Analysis

  • max time kernel
    42s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 11:00

General

  • Target

    13b334243e130e7b0b261a4c72e4b1a2d3219e8899b5a4eb2c3c9435faa2abaa.exe

  • Size

    446KB

  • MD5

    44fa6a39a1fba70f665c343093960c71

  • SHA1

    805aaa96cb048f5c61cd416623f1c76318f0932e

  • SHA256

    13b334243e130e7b0b261a4c72e4b1a2d3219e8899b5a4eb2c3c9435faa2abaa

  • SHA512

    ec5a6052fbf7eedf8f867e1881e70f304b9655e5c80880f8b9b97063f948a727bc89b8287d30ec8b8b950e3d30db254329d384c41cdd6b6f1d94fe286475cd47

  • SSDEEP

    12288:99UCJhukcjcwE46Ui3Tk6vy972VjfMd5XrT:99fvcj0BDZO7ggXrT

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\13b334243e130e7b0b261a4c72e4b1a2d3219e8899b5a4eb2c3c9435faa2abaa.exe
    "C:\Users\Admin\AppData\Local\Temp\13b334243e130e7b0b261a4c72e4b1a2d3219e8899b5a4eb2c3c9435faa2abaa.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:1636
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:844
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1340
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1336
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1136
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1708
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1960
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1092
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1744
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:820
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:848
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:972
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1848
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:684

          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

            660530cd22e2bab286a4d5692d3385cc

            SHA1

            a80fdc470f80e3ebdb54d78d03c8b3de835e9927

            SHA256

            bdefb791241912b773452de9866f05b52775910d79da6bc573b545fd3abb9ef3

            SHA512

            dcfb48fc16916e2732ca34735b01da9e56f09a5ca3650e8f9962cc16fecf0c65362e27138bd2a14e18bf47d1cadf748452e645e13c79e1c6f6a21386426e27dc

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

            241KB

            MD5

            e247f5c0c62b8c8fa017bef20b27938c

            SHA1

            5fb3a46ccbe5160c1039e702ac84cb23b5318fcc

            SHA256

            a407151c3e0029471415c40ae614e8af4b19f96838312a466e269d5bf7698720

            SHA512

            e6e5312fea4bd7ca8f5b0b53264ac4513bda197d149634d522cd7e0278fa1834d1b5d37ea2fd425eca9573dee6902af4ad0771042c77cb5dc42eead358746089

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

            108KB

            MD5

            f7e4badaa20b05ed3e70fa43a53766b2

            SHA1

            08e261b6588ace0c85ecf34394c028eedb078185

            SHA256

            f45637cbc4a9278fa9ee891d1708d81a239a1714689777ab3b4cb16a0069ce92

            SHA512

            698334ae971730abd396f5b9e3dbdcd84881d70e30d218a446f09838b3a3ce286782a89f1239c9ab197b80e03d13202bea9455a866acacd20854f5652505a276

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

            176KB

            MD5

            2939709ad3ea0a15ef1cb51b30623023

            SHA1

            ac3d438e68961a0a3a5bbdcd07f0722f489ba120

            SHA256

            94c9f49aeff5947d4cf60daa711e357f7fd913330ccabc6e0bd29ad64f5d944b

            SHA512

            d01885e3f9a76e713653123c8903b1b9745dbb79aa06945224647280da580001452bc96d8549e2b20dcbc55f5981c23e322824d24afd350f5f4a4c17f6437855

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

            176KB

            MD5

            2939709ad3ea0a15ef1cb51b30623023

            SHA1

            ac3d438e68961a0a3a5bbdcd07f0722f489ba120

            SHA256

            94c9f49aeff5947d4cf60daa711e357f7fd913330ccabc6e0bd29ad64f5d944b

            SHA512

            d01885e3f9a76e713653123c8903b1b9745dbb79aa06945224647280da580001452bc96d8549e2b20dcbc55f5981c23e322824d24afd350f5f4a4c17f6437855

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

            158KB

            MD5

            2a96d6165e67203fb116a486abccf5d9

            SHA1

            5f7743955153189f2af84196ec9af26eb659d836

            SHA256

            6208e021232647442565aa87daf33867e058dda2aa6310bbbd6506ab655682af

            SHA512

            9a550a6f26f930900f765e805f140efc69557129cad11392a9a0f13aadcaadad5035f97607b752d3a5bcdf31a83c7bdd2147af2f4c865b95768cb67015a5a0a9

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

            158KB

            MD5

            2a96d6165e67203fb116a486abccf5d9

            SHA1

            5f7743955153189f2af84196ec9af26eb659d836

            SHA256

            6208e021232647442565aa87daf33867e058dda2aa6310bbbd6506ab655682af

            SHA512

            9a550a6f26f930900f765e805f140efc69557129cad11392a9a0f13aadcaadad5035f97607b752d3a5bcdf31a83c7bdd2147af2f4c865b95768cb67015a5a0a9

