Analysis

  • max time kernel
    84s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:21

General

  • Target

    81da5583552f6e556413cc22d788a5248f53e5735d2b71f4fcf5397f4d451ead.exe

  • Size

    603KB

  • MD5

    a1e07b94735cfe4803e2bc92e6da4a13

  • SHA1

    87afaca0d0190f629f458c3fbaf9f6e3af33e01c

  • SHA256

    81da5583552f6e556413cc22d788a5248f53e5735d2b71f4fcf5397f4d451ead

  • SHA512

    3b745dba4f5ab45cd318fa1c009273ba232291f98010452ed49c21f7ed265c98b4aff90491e0b3473b80d0a37ede2f2b624dd170d744b2eb10e2b87ece5fe48d

  • SSDEEP

    12288:6Iny5DYTmIJPXihPRN/r2txmdw6KKhTJhkfOMOBAAH3SXAP8b:cUTmuPPgw7KThkfOMYlgAP8b

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\81da5583552f6e556413cc22d788a5248f53e5735d2b71f4fcf5397f4d451ead.exe
    "C:\Users\Admin\AppData\Local\Temp\81da5583552f6e556413cc22d788a5248f53e5735d2b71f4fcf5397f4d451ead.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:832
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2028
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:564
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:268
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:2036
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1224
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1568
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1520
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:964
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1472
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1992
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1064
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:484
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:880

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            f114de71ae908933705d812d0691884e

            SHA1

            931f32a73449f8a0612691d6bcabdbfa19a6df9b

            SHA256

            a3088e7def6c20fa2457aa82b1596ef2998ce9922c2690ed73dd214d62d67ffe

            SHA512

            50412b983b0ef676ba3ddffa72bc0b678b2b9a48c7e9ab901354a783b2d46a1a49a244a009eed40fc13a317f60b01783d7c8fdd79e5c1bcd9610c4bb478f3d36

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            ff00551f30c6d3192aabac2b7a4035e6

            SHA1

            428b1d5691d4fe2e98269838cb85f2a2064cd902

            SHA256

            87ec788e24343156f5242684e6d429651138945cf5fff490dcd9f908d818e048

            SHA512

            35a989a22d3932497b5ba1c19c8a1f7320a6693f95c224fcc2cef00ff808c68a8e3ee21c7efdc378ef641e269b391c04f77b419c7abd413e6932b1035179927a

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            78d2bd7648f5d38e4f4fb54c7f92a845

            SHA1

            87d00ec7bb365af3cf6d1ebb9d504aae513f1d12

            SHA256

            35939df4461bb07e5b167e1aa4176c6f5ff1e54ee8807173ea85d3f2fa629bcd

            SHA512

            da14e0d84e106649ff1c9abafe23123810fa7b84745b7b748bd26f2e9a52afc867b6ffcd6068df36d06f9460d50a383fd94b9b76b3f341d6feb3d3c1b3aef7f6

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            168ef22f6d6a12bbd80261fde283b63d

            SHA1

            aca207a15c4eacb86e230158b6d304cd909ec746

            SHA256

            140745c827d167ddcaf66d8fb42ddd656cf87f8aac2193d3b53dfe5892ac9064

            SHA512

            058deb06a8456f60ec8647a78b22ff1fb013fea7d83d8dd6aa925297ed6de2ac2d471b2c81708581c20aa3101750d45f8a834da50590fffc6fb7a14bed7149fd

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            168ef22f6d6a12bbd80261fde283b63d

            SHA1

            aca207a15c4eacb86e230158b6d304cd909ec746

            SHA256

            140745c827d167ddcaf66d8fb42ddd656cf87f8aac2193d3b53dfe5892ac9064

            SHA512

            058deb06a8456f60ec8647a78b22ff1fb013fea7d83d8dd6aa925297ed6de2ac2d471b2c81708581c20aa3101750d45f8a834da50590fffc6fb7a14bed7149fd

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            a71e3c7d017f4bdf6934fd2473085b6c

            SHA1

            5ea7c9f41d79c907b90b4d0b5a5de623e7e33ac7

            SHA256

            f38e739cafc091e7e540b4101ed36c43dccbca4d41df538666d533998adbfa0b

            SHA512

            0fbde2a182cbb4da53ac2cf7963e989e91dce03a1178ee7ca912a6eff7db0b56f76c56e914cb7f90ce29103bad7861c506cedc77b901a1432af6c9fd6d85d187

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            a71e3c7d017f4bdf6934fd2473085b6c

            SHA1

            5ea7c9f41d79c907b90b4d0b5a5de623e7e33ac7

            SHA256

            f38e739cafc091e7e540b4101ed36c43dccbca4d41df538666d533998adbfa0b

            SHA512

            0fbde2a182cbb4da53ac2cf7963e989e91dce03a1178ee7ca912a6eff7db0b56f76c56e914cb7f90ce29103bad7861c506cedc77b901a1432af6c9fd6d85d187

          • \Users\Admin\AppData\Local\Temp\nseACD6.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nseACD6.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nseACD6.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nseACD6.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nseACD6.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            f114de71ae908933705d812d0691884e

            SHA1

            931f32a73449f8a0612691d6bcabdbfa19a6df9b

            SHA256

            a3088e7def6c20fa2457aa82b1596ef2998ce9922c2690ed73dd214d62d67ffe

            SHA512

            50412b983b0ef676ba3ddffa72bc0b678b2b9a48c7e9ab901354a783b2d46a1a49a244a009eed40fc13a317f60b01783d7c8fdd79e5c1bcd9610c4bb478f3d36

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            f114de71ae908933705d812d0691884e

            SHA1

            931f32a73449f8a0612691d6bcabdbfa19a6df9b

            SHA256

            a3088e7def6c20fa2457aa82b1596ef2998ce9922c2690ed73dd214d62d67ffe

            SHA512

            50412b983b0ef676ba3ddffa72bc0b678b2b9a48c7e9ab901354a783b2d46a1a49a244a009eed40fc13a317f60b01783d7c8fdd79e5c1bcd9610c4bb478f3d36

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            f114de71ae908933705d812d0691884e

            SHA1

            931f32a73449f8a0612691d6bcabdbfa19a6df9b

            SHA256

            a3088e7def6c20fa2457aa82b1596ef2998ce9922c2690ed73dd214d62d67ffe

            SHA512

            50412b983b0ef676ba3ddffa72bc0b678b2b9a48c7e9ab901354a783b2d46a1a49a244a009eed40fc13a317f60b01783d7c8fdd79e5c1bcd9610c4bb478f3d36

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            ff00551f30c6d3192aabac2b7a4035e6

            SHA1

            428b1d5691d4fe2e98269838cb85f2a2064cd902

            SHA256

            87ec788e24343156f5242684e6d429651138945cf5fff490dcd9f908d818e048

            SHA512

            35a989a22d3932497b5ba1c19c8a1f7320a6693f95c224fcc2cef00ff808c68a8e3ee21c7efdc378ef641e269b391c04f77b419c7abd413e6932b1035179927a

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            244KB

            MD5

            ff00551f30c6d3192aabac2b7a4035e6

            SHA1

            428b1d5691d4fe2e98269838cb85f2a2064cd902

            SHA256

            87ec788e24343156f5242684e6d429651138945cf5fff490dcd9f908d818e048

            SHA512

            35a989a22d3932497b5ba1c19c8a1f7320a6693f95c224fcc2cef00ff808c68a8e3ee21c7efdc378ef641e269b391c04f77b419c7abd413e6932b1035179927a

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            78d2bd7648f5d38e4f4fb54c7f92a845

            SHA1

            87d00ec7bb365af3cf6d1ebb9d504aae513f1d12

            SHA256

            35939df4461bb07e5b167e1aa4176c6f5ff1e54ee8807173ea85d3f2fa629bcd

            SHA512

            da14e0d84e106649ff1c9abafe23123810fa7b84745b7b748bd26f2e9a52afc867b6ffcd6068df36d06f9460d50a383fd94b9b76b3f341d6feb3d3c1b3aef7f6

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            168ef22f6d6a12bbd80261fde283b63d

            SHA1

            aca207a15c4eacb86e230158b6d304cd909ec746

            SHA256

            140745c827d167ddcaf66d8fb42ddd656cf87f8aac2193d3b53dfe5892ac9064

            SHA512

            058deb06a8456f60ec8647a78b22ff1fb013fea7d83d8dd6aa925297ed6de2ac2d471b2c81708581c20aa3101750d45f8a834da50590fffc6fb7a14bed7149fd

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            158KB

            MD5

            a71e3c7d017f4bdf6934fd2473085b6c

            SHA1

            5ea7c9f41d79c907b90b4d0b5a5de623e7e33ac7

            SHA256

            f38e739cafc091e7e540b4101ed36c43dccbca4d41df538666d533998adbfa0b

            SHA512

            0fbde2a182cbb4da53ac2cf7963e989e91dce03a1178ee7ca912a6eff7db0b56f76c56e914cb7f90ce29103bad7861c506cedc77b901a1432af6c9fd6d85d187

          • memory/268-61-0x0000000000000000-mapping.dmp

          • memory/564-58-0x0000000000000000-mapping.dmp

          • memory/832-54-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

            Filesize

            8KB

          • memory/832-79-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/832-59-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/832-91-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/964-81-0x0000000000000000-mapping.dmp

          • memory/1064-88-0x0000000000000000-mapping.dmp

          • memory/1224-64-0x0000000000000000-mapping.dmp

          • memory/1472-82-0x0000000000000000-mapping.dmp

          • memory/1520-76-0x0000000000000000-mapping.dmp

          • memory/1568-70-0x0000000000000000-mapping.dmp

          • memory/1992-87-0x0000000000000000-mapping.dmp

          • memory/2028-57-0x0000000000000000-mapping.dmp

          • memory/2036-62-0x0000000000000000-mapping.dmp