Analysis

  • max time kernel
    155s
  • max time network
    165s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-11-2022 10:29

General

  • Target

    38b68223c3d499d6f216d2559daf83898a3d8bc6d21e2d7d09fb3bee9e6e816d.exe

  • Size

    602KB

  • MD5

    8643e43309e5409bf89f9cb5db9ef110

  • SHA1

    a27930e81a803bc1cf6ed7b8c53eb7e02e2b41f8

  • SHA256

    38b68223c3d499d6f216d2559daf83898a3d8bc6d21e2d7d09fb3bee9e6e816d

  • SHA512

    8036fee3d32c47386fb94cee879e91288899c3d612a2dc826bbdc229eb6deabba45bffba46a15ec77158196277c21e65d85459788b6d640bc368b3d86ddc4d36

  • SSDEEP

    12288:SIny5DYTJut/5qpsy9UQs61UTtI9hUAWyKrVRvm:UUTJuWKy9UT610O9W1yuVRe

Score
8/10

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 14 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.

  • Modifies data under HKEY_USERS 1 IoCs
  • Runs net.exe
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\38b68223c3d499d6f216d2559daf83898a3d8bc6d21e2d7d09fb3bee9e6e816d.exe
    "C:\Users\Admin\AppData\Local\Temp\38b68223c3d499d6f216d2559daf83898a3d8bc6d21e2d7d09fb3bee9e6e816d.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:2120
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2112
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:4920
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1044
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:3596
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:2204
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:3692
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:3740
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1800
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:4552
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:4308
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:228
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Modifies data under HKEY_USERS
            • Suspicious use of AdjustPrivilegeToken
            PID:4548
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:2940

          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:\Users\Admin\AppData\Local\Temp\nsrC049.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • C:\Users\Admin\AppData\Local\Temp\nsrC049.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsrC049.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsrC049.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsrC049.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsrC049.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsrC049.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsrC049.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nsrC049.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

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

            106KB

            MD5

            017ce2844cd06be8d8d3daa4175afb56

            SHA1

            08c308772498d942b2810c7c63c8664f4ff65497

            SHA256

            74c1c655b86089f9b792d1ef4ae07be0bc7b0a5647b46ef47446e27e52217012

            SHA512

            7d37e4736b4f0ab97e289a35d36c7639fe61a67eedddd10049fed05c33f6b47029606f6f3efcd018e04a7beb756ade08e8781a49cb025b1201c4978f2ae36a7f

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

            106KB

            MD5

            017ce2844cd06be8d8d3daa4175afb56

            SHA1

            08c308772498d942b2810c7c63c8664f4ff65497

            SHA256

            74c1c655b86089f9b792d1ef4ae07be0bc7b0a5647b46ef47446e27e52217012

            SHA512

            7d37e4736b4f0ab97e289a35d36c7639fe61a67eedddd10049fed05c33f6b47029606f6f3efcd018e04a7beb756ade08e8781a49cb025b1201c4978f2ae36a7f

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

            106KB

            MD5

            017ce2844cd06be8d8d3daa4175afb56

            SHA1

            08c308772498d942b2810c7c63c8664f4ff65497

            SHA256

            74c1c655b86089f9b792d1ef4ae07be0bc7b0a5647b46ef47446e27e52217012

            SHA512

            7d37e4736b4f0ab97e289a35d36c7639fe61a67eedddd10049fed05c33f6b47029606f6f3efcd018e04a7beb756ade08e8781a49cb025b1201c4978f2ae36a7f

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

            106KB

            MD5

            017ce2844cd06be8d8d3daa4175afb56

            SHA1

            08c308772498d942b2810c7c63c8664f4ff65497

            SHA256

            74c1c655b86089f9b792d1ef4ae07be0bc7b0a5647b46ef47446e27e52217012

            SHA512

            7d37e4736b4f0ab97e289a35d36c7639fe61a67eedddd10049fed05c33f6b47029606f6f3efcd018e04a7beb756ade08e8781a49cb025b1201c4978f2ae36a7f

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

            241KB

            MD5

            2fb8744193045111551d20edffe60ba3

            SHA1

            7cfbec35a9695ca088e7277c68ad2ffc7db69c98

            SHA256

            46a7f8626aa892deeea8756c9d7742bc7b702245d565d8e4ec8db8448d058f5a

            SHA512

            58b2d38f0364ed9c1132409376a44f7451d9b08448993f68f41d3b15996c74b174f4f4faf18118a3272c12dcd91d08993b5fa5f7b58eeda8d4aa7ac2764c0935

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

            241KB

            MD5

            2fb8744193045111551d20edffe60ba3

            SHA1

            7cfbec35a9695ca088e7277c68ad2ffc7db69c98

            SHA256

            46a7f8626aa892deeea8756c9d7742bc7b702245d565d8e4ec8db8448d058f5a

            SHA512

            58b2d38f0364ed9c1132409376a44f7451d9b08448993f68f41d3b15996c74b174f4f4faf18118a3272c12dcd91d08993b5fa5f7b58eeda8d4aa7ac2764c0935

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

            241KB

            MD5

            2fb8744193045111551d20edffe60ba3

            SHA1

            7cfbec35a9695ca088e7277c68ad2ffc7db69c98

            SHA256

            46a7f8626aa892deeea8756c9d7742bc7b702245d565d8e4ec8db8448d058f5a

            SHA512

            58b2d38f0364ed9c1132409376a44f7451d9b08448993f68f41d3b15996c74b174f4f4faf18118a3272c12dcd91d08993b5fa5f7b58eeda8d4aa7ac2764c0935

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

            108KB

            MD5

            95960405b46e482ed666e09d441dae5f

            SHA1

            ccfdae6d9264c0fb6c79cab5d349edcde9a5b527

            SHA256

            b23c363ab794985fc45d55a98fcba8fdd1a53e4c0b621a73e87fd318f5433c8d

            SHA512

            9f546c527879af9f0e7a8c070ca87efb163977253fd86f0fb5e5ff7eebcc4446221f46ba9d48b5834663f91179d5e7ba0b8557c6511938be3d237407d10896b2

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

            108KB

            MD5

            95960405b46e482ed666e09d441dae5f

            SHA1

            ccfdae6d9264c0fb6c79cab5d349edcde9a5b527

            SHA256

            b23c363ab794985fc45d55a98fcba8fdd1a53e4c0b621a73e87fd318f5433c8d

            SHA512

            9f546c527879af9f0e7a8c070ca87efb163977253fd86f0fb5e5ff7eebcc4446221f46ba9d48b5834663f91179d5e7ba0b8557c6511938be3d237407d10896b2

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

            176KB

            MD5

            5a8192d2bf87461a335d00a0ff0de286

            SHA1

            78ce5c097e5d16a7459ccf0a8581859d07703adf

            SHA256

            df6d2ababa8d0b1bf77ed26a0c174a48ebde8f7878d4881be7e59a07d119b078

            SHA512

            9f9cd7807a96e7450a63b5ce9b0d5b7e13399c83bf4cc4eee7f9e4348c4fd8b46e25246de0dd6be93dd4de9b52cb61ff209e8aeb2b5b1ee2fcc70fa9232d73fa

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

            176KB

            MD5

            5a8192d2bf87461a335d00a0ff0de286

            SHA1

            78ce5c097e5d16a7459ccf0a8581859d07703adf

            SHA256

            df6d2ababa8d0b1bf77ed26a0c174a48ebde8f7878d4881be7e59a07d119b078

            SHA512

            9f9cd7807a96e7450a63b5ce9b0d5b7e13399c83bf4cc4eee7f9e4348c4fd8b46e25246de0dd6be93dd4de9b52cb61ff209e8aeb2b5b1ee2fcc70fa9232d73fa

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

            176KB

            MD5

            5a8192d2bf87461a335d00a0ff0de286

            SHA1

            78ce5c097e5d16a7459ccf0a8581859d07703adf

            SHA256

            df6d2ababa8d0b1bf77ed26a0c174a48ebde8f7878d4881be7e59a07d119b078

            SHA512

            9f9cd7807a96e7450a63b5ce9b0d5b7e13399c83bf4cc4eee7f9e4348c4fd8b46e25246de0dd6be93dd4de9b52cb61ff209e8aeb2b5b1ee2fcc70fa9232d73fa

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

            159KB

            MD5

            0aa0665ad8d871b6b538b8e969d549c2

            SHA1

            38d03d1641464514538799250c297f579cc581ba

            SHA256

            3f4dfebb06fc7cbcec8ac83a6ed86a714ae2274c173c04284e2393e134322c10

            SHA512

            545aac531d4f47eeaf57f1547eb64a54c18d6c76d81c50798b9f2e0a2c8f32258cfdc42c10c091674b7e7c3a4e13db9d7d63c5f80bcfcb07c476d01e95354a61

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

            159KB

            MD5

            0aa0665ad8d871b6b538b8e969d549c2

            SHA1

            38d03d1641464514538799250c297f579cc581ba

            SHA256

            3f4dfebb06fc7cbcec8ac83a6ed86a714ae2274c173c04284e2393e134322c10

            SHA512

            545aac531d4f47eeaf57f1547eb64a54c18d6c76d81c50798b9f2e0a2c8f32258cfdc42c10c091674b7e7c3a4e13db9d7d63c5f80bcfcb07c476d01e95354a61

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

            159KB

            MD5

            0aa0665ad8d871b6b538b8e969d549c2

            SHA1

            38d03d1641464514538799250c297f579cc581ba

            SHA256

            3f4dfebb06fc7cbcec8ac83a6ed86a714ae2274c173c04284e2393e134322c10

            SHA512

            545aac531d4f47eeaf57f1547eb64a54c18d6c76d81c50798b9f2e0a2c8f32258cfdc42c10c091674b7e7c3a4e13db9d7d63c5f80bcfcb07c476d01e95354a61

          • memory/228-166-0x0000000000000000-mapping.dmp
          • memory/1044-140-0x0000000000000000-mapping.dmp
          • memory/1800-158-0x0000000000000000-mapping.dmp
          • memory/2112-136-0x0000000000000000-mapping.dmp
          • memory/2120-133-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/2120-168-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/2204-142-0x0000000000000000-mapping.dmp
          • memory/3596-141-0x0000000000000000-mapping.dmp
          • memory/3692-147-0x0000000000000000-mapping.dmp
          • memory/3740-153-0x0000000000000000-mapping.dmp
          • memory/4308-165-0x0000000000000000-mapping.dmp
          • memory/4552-159-0x0000000000000000-mapping.dmp
          • memory/4920-137-0x0000000000000000-mapping.dmp