Analysis

  • max time kernel
    30s
  • max time network
    47s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:17

General

  • Target

    a4d8871cf0a19457e5e57c302cd199c9b5e392d8e83565774c24303109a48c92.exe

  • Size

    602KB

  • MD5

    7235cb23e40176a2151f09df675b6501

  • SHA1

    b22124ea317a1a2eb4d79330f11eb110678c787a

  • SHA256

    a4d8871cf0a19457e5e57c302cd199c9b5e392d8e83565774c24303109a48c92

  • SHA512

    5deaa6406f1ee81711933d5f0740a62e9813d74bb5da07c7cc2a50b5721d44f57abd9077daec55d60c9015a896e3a37b550f6361071f4ab238add5c3b7932b19

  • SSDEEP

    12288:BIny5DYTgyFuI+DIz5ZcWg+xpN0fLZqYbIFtZZuYRR8DU3onBFsM7vq8:9UTgyFj+INZcNwMfQ/F/M7S6yMrJ

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\a4d8871cf0a19457e5e57c302cd199c9b5e392d8e83565774c24303109a48c92.exe
    "C:\Users\Admin\AppData\Local\Temp\a4d8871cf0a19457e5e57c302cd199c9b5e392d8e83565774c24303109a48c92.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:900
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1940
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1980
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1964
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:964
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1840
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:276
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1468
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1660
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1812
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:360
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:692
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1516
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:308

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            3210332f89d201c6cc4d564a51ec49f0

            SHA1

            2d106d1ec2693dc6820c9508101f14ccdc1c6f16

            SHA256

            0b93c6c0c384d70ae614663037a074b9e9b989a20195af00d2849d46db9dda68

            SHA512

            acecefecfb15bcc2a326b14d219dd2a68811f3ee0b0116d9033a252951fb286bc78c9af0be9d063ebb4403dc04f4c3c0e149975efca44d8cd8b66837818e6088

          • C:\Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            10762cae0647dcc18fc2e98d12770bc0

            SHA1

            729fa396f8df99ff9accc7732b0a1a9c852fcb1e

            SHA256

            0bbc1103e4b77ac502648ad3b5cd6120c6c7dd3fcc25b70609b131aa80ff79c6

            SHA512

            6a9b9b87eb329af36980626254ecc2c353b6b9fea15c56ab017cad2448bdaad43a63d6a93a7af109fcc3f26966585ac09fc154f1c8b1733de7b97e9ca5a96f73

          • C:\Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            2f221d42b30f76ecef293e93492b1c0f

            SHA1

            c86cfa6fd7b86ed6dd5ccbc241b9c7e10d6f8243

            SHA256

            9be6f94327d6c274a41d9dee73d89defa42744d15ff6dbd6fde63017937c4109

            SHA512

            9082a57e7ef2b5688d308c02ba03f21d7fb099fe27dcda2ca08a0667a1a0d43ae65d427d64e00e3a56f0e089418a6a535078bfbd2aefd03f8324076d6391767b

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1f4e5700f544f424c43878a963a5af3d

            SHA1

            89f4a146a38846f38b21cb933c44fd7d0b2c0d72

            SHA256

            c39d1c498822b35e2d7fe5bbd2c56fd37770af24efe096ccff65601fbba685e9

            SHA512

            b80615bcaaa1360e8e05a431ffcd62090897534194409d766ec0c1351a0c44a8957b3c159761f9e8c042020dcde8d0fa81ddd3ae43bd2d399f6e1d6a2429a45c

          • C:\Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1f4e5700f544f424c43878a963a5af3d

            SHA1

            89f4a146a38846f38b21cb933c44fd7d0b2c0d72

            SHA256

            c39d1c498822b35e2d7fe5bbd2c56fd37770af24efe096ccff65601fbba685e9

            SHA512

            b80615bcaaa1360e8e05a431ffcd62090897534194409d766ec0c1351a0c44a8957b3c159761f9e8c042020dcde8d0fa81ddd3ae43bd2d399f6e1d6a2429a45c

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            1a44b8b9b090892dc6db9a57ab3e04a4

            SHA1

            246903068469285927bfa1291bfc058875a048f7

            SHA256

            32b25aab976064a49228cfa51c8a12ef283c3e250552dd09551a98063018e6a8

            SHA512

            154d2f4dcf6e913619e7baf717fee7f468b872e7a05184f79c0a941ade6168dd2f5dc1c0babe52f57584a4bff26231f1a0a0f5f770924ff4b44e9134a93b4182

          • C:\Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            1a44b8b9b090892dc6db9a57ab3e04a4

            SHA1

            246903068469285927bfa1291bfc058875a048f7

            SHA256

            32b25aab976064a49228cfa51c8a12ef283c3e250552dd09551a98063018e6a8

            SHA512

            154d2f4dcf6e913619e7baf717fee7f468b872e7a05184f79c0a941ade6168dd2f5dc1c0babe52f57584a4bff26231f1a0a0f5f770924ff4b44e9134a93b4182

          • \Users\Admin\AppData\Local\Temp\nsjAAD3.tmp\System.dll

            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsjAAD3.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsjAAD3.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsjAAD3.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsjAAD3.tmp\nsExec.dll

            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            3210332f89d201c6cc4d564a51ec49f0

