Analysis

  • max time kernel
    44s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:13

General

  • Target

    bf62cec257c769a80a417c62adff5f3d65dee3cce9d088ef955c1602d43b7f06.exe

  • Size

    601KB

  • MD5

    5856895a13ee761cd975e171976b2ead

  • SHA1

    bff7f5255b6c68e992641cc069bf7da58c652371

  • SHA256

    bf62cec257c769a80a417c62adff5f3d65dee3cce9d088ef955c1602d43b7f06

  • SHA512

    6d6c2dfc700ce9303a5cb19dc9a863dd71d9993d2cddd83ec7feea0271f8645fe89e1a66edb2f16f15785e1c2f4e81db29931f326e91ec9a0bad7cc7c204032a

  • SSDEEP

    12288:SIny5DYTtybxEnAq/QiLp7SZ+E32Ge5S4w96IX9ldD1lEXNUzb:UUTtybc/PIwE32NS42He9U/

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\bf62cec257c769a80a417c62adff5f3d65dee3cce9d088ef955c1602d43b7f06.exe
    "C:\Users\Admin\AppData\Local\Temp\bf62cec257c769a80a417c62adff5f3d65dee3cce9d088ef955c1602d43b7f06.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:1492
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1160
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:696
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:584
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:540
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:636
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1900
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1244
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:2000
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:744
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1012
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1652
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:2044
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1516

          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

            a2982eb6e245687eb7e8d1885fe1fd76

            SHA1

            a774305449ed7f91db561a1e4017d8606498a6a5

            SHA256

            937d7f93772faf4485295052cf893feb06d119c26539d2fa2bb12efa0476558f

            SHA512

            1f9bbf52dd7c85d997fa91d58f39da177947b547cd5e8d371e9071b47f943b6ca2f2bb43a7eac0cb6935ab5787d4eb7478827fb428d865c927c6b693c5d34e3a

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

            241KB

            MD5

            0287a92ac51ab7a43e999f59eb3f6e76

            SHA1

            1f5bb8459d158b27690d35adb12294819eb88ac5

            SHA256

            6406ffb5c18dd98a411b0ea7fb946b6c3d165498cf9ca28d0034dce31f7e9f48

            SHA512

            a553e4ff804591fe9d485f73c3330902a13908023e1c8d192adfa9eb41b8f69dbae1c99644094f213b24b321d83aac8f105d1a64ceab87f26b1319017b1dc211

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

            108KB

            MD5

            b3539d54c7ac3d057561bfcee788fe11

            SHA1

            c8df11b001cf5289368ad4a2f19c2ed4173f0bc9

            SHA256

            466a713228171ad2005b989fc8bcc9acface3984559a1b0fe1fbe1a65d0bd786

            SHA512

            007514fee6ed193a6349662e70bc5d8debb7809e60540b18f386deac9f92ed71224dc1e2f169cb79ae1f21211d3729793ba1a113f5c9f382b71712fc35291ac6

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

            176KB

            MD5

            ec51c012a20d82543aed1f532b411f19

            SHA1

            73c56eef35b5457e154fe4ff336771aee133e914

            SHA256

            bf485e133e1718f04134a9e2220b94f8dcfb22152451c6ad93f4d78c4be7037a

            SHA512

            fbad2132a6816228790785f0ddca524b26f10137932cb82fae7e728db4a891e29ed15697f03af09d30d995e1c52e82f6ad239fee0c99e24be15c4d9a0424e21b

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

            176KB

            MD5

            ec51c012a20d82543aed1f532b411f19

            SHA1

            73c56eef35b5457e154fe4ff336771aee133e914

            SHA256

            bf485e133e1718f04134a9e2220b94f8dcfb22152451c6ad93f4d78c4be7037a

            SHA512

            fbad2132a6816228790785f0ddca524b26f10137932cb82fae7e728db4a891e29ed15697f03af09d30d995e1c52e82f6ad239fee0c99e24be15c4d9a0424e21b

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

            159KB

            MD5

            35d0c1838272ea28cc7aa68ffc148692

            SHA1

            63b8f97248e356ebd665ad9ded60329afbca95b2

            SHA256

            8e6ad2171e3984497d8c37c53920f3242eed05ef0a33d5980c1e6ada5ddc5e78

            SHA512

            3f30e5237ea550bc6977c355003361c67cf7b0932eca112d6942d7d7ab69a5bbcb2ad89970753c87566a18bc413960abdee652c1a229d85c094fa029b3b76c90

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

            159KB

            MD5

            35d0c1838272ea28cc7aa68ffc148692

            SHA1

            63b8f97248e356ebd665ad9ded60329afbca95b2

            SHA256

            8e6ad2171e3984497d8c37c53920f3242eed05ef0a33d5980c1e6ada5ddc5e78

            SHA512

            3f30e5237ea550bc6977c355003361c67cf7b0932eca112d6942d7d7ab69a5bbcb2ad89970753c87566a18bc413960abdee652c1a229d85c094fa029b3b76c90

