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 10:56

General

  • Target

    641db8edb294c24d79df1cafbc40fedd0c34d36608efd1130fe2e7907c8f2c18.exe

  • Size

    446KB

  • MD5

    77c36bab48674d991f60184426a8f125

  • SHA1

    a97ab82fbb1c079195508e1b39cef2a46e05430f

  • SHA256

    641db8edb294c24d79df1cafbc40fedd0c34d36608efd1130fe2e7907c8f2c18

  • SHA512

    8ec53dfcd5779cf96c7b32a2d29d330fdc6805d90cc3604b49080573b3684d947a245f046b891ed40d2717d58ad61d79ccdfbe7291f5b4a8743826e3aa19ca14

  • SSDEEP

    12288:B/UBgm4LkHfJBnOTJqhpK0SfUv7Up9s5aT2upelDnG:B/Cg4HjOlmNtUpHAG

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\641db8edb294c24d79df1cafbc40fedd0c34d36608efd1130fe2e7907c8f2c18.exe
    "C:\Users\Admin\AppData\Local\Temp\641db8edb294c24d79df1cafbc40fedd0c34d36608efd1130fe2e7907c8f2c18.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:1668
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1960
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1760
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2000
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1740
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1996
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:268
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1784
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:592
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1084
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:2012
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:1300
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:616
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:696

          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

            24f9dd2b2797ec1d9c93c90c71f11abb

            SHA1

            3a3eea3d90b002952032299cef16a239e7d5f5f1

            SHA256

            8fa2692b71b12538f844b16fac32be5ca12577de3728df9fb2a6b7599b8492af

            SHA512

            fa20a525a92d4e13535990b4bdecfec14ece6461b9873b666bceb6b6698634e6426d403bce0ecfb40fde83060cfa1a9d6b6d500366dfae512bd27577d84934fb

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

            244KB

            MD5

            4f37913692a05315ddaef9b93b8094a9

            SHA1

            28265c7f7b0eb08960845fe5289105c00