Analysis

  • max time kernel
    10s
  • 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 10:18

General

  • Target

    99cdf2b219ddef485097c8eeea94b0257a038f5c7ebf73adb94e58af4ca2cd71.exe

  • Size

    603KB

  • MD5

    c6de389f6a51ab905d14c7ea42826745

  • SHA1

    15c500b83d989c1e2803b63206345d0031bae313

  • SHA256

    99cdf2b219ddef485097c8eeea94b0257a038f5c7ebf73adb94e58af4ca2cd71

  • SHA512

    348cf455cb6d3abc889258111fa2967e4670f980b742cff5fb327c8bf38cfd59bd6daaf4d3bd04932a836a3c1600b5d3cc20cb79d40d903021f82cd65becb070

  • SSDEEP

    6144:56sFuai9ny5DYTBZopeuIX4kFkYCfWUsqJXY0UMGO8G+Qke7At8N3xmTe5WKG9lZ:zIny5DYTMIIwHIWDtZCQhjZifVuyTOk

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\99cdf2b219ddef485097c8eeea94b0257a038f5c7ebf73adb94e58af4ca2cd71.exe
    "C:\Users\Admin\AppData\Local\Temp\99cdf2b219ddef485097c8eeea94b0257a038f5c7ebf73adb94e58af4ca2cd71.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:1604
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1436
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:2036
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1724
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1980
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1224
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1320
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1280
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1884
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:828
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1672
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:564
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1520
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1404

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            31530e90c9bbe76c554a4ce5e1675441

            SHA1

            ee7ae64c375fce92f4174dcba4ff65edbfe3d1f5

            SHA256

            9229278f9204526d02ad43bd8c674ba66fe68052e3cf0eec249a9dc0c7823254

            SHA512

            e1964a37d2d593dad0063f0352a566b2536b7a8a09d633769926573d7233d0cefe8fab73fabc37637719fe961efe3589b0b5f7a03fe7d611ed66b8c18c1ed5b4

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            c8d8e7c04475d06acf9146607a004abc

            SHA1

            82f8e92f34d29955733d1dc43dd0fb77890d34c7

            SHA256

            ed37e552261333cb01f88043f92ab996c5784bc5f99d77b459e42598e92126cb

            SHA512

            54d2b0b7c714d90697d81fb660f15af958cd8ed56b7b9e3a81f04f0385cba3744e5466fc9296729ef647884dcfd0d694c695db2ac937265de67b32280d48ec9c

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            0d2cde90ecf9ff13fb19881b9a66bf46

            SHA1

            f579cb3adbb7c66335d2b26b1dd683217c432027

            SHA256

            ac395c455e787dcc70cd862f3373e11faf052514ec124bcd69f64c7206e8241f

            SHA512

            d73cbdd2c41cc94183ba8f0df6d84889579b767fc40f54fd320274a3bd0046b622a07cb3db1275b5a1453727c5f1b6e79775dbd01877a8082885fd326f958768

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1bf2d566f2ce990c3f332c206ab24c84

            SHA1

            8cee28f8899ae850f46e55ec8ce78568125571f4

            SHA256

            11799ef9a732d0ad395f4c291d6578582d62ca26ed84cf584fdb0ebe41ba500f

            SHA512

            85a2edf81c13dd798d3b6c50c6a71aafef486326bddba86b911cc899e0e24c2316a74ecd2f5b0e742718ea0539ff5c42e2c955d421e431f1c033d5f35ab47ec9

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1bf2d566f2ce990c3f332c206ab24c84

            SHA1

            8cee28f8899ae850f46e55ec8ce78568125571f4

            SHA256

            11799ef9a732d0ad395f4c291d6578582d62ca26ed84cf584fdb0ebe41ba500f

            SHA512

            85a2edf81c13dd798d3b6c50c6a71aafef486326bddba86b911cc899e0e24c2316a74ecd2f5b0e742718ea0539ff5c42e2c955d421e431f1c033d5f35ab47ec9

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            cbf650c4f15340e4a983d575f74bbf72

            SHA1

            31d5a4b59086eb51139ab95ff794d4671875e12a

            SHA256

            66dd1586b199ce3237dfd23c61cf5abe89109ffadfeb51d866d44d13d469967c

            SHA512

            b3093847d82a3f211156801be7193a43aed6837dcdf5c13fb99324733755a771ba71f7132b4fc8fad0ffb4c2768a90d85a10edec36400702d21c19fc61d99c30

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            cbf650c4f15340e4a983d575f74bbf72

            SHA1

            31d5a4b59086eb51139ab95ff794d4671875e12a

            SHA256

            66dd1586b199ce3237dfd23c61cf5abe89109ffadfeb51d866d44d13d469967c

            SHA512

            b3093847d82a3f211156801be7193a43aed6837dcdf5c13fb99324733755a771ba71f7132b4fc8fad0ffb4c2768a90d85a10edec36400702d21c19fc61d99c30

          • \Users\Admin\AppData\Local\Temp\nso7ACE.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nso7ACE.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso7ACE.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso7ACE.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso7ACE.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            31530e90c9bbe76c554a4ce5e1675441

            SHA1

            ee7ae64c375fce92f4174dcba4ff65edbfe3d1f5

            SHA256

            9229278f9204526d02ad43bd8c674ba66fe68052e3cf0eec249a9dc0c7823254

            SHA512

            e1964a37d2d593dad0063f0352a566b2536b7a8a09d633769926573d7233d0cefe8fab73fabc37637719fe961efe3589b0b5f7a03fe7d611ed66b8c18c1ed5b4

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            31530e90c9bbe76c554a4ce5e1675441

            SHA1

            ee7ae64c375fce92f4174dcba4ff65edbfe3d1f5

            SHA256

            9229278f9204526d02ad43bd8c674ba66fe68052e3cf0eec249a9dc0c7823254

            SHA512

            e1964a37d2d593dad0063f0352a566b2536b7a8a09d633769926573d7233d0cefe8fab73fabc37637719fe961efe3589b0b5f7a03fe7d611ed66b8c18c1ed5b4

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            31530e90c9bbe76c554a4ce5e1675441

            SHA1

            ee7ae64c375fce92f4174dcba4ff65edbfe3d1f5

            SHA256

            9229278f9204526d02ad43bd8c674ba66fe68052e3cf0eec249a9dc0c7823254

            SHA512

            e1964a37d2d593dad0063f0352a566b2536b7a8a09d633769926573d7233d0cefe8fab73fabc37637719fe961efe3589b0b5f7a03fe7d611ed66b8c18c1ed5b4

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            c8d8e7c04475d06acf9146607a004abc

            SHA1

            82f8e92f34d29955733d1dc43dd0fb77890d34c7

            SHA256

            ed37e552261333cb01f88043f92ab996c5784bc5f99d77b459e42598e92126cb

            SHA512

            54d2b0b7c714d90697d81fb660f15af958cd8ed56b7b9e3a81f04f0385cba3744e5466fc9296729ef647884dcfd0d694c695db2ac937265de67b32280d48ec9c

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            c8d8e7c04475d06acf9146607a004abc

            SHA1

            82f8e92f34d29955733d1dc43dd0fb77890d34c7

            SHA256

            ed37e552261333cb01f88043f92ab996c5784bc5f99d77b459e42598e92126cb

            SHA512

            54d2b0b7c714d90697d81fb660f15af958cd8ed56b7b9e3a81f04f0385cba3744e5466fc9296729ef647884dcfd0d694c695db2ac937265de67b32280d48ec9c

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            0d2cde90ecf9ff13fb19881b9a66bf46

            SHA1

            f579cb3adbb7c66335d2b26b1dd683217c432027

            SHA256

            ac395c455e787dcc70cd862f3373e11faf052514ec124bcd69f64c7206e8241f

            SHA512

            d73cbdd2c41cc94183ba8f0df6d84889579b767fc40f54fd320274a3bd0046b622a07cb3db1275b5a1453727c5f1b6e79775dbd01877a8082885fd326f958768

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1bf2d566f2ce990c3f332c206ab24c84

            SHA1

            8cee28f8899ae850f46e55ec8ce78568125571f4

            SHA256

            11799ef9a732d0ad395f4c291d6578582d62ca26ed84cf584fdb0ebe41ba500f

            SHA512

            85a2edf81c13dd798d3b6c50c6a71aafef486326bddba86b911cc899e0e24c2316a74ecd2f5b0e742718ea0539ff5c42e2c955d421e431f1c033d5f35ab47ec9

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            cbf650c4f15340e4a983d575f74bbf72

            SHA1

            31d5a4b59086eb51139ab95ff794d4671875e12a

            SHA256

            66dd1586b199ce3237dfd23c61cf5abe89109ffadfeb51d866d44d13d469967c

            SHA512

            b3093847d82a3f211156801be7193a43aed6837dcdf5c13fb99324733755a771ba71f7132b4fc8fad0ffb4c2768a90d85a10edec36400702d21c19fc61d99c30

          • memory/564-87-0x0000000000000000-mapping.dmp

          • memory/828-81-0x0000000000000000-mapping.dmp

          • memory/1224-64-0x0000000000000000-mapping.dmp

          • memory/1280-76-0x0000000000000000-mapping.dmp

          • memory/1320-70-0x0000000000000000-mapping.dmp

          • memory/1436-58-0x0000000000000000-mapping.dmp

          • memory/1604-54-0x0000000076DC1000-0x0000000076DC3000-memory.dmp

            Filesize

            8KB

          • memory/1604-90-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1604-55-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1672-86-0x0000000000000000-mapping.dmp

          • memory/1724-61-0x0000000000000000-mapping.dmp

          • memory/1884-80-0x0000000000000000-mapping.dmp

          • memory/1980-62-0x0000000000000000-mapping.dmp

          • memory/2036-59-0x0000000000000000-mapping.dmp