          • \Users\Admin\AppData\Local\Temp\nsi100A.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nsi100A.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsi100A.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsi100A.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nsi100A.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            a2982eb6e245687eb7e8d1885fe1fd76

            SHA1

            a774305449ed7f91db561a1e4017d8606498a6a5

            SHA256

            937d7f93772faf4485295052cf893feb06d119c26539d2fa2bb12efa0476558f

            SHA512

            1f9bbf52dd7c85d997fa91d58f39da177947b547cd5e8d371e9071b47f943b6ca2f2bb43a7eac0cb6935ab5787d4eb7478827fb428d865c927c6b693c5d34e3a

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            a2982eb6e245687eb7e8d1885fe1fd76

            SHA1

            a774305449ed7f91db561a1e4017d8606498a6a5

            SHA256

            937d7f93772faf4485295052cf893feb06d119c26539d2fa2bb12efa0476558f

            SHA512

            1f9bbf52dd7c85d997fa91d58f39da177947b547cd5e8d371e9071b47f943b6ca2f2bb43a7eac0cb6935ab5787d4eb7478827fb428d865c927c6b693c5d34e3a

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            a2982eb6e245687eb7e8d1885fe1fd76

            SHA1

            a774305449ed7f91db561a1e4017d8606498a6a5

            SHA256

            937d7f93772faf4485295052cf893feb06d119c26539d2fa2bb12efa0476558f

            SHA512

            1f9bbf52dd7c85d997fa91d58f39da177947b547cd5e8d371e9071b47f943b6ca2f2bb43a7eac0cb6935ab5787d4eb7478827fb428d865c927c6b693c5d34e3a

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            0287a92ac51ab7a43e999f59eb3f6e76

            SHA1

            1f5bb8459d158b27690d35adb12294819eb88ac5

            SHA256

            6406ffb5c18dd98a411b0ea7fb946b6c3d165498cf9ca28d0034dce31f7e9f48

            SHA512

            a553e4ff804591fe9d485f73c3330902a13908023e1c8d192adfa9eb41b8f69dbae1c99644094f213b24b321d83aac8f105d1a64ceab87f26b1319017b1dc211

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            241KB

            MD5

            0287a92ac51ab7a43e999f59eb3f6e76

            SHA1

            1f5bb8459d158b27690d35adb12294819eb88ac5

            SHA256

            6406ffb5c18dd98a411b0ea7fb946b6c3d165498cf9ca28d0034dce31f7e9f48

            SHA512

            a553e4ff804591fe9d485f73c3330902a13908023e1c8d192adfa9eb41b8f69dbae1c99644094f213b24b321d83aac8f105d1a64ceab87f26b1319017b1dc211

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            b3539d54c7ac3d057561bfcee788fe11

            SHA1

            c8df11b001cf5289368ad4a2f19c2ed4173f0bc9

            SHA256

            466a713228171ad2005b989fc8bcc9acface3984559a1b0fe1fbe1a65d0bd786

            SHA512

            007514fee6ed193a6349662e70bc5d8debb7809e60540b18f386deac9f92ed71224dc1e2f169cb79ae1f21211d3729793ba1a113f5c9f382b71712fc35291ac6

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            ec51c012a20d82543aed1f532b411f19

            SHA1

            73c56eef35b5457e154fe4ff336771aee133e914

            SHA256

            bf485e133e1718f04134a9e2220b94f8dcfb22152451c6ad93f4d78c4be7037a

            SHA512

            fbad2132a6816228790785f0ddca524b26f10137932cb82fae7e728db4a891e29ed15697f03af09d30d995e1c52e82f6ad239fee0c99e24be15c4d9a0424e21b

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            159KB

            MD5

            35d0c1838272ea28cc7aa68ffc148692

            SHA1

            63b8f97248e356ebd665ad9ded60329afbca95b2

            SHA256

            8e6ad2171e3984497d8c37c53920f3242eed05ef0a33d5980c1e6ada5ddc5e78

            SHA512

            3f30e5237ea550bc6977c355003361c67cf7b0932eca112d6942d7d7ab69a5bbcb2ad89970753c87566a18bc413960abdee652c1a229d85c094fa029b3b76c90

          • memory/540-62-0x0000000000000000-mapping.dmp
          • memory/584-61-0x0000000000000000-mapping.dmp
          • memory/636-64-0x0000000000000000-mapping.dmp
          • memory/696-58-0x0000000000000000-mapping.dmp
          • memory/744-81-0x0000000000000000-mapping.dmp
          • memory/1012-86-0x0000000000000000-mapping.dmp
          • memory/1160-57-0x0000000000000000-mapping.dmp
          • memory/1244-76-0x0000000000000000-mapping.dmp
          • memory/1492-54-0x0000000076BA1000-0x0000000076BA3000-memory.dmp
            Filesize

            8KB

          • memory/1492-59-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1492-90-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1652-87-0x0000000000000000-mapping.dmp
          • memory/1900-70-0x0000000000000000-mapping.dmp
          • memory/2000-80-0x0000000000000000-mapping.dmp