Analysis

  • max time kernel
    61s
  • 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 10:16

General

  • Target

    a541ce7a805fc89388a0f853beb3cc6ebc0a7d0f4b81670bf44da65b5237af12.exe

  • Size

    601KB

  • MD5

    c3aecdf44a8a5a9bd118bf28f84b93a0

  • SHA1

    6a8eada7a28df40fcd8d262a47911c11c187c699

  • SHA256

    a541ce7a805fc89388a0f853beb3cc6ebc0a7d0f4b81670bf44da65b5237af12

  • SHA512

    ecc98db9380aa8737e5f3444c30afc5a8cbbc912681f08670975c9d0278c12eec353bb01af8b42a38e795fd74e650a498d38d7d0a13d835276e59bd82e388218

  • SSDEEP

    12288:wIny5DYTgsM2lbvNSq5YS9aY2D0o8LHKRCSILJ8u4v:OUTg6nNB9e8LHSO0v

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\a541ce7a805fc89388a0f853beb3cc6ebc0a7d0f4b81670bf44da65b5237af12.exe
    "C:\Users\Admin\AppData\Local\Temp\a541ce7a805fc89388a0f853beb3cc6ebc0a7d0f4b81670bf44da65b5237af12.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:1668
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:932
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1636
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:680
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:916
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:808
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1364
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1992
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1040
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1420
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:780
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:848
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1048
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:520

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            55624fc42b040f6c9fe30f7c484b9d31

            SHA1

            3f8fc0b3fc5a85bf40c7d912c1113f032f33c0e6

            SHA256

            1c4858d6c49ad74fb868654c86f2d950b1c679c05494d249209bcb6ee29650e8

            SHA512

            da6d2ea5730dc8107ba413f2e3f98fa29f11596f373b3c82a56b35fe1681337b5bb9aa1e554cc62b3b99dfebeada357d7a2e74f01965f88e6cd29f2facd628d7

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            98cfbb301a015cca97ad55e631101f18

            SHA1

            75d74535ed112596160c719218005584007b39ff

            SHA256

            3ad371f6ca191c630d6b91a26cdbebcbb5c39426983e65a6569a1de4bcdededc

            SHA512

            630650c7eb6242d32b45b9954d2f8b9dcc23ed34b1125e11a86b742d4cbaa47db22e19a1989bdcdc08461c14be4d96825a35c53569df54406564f97b2c614458

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            c56c10f5a97652efde59c28feeecd86c

            SHA1

            2cd4bf6d5dba89fede597ec72cb5654d3d484335

            SHA256

            e505b3f5e2b6b2b0b16c2929ff7664d0ab9ce3d604779cd50db702602b70270f

            SHA512

            697c35f9545c41a4e42dd81b7cfb6e0c63ea7510e04e77606d77ad10d3dc88233e4f663bfc420539845488e6ff31fcab3f61d7ae8abac270c2baacbad8462943

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            4f050f67e72728791f69109d15c9963d

            SHA1

            ec9c54420395ea2ebfb139206c5a5d3103a1956f

            SHA256

            7c0a08f31b38599e3b0f985fa4c453fcbdc11ba0f2f345bf856abf66a3b802ad

            SHA512

            ea3ac584434fd2d19dce51f2f3dcd1cb9b33e1b27f4f54e37b6538f0ee685f99843698a898932e68d06b38a9472518549d47a151e8146eb25f237eab47d8cfa9

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            4f050f67e72728791f69109d15c9963d

            SHA1

            ec9c54420395ea2ebfb139206c5a5d3103a1956f

            SHA256

            7c0a08f31b38599e3b0f985fa4c453fcbdc11ba0f2f345bf856abf66a3b802ad

            SHA512

            ea3ac584434fd2d19dce51f2f3dcd1cb9b33e1b27f4f54e37b6538f0ee685f99843698a898932e68d06b38a9472518549d47a151e8146eb25f237eab47d8cfa9

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            5782966eb1cc40eabb2916b64a00c1c4

            SHA1

            6e5b7d28c025cdc4c82f33f1ba4a54a27ca56ce1

            SHA256

            089e8bd0d6328f51709de9cfdc1e9da56429b34ad7a1e6f96e159bef03fb66a6

            SHA512

            e1cb919fb018249f8892b075f5d70effe545adea4e6063bcc5893a8958a63160309eaa5c561b6378f72906554d42c957fbdf073bf17e7fb24887676861200dfc

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            5782966eb1cc40eabb2916b64a00c1c4

            SHA1

            6e5b7d28c025cdc4c82f33f1ba4a54a27ca56ce1

            SHA256

            089e8bd0d6328f51709de9cfdc1e9da56429b34ad7a1e6f96e159bef03fb66a6

            SHA512

            e1cb919fb018249f8892b075f5d70effe545adea4e6063bcc5893a8958a63160309eaa5c561b6378f72906554d42c957fbdf073bf17e7fb24887676861200dfc

