b8a66c40afa97081c1aefde05fe8e77bc3dbc36e.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:1632
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:996
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:524
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:656
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:944
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1440
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:592
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1984
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1840
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:2020
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1372
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1776
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1280
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:804

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            03cb6dcf2d204054a91d8f8cc8245701

            SHA1

            154614541f02718e8fdd921050093c5615019551

            SHA256

            f1988b6af9a3484c7300a391790780d9555337e435b4bd72e512c7e62bb02181

            SHA512

            54f2b1364bbc6a9f612ced390cf28b1c8bc28ab79d385a69c3f099e7ec7cc1d5480515abb9dcbe38f177d0a54953cacb6ae5884474da3556b4936dc2cc9e1f70

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            a05ed0eb6ea24ef05584602f43ea8bb9

            SHA1

            fe9d6f506d9356af67ef8162b5e93c8ee8a00f58

            SHA256

            1346c5d51b717b9439149a39d8ebc39e99980f8b5785f225fcc12ecdd45fabeb

            SHA512

            16284492085dd4ba876d44bf348b174f99979b99df59452b943f98b14ffac7215e31bd0ec3302f52cf8ca34e652477eaeeba845dd2fd861ea0a266b498d97401

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            8d7ddc3ef5c514a11171df2e9da36ee8

            SHA1

            35338c6790baaa13e20c125f869f305384e1bffc

            SHA256

            cff7f5fbeb29a161f6baa00daa54b251b4936dfb1f4af0b046221ac9d05c917c

            SHA512

            49449429f00ecd3c3937cfddaedbb790301a73cb2f5d5477ea07e4c722d8af5a7053a3909a213f582862895cd3f32ee2dd1664da1f7cc1bf9ea3937ec667af1a

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            ff20e643a56f70747d011f4dd6a1bd5d

            SHA1

            fc1ded5e2a98d424a495bb8f79df26e6769e1583

            SHA256

            e3f1dccef7fc3d13dd61563c2e56f16f91d35c2ddce401e8056337f190873e85

            SHA512

            624b590920b2d6baa083cb997744a0bd871970d8e285e86a6a5569edf914e9fc667099d1e6265804c599a6787aa075a16934ba3f92b5384f17a7805843c7e104

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            ff20e643a56f70747d011f4dd6a1bd5d

            SHA1

            fc1ded5e2a98d424a495bb8f79df26e6769e1583

            SHA256

            e3f1dccef7fc3d13dd61563c2e56f16f91d35c2ddce401e8056337f190873e85

            SHA512

            624b590920b2d6baa083cb997744a0bd871970d8e285e86a6a5569edf914e9fc667099d1e6265804c599a6787aa075a16934ba3f92b5384f17a7805843c7e104

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            d4b171846d2f435baffeb94fd0f6077e

            SHA1

            4cd920954351156430ea4d5a4a22749a0567d6ce

            SHA256

            8c26af5da04981d6070e2904086eeaef869f5a5724199f78278dadaa66591c92

            SHA512

            e661874e30fc6b969e8d9e20ffc458556f5c05c8eb4a5f75263df2b9dc409f85a84f6d8613054efc82d666a3c5e7a030bf8d8a90200bea376c799493ac782544

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            d4b171846d2f435baffeb94fd0f6077e

            SHA1

            4cd920954351156430ea4d5a4a22749a0567d6ce

            SHA256

            8c26af5da04981d6070e2904086eeaef869f5a5724199f78278dadaa66591c92

            SHA512

            e661874e30fc6b969e8d9e20ffc458556f5c05c8eb4a5f75263df2b9dc409f85a84f6d8613054efc82d666a3c5e7a030bf8d8a90200bea376c799493ac782544

          • \Users\Admin\AppData\Local\Temp\nsy7DCA.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsy7DCA.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy7DCA.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy7DCA.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy7DCA.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            03cb6dcf2d204054a91d8f8cc8245701

            SHA1

            154614541f02718e8fdd921050093c5615019551

            SHA256

            f1988b6af9a3484c7300a391790780d9555337e435b4bd72e512c7e62bb02181

            SHA512

            54f2b1364bbc6a9f612ced390cf28b1c8bc28ab79d385a69c3f099e7ec7cc1d5480515abb9dcbe38f177d0a54953cacb6ae5884474da3556b4936dc2cc9e1f70

