Analysis

  • max time kernel
    48s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:07

General

  • Target

    f3d819c88b12186a1cd2b702ccbef758ea9b7995e1cc2faf2c722e5c89562559.exe

  • Size

    602KB

  • MD5

    99a15d135b09ca74571a70be3ed80a04

  • SHA1

    42045cca30b57a42cafa45ed8e643128d0ee86b1

  • SHA256

    f3d819c88b12186a1cd2b702ccbef758ea9b7995e1cc2faf2c722e5c89562559

  • SHA512

    06856c3e30cb0d68a2d86a61b9a61cab7fc6c608c1505f57f5c935586897c30099b0c4bafde262afbf865ca5b4dd168a23db1cc0db64c91c2747cf002e5375fd

  • SSDEEP

    12288:/Iny5DYTZIspwUtOSAghYrKHO2YWE+e3zKd60UDIkgkxT/H4kDC5:nUTZjp3ZbhnHcWKzKd60UD9gkv4l5

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\f3d819c88b12186a1cd2b702ccbef758ea9b7995e1cc2faf2c722e5c89562559.exe
    "C:\Users\Admin\AppData\Local\Temp\f3d819c88b12186a1cd2b702ccbef758ea9b7995e1cc2faf2c722e5c89562559.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:1472
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:320
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:672
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:588
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1820
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:608
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1680
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1924
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1288
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:556
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1004
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1804
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1876
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1308

          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

            fa6f3e35a889aa12ca110d268b0612e7

            SHA1

            6961be38b53ab4bc1eb7c0cb99da32ffde1d849c

            SHA256

            84afdeddae12646b767b63b1ba3d78529cf8b3944d68a1542809c6ef2f89b476

            SHA512

            f33058fbd4e9f96fcd905d984762fdb152e771e531c330a13f04f159aeef47656ca54308fe97739d2b64dc081a4017ba6e1271411368401f2904894780cfd86d

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

            241KB

            MD5

            f1f6066446f158c7ca7d212d69a893fc

            SHA1

            acafbdac752f3aa109d4d8e6fab9204dc415e6ec

            SHA256

            61e27be39c99f36cead1ad5fca63af4378fc79e9b8db3f44e96b9474f19b32e2

            SHA512

            503b35c549c4c864846d73e119e0798f51da9035d71b52ddf4dc8bc7aaef12c26806c1160ac1b4ac87f3e80a91c313f153888fd024a9bb42daa0b0e1a21d3cba

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

            108KB

            MD5

            b7784bc519d030ba00838e09e62731cb

            SHA1

            c8d27335b378eb59ed256c3d4196fe5ff694bd0b

            SHA256

            11b8c01620d370725b8bdb9e24653676b834f661f3a59bb597627c7f325f55cb

            SHA512

            80ceb9bf6ed540abf42f0c89be2df433a579234daaecf5f58907652f96ae2c3cfac7e3ddcc0eea5fe9c63cb66936612e72c815a709bba7610e0d3ad988a04fec

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

            176KB

            MD5

            5d939a96410a5732f434165106e3e4c2

            SHA1

            3f98a875f1e1bece51020b29a7a2b8f53e248af2

            SHA256

            af7266fa1a371ce444af16ac4752ad3b7a551189ec8e684469423b3dc22220b8

            SHA512

            b539ff35cd6d111f132b74f4f59663253fe204932b6ac7e27d8c23d76b3b21209186919da344982c256cfcfa0edda17e0cf17498cfb4947382acd573006b59b1

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

            176KB

            MD5

            5d939a96410a5732f434165106e3e4c2

            SHA1

            3f98a875f1e1bece51020b29a7a2b8f53e248af2

            SHA256

            af7266fa1a371ce444af16ac4752ad3b7a551189ec8e684469423b3dc22220b8

            SHA512

            b539ff35cd6d111f132b74f4f59663253fe204932b6ac7e27d8c23d76b3b21209186919da344982c256cfcfa0edda17e0cf17498cfb4947382acd573006b59b1

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

            158KB

            MD5

            ea661a33988240cda0db7338be6556d7

            SHA1

            db983fb2cd1f2841e1bd5424946c400d682b41c5

            SHA256

            d5092f83319dc36f895efdae88260f6a0164e09d79b3f3efdc0e98732d0291f2

            SHA512

            e71eff619363ecc84b453dc9a4c06b39ce7a2be5f93748496ec3b1b4fa1e361649bd8a871c051eb05f93962cee7e2c4fa5acc2e90bb72b50233a4fa272205f22

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

            158KB

            MD5

            ea661a33988240cda0db7338be6556d7

            SHA1

            db983fb2cd1f2841e1bd5424946c400d682b41c5

            SHA256

            d5092f83319dc36f895efdae88260f6a0164e09d79b3f3efdc0e98732d0291f2

            SHA512

            e71eff619363ecc84b453dc9a4c06b39ce7a2be5f93748496ec3b1b4fa1e361649bd8a871c051eb05f93962cee7e2c4fa5acc2e90bb72b50233a4fa272205f22

