Analysis

  • max time kernel
    42s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:08

General

  • Target

    ef55a813923caebbbaddd4ea8cf1b841530feb8cd2e1a1f7986c041212aa55c0.exe

  • Size

    591KB

  • MD5

    5c26bfa08a3610f2a17ede1f055d0f71

  • SHA1

    973b2539fa7925d2da8d662b5a8bebe08412e798

  • SHA256

    ef55a813923caebbbaddd4ea8cf1b841530feb8cd2e1a1f7986c041212aa55c0

  • SHA512

    91cad170c6a2b79152bb063912862b08823077feba35ea0b27c3576dbdf3a03f8c3ee470339ead2b9b7e280f1508175db6d117f5b7baf08bff2ca8a0e59b3369

  • SSDEEP

    12288:CIny5DYTFIts4d33BrJnz2TxrIYSGAbsk0qDHgdZFCyiIy:kUTFajTFSFIb1bhjUFCyY

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\ef55a813923caebbbaddd4ea8cf1b841530feb8cd2e1a1f7986c041212aa55c0.exe
    "C:\Users\Admin\AppData\Local\Temp\ef55a813923caebbbaddd4ea8cf1b841530feb8cd2e1a1f7986c041212aa55c0.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:560
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1628
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1676
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1708
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1664
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1552
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1308
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:696
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1172
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1116
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:772
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1384
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1204
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:932

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            625d4a5275199d4b091893ac2748dc17

            SHA1

            df2b84775592385a9a8459bfe0af2518e5ec3fe0

            SHA256

            e4b609527a1688a56b9daeae775d6de21e077ebca0fdd22d35670bf820cc0e2e

            SHA512

            37cb6e6a8aa942f5dbb784979aa3592953794cf0f744aaefbeadf609a5a6a894e090b6cbb0ac097a76a0f180c775aa74bff84359e07830e03cafd39bfe130bf6

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            bb8d01fe231c321a3c068ac19360424f

            SHA1

            3f2ceeb9dd56ba3c23510a20f659f75dd97ff118

            SHA256

            8d1e9e3b2aa2385f02874d6be4333f55f8c32e89e8bad87928d4d0b611e45ea2

            SHA512

            07e724cf4d2bc84c9a7a549799a59a46d06aabca27de024e5ae390a47f1f37515b89c3d9d384769a76147d99484035ebd830be5cb2bb0453378d5715d8d48d07

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            f23147f92e6676031ab01d9315b57d42

            SHA1

            e01d65491667486df4605c2e66883cccb6be4fa5

            SHA256

            5608a510c76e7ac018b02858ea9778c792b47475ffcabb9e306a88746c90f9a3

            SHA512

            c82900ca7a71622ff839bbc864d0746e30dc84be87665a87abf5bdc341b84da9960659b1daf94aba562c560dc6f23ad90accb96b0efff3a240f4c6f8548fcf30

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            f7eb718730132aabec4d196039ed0d10

            SHA1

            941f5aec11c4ef973c94b0cf2a5a323125d42d27

            SHA256

            6a86725cc3c50a946ec7bbd81a3aebb6e8c3b439350fe2e9da464aaaa72e8d1f

            SHA512

            90715fc0eda99a1c16fcc4295353bd269d390a5cd2416835855adfdd027a2b3d30333ed500e2c54fd685525ce66461eb6604f7ee295e7509f0a6fb5079b8e44e

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            f7eb718730132aabec4d196039ed0d10

            SHA1

            941f5aec11c4ef973c94b0cf2a5a323125d42d27

            SHA256

            6a86725cc3c50a946ec7bbd81a3aebb6e8c3b439350fe2e9da464aaaa72e8d1f

            SHA512

            90715fc0eda99a1c16fcc4295353bd269d390a5cd2416835855adfdd027a2b3d30333ed500e2c54fd685525ce66461eb6604f7ee295e7509f0a6fb5079b8e44e

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            f58f528518ddb732f79cf937b9999c92

            SHA1

            65f5376bec46714381f583ac05842825e177896b

            SHA256

            a445365dcc709ed76aa70ba8410436fa1a8900af86dbf71ad997ac61cc2bead4

            SHA512

            e7c751588c94ae17c27b8778ddd196879f58f4b1ae00874c1e2924a50275e63ef6a7e47d212d7cf3968af63d2f759e88c901709b63eefaf270e15f25f975300e

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            f58f528518ddb732f79cf937b9999c92

            SHA1

            65f5376bec46714381f583ac05842825e177896b

            SHA256

            a445365dcc709ed76aa70ba8410436fa1a8900af86dbf71ad997ac61cc2bead4

            SHA512

            e7c751588c94ae17c27b8778ddd196879f58f4b1ae00874c1e2924a50275e63ef6a7e47d212d7cf3968af63d2f759e88c901709b63eefaf270e15f25f975300e

