Analysis

  • max time kernel
    43s
  • max time network
    48s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

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

General

  • Target

    cf23761c00599c73e3f0f24d755f181c22e9c6424dcdb3737b64b5a0911bc270.exe

  • Size

    602KB

  • MD5

    dff4dc95156f7ec606b2c6e00ce5f7bb

  • SHA1

    4691f1ca655f1a5b580005d85d773a0df3ff9a36

  • SHA256

    cf23761c00599c73e3f0f24d755f181c22e9c6424dcdb3737b64b5a0911bc270

  • SHA512

    dca4f229a3a62888e731d9a4ddf7a1f41b01825a5b7975df9f1711b5a342796a0053e10823bc695f0c371ecb17621d7a036558e814682323f7daf9d514a58ee3

  • SSDEEP

    12288:rIny5DYTcI6waRPpzao2ka7O8+GTga6EHNu8/xYznsOdkI:TUTcNvRPpeyWoIztu8/xYznsOd

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\cf23761c00599c73e3f0f24d755f181c22e9c6424dcdb3737b64b5a0911bc270.exe
    "C:\Users\Admin\AppData\Local\Temp\cf23761c00599c73e3f0f24d755f181c22e9c6424dcdb3737b64b5a0911bc270.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:1720
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1640
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1000
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:292
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1044
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1756
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:764
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1804
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1972
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:2024
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1544
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1108
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:960
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:2040

          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

            93e21764429136c65ec090ccf092196a

            SHA1

            44eb00fc02e17f17e59be6656c43a3ea774f49e0

            SHA256

            57049136a2ad474e2522939ab3b63b0d63672ab8b29d8e2de67450b69b31906b

            SHA512

            b1137b98855e74109304dda59543bc746e05e11ea2c507e7b98cb622fc5088e4b4979d07c346d5eaedf908a30885b44f5bbcf40fb9470185c7d95401fcba5a07

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

            244KB

            MD5

            5d4ba73d662c14d5cefa7ffd0d2fd63e

            SHA1

            ff7400a134a040d66cdce5584e0dbb31f61dd233

            SHA256

            4f998d89fbe446a3d73a44174878046c86faddef2cf3a68430e419654923738c

            SHA512

            eadc631e5abdf573443bfc90d58baeb77ca02d655b537335145e3708a5749554a4c6a73a3965634546f9b56081674a89c9fa82deb79041e19096c2dd9e93062a

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

            108KB

            MD5

            0c1206089a9b43b490346c9a92e53577

            SHA1

            2184c234caf3884db90764069f098eafc72d9b94

            SHA256

            1d88f015ef9956e18a751b40494aecb344ca8b5794fd0beba43f7da311295701

            SHA512

            1cff20b555fa0f04585f13b3aa09f73a95faf0553ea467b3090430464ab2f3ced2519b1ec711c031ec8aabef21f4720eab8a26dd1dd711866dd3c5dfffe429b0

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

            176KB

            MD5

            9e322cc910335aaddf15fd5295aac3f8

            SHA1

            56f6346b74de0fac6cfd2e8c1acfc1c80c6b5455

            SHA256

            9fd1e67fddaa7065f313eceddc5e3026d78a98fadd92a0611b1bab994f4ba62e

            SHA512

            ad8943956ad86b864582968f124b1ede59a8b51ea9fadc30a52b8af33e3124e1ed9de4ff758bef461ef3ef348f7601f88a29d134de97d3b05a4163e43bb1623a

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

            176KB

            MD5

            9e322cc910335aaddf15fd5295aac3f8

            SHA1

            56f6346b74de0fac6cfd2e8c1acfc1c80c6b5455

            SHA256

            9fd1e67fddaa7065f313eceddc5e3026d78a98fadd92a0611b1bab994f4ba62e

            SHA512

            ad8943956ad86b864582968f124b1ede59a8b51ea9fadc30a52b8af33e3124e1ed9de4ff758bef461ef3ef348f7601f88a29d134de97d3b05a4163e43bb1623a

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

            159KB

            MD5

            44e43634913a0909b66f27f3e4036b59

            SHA1

            7ece6e0f2f5a3e74aaabfc1c584a817adb8cad8f

            SHA256

            46bd81fa59f7d1dcbd817cf6e137786682d5a362de137360793f1164f96f34b6

            SHA512

            787b80b1e88985ac95eee00023039e1599afe9336c68714e7b4b6e3d8ad042146ee7b37aecd2b95dbf54cbd6c2a387ae9099e36e8cc6f873014820fbeb350e3e

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

            159KB

            MD5

            44e43634913a0909b66f27f3e4036b59

            SHA1

            7ece6e0f2f5a3e74aaabfc1c584a817adb8cad8f

            SHA256

            46bd81fa59f7d1dcbd817cf6e137786682d5a362de137360793f1164f96f34b6

            SHA512

            787b80b1e88985ac95eee00023039e1599afe9336c68714e7b4b6e3d8ad042146ee7b37aecd2b95dbf54cbd6c2a387ae9099e36e8cc6f873014820fbeb350e3e

          • \Users\Admin\AppData\Local\Temp\nsy20DC.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsy20DC.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy20DC.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy20DC.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy20DC.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            93e21764429136c65ec090ccf092196a

            SHA1

            44eb00fc02e17f17e59be6656c43a3ea774f49e0

            SHA256

            57049136a2ad474e2522939ab3b63b0d63672ab8b29d8e2de67450b69b31906b

            SHA512

            b1137b98855e74109304dda59543bc746e05e11ea2c507e7b98cb622fc5088e4b4979d07c346d5eaedf908a30885b44f5bbcf40fb9470185c7d95401fcba5a07

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            93e21764429136c65ec090ccf092196a

            SHA1

            44eb00fc02e17f17e59be6656c43a3ea774f49e0

            SHA256

            57049136a2ad474e2522939ab3b63b0d63672ab8b29d8e2de67450b69b31906b

            SHA512

            b1137b98855e74109304dda59543bc746e05e11ea2c507e7b98cb622fc5088e4b4979d07c346d5eaedf908a30885b44f5bbcf40fb9470185c7d95401fcba5a07

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            93e21764429136c65ec090ccf092196a

            SHA1

            44eb00fc02e17f17e59be6656c43a3ea774f49e0

            SHA256

            57049136a2ad474e2522939ab3b63b0d63672ab8b29d8e2de67450b69b31906b

            SHA512

            b1137b98855e74109304dda59543bc746e05e11ea2c507e7b98cb622fc5088e4b4979d07c346d5eaedf908a30885b44f5bbcf40fb9470185c7d95401fcba5a07

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            244KB

            MD5

            5d4ba73d662c14d5cefa7ffd0d2fd63e

            SHA1

            ff7400a134a040d66cdce5584e0dbb31f61dd233

            SHA256

            4f998d89fbe446a3d73a44174878046c86faddef2cf3a68430e419654923738c

            SHA512

            eadc631e5abdf573443bfc90d58baeb77ca02d655b537335145e3708a5749554a4c6a73a3965634546f9b56081674a89c9fa82deb79041e19096c2dd9e93062a

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            244KB

            MD5

            5d4ba73d662c14d5cefa7ffd0d2fd63e

            SHA1

            ff7400a134a040d66cdce5584e0dbb31f61dd233

            SHA256

            4f998d89fbe446a3d73a44174878046c86faddef2cf3a68430e419654923738c

            SHA512

            eadc631e5abdf573443bfc90d58baeb77ca02d655b537335145e3708a5749554a4c6a73a3965634546f9b56081674a89c9fa82deb79041e19096c2dd9e93062a

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            0c1206089a9b43b490346c9a92e53577

            SHA1

            2184c234caf3884db90764069f098eafc72d9b94

            SHA256

            1d88f015ef9956e18a751b40494aecb344ca8b5794fd0beba43f7da311295701

            SHA512

            1cff20b555fa0f04585f13b3aa09f73a95faf0553ea467b3090430464ab2f3ced2519b1ec711c031ec8aabef21f4720eab8a26dd1dd711866dd3c5dfffe429b0

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            9e322cc910335aaddf15fd5295aac3f8

            SHA1

            56f6346b74de0fac6cfd2e8c1acfc1c80c6b5455

            SHA256

            9fd1e67fddaa7065f313eceddc5e3026d78a98fadd92a0611b1bab994f4ba62e

            SHA512

            ad8943956ad86b864582968f124b1ede59a8b51ea9fadc30a52b8af33e3124e1ed9de4ff758bef461ef3ef348f7601f88a29d134de97d3b05a4163e43bb1623a

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            159KB

            MD5

            44e43634913a0909b66f27f3e4036b59

            SHA1

            7ece6e0f2f5a3e74aaabfc1c584a817adb8cad8f

            SHA256

            46bd81fa59f7d1dcbd817cf6e137786682d5a362de137360793f1164f96f34b6

            SHA512

            787b80b1e88985ac95eee00023039e1599afe9336c68714e7b4b6e3d8ad042146ee7b37aecd2b95dbf54cbd6c2a387ae9099e36e8cc6f873014820fbeb350e3e

          • memory/292-61-0x0000000000000000-mapping.dmp
          • memory/764-70-0x0000000000000000-mapping.dmp
          • memory/1000-58-0x0000000000000000-mapping.dmp
          • memory/1044-62-0x0000000000000000-mapping.dmp
          • memory/1108-87-0x0000000000000000-mapping.dmp
          • memory/1544-86-0x0000000000000000-mapping.dmp
          • memory/1640-57-0x0000000000000000-mapping.dmp
          • memory/1720-54-0x00000000765B1000-0x00000000765B3000-memory.dmp
            Filesize

            8KB

          • memory/1720-59-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1720-90-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1756-64-0x0000000000000000-mapping.dmp
          • memory/1804-76-0x0000000000000000-mapping.dmp
          • memory/1972-80-0x0000000000000000-mapping.dmp
          • memory/2024-81-0x0000000000000000-mapping.dmp