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            03cb6dcf2d204054a91d8f8cc8245701

            SHA1

            154614541f02718e8fdd921050093c5615019551

            SHA256

            f1988b6af9a3484c7300a391790780d9555337e435b4bd72e512c7e62bb02181

            SHA512

            54f2b1364bbc6a9f612ced390cf28b1c8bc28ab79d385a69c3f099e7ec7cc1d5480515abb9dcbe38f177d0a54953cacb6ae5884474da3556b4936dc2cc9e1f70

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            03cb6dcf2d204054a91d8f8cc8245701

            SHA1

            154614541f02718e8fdd921050093c5615019551

            SHA256

            f1988b6af9a3484c7300a391790780d9555337e435b4bd72e512c7e62bb02181

            SHA512

            54f2b1364bbc6a9f612ced390cf28b1c8bc28ab79d385a69c3f099e7ec7cc1d5480515abb9dcbe38f177d0a54953cacb6ae5884474da3556b4936dc2cc9e1f70

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            a05ed0eb6ea24ef05584602f43ea8bb9

            SHA1

            fe9d6f506d9356af67ef8162b5e93c8ee8a00f58

            SHA256

            1346c5d51b717b9439149a39d8ebc39e99980f8b5785f225fcc12ecdd45fabeb

            SHA512

            16284492085dd4ba876d44bf348b174f99979b99df59452b943f98b14ffac7215e31bd0ec3302f52cf8ca34e652477eaeeba845dd2fd861ea0a266b498d97401

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            a05ed0eb6ea24ef05584602f43ea8bb9

            SHA1

            fe9d6f506d9356af67ef8162b5e93c8ee8a00f58

            SHA256

            1346c5d51b717b9439149a39d8ebc39e99980f8b5785f225fcc12ecdd45fabeb

            SHA512

            16284492085dd4ba876d44bf348b174f99979b99df59452b943f98b14ffac7215e31bd0ec3302f52cf8ca34e652477eaeeba845dd2fd861ea0a266b498d97401

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            8d7ddc3ef5c514a11171df2e9da36ee8

            SHA1

            35338c6790baaa13e20c125f869f305384e1bffc

            SHA256

            cff7f5fbeb29a161f6baa00daa54b251b4936dfb1f4af0b046221ac9d05c917c

            SHA512

            49449429f00ecd3c3937cfddaedbb790301a73cb2f5d5477ea07e4c722d8af5a7053a3909a213f582862895cd3f32ee2dd1664da1f7cc1bf9ea3937ec667af1a

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            ff20e643a56f70747d011f4dd6a1bd5d

            SHA1

            fc1ded5e2a98d424a495bb8f79df26e6769e1583

            SHA256

            e3f1dccef7fc3d13dd61563c2e56f16f91d35c2ddce401e8056337f190873e85

            SHA512

            624b590920b2d6baa083cb997744a0bd871970d8e285e86a6a5569edf914e9fc667099d1e6265804c599a6787aa075a16934ba3f92b5384f17a7805843c7e104

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            d4b171846d2f435baffeb94fd0f6077e

            SHA1

            4cd920954351156430ea4d5a4a22749a0567d6ce

            SHA256

            8c26af5da04981d6070e2904086eeaef869f5a5724199f78278dadaa66591c92

            SHA512

            e661874e30fc6b969e8d9e20ffc458556f5c05c8eb4a5f75263df2b9dc409f85a84f6d8613054efc82d666a3c5e7a030bf8d8a90200bea376c799493ac782544

          • memory/524-59-0x0000000000000000-mapping.dmp

          • memory/592-71-0x0000000000000000-mapping.dmp

          • memory/656-61-0x0000000000000000-mapping.dmp

          • memory/944-62-0x0000000000000000-mapping.dmp

          • memory/996-58-0x0000000000000000-mapping.dmp

          • memory/1372-87-0x0000000000000000-mapping.dmp

          • memory/1440-64-0x0000000000000000-mapping.dmp

          • memory/1632-69-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1632-54-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

            Filesize

            8KB

          • memory/1632-55-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1632-91-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1776-88-0x0000000000000000-mapping.dmp

          • memory/1840-81-0x0000000000000000-mapping.dmp

          • memory/1984-77-0x0000000000000000-mapping.dmp

          • memory/2020-82-0x0000000000000000-mapping.dmp