          • \Users\Admin\AppData\Local\Temp\nsy9B68.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsy9B68.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy9B68.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy9B68.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsy9B68.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            55624fc42b040f6c9fe30f7c484b9d31

            SHA1

            3f8fc0b3fc5a85bf40c7d912c1113f032f33c0e6

            SHA256

            1c4858d6c49ad74fb868654c86f2d950b1c679c05494d249209bcb6ee29650e8

            SHA512

            da6d2ea5730dc8107ba413f2e3f98fa29f11596f373b3c82a56b35fe1681337b5bb9aa1e554cc62b3b99dfebeada357d7a2e74f01965f88e6cd29f2facd628d7

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            55624fc42b040f6c9fe30f7c484b9d31

            SHA1

            3f8fc0b3fc5a85bf40c7d912c1113f032f33c0e6

            SHA256

            1c4858d6c49ad74fb868654c86f2d950b1c679c05494d249209bcb6ee29650e8

            SHA512

            da6d2ea5730dc8107ba413f2e3f98fa29f11596f373b3c82a56b35fe1681337b5bb9aa1e554cc62b3b99dfebeada357d7a2e74f01965f88e6cd29f2facd628d7

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            55624fc42b040f6c9fe30f7c484b9d31

            SHA1

            3f8fc0b3fc5a85bf40c7d912c1113f032f33c0e6

            SHA256

            1c4858d6c49ad74fb868654c86f2d950b1c679c05494d249209bcb6ee29650e8

            SHA512

            da6d2ea5730dc8107ba413f2e3f98fa29f11596f373b3c82a56b35fe1681337b5bb9aa1e554cc62b3b99dfebeada357d7a2e74f01965f88e6cd29f2facd628d7

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            98cfbb301a015cca97ad55e631101f18

            SHA1

            75d74535ed112596160c719218005584007b39ff

            SHA256

            3ad371f6ca191c630d6b91a26cdbebcbb5c39426983e65a6569a1de4bcdededc

            SHA512

            630650c7eb6242d32b45b9954d2f8b9dcc23ed34b1125e11a86b742d4cbaa47db22e19a1989bdcdc08461c14be4d96825a35c53569df54406564f97b2c614458

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            98cfbb301a015cca97ad55e631101f18

            SHA1

            75d74535ed112596160c719218005584007b39ff

            SHA256

            3ad371f6ca191c630d6b91a26cdbebcbb5c39426983e65a6569a1de4bcdededc

            SHA512

            630650c7eb6242d32b45b9954d2f8b9dcc23ed34b1125e11a86b742d4cbaa47db22e19a1989bdcdc08461c14be4d96825a35c53569df54406564f97b2c614458

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            c56c10f5a97652efde59c28feeecd86c

            SHA1

            2cd4bf6d5dba89fede597ec72cb5654d3d484335

            SHA256

            e505b3f5e2b6b2b0b16c2929ff7664d0ab9ce3d604779cd50db702602b70270f

            SHA512

            697c35f9545c41a4e42dd81b7cfb6e0c63ea7510e04e77606d77ad10d3dc88233e4f663bfc420539845488e6ff31fcab3f61d7ae8abac270c2baacbad8462943

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            4f050f67e72728791f69109d15c9963d

            SHA1

            ec9c54420395ea2ebfb139206c5a5d3103a1956f

            SHA256

            7c0a08f31b38599e3b0f985fa4c453fcbdc11ba0f2f345bf856abf66a3b802ad

            SHA512

            ea3ac584434fd2d19dce51f2f3dcd1cb9b33e1b27f4f54e37b6538f0ee685f99843698a898932e68d06b38a9472518549d47a151e8146eb25f237eab47d8cfa9

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            5782966eb1cc40eabb2916b64a00c1c4

            SHA1

            6e5b7d28c025cdc4c82f33f1ba4a54a27ca56ce1

            SHA256

            089e8bd0d6328f51709de9cfdc1e9da56429b34ad7a1e6f96e159bef03fb66a6

            SHA512

            e1cb919fb018249f8892b075f5d70effe545adea4e6063bcc5893a8958a63160309eaa5c561b6378f72906554d42c957fbdf073bf17e7fb24887676861200dfc

          • memory/680-61-0x0000000000000000-mapping.dmp

          • memory/780-87-0x0000000000000000-mapping.dmp

          • memory/808-64-0x0000000000000000-mapping.dmp

          • memory/848-88-0x0000000000000000-mapping.dmp

          • memory/916-62-0x0000000000000000-mapping.dmp

          • memory/932-57-0x0000000000000000-mapping.dmp

          • memory/1040-81-0x0000000000000000-mapping.dmp

          • memory/1364-70-0x0000000000000000-mapping.dmp

          • memory/1420-82-0x0000000000000000-mapping.dmp

          • memory/1636-58-0x0000000000000000-mapping.dmp

          • memory/1668-75-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1668-54-0x0000000075C81000-0x0000000075C83000-memory.dmp

            Filesize

            8KB

          • memory/1668-59-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1668-91-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/1992-77-0x0000000000000000-mapping.dmp