Analysis

  • max time kernel
    67s
  • max time network
    30s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:27

General

  • Target

    41ee1fa0d4a8dd9d4bad71197174b61d50450f5e502e01e47a291f76552ba5d0.exe

  • Size

    603KB

  • MD5

    f921dd6adf775a7111370e41fc5b0116

  • SHA1

    c0e51b5b04ba9bba2a9f019443d1d26036697c87

  • SHA256

    41ee1fa0d4a8dd9d4bad71197174b61d50450f5e502e01e47a291f76552ba5d0

  • SHA512

    0b599f64e861c500e82ecab71b20df6446244466ff150bd8a0ace2e1795cde399d991d1bb11e1c3f258d5098aaeafa343a71ee39494d4c7facc5af89d00a8ecc

  • SSDEEP

    12288:HIny5DYT3Iqr9GHF4TQNKXIqUeFldhXPkX7v9F:PUT3RrQUOK9LgZ

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\41ee1fa0d4a8dd9d4bad71197174b61d50450f5e502e01e47a291f76552ba5d0.exe
    "C:\Users\Admin\AppData\Local\Temp\41ee1fa0d4a8dd9d4bad71197174b61d50450f5e502e01e47a291f76552ba5d0.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:2016
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1316
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1504
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1044
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:268
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:276
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1328
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1292
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1788
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1936
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1988
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1564
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1812
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1160

          Network

          MITRE ATT&CK Matrix ATT&CK v6

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          1
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            e8ed84f539579995570cf5489862ce8c

            SHA1

            e9c77134d1b275be854066cde8a1d638b35adb80

            SHA256

            557c9a4c8a1f10b5de18f7460ace078afc4860146794b3fc13c32c0f4daa8043

            SHA512

            17d323d92bea215a210aa53dd7364550d28d166a1f274086896e37795f4d656a18851a3a2b7f6b9097f49d91e323ca83bb4a7befa3d7f312fc641d3f25f2fc9a

          • C:\Windows\SysWOW64\hfpapi.dll
            Filesize

            244KB

            MD5

            33066f4d07e3ac0177f44f5173666ba2

            SHA1

            eb26f448940c688e0224f3848271d29b1a0f9032

            SHA256

            d349b4680e2b1780b99f02371ab08312bb999ecb9e98f8acbe2ad20326131840

            SHA512

            d9e2ec94d50843390a699ca386bbfdbb6e778e4d639b256941fe25fea3bf440c98cd9c5127d70ac7ddd92c8cfc7b1e78651cb6dc2721223e035c0ef7c7d79518

          • C:\Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            d7c23e458931d765d0382b9f826e01a1

            SHA1

            978cae0aec44054c0f27d53bd63fe6bb728a4f75

            SHA256

            c1d8c92e329f6ce2410cddd96ea960f1671fbe109cc3af3bc45d2c0644ef9f30

            SHA512

            109ab115fb5b27588403e3c1b662d4e35744e4389326d0e757052cf6536a497709a10413d2b3f3cc86e14576928223b0dff4492dd61691ad221860ae06f02f70

          • C:\Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            121fde2404601296861fa03d1f645041

            SHA1

            dda0e671c2885460c9b8d785fdf215fd9467f7b6

            SHA256

            33291db3ed5b0cd255666d5b245185da39cadd03035d300ae4f1a1e4787de9bb

            SHA512

            380adb918b113b353d1259cc346edda4b7337d5cdd8aec36c0fd5540e3e0587701e000d37a7faab1faa1c8f0a69d9d14ca76ddb7cdf901a15a01f3ad5bbf69bf

          • C:\Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            121fde2404601296861fa03d1f645041

            SHA1

            dda0e671c2885460c9b8d785fdf215fd9467f7b6

            SHA256

            33291db3ed5b0cd255666d5b245185da39cadd03035d300ae4f1a1e4787de9bb

            SHA512

            380adb918b113b353d1259cc346edda4b7337d5cdd8aec36c0fd5540e3e0587701e000d37a7faab1faa1c8f0a69d9d14ca76ddb7cdf901a15a01f3ad5bbf69bf

          • C:\Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            8e029732f1861cf40e49f3394b13abcc

            SHA1

            6b5d123d14450ccf548d44da30a5d95cc43a603e

            SHA256

            6a01d9f4772659b606e8d4b41d897c5e42746d8b665aab2e56d91008005de0c2

            SHA512

            4289c8383aeafa904ed0bbfec7219194493bbe1736dd8bc80a01b0121a516267a4da95bf6c861f51f49fdde9ed5751f51503e36b8140c34189233e42d32c8d74

          • C:\Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            8e029732f1861cf40e49f3394b13abcc

            SHA1

            6b5d123d14450ccf548d44da30a5d95cc43a603e

            SHA256

            6a01d9f4772659b606e8d4b41d897c5e42746d8b665aab2e56d91008005de0c2

            SHA512

            4289c8383aeafa904ed0bbfec7219194493bbe1736dd8bc80a01b0121a516267a4da95bf6c861f51f49fdde9ed5751f51503e36b8140c34189233e42d32c8d74