          • \Users\Admin\AppData\Local\Temp\nstFB91.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nstFB91.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nstFB91.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nstFB91.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nstFB91.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            660530cd22e2bab286a4d5692d3385cc

            SHA1

            a80fdc470f80e3ebdb54d78d03c8b3de835e9927

            SHA256

            bdefb791241912b773452de9866f05b52775910d79da6bc573b545fd3abb9ef3

            SHA512

            dcfb48fc16916e2732ca34735b01da9e56f09a5ca3650e8f9962cc16fecf0c65362e27138bd2a14e18bf47d1cadf748452e645e13c79e1c6f6a21386426e27dc

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            660530cd22e2bab286a4d5692d3385cc

            SHA1

            a80fdc470f80e3ebdb54d78d03c8b3de835e9927

            SHA256

            bdefb791241912b773452de9866f05b52775910d79da6bc573b545fd3abb9ef3

            SHA512

            dcfb48fc16916e2732ca34735b01da9e56f09a5ca3650e8f9962cc16fecf0c65362e27138bd2a14e18bf47d1cadf748452e645e13c79e1c6f6a21386426e27dc

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            660530cd22e2bab286a4d5692d3385cc

            SHA1

            a80fdc470f80e3ebdb54d78d03c8b3de835e9927

            SHA256

            bdefb791241912b773452de9866f05b52775910d79da6bc573b545fd3abb9ef3

            SHA512

            dcfb48fc16916e2732ca34735b01da9e56f09a5ca3650e8f9962cc16fecf0c65362e27138bd2a14e18bf47d1cadf748452e645e13c79e1c6f6a21386426e27dc

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            e247f5c0c62b8c8fa017bef20b27938c

            SHA1

            5fb3a46ccbe5160c1039e702ac84cb23b5318fcc

            SHA256

            a407151c3e0029471415c40ae614e8af4b19f96838312a466e269d5bf7698720

            SHA512

            e6e5312fea4bd7ca8f5b0b53264ac4513bda197d149634d522cd7e0278fa1834d1b5d37ea2fd425eca9573dee6902af4ad0771042c77cb5dc42eead358746089

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            e247f5c0c62b8c8fa017bef20b27938c

            SHA1

            5fb3a46ccbe5160c1039e702ac84cb23b5318fcc

            SHA256

            a407151c3e0029471415c40ae614e8af4b19f96838312a466e269d5bf7698720

            SHA512

            e6e5312fea4bd7ca8f5b0b53264ac4513bda197d149634d522cd7e0278fa1834d1b5d37ea2fd425eca9573dee6902af4ad0771042c77cb5dc42eead358746089

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            f7e4badaa20b05ed3e70fa43a53766b2

            SHA1

            08e261b6588ace0c85ecf34394c028eedb078185

            SHA256

            f45637cbc4a9278fa9ee891d1708d81a239a1714689777ab3b4cb16a0069ce92

            SHA512

            698334ae971730abd396f5b9e3dbdcd84881d70e30d218a446f09838b3a3ce286782a89f1239c9ab197b80e03d13202bea9455a866acacd20854f5652505a276

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            2939709ad3ea0a15ef1cb51b30623023

            SHA1

            ac3d438e68961a0a3a5bbdcd07f0722f489ba120

            SHA256

            94c9f49aeff5947d4cf60daa711e357f7fd913330ccabc6e0bd29ad64f5d944b

            SHA512

            d01885e3f9a76e713653123c8903b1b9745dbb79aa06945224647280da580001452bc96d8549e2b20dcbc55f5981c23e322824d24afd350f5f4a4c17f6437855

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            2a96d6165e67203fb116a486abccf5d9

            SHA1

            5f7743955153189f2af84196ec9af26eb659d836

            SHA256

            6208e021232647442565aa87daf33867e058dda2aa6310bbbd6506ab655682af

            SHA512

            9a550a6f26f930900f765e805f140efc69557129cad11392a9a0f13aadcaadad5035f97607b752d3a5bcdf31a83c7bdd2147af2f4c865b95768cb67015a5a0a9

          • memory/820-80-0x0000000000000000-mapping.dmp
          • memory/844-57-0x0000000000000000-mapping.dmp
          • memory/848-85-0x0000000000000000-mapping.dmp
          • memory/972-86-0x0000000000000000-mapping.dmp
          • memory/1092-75-0x0000000000000000-mapping.dmp
          • memory/1136-61-0x0000000000000000-mapping.dmp
          • memory/1336-60-0x0000000000000000-mapping.dmp
          • memory/1340-58-0x0000000000000000-mapping.dmp
          • memory/1636-54-0x00000000762F1000-0x00000000762F3000-memory.dmp
            Filesize

            8KB

          • memory/1708-63-0x0000000000000000-mapping.dmp
          • memory/1744-79-0x0000000000000000-mapping.dmp
          • memory/1960-69-0x0000000000000000-mapping.dmp