            SHA1

            2d106d1ec2693dc6820c9508101f14ccdc1c6f16

            SHA256

            0b93c6c0c384d70ae614663037a074b9e9b989a20195af00d2849d46db9dda68

            SHA512

            acecefecfb15bcc2a326b14d219dd2a68811f3ee0b0116d9033a252951fb286bc78c9af0be9d063ebb4403dc04f4c3c0e149975efca44d8cd8b66837818e6088

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            3210332f89d201c6cc4d564a51ec49f0

            SHA1

            2d106d1ec2693dc6820c9508101f14ccdc1c6f16

            SHA256

            0b93c6c0c384d70ae614663037a074b9e9b989a20195af00d2849d46db9dda68

            SHA512

            acecefecfb15bcc2a326b14d219dd2a68811f3ee0b0116d9033a252951fb286bc78c9af0be9d063ebb4403dc04f4c3c0e149975efca44d8cd8b66837818e6088

          • \Windows\SysWOW64\hfnapi.dll

            Filesize

            106KB

            MD5

            3210332f89d201c6cc4d564a51ec49f0

            SHA1

            2d106d1ec2693dc6820c9508101f14ccdc1c6f16

            SHA256

            0b93c6c0c384d70ae614663037a074b9e9b989a20195af00d2849d46db9dda68

            SHA512

            acecefecfb15bcc2a326b14d219dd2a68811f3ee0b0116d9033a252951fb286bc78c9af0be9d063ebb4403dc04f4c3c0e149975efca44d8cd8b66837818e6088

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            10762cae0647dcc18fc2e98d12770bc0

            SHA1

            729fa396f8df99ff9accc7732b0a1a9c852fcb1e

            SHA256

            0bbc1103e4b77ac502648ad3b5cd6120c6c7dd3fcc25b70609b131aa80ff79c6

            SHA512

            6a9b9b87eb329af36980626254ecc2c353b6b9fea15c56ab017cad2448bdaad43a63d6a93a7af109fcc3f26966585ac09fc154f1c8b1733de7b97e9ca5a96f73

          • \Windows\SysWOW64\hfpapi.dll

            Filesize

            241KB

            MD5

            10762cae0647dcc18fc2e98d12770bc0

            SHA1

            729fa396f8df99ff9accc7732b0a1a9c852fcb1e

            SHA256

            0bbc1103e4b77ac502648ad3b5cd6120c6c7dd3fcc25b70609b131aa80ff79c6

            SHA512

            6a9b9b87eb329af36980626254ecc2c353b6b9fea15c56ab017cad2448bdaad43a63d6a93a7af109fcc3f26966585ac09fc154f1c8b1733de7b97e9ca5a96f73

          • \Windows\SysWOW64\installd.exe

            Filesize

            108KB

            MD5

            2f221d42b30f76ecef293e93492b1c0f

            SHA1

            c86cfa6fd7b86ed6dd5ccbc241b9c7e10d6f8243

            SHA256

            9be6f94327d6c274a41d9dee73d89defa42744d15ff6dbd6fde63017937c4109

            SHA512

            9082a57e7ef2b5688d308c02ba03f21d7fb099fe27dcda2ca08a0667a1a0d43ae65d427d64e00e3a56f0e089418a6a535078bfbd2aefd03f8324076d6391767b

          • \Windows\SysWOW64\nethtsrv.exe

            Filesize

            176KB

            MD5

            1f4e5700f544f424c43878a963a5af3d

            SHA1

            89f4a146a38846f38b21cb933c44fd7d0b2c0d72

            SHA256

            c39d1c498822b35e2d7fe5bbd2c56fd37770af24efe096ccff65601fbba685e9

            SHA512

            b80615bcaaa1360e8e05a431ffcd62090897534194409d766ec0c1351a0c44a8957b3c159761f9e8c042020dcde8d0fa81ddd3ae43bd2d399f6e1d6a2429a45c

          • \Windows\SysWOW64\netupdsrv.exe

            Filesize

            159KB

            MD5

            1a44b8b9b090892dc6db9a57ab3e04a4

            SHA1

            246903068469285927bfa1291bfc058875a048f7

            SHA256

            32b25aab976064a49228cfa51c8a12ef283c3e250552dd09551a98063018e6a8

            SHA512

            154d2f4dcf6e913619e7baf717fee7f468b872e7a05184f79c0a941ade6168dd2f5dc1c0babe52f57584a4bff26231f1a0a0f5f770924ff4b44e9134a93b4182

          • memory/276-70-0x0000000000000000-mapping.dmp

          • memory/360-86-0x0000000000000000-mapping.dmp

          • memory/692-87-0x0000000000000000-mapping.dmp

          • memory/900-54-0x0000000075571000-0x0000000075573000-memory.dmp

            Filesize

            8KB

          • memory/900-55-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/900-90-0x0000000000360000-0x00000000007BE000-memory.dmp

            Filesize

            4.4MB

          • memory/964-62-0x0000000000000000-mapping.dmp

          • memory/1468-76-0x0000000000000000-mapping.dmp

          • memory/1660-80-0x0000000000000000-mapping.dmp

          • memory/1812-81-0x0000000000000000-mapping.dmp

          • memory/1840-64-0x0000000000000000-mapping.dmp

          • memory/1940-58-0x0000000000000000-mapping.dmp

          • memory/1964-61-0x0000000000000000-mapping.dmp

          • memory/1980-59-0x0000000000000000-mapping.dmp