Analysis

  • max time kernel
    51s
  • max time network
    47s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    24/11/2022, 06:10

General

  • Target

    99b3d81f7e2b61b7dfb04ba956c4b5ffa3bf54a1db25614cbf4a584a17f77ed3.exe

  • Size

    675KB

  • MD5

    15b1c02c1b641a6fc0e532ee69a3f5ad

  • SHA1

    5f3af736e9d4ae99cf8470946d6cff27286b52e4

  • SHA256

    99b3d81f7e2b61b7dfb04ba956c4b5ffa3bf54a1db25614cbf4a584a17f77ed3

  • SHA512

    4ab356f5c1ea5f21b27a2e5dc96ef1ace8fb7ae6ab890ed3b04752a4e67ad3de5860736b46dad25e85cc14cce4d81bf0e99716598a9fd5f585d56c8b061c9a0c

  • SSDEEP

    12288:Kdgmy6lZ8E9soPvow2bf34e2/Da736JUzGtDSt1+Qrc7St0t1R11Pm2M4vQBKu:KdgX6tTLaf1V3pAcSjRjm29AKu

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\99b3d81f7e2b61b7dfb04ba956c4b5ffa3bf54a1db25614cbf4a584a17f77ed3.exe
    "C:\Users\Admin\AppData\Local\Temp\99b3d81f7e2b61b7dfb04ba956c4b5ffa3bf54a1db25614cbf4a584a17f77ed3.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:1232
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1580
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1252
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1620
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1616
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1448
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1796
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1496
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1688
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1076
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1648
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1428
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:772
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1984

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                • C:\Windows\SysWOW64\hfnapi.dll

                  Filesize

                  106KB

                  MD5

                  81759cf5030b4ed8cbf2f3fd54fbea18

                  SHA1

                  ff01e75b08ac9171c4aee3000f6e3cb3058a4ab4

                  SHA256

                  15d7ec02bb725aca1a66f1f3805f9cb6edb23f773dde993238ee2c82e59eedd1

                  SHA512

                  ffe9c60dadecb27db509230f1784c68e9dbe94d30998b7f373f212d3dc95bc5b4490acaffbb54968f72adebb58a0d4b6b6e763f2745d42fc871488bf009d66d6

                • C:\Windows\SysWOW64\hfpapi.dll

                  Filesize

                  241KB

                  MD5

                  91b59fd50d86a8c6e3f754b4529c1630

                  SHA1

                  7a70eb633526e71383cbc84a71a079cb8e07fe1f

                  SHA256

                  b934482dd495f2a698e1f9382302cdabfab9f6a472123d4cadbb313b1794ec37

                  SHA512

                  c54b6517a92334c81fc6276aa464fdb6c7b89deb028a41451aac3659650764826bad27f8969b870a247ae3994d19d96d0226497f8b7cbc1081de2acb80691795

                • C:\Windows\SysWOW64\installd.exe

                  Filesize

                  108KB

                  MD5

                  539ebb0cefb4d708d80c894c514d6e6a

                  SHA1

                  7dd8414b66ecf0f43a48a96ae35264f1a860ae9f

                  SHA256

                  8e1482107abf927934b653c390bb310a50a852af9e5c9c789f19a190228bef08

                  SHA512

                  f6426474e8e1e1fda088b15977e9b2eb282bd39832ccc42e0cb03dbb9f0ebcdb0e9c6f59be78e4e57f6ad789af0bfb4cc241d6e2bdcaa7cef4211f00ec55993c

                • C:\Windows\SysWOW64\nethtsrv.exe

                  Filesize

                  176KB

                  MD5

                  9e5fe89148026bd16918f1c3b033272f

                  SHA1

                  e68251af0d6194a755d4107506205df2700d8b92

                  SHA256

                  74254cd50dc582b82a631a9b5ddee7e520cf603071a8cf66a151c4726af88ddf

                  SHA512

                  a7e94520512a16e9e4c21518a590cc0b87a1ce80b5c9b95c34df25746217a2d22fae0259f9fa85ea6647c1ee37308edc18c388ecc824d79f557b663f70d4f6a2

                • C:\Windows\SysWOW64\nethtsrv.exe

                  Filesize

                  176KB

                  MD5

                  9e5fe89148026bd16918f1c3b033272f

                  SHA1

                  e68251af0d6194a755d4107506205df2700d8b92

                  SHA256

                  74254cd50dc582b82a631a9b5ddee7e520cf603071a8cf66a151c4726af88ddf

                  SHA512

                  a7e94520512a16e9e4c21518a590cc0b87a1ce80b5c9b95c34df25746217a2d22fae0259f9fa85ea6647c1ee37308edc18c388ecc824d79f557b663f70d4f6a2