          • \Users\Admin\AppData\Local\Temp\nsiFA68.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsiFA68.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsiFA68.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsiFA68.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsiFA68.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            625d4a5275199d4b091893ac2748dc17

            SHA1

            df2b84775592385a9a8459bfe0af2518e5ec3fe0

            SHA256

            e4b609527a1688a56b9daeae775d6de21e077ebca0fdd22d35670bf820cc0e2e

            SHA512

            37cb6e6a8aa942f5dbb784979aa3592953794cf0f744aaefbeadf609a5a6a894e090b6cbb0ac097a76a0f180c775aa74bff84359e07830e03cafd39bfe130bf6

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            625d4a5275199d4b091893ac2748dc17

            SHA1

            df2b84775592385a9a8459bfe0af2518e5ec3fe0

            SHA256

            e4b609527a1688a56b9daeae775d6de21e077ebca0fdd22d35670bf820cc0e2e

            SHA512

            37cb6e6a8aa942f5dbb784979aa3592953794cf0f744aaefbeadf609a5a6a894e090b6cbb0ac097a76a0f180c775aa74bff84359e07830e03cafd39bfe130bf6

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            625d4a5275199d4b091893ac2748dc17

            SHA1

            df2b84775592385a9a8459bfe0af2518e5ec3fe0

            SHA256

            e4b609527a1688a56b9daeae775d6de21e077ebca0fdd22d35670bf820cc0e2e

            SHA512

            37cb6e6a8aa942f5dbb784979aa3592953794cf0f744aaefbeadf609a5a6a894e090b6cbb0ac097a76a0f180c775aa74bff84359e07830e03cafd39bfe130bf6

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            bb8d01fe231c321a3c068ac19360424f

            SHA1

            3f2ceeb9dd56ba3c23510a20f659f75dd97ff118

            SHA256

            8d1e9e3b2aa2385f02874d6be4333f55f8c32e89e8bad87928d4d0b611e45ea2

            SHA512

            07e724cf4d2bc84c9a7a549799a59a46d06aabca27de024e5ae390a47f1f37515b89c3d9d384769a76147d99484035ebd830be5cb2bb0453378d5715d8d48d07

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            bb8d01fe231c321a3c068ac19360424f

            SHA1

            3f2ceeb9dd56ba3c23510a20f659f75dd97ff118

            SHA256

            8d1e9e3b2aa2385f02874d6be4333f55f8c32e89e8bad87928d4d0b611e45ea2

            SHA512

            07e724cf4d2bc84c9a7a549799a59a46d06aabca27de024e5ae390a47f1f37515b89c3d9d384769a76147d99484035ebd830be5cb2bb0453378d5715d8d48d07

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            f23147f92e6676031ab01d9315b57d42

            SHA1

            e01d65491667486df4605c2e66883cccb6be4fa5

            SHA256

            5608a510c76e7ac018b02858ea9778c792b47475ffcabb9e306a88746c90f9a3

            SHA512

            c82900ca7a71622ff839bbc864d0746e30dc84be87665a87abf5bdc341b84da9960659b1daf94aba562c560dc6f23ad90accb96b0efff3a240f4c6f8548fcf30

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            f7eb718730132aabec4d196039ed0d10

            SHA1

            941f5aec11c4ef973c94b0cf2a5a323125d42d27

            SHA256

            6a86725cc3c50a946ec7bbd81a3aebb6e8c3b439350fe2e9da464aaaa72e8d1f

            SHA512

            90715fc0eda99a1c16fcc4295353bd269d390a5cd2416835855adfdd027a2b3d30333ed500e2c54fd685525ce66461eb6604f7ee295e7509f0a6fb5079b8e44e

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            f58f528518ddb732f79cf937b9999c92

            SHA1

            65f5376bec46714381f583ac05842825e177896b

            SHA256

            a445365dcc709ed76aa70ba8410436fa1a8900af86dbf71ad997ac61cc2bead4

            SHA512

            e7c751588c94ae17c27b8778ddd196879f58f4b1ae00874c1e2924a50275e63ef6a7e47d212d7cf3968af63d2f759e88c901709b63eefaf270e15f25f975300e

          • memory/560-69-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/560-54-0x0000000076041000-0x0000000076043000-memory.dmp

            Filesize

            8KB

          • memory/560-59-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/560-91-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/696-77-0x0000000000000000-mapping.dmp

          • memory/772-87-0x0000000000000000-mapping.dmp

          • memory/1116-82-0x0000000000000000-mapping.dmp

          • memory/1172-81-0x0000000000000000-mapping.dmp

          • memory/1308-71-0x0000000000000000-mapping.dmp

          • memory/1384-88-0x0000000000000000-mapping.dmp

          • memory/1552-64-0x0000000000000000-mapping.dmp

          • memory/1628-57-0x0000000000000000-mapping.dmp

          • memory/1664-62-0x0000000000000000-mapping.dmp

          • memory/1676-58-0x0000000000000000-mapping.dmp

          • memory/1708-61-0x0000000000000000-mapping.dmp