          • \Users\Admin\AppData\Local\Temp\nsoB500.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsoB500.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsoB500.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsoB500.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsoB500.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            fa6f3e35a889aa12ca110d268b0612e7

            SHA1

            6961be38b53ab4bc1eb7c0cb99da32ffde1d849c

            SHA256

            84afdeddae12646b767b63b1ba3d78529cf8b3944d68a1542809c6ef2f89b476

            SHA512

            f33058fbd4e9f96fcd905d984762fdb152e771e531c330a13f04f159aeef47656ca54308fe97739d2b64dc081a4017ba6e1271411368401f2904894780cfd86d

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            fa6f3e35a889aa12ca110d268b0612e7

            SHA1

            6961be38b53ab4bc1eb7c0cb99da32ffde1d849c

            SHA256

            84afdeddae12646b767b63b1ba3d78529cf8b3944d68a1542809c6ef2f89b476

            SHA512

            f33058fbd4e9f96fcd905d984762fdb152e771e531c330a13f04f159aeef47656ca54308fe97739d2b64dc081a4017ba6e1271411368401f2904894780cfd86d

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            fa6f3e35a889aa12ca110d268b0612e7

            SHA1

            6961be38b53ab4bc1eb7c0cb99da32ffde1d849c

            SHA256

            84afdeddae12646b767b63b1ba3d78529cf8b3944d68a1542809c6ef2f89b476

            SHA512

            f33058fbd4e9f96fcd905d984762fdb152e771e531c330a13f04f159aeef47656ca54308fe97739d2b64dc081a4017ba6e1271411368401f2904894780cfd86d

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            f1f6066446f158c7ca7d212d69a893fc

            SHA1

            acafbdac752f3aa109d4d8e6fab9204dc415e6ec

            SHA256

            61e27be39c99f36cead1ad5fca63af4378fc79e9b8db3f44e96b9474f19b32e2

            SHA512

            503b35c549c4c864846d73e119e0798f51da9035d71b52ddf4dc8bc7aaef12c26806c1160ac1b4ac87f3e80a91c313f153888fd024a9bb42daa0b0e1a21d3cba

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            f1f6066446f158c7ca7d212d69a893fc

            SHA1

            acafbdac752f3aa109d4d8e6fab9204dc415e6ec

            SHA256

            61e27be39c99f36cead1ad5fca63af4378fc79e9b8db3f44e96b9474f19b32e2

            SHA512

            503b35c549c4c864846d73e119e0798f51da9035d71b52ddf4dc8bc7aaef12c26806c1160ac1b4ac87f3e80a91c313f153888fd024a9bb42daa0b0e1a21d3cba

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            b7784bc519d030ba00838e09e62731cb

            SHA1

            c8d27335b378eb59ed256c3d4196fe5ff694bd0b

            SHA256

            11b8c01620d370725b8bdb9e24653676b834f661f3a59bb597627c7f325f55cb

            SHA512

            80ceb9bf6ed540abf42f0c89be2df433a579234daaecf5f58907652f96ae2c3cfac7e3ddcc0eea5fe9c63cb66936612e72c815a709bba7610e0d3ad988a04fec

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            5d939a96410a5732f434165106e3e4c2

            SHA1

            3f98a875f1e1bece51020b29a7a2b8f53e248af2

            SHA256

            af7266fa1a371ce444af16ac4752ad3b7a551189ec8e684469423b3dc22220b8

            SHA512

            b539ff35cd6d111f132b74f4f59663253fe204932b6ac7e27d8c23d76b3b21209186919da344982c256cfcfa0edda17e0cf17498cfb4947382acd573006b59b1

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            ea661a33988240cda0db7338be6556d7

            SHA1

            db983fb2cd1f2841e1bd5424946c400d682b41c5

            SHA256

            d5092f83319dc36f895efdae88260f6a0164e09d79b3f3efdc0e98732d0291f2

            SHA512

            e71eff619363ecc84b453dc9a4c06b39ce7a2be5f93748496ec3b1b4fa1e361649bd8a871c051eb05f93962cee7e2c4fa5acc2e90bb72b50233a4fa272205f22

          • memory/320-57-0x0000000000000000-mapping.dmp
          • memory/556-82-0x0000000000000000-mapping.dmp
          • memory/588-61-0x0000000000000000-mapping.dmp
          • memory/608-64-0x0000000000000000-mapping.dmp
          • memory/672-58-0x0000000000000000-mapping.dmp
          • memory/1004-87-0x0000000000000000-mapping.dmp
          • memory/1288-81-0x0000000000000000-mapping.dmp
          • memory/1472-54-0x0000000075F21000-0x0000000075F23000-memory.dmp
            Filesize

            8KB

          • memory/1472-69-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1472-91-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1472-59-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1680-71-0x0000000000000000-mapping.dmp
          • memory/1804-88-0x0000000000000000-mapping.dmp
          • memory/1820-62-0x0000000000000000-mapping.dmp
          • memory/1924-77-0x0000000000000000-mapping.dmp