Analysis

  • max time kernel
    42s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:12

General

  • Target

    c8e77fdda48d3c7eeaf6d3216fe2f6527a783ce313806d06d6ff2a83d1d6f37c.exe

  • Size

    602KB

  • MD5

    92a1521e97a1377f10fd4c598b71c04e

  • SHA1

    ac614e6163f40c81694eb385038e7d1d5c5ac0ab

  • SHA256

    c8e77fdda48d3c7eeaf6d3216fe2f6527a783ce313806d06d6ff2a83d1d6f37c

  • SHA512

    498937a748dc5ee3df9a6c054475c58f05f2d581940917edda9b5aa7804dac35f7aea664484befb7fbebf6b63580aac069575fef3443abe49ef41ab68eaa35e5

  • SSDEEP

    12288:iIny5DYTaxoM0vg31y0BFrllwopgAddngWcS974FqGF:EUTa+M0vSQ0Btwu3dZAS92h

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\c8e77fdda48d3c7eeaf6d3216fe2f6527a783ce313806d06d6ff2a83d1d6f37c.exe
    "C:\Users\Admin\AppData\Local\Temp\c8e77fdda48d3c7eeaf6d3216fe2f6527a783ce313806d06d6ff2a83d1d6f37c.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:996
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1168
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1240
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1736
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1200
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:896
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1384
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1112
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:332
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1988
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1100
            • 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:544
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1236

          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

            a1d98b5fb74c0be150cc069edd1de063

            SHA1

            431a302f6cf1a2dcf7ceda5186bcca3cd8578519

            SHA256

            86f47c532993e3d9fd573be5a3c283d8d7c8fac3a59d10b7c2d1325dc8f372d3

            SHA512

            f59aba8656a506b52e91073da1b6ab0d1ca36af44aab62718dfb550ca348f5f07534a5e78b3362e6a22ce524e655d2e6d9f5d6f9a53465b18f548d66527803b9

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

            241KB

            MD5

            da1e6b60fec2677778cdccd4399c7bf9

            SHA1

            f703749ea76bd45e91ef27c8fcc060099a9b8326

            SHA256

            7ae6bdba6e756e1b8b71a1262c79ada9255e7048ebd9377e6eb3d9961df515fb

            SHA512

            3503022ae7d2b763628fbe783d1642a532c99e4290e85c600c01bb6f2c28e65cc50e5b56c573618753e9416d820d0502410511fb9d569290ff69baf816b0366f

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

            108KB

            MD5

            6084b865bcd1f8e93e320d52dd0a26d7

            SHA1

            40a178c55df82a3f5e97f3b22f79374612ec7451

            SHA256

            0e69200fb47d4b3519bb65a533124ce4068fa21da32e616597f51088f06c9353

            SHA512

            7233c91ee75b2dd308c2197033dd4e2807bf8cfd3bd3557e08b0c961bef216de47fa1a2c32f290d01f3e6a8873200bd1c818a25f53d573e6a4fa213ae13b7569

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

            176KB

            MD5

            4791f8db2a53f9ade29bf9b62285ee14

            SHA1

            26b49ed8deea34e99ada16d860c35a8077b04b8a

            SHA256

            1523c54dc579b5a0f2071d3a7b3c7c0132084a88772d5c090b1298fb19031f0e

            SHA512

            8a775c4954d733b5de0f2498f46a0344b88295534ac87d2c9ed1992f18dbeb067760167b8040d2fcccff49c4f49b33857fa7b488b275ddd855f1ba43fe7f6caa

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

            176KB

            MD5

            4791f8db2a53f9ade29bf9b62285ee14

            SHA1

            26b49ed8deea34e99ada16d860c35a8077b04b8a

            SHA256

            1523c54dc579b5a0f2071d3a7b3c7c0132084a88772d5c090b1298fb19031f0e

            SHA512

            8a775c4954d733b5de0f2498f46a0344b88295534ac87d2c9ed1992f18dbeb067760167b8040d2fcccff49c4f49b33857fa7b488b275ddd855f1ba43fe7f6caa

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

            158KB

            MD5

            c13be4b60c64569362c8c619541de24d

            SHA1

            7dc709c565ca3bdf37ed184b33efa79eee1ae246

            SHA256

            0ef600cf051f6fad3c71723343b6c6f6903653c76d9d821511eba84d382739fa

            SHA512

            3a3f2c98649726562a9df3260cfc8344437d03a3d9c2321705aaf1167b7c72170281b8c798ebc2d68d966e9dab77909edb9bfff4b8c5a8503ea3b00b9aa29de1

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

            158KB

            MD5

            c13be4b60c64569362c8c619541de24d

            SHA1

            7dc709c565ca3bdf37ed184b33efa79eee1ae246

            SHA256

            0ef600cf051f6fad3c71723343b6c6f6903653c76d9d821511eba84d382739fa

            SHA512

            3a3f2c98649726562a9df3260cfc8344437d03a3d9c2321705aaf1167b7c72170281b8c798ebc2d68d966e9dab77909edb9bfff4b8c5a8503ea3b00b9aa29de1

          • \Users\Admin\AppData\Local\Temp\nst5489.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nst5489.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst5489.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst5489.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst5489.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            a1d98b5fb74c0be150cc069edd1de063

            SHA1

            431a302f6cf1a2dcf7ceda5186bcca3cd8578519

            SHA256

            86f47c532993e3d9fd573be5a3c283d8d7c8fac3a59d10b7c2d1325dc8f372d3

            SHA512

            f59aba8656a506b52e91073da1b6ab0d1ca36af44aab62718dfb550ca348f5f07534a5e78b3362e6a22ce524e655d2e6d9f5d6f9a53465b18f548d66527803b9

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            a1d98b5fb74c0be150cc069edd1de063

            SHA1

            431a302f6cf1a2dcf7ceda5186bcca3cd8578519

            SHA256

            86f47c532993e3d9fd573be5a3c283d8d7c8fac3a59d10b7c2d1325dc8f372d3

            SHA512

            f59aba8656a506b52e91073da1b6ab0d1ca36af44aab62718dfb550ca348f5f07534a5e78b3362e6a22ce524e655d2e6d9f5d6f9a53465b18f548d66527803b9

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            a1d98b5fb74c0be150cc069edd1de063

            SHA1

            431a302f6cf1a2dcf7ceda5186bcca3cd8578519

            SHA256

            86f47c532993e3d9fd573be5a3c283d8d7c8fac3a59d10b7c2d1325dc8f372d3

            SHA512

            f59aba8656a506b52e91073da1b6ab0d1ca36af44aab62718dfb550ca348f5f07534a5e78b3362e6a22ce524e655d2e6d9f5d6f9a53465b18f548d66527803b9

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            da1e6b60fec2677778cdccd4399c7bf9

            SHA1

            f703749ea76bd45e91ef27c8fcc060099a9b8326

            SHA256

            7ae6bdba6e756e1b8b71a1262c79ada9255e7048ebd9377e6eb3d9961df515fb

            SHA512

            3503022ae7d2b763628fbe783d1642a532c99e4290e85c600c01bb6f2c28e65cc50e5b56c573618753e9416d820d0502410511fb9d569290ff69baf816b0366f

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            da1e6b60fec2677778cdccd4399c7bf9

            SHA1

            f703749ea76bd45e91ef27c8fcc060099a9b8326

            SHA256

            7ae6bdba6e756e1b8b71a1262c79ada9255e7048ebd9377e6eb3d9961df515fb

            SHA512

            3503022ae7d2b763628fbe783d1642a532c99e4290e85c600c01bb6f2c28e65cc50e5b56c573618753e9416d820d0502410511fb9d569290ff69baf816b0366f

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            6084b865bcd1f8e93e320d52dd0a26d7

            SHA1

            40a178c55df82a3f5e97f3b22f79374612ec7451

            SHA256

            0e69200fb47d4b3519bb65a533124ce4068fa21da32e616597f51088f06c9353

            SHA512

            7233c91ee75b2dd308c2197033dd4e2807bf8cfd3bd3557e08b0c961bef216de47fa1a2c32f290d01f3e6a8873200bd1c818a25f53d573e6a4fa213ae13b7569

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            4791f8db2a53f9ade29bf9b62285ee14

            SHA1

            26b49ed8deea34e99ada16d860c35a8077b04b8a

            SHA256

            1523c54dc579b5a0f2071d3a7b3c7c0132084a88772d5c090b1298fb19031f0e

            SHA512

            8a775c4954d733b5de0f2498f46a0344b88295534ac87d2c9ed1992f18dbeb067760167b8040d2fcccff49c4f49b33857fa7b488b275ddd855f1ba43fe7f6caa

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            c13be4b60c64569362c8c619541de24d

            SHA1

            7dc709c565ca3bdf37ed184b33efa79eee1ae246

            SHA256

            0ef600cf051f6fad3c71723343b6c6f6903653c76d9d821511eba84d382739fa

            SHA512

            3a3f2c98649726562a9df3260cfc8344437d03a3d9c2321705aaf1167b7c72170281b8c798ebc2d68d966e9dab77909edb9bfff4b8c5a8503ea3b00b9aa29de1

          • memory/332-80-0x0000000000000000-mapping.dmp
          • memory/896-64-0x0000000000000000-mapping.dmp
          • memory/996-62-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/996-90-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/996-54-0x0000000075E11000-0x0000000075E13000-memory.dmp
            Filesize

            8KB

          • memory/1064-87-0x0000000000000000-mapping.dmp
          • memory/1100-86-0x0000000000000000-mapping.dmp
          • memory/1112-76-0x0000000000000000-mapping.dmp
          • memory/1168-57-0x0000000000000000-mapping.dmp
          • memory/1200-61-0x0000000000000000-mapping.dmp
          • memory/1240-58-0x0000000000000000-mapping.dmp
          • memory/1384-70-0x0000000000000000-mapping.dmp
          • memory/1736-60-0x0000000000000000-mapping.dmp
          • memory/1988-81-0x0000000000000000-mapping.dmp