                • C:\Windows\SysWOW64\netupdsrv.exe

                  Filesize

                  158KB

                  MD5

                  0502c3fcf5fcf1dfd0f7c980f5ce20ab

                  SHA1

                  95e86b011026843b42b63f2d62619aaaa37cad1d

                  SHA256

                  a69006d5030058d25b2b0aca4d13e1acb1523a14be16324f80dc958e745b7cca

                  SHA512

                  5e73d64786dd5425c56c339b07dff31532c2dc20820909e9a4511f2655c42d3f40b67bc405ff596d86ee34b0d176e89af78570fc46c540c1dd122a170ea8127e

                • C:\Windows\SysWOW64\netupdsrv.exe

                  Filesize

                  158KB

                  MD5

                  0502c3fcf5fcf1dfd0f7c980f5ce20ab

                  SHA1

                  95e86b011026843b42b63f2d62619aaaa37cad1d

                  SHA256

                  a69006d5030058d25b2b0aca4d13e1acb1523a14be16324f80dc958e745b7cca

                  SHA512

                  5e73d64786dd5425c56c339b07dff31532c2dc20820909e9a4511f2655c42d3f40b67bc405ff596d86ee34b0d176e89af78570fc46c540c1dd122a170ea8127e

                • \Users\Admin\AppData\Local\Temp\nso6B92.tmp\System.dll

                  Filesize

                  11KB

                  MD5

                  c17103ae9072a06da581dec998343fc1

                  SHA1

                  b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

                  SHA256

                  dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

                  SHA512

                  d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

                • \Users\Admin\AppData\Local\Temp\nso6B92.tmp\nsExec.dll

                  Filesize

                  6KB

                  MD5

                  acc2b699edfea5bf5aae45aba3a41e96

                  SHA1

                  d2accf4d494e43ceb2cff69abe4dd17147d29cc2

                  SHA256

                  168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

                  SHA512

                  e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

                • \Users\Admin\AppData\Local\Temp\nso6B92.tmp\nsExec.dll

                  Filesize

                  6KB

                  MD5

                  acc2b699edfea5bf5aae45aba3a41e96

                  SHA1

                  d2accf4d494e43ceb2cff69abe4dd17147d29cc2

                  SHA256

                  168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

                  SHA512

                  e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

                • \Users\Admin\AppData\Local\Temp\nso6B92.tmp\nsExec.dll

                  Filesize

                  6KB

                  MD5

                  acc2b699edfea5bf5aae45aba3a41e96

                  SHA1

                  d2accf4d494e43ceb2cff69abe4dd17147d29cc2

                  SHA256

                  168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

                  SHA512

                  e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

                • \Users\Admin\AppData\Local\Temp\nso6B92.tmp\nsExec.dll

                  Filesize

                  6KB

                  MD5

                  acc2b699edfea5bf5aae45aba3a41e96

                  SHA1

                  d2accf4d494e43ceb2cff69abe4dd17147d29cc2

                  SHA256

                  168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

                  SHA512

                  e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

                • \Windows\SysWOW64\hfnapi.dll

                  Filesize

                  106KB

                  MD5

                  81759cf5030b4ed8cbf2f3fd54fbea18

                  SHA1

                  ff01e75b08ac9171c4aee3000f6e3cb3058a4ab4

                  SHA256

                  15d7ec02bb725aca1a66f1f3805f9cb6edb23f773dde993238ee2c82e59eedd1

                  SHA512

                  ffe9c60dadecb27db509230f1784c68e9dbe94d30998b7f373f212d3dc95bc5b4490acaffbb54968f72adebb58a0d4b6b6e763f2745d42fc871488bf009d66d6

                • \Windows\SysWOW64\hfnapi.dll

                  Filesize

                  106KB

                  MD5

                  81759cf5030b4ed8cbf2f3fd54fbea18

                  SHA1

                  ff01e75b08ac9171c4aee3000f6e3cb3058a4ab4

                  SHA256

                  15d7ec02bb725aca1a66f1f3805f9cb6edb23f773dde993238ee2c82e59eedd1

                  SHA512

                  ffe9c60dadecb27db509230f1784c68e9dbe94d30998b7f373f212d3dc95bc5b4490acaffbb54968f72adebb58a0d4b6b6e763f2745d42fc871488bf009d66d6