          • \Users\Admin\AppData\Local\Temp\nsy878A.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsy878A.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy878A.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy878A.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy878A.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            e8ed84f539579995570cf5489862ce8c

            SHA1

            e9c77134d1b275be854066cde8a1d638b35adb80

            SHA256

            557c9a4c8a1f10b5de18f7460ace078afc4860146794b3fc13c32c0f4daa8043

            SHA512

            17d323d92bea215a210aa53dd7364550d28d166a1f274086896e37795f4d656a18851a3a2b7f6b9097f49d91e323ca83bb4a7befa3d7f312fc641d3f25f2fc9a

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            e8ed84f539579995570cf5489862ce8c

            SHA1

            e9c77134d1b275be854066cde8a1d638b35adb80

            SHA256

            557c9a4c8a1f10b5de18f7460ace078afc4860146794b3fc13c32c0f4daa8043

            SHA512

            17d323d92bea215a210aa53dd7364550d28d166a1f274086896e37795f4d656a18851a3a2b7f6b9097f49d91e323ca83bb4a7befa3d7f312fc641d3f25f2fc9a

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            e8ed84f539579995570cf5489862ce8c

            SHA1

            e9c77134d1b275be854066cde8a1d638b35adb80

            SHA256

            557c9a4c8a1f10b5de18f7460ace078afc4860146794b3fc13c32c0f4daa8043

            SHA512

            17d323d92bea215a210aa53dd7364550d28d166a1f274086896e37795f4d656a18851a3a2b7f6b9097f49d91e323ca83bb4a7befa3d7f312fc641d3f25f2fc9a

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            244KB

            MD5

            33066f4d07e3ac0177f44f5173666ba2

            SHA1

            eb26f448940c688e0224f3848271d29b1a0f9032

            SHA256

            d349b4680e2b1780b99f02371ab08312bb999ecb9e98f8acbe2ad20326131840

            SHA512

            d9e2ec94d50843390a699ca386bbfdbb6e778e4d639b256941fe25fea3bf440c98cd9c5127d70ac7ddd92c8cfc7b1e78651cb6dc2721223e035c0ef7c7d79518

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            244KB

            MD5

            33066f4d07e3ac0177f44f5173666ba2

            SHA1

            eb26f448940c688e0224f3848271d29b1a0f9032

            SHA256

            d349b4680e2b1780b99f02371ab08312bb999ecb9e98f8acbe2ad20326131840

            SHA512

            d9e2ec94d50843390a699ca386bbfdbb6e778e4d639b256941fe25fea3bf440c98cd9c5127d70ac7ddd92c8cfc7b1e78651cb6dc2721223e035c0ef7c7d79518

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            d7c23e458931d765d0382b9f826e01a1

            SHA1

            978cae0aec44054c0f27d53bd63fe6bb728a4f75

            SHA256

            c1d8c92e329f6ce2410cddd96ea960f1671fbe109cc3af3bc45d2c0644ef9f30

            SHA512

            109ab115fb5b27588403e3c1b662d4e35744e4389326d0e757052cf6536a497709a10413d2b3f3cc86e14576928223b0dff4492dd61691ad221860ae06f02f70

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            121fde2404601296861fa03d1f645041

            SHA1

            dda0e671c2885460c9b8d785fdf215fd9467f7b6

            SHA256

            33291db3ed5b0cd255666d5b245185da39cadd03035d300ae4f1a1e4787de9bb

            SHA512

            380adb918b113b353d1259cc346edda4b7337d5cdd8aec36c0fd5540e3e0587701e000d37a7faab1faa1c8f0a69d9d14ca76ddb7cdf901a15a01f3ad5bbf69bf

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            8e029732f1861cf40e49f3394b13abcc

            SHA1

            6b5d123d14450ccf548d44da30a5d95cc43a603e

            SHA256

            6a01d9f4772659b606e8d4b41d897c5e42746d8b665aab2e56d91008005de0c2

            SHA512

            4289c8383aeafa904ed0bbfec7219194493bbe1736dd8bc80a01b0121a516267a4da95bf6c861f51f49fdde9ed5751f51503e36b8140c34189233e42d32c8d74

          • memory/268-62-0x0000000000000000-mapping.dmp
          • memory/276-64-0x0000000000000000-mapping.dmp
          • memory/1044-61-0x0000000000000000-mapping.dmp
          • memory/1292-77-0x0000000000000000-mapping.dmp
          • memory/1316-57-0x0000000000000000-mapping.dmp
          • memory/1328-71-0x0000000000000000-mapping.dmp
          • memory/1504-58-0x0000000000000000-mapping.dmp
          • memory/1564-88-0x0000000000000000-mapping.dmp
          • memory/1788-81-0x0000000000000000-mapping.dmp
          • memory/1936-82-0x0000000000000000-mapping.dmp
          • memory/1988-87-0x0000000000000000-mapping.dmp
          • memory/2016-54-0x0000000075D61000-0x0000000075D63000-memory.dmp
            Filesize

            8KB

          • memory/2016-59-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/2016-69-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/2016-91-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB