Analysis

  • max time kernel
    48s
  • max time network
    53s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:13

General

  • Target

    bf11f43611f8219a2b3d5b4528818a12b023652812bb2e25d194945be5151924.exe

  • Size

    602KB

  • MD5

    e99707d19eebc66231247a759c07036f

  • SHA1

    c51875bbd964547286350be12a3613d923f99005

  • SHA256

    bf11f43611f8219a2b3d5b4528818a12b023652812bb2e25d194945be5151924

  • SHA512

    8da6a7a9cede2f8ee2a6b3234bdbe6a90ad43ebe12f82c25284a08ab6145f32054cd5fac808facf5197280097b43ce3555f2b01c75bcabb9f5e54b68e3c65668

  • SSDEEP

    12288:1Iny5DYTuUBxnuIlYrHs1g8/1QvKnuMXEVhX7:BUTuiqH58XGr

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\bf11f43611f8219a2b3d5b4528818a12b023652812bb2e25d194945be5151924.exe
    "C:\Users\Admin\AppData\Local\Temp\bf11f43611f8219a2b3d5b4528818a12b023652812bb2e25d194945be5151924.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:1364
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1932
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:988
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1248
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:472
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1220
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1652
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1604
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1640
        • C:\Windows\SysWOW64\net.exe
          net start serviceupdater
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1688
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start serviceupdater
            3⤵
              PID:1908
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 start nethttpservice
          1⤵
            PID:2028
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:2008
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1300

          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

            5eef2796c4385152ef0de4093a139b9f

            SHA1

            fa903b4405aad1cf94a057b728139c9fc8ffe27d

            SHA256

            fb325c84cc7d0d04a5723afd417560fa549c445b92bec34ba39051147efb276b

            SHA512

            99b136d94d15ae2f1d3a5261b720bce17e2e7bc600af9a94cc29d9d7db2d806bf59c3e767a893e3404d3a52de67570995c714f76975eac2c3199d7b780cb9aeb

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

            241KB

            MD5

            5b3078350e1590e84989cd447d36946d

            SHA1

            8d8e1d3668d84ee28d0eaadfca11276a67ee67a3

            SHA256

            3dec47ca6ed1a9a0e78f16d904a96fc3962b46e4ade1e850d1bfa0b5adde24b7

            SHA512

            513a29cdea826e2fa50df3e076d0f306c84e58b91052dca37a80f764bac090db63aa0978ed9bf12df560399e4585cbb6986a95099f1d65cb52e4e0621fbdedce

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

            108KB

            MD5

            33417f4420c43c61f216e79942f4c72a

            SHA1

            2c4690f2df97db04e2c255ba0d12cc03ec3e287e

            SHA256

            820fbc285a20eeb39d891707920061a0cb20dc7b04336668d6e7179df0b3feff

            SHA512

            95c206ad5a490b95d2b576d42b6a6a4d9aaa6b0bcd5c52686939a06ff13ff331e108031f7b6ae926f0734390c5e90e1793c8d217a5b02d2091e4f34bf1459587

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

            176KB

            MD5

            96c73bbcf81a1054b42a56aed10592de

            SHA1

            d7998003ef34986a9f4899a2e6858e5fefe95bf1

            SHA256

            11544ec3d093cc8b7eabe644a7aae2f18255b6b3460428e391f10b6bd0b4b639

            SHA512

            4a1aa0f1240c82558141cbf62cf1cbd1593855546a286da9586120cd8e25201e0a64fdfd027c44b7cd52fe543c7ca122d885a8af5b9ca97bc188b9e2d7d48137

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

            176KB

            MD5

            96c73bbcf81a1054b42a56aed10592de

            SHA1

            d7998003ef34986a9f4899a2e6858e5fefe95bf1

            SHA256

            11544ec3d093cc8b7eabe644a7aae2f18255b6b3460428e391f10b6bd0b4b639

            SHA512

            4a1aa0f1240c82558141cbf62cf1cbd1593855546a286da9586120cd8e25201e0a64fdfd027c44b7cd52fe543c7ca122d885a8af5b9ca97bc188b9e2d7d48137

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

            159KB

            MD5

            9be52bc963017e8b8fb9c854b1803883

            SHA1

            9094ee54afb42a3c1e6fb992c021cb316a6e4b4c

            SHA256

            88631b3294a9751cbd47f5d04602338763e7b526b8c4bb7b1187b62179c00f55

            SHA512

            611d8b3f2d3f5764430b06072e87339d0ef47825b3c6e02523481bfabe0ebc169855560d46549b10c494ce46324347473bce32ebb8554f5f54b85fd612d4f5ee

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

            159KB

            MD5

            9be52bc963017e8b8fb9c854b1803883

            SHA1

            9094ee54afb42a3c1e6fb992c021cb316a6e4b4c

            SHA256

            88631b3294a9751cbd47f5d04602338763e7b526b8c4bb7b1187b62179c00f55

            SHA512

            611d8b3f2d3f5764430b06072e87339d0ef47825b3c6e02523481bfabe0ebc169855560d46549b10c494ce46324347473bce32ebb8554f5f54b85fd612d4f5ee

          • \Users\Admin\AppData\Local\Temp\nsj366F.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsj366F.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsj366F.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsj366F.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsj366F.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            5eef2796c4385152ef0de4093a139b9f

            SHA1

            fa903b4405aad1cf94a057b728139c9fc8ffe27d

            SHA256

            fb325c84cc7d0d04a5723afd417560fa549c445b92bec34ba39051147efb276b

            SHA512

            99b136d94d15ae2f1d3a5261b720bce17e2e7bc600af9a94cc29d9d7db2d806bf59c3e767a893e3404d3a52de67570995c714f76975eac2c3199d7b780cb9aeb

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            5eef2796c4385152ef0de4093a139b9f

            SHA1

            fa903b4405aad1cf94a057b728139c9fc8ffe27d

            SHA256

            fb325c84cc7d0d04a5723afd417560fa549c445b92bec34ba39051147efb276b

            SHA512

            99b136d94d15ae2f1d3a5261b720bce17e2e7bc600af9a94cc29d9d7db2d806bf59c3e767a893e3404d3a52de67570995c714f76975eac2c3199d7b780cb9aeb

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            5eef2796c4385152ef0de4093a139b9f

            SHA1

            fa903b4405aad1cf94a057b728139c9fc8ffe27d

            SHA256

            fb325c84cc7d0d04a5723afd417560fa549c445b92bec34ba39051147efb276b

            SHA512

            99b136d94d15ae2f1d3a5261b720bce17e2e7bc600af9a94cc29d9d7db2d806bf59c3e767a893e3404d3a52de67570995c714f76975eac2c3199d7b780cb9aeb

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            5b3078350e1590e84989cd447d36946d

            SHA1

            8d8e1d3668d84ee28d0eaadfca11276a67ee67a3

            SHA256

            3dec47ca6ed1a9a0e78f16d904a96fc3962b46e4ade1e850d1bfa0b5adde24b7

            SHA512

            513a29cdea826e2fa50df3e076d0f306c84e58b91052dca37a80f764bac090db63aa0978ed9bf12df560399e4585cbb6986a95099f1d65cb52e4e0621fbdedce

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            5b3078350e1590e84989cd447d36946d

            SHA1

            8d8e1d3668d84ee28d0eaadfca11276a67ee67a3

            SHA256

            3dec47ca6ed1a9a0e78f16d904a96fc3962b46e4ade1e850d1bfa0b5adde24b7

            SHA512

            513a29cdea826e2fa50df3e076d0f306c84e58b91052dca37a80f764bac090db63aa0978ed9bf12df560399e4585cbb6986a95099f1d65cb52e4e0621fbdedce

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            33417f4420c43c61f216e79942f4c72a

            SHA1

            2c4690f2df97db04e2c255ba0d12cc03ec3e287e

            SHA256

            820fbc285a20eeb39d891707920061a0cb20dc7b04336668d6e7179df0b3feff

            SHA512

            95c206ad5a490b95d2b576d42b6a6a4d9aaa6b0bcd5c52686939a06ff13ff331e108031f7b6ae926f0734390c5e90e1793c8d217a5b02d2091e4f34bf1459587

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            96c73bbcf81a1054b42a56aed10592de

            SHA1

            d7998003ef34986a9f4899a2e6858e5fefe95bf1

            SHA256

            11544ec3d093cc8b7eabe644a7aae2f18255b6b3460428e391f10b6bd0b4b639

            SHA512

            4a1aa0f1240c82558141cbf62cf1cbd1593855546a286da9586120cd8e25201e0a64fdfd027c44b7cd52fe543c7ca122d885a8af5b9ca97bc188b9e2d7d48137

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            159KB

            MD5

            9be52bc963017e8b8fb9c854b1803883

            SHA1

            9094ee54afb42a3c1e6fb992c021cb316a6e4b4c

            SHA256

            88631b3294a9751cbd47f5d04602338763e7b526b8c4bb7b1187b62179c00f55

            SHA512

            611d8b3f2d3f5764430b06072e87339d0ef47825b3c6e02523481bfabe0ebc169855560d46549b10c494ce46324347473bce32ebb8554f5f54b85fd612d4f5ee

          • memory/472-62-0x0000000000000000-mapping.dmp
          • memory/988-59-0x0000000000000000-mapping.dmp
          • memory/1220-64-0x0000000000000000-mapping.dmp
          • memory/1248-61-0x0000000000000000-mapping.dmp
          • memory/1364-54-0x0000000075091000-0x0000000075093000-memory.dmp
            Filesize

            8KB

          • memory/1364-58-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1364-90-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1604-76-0x0000000000000000-mapping.dmp
          • memory/1640-80-0x0000000000000000-mapping.dmp
          • memory/1652-70-0x0000000000000000-mapping.dmp
          • memory/1688-86-0x0000000000000000-mapping.dmp
          • memory/1908-87-0x0000000000000000-mapping.dmp
          • memory/1932-57-0x0000000000000000-mapping.dmp
          • memory/2028-81-0x0000000000000000-mapping.dmp