Analysis

  • max time kernel
    43s
  • max time network
    50s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:31

General

  • Target

    21b141186fc04fe963f6e5f9b53124cbd2333bbeca211b3cc9c8f1297b73550f.exe

  • Size

    603KB

  • MD5

    efa83f7c6af590c120865f2cb7db8d15

  • SHA1

    73f4dbf6db42f9346fa541ca97b27cacb529109e

  • SHA256

    21b141186fc04fe963f6e5f9b53124cbd2333bbeca211b3cc9c8f1297b73550f

  • SHA512

    e1da701e401ac4922ceaa41ab781209cc79565ea7eac962bececc92685c390215491b6d9f21777cf50ea997d04ec62534489bcaee44d010d5bef8d8db892b4ea

  • SSDEEP

    12288:OIny5DYTGLr7Cobogt9v0w+POV3N1R+7iFbA1DjDJgWFr:QUTeboRWd7wd3VF

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\21b141186fc04fe963f6e5f9b53124cbd2333bbeca211b3cc9c8f1297b73550f.exe
    "C:\Users\Admin\AppData\Local\Temp\21b141186fc04fe963f6e5f9b53124cbd2333bbeca211b3cc9c8f1297b73550f.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:1700
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:940
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1020
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:392
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:664
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:860
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1536
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1568
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1908
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:2012
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1948
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:764
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1064
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:532

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            8f1abdf334f71eadedcd8dbf12ac522c

            SHA1

            0545a0a61c1ff796be053efe32b045dd31ad602a

            SHA256

            0aeac1c187a580d2b1a4c25d49e46d13f09396c35feb4ca854d129565dfb49da

            SHA512

            76de44603a4b97cdfb594b261f7128acdfe28bb34e7935ecc0f8f975b1799c473e532c405b61442ee6c5126fd65e6b1359d6a1bce74e20c793f277d2e537dd63

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            a721dfa17a26e2b392c24eaf61dc97bb

            SHA1

            23df47f46a1f592c54904794b62c6d21ba5d2008

            SHA256

            89b43e4ee03a4d545fa0820c7d5919b6a3cb9f07dfde0bf3a003e3bd5d566de6

            SHA512

            f8a8c3075a2f57bf07f1617b6d6e201b421ca5a970f769db039bbbaac374d92168ac5d7121552dc4e711e41dec2ea284ed2287ce99440d2acb8da9c8c5911568

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            f7d6e64c126752ed3d5b84563a29bf51

            SHA1

            78f70221e1c75900a369486f06a8536e9d3ad1b8

            SHA256

            7cd662c7b9c259fa0fe01358d323e1922cbc962bea41f25d66691c6124c38c17

            SHA512

            b08e341002fd407bc48229baa1664c86a987ef355c5f833a2fb401cecdc8cdd395081324846bb5af3d50093c48863b135d5c552e0afbe5c5ae23177d0dc6e157

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            cc9c0b8152feae1c54ea72a2ad229c8e

            SHA1

            94ac13c9d629592008893394283a66f66522c964

            SHA256

            e0ad46043d1e2935859840837b031291735357fe8080d610a26f41e31eba627b

            SHA512

            72bfe276cd01734f6969ca2412647c7b7bfdc6bd45f133365df3878419750c0fde2f666dc651d78a3b423752c52d540e3d8e30efa45ab627949bf01770c721a5

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            cc9c0b8152feae1c54ea72a2ad229c8e

            SHA1

            94ac13c9d629592008893394283a66f66522c964

            SHA256

            e0ad46043d1e2935859840837b031291735357fe8080d610a26f41e31eba627b

            SHA512

            72bfe276cd01734f6969ca2412647c7b7bfdc6bd45f133365df3878419750c0fde2f666dc651d78a3b423752c52d540e3d8e30efa45ab627949bf01770c721a5

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            8c0bf006d8d7c2235cfc309e95ab9055

            SHA1

            cb6230884654cf55800f4a434a8214655629a851

            SHA256

            5c5a5d67f45440c04a188691905ada442a1e4abf30f8be9e77d1548c507cfb94

            SHA512

            b7bf00287acabe41e96591089e5738b46430e7ac1ef9e001cdc8e1677e67603edeab512aa848d9454b10d5e6bceb4bcb43e367980a2cd4bc00e97141292812cb

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            8c0bf006d8d7c2235cfc309e95ab9055

            SHA1

            cb6230884654cf55800f4a434a8214655629a851

            SHA256

            5c5a5d67f45440c04a188691905ada442a1e4abf30f8be9e77d1548c507cfb94

            SHA512

            b7bf00287acabe41e96591089e5738b46430e7ac1ef9e001cdc8e1677e67603edeab512aa848d9454b10d5e6bceb4bcb43e367980a2cd4bc00e97141292812cb

          • \Users\Admin\AppData\Local\Temp\nso3556.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nso3556.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso3556.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso3556.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nso3556.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            8f1abdf334f71eadedcd8dbf12ac522c

            SHA1

            0545a0a61c1ff796be053efe32b045dd31ad602a

            SHA256

            0aeac1c187a580d2b1a4c25d49e46d13f09396c35feb4ca854d129565dfb49da

            SHA512

            76de44603a4b97cdfb594b261f7128acdfe28bb34e7935ecc0f8f975b1799c473e532c405b61442ee6c5126fd65e6b1359d6a1bce74e20c793f277d2e537dd63

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            8f1abdf334f71eadedcd8dbf12ac522c

            SHA1

            0545a0a61c1ff796be053efe32b045dd31ad602a

            SHA256

            0aeac1c187a580d2b1a4c25d49e46d13f09396c35feb4ca854d129565dfb49da

            SHA512

            76de44603a4b97cdfb594b261f7128acdfe28bb34e7935ecc0f8f975b1799c473e532c405b61442ee6c5126fd65e6b1359d6a1bce74e20c793f277d2e537dd63

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            8f1abdf334f71eadedcd8dbf12ac522c

            SHA1

            0545a0a61c1ff796be053efe32b045dd31ad602a

            SHA256

            0aeac1c187a580d2b1a4c25d49e46d13f09396c35feb4ca854d129565dfb49da

            SHA512

            76de44603a4b97cdfb594b261f7128acdfe28bb34e7935ecc0f8f975b1799c473e532c405b61442ee6c5126fd65e6b1359d6a1bce74e20c793f277d2e537dd63

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            a721dfa17a26e2b392c24eaf61dc97bb

            SHA1

            23df47f46a1f592c54904794b62c6d21ba5d2008

            SHA256

            89b43e4ee03a4d545fa0820c7d5919b6a3cb9f07dfde0bf3a003e3bd5d566de6

            SHA512

            f8a8c3075a2f57bf07f1617b6d6e201b421ca5a970f769db039bbbaac374d92168ac5d7121552dc4e711e41dec2ea284ed2287ce99440d2acb8da9c8c5911568

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            a721dfa17a26e2b392c24eaf61dc97bb

            SHA1

            23df47f46a1f592c54904794b62c6d21ba5d2008

            SHA256

            89b43e4ee03a4d545fa0820c7d5919b6a3cb9f07dfde0bf3a003e3bd5d566de6

            SHA512

            f8a8c3075a2f57bf07f1617b6d6e201b421ca5a970f769db039bbbaac374d92168ac5d7121552dc4e711e41dec2ea284ed2287ce99440d2acb8da9c8c5911568

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            f7d6e64c126752ed3d5b84563a29bf51

            SHA1

            78f70221e1c75900a369486f06a8536e9d3ad1b8

            SHA256

            7cd662c7b9c259fa0fe01358d323e1922cbc962bea41f25d66691c6124c38c17

            SHA512

            b08e341002fd407bc48229baa1664c86a987ef355c5f833a2fb401cecdc8cdd395081324846bb5af3d50093c48863b135d5c552e0afbe5c5ae23177d0dc6e157

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            cc9c0b8152feae1c54ea72a2ad229c8e

            SHA1

            94ac13c9d629592008893394283a66f66522c964

            SHA256

            e0ad46043d1e2935859840837b031291735357fe8080d610a26f41e31eba627b

            SHA512

            72bfe276cd01734f6969ca2412647c7b7bfdc6bd45f133365df3878419750c0fde2f666dc651d78a3b423752c52d540e3d8e30efa45ab627949bf01770c721a5

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            8c0bf006d8d7c2235cfc309e95ab9055

            SHA1

            cb6230884654cf55800f4a434a8214655629a851

            SHA256

            5c5a5d67f45440c04a188691905ada442a1e4abf30f8be9e77d1548c507cfb94

            SHA512

            b7bf00287acabe41e96591089e5738b46430e7ac1ef9e001cdc8e1677e67603edeab512aa848d9454b10d5e6bceb4bcb43e367980a2cd4bc00e97141292812cb

          • memory/392-60-0x0000000000000000-mapping.dmp

          • memory/664-61-0x0000000000000000-mapping.dmp

          • memory/764-87-0x0000000000000000-mapping.dmp

          • memory/860-64-0x0000000000000000-mapping.dmp

          • memory/940-57-0x0000000000000000-mapping.dmp

          • memory/1020-58-0x0000000000000000-mapping.dmp

          • memory/1536-70-0x0000000000000000-mapping.dmp

          • memory/1568-76-0x0000000000000000-mapping.dmp

          • memory/1700-62-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1700-54-0x0000000074E41000-0x0000000074E43000-memory.dmp

            Filesize

            8KB

          • memory/1700-90-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1908-80-0x0000000000000000-mapping.dmp

          • memory/1948-86-0x0000000000000000-mapping.dmp

          • memory/2012-81-0x0000000000000000-mapping.dmp