                • \Windows\SysWOW64\hfnapi.dll

                  Filesize

                  106KB

                  MD5

                  81759cf5030b4ed8cbf2f3fd54fbea18

                  SHA1

                  ff01e75b08ac9171c4aee3000f6e3cb3058a4ab4

                  SHA256

                  15d7ec02bb725aca1a66f1f3805f9cb6edb23f773dde993238ee2c82e59eedd1

                  SHA512

                  ffe9c60dadecb27db509230f1784c68e9dbe94d30998b7f373f212d3dc95bc5b4490acaffbb54968f72adebb58a0d4b6b6e763f2745d42fc871488bf009d66d6

                • \Windows\SysWOW64\hfpapi.dll

                  Filesize

                  241KB

                  MD5

                  91b59fd50d86a8c6e3f754b4529c1630

                  SHA1

                  7a70eb633526e71383cbc84a71a079cb8e07fe1f

                  SHA256

                  b934482dd495f2a698e1f9382302cdabfab9f6a472123d4cadbb313b1794ec37

                  SHA512

                  c54b6517a92334c81fc6276aa464fdb6c7b89deb028a41451aac3659650764826bad27f8969b870a247ae3994d19d96d0226497f8b7cbc1081de2acb80691795

                • \Windows\SysWOW64\hfpapi.dll

                  Filesize

                  241KB

                  MD5

                  91b59fd50d86a8c6e3f754b4529c1630

                  SHA1

                  7a70eb633526e71383cbc84a71a079cb8e07fe1f

                  SHA256

                  b934482dd495f2a698e1f9382302cdabfab9f6a472123d4cadbb313b1794ec37

                  SHA512

                  c54b6517a92334c81fc6276aa464fdb6c7b89deb028a41451aac3659650764826bad27f8969b870a247ae3994d19d96d0226497f8b7cbc1081de2acb80691795

                • \Windows\SysWOW64\installd.exe

                  Filesize

                  108KB

                  MD5

                  539ebb0cefb4d708d80c894c514d6e6a

                  SHA1

                  7dd8414b66ecf0f43a48a96ae35264f1a860ae9f

                  SHA256

                  8e1482107abf927934b653c390bb310a50a852af9e5c9c789f19a190228bef08

                  SHA512

                  f6426474e8e1e1fda088b15977e9b2eb282bd39832ccc42e0cb03dbb9f0ebcdb0e9c6f59be78e4e57f6ad789af0bfb4cc241d6e2bdcaa7cef4211f00ec55993c

                • \Windows\SysWOW64\nethtsrv.exe

                  Filesize

                  176KB

                  MD5

                  9e5fe89148026bd16918f1c3b033272f

                  SHA1

                  e68251af0d6194a755d4107506205df2700d8b92

                  SHA256

                  74254cd50dc582b82a631a9b5ddee7e520cf603071a8cf66a151c4726af88ddf

                  SHA512

                  a7e94520512a16e9e4c21518a590cc0b87a1ce80b5c9b95c34df25746217a2d22fae0259f9fa85ea6647c1ee37308edc18c388ecc824d79f557b663f70d4f6a2

                • \Windows\SysWOW64\netupdsrv.exe

                  Filesize

                  158KB

                  MD5

                  0502c3fcf5fcf1dfd0f7c980f5ce20ab

                  SHA1

                  95e86b011026843b42b63f2d62619aaaa37cad1d

                  SHA256

                  a69006d5030058d25b2b0aca4d13e1acb1523a14be16324f80dc958e745b7cca

                  SHA512

                  5e73d64786dd5425c56c339b07dff31532c2dc20820909e9a4511f2655c42d3f40b67bc405ff596d86ee34b0d176e89af78570fc46c540c1dd122a170ea8127e

                • memory/1232-91-0x0000000000350000-0x00000000007BE000-memory.dmp

                  Filesize

                  4.4MB

                • memory/1232-69-0x0000000000350000-0x00000000007BE000-memory.dmp

                  Filesize

                  4.4MB

                • memory/1232-54-0x0000000076041000-0x0000000076043000-memory.dmp

                  Filesize

                  8KB

                • memory/1232-59-0x0000000000350000-0x00000000007BE000-memory.dmp

                  Filesize

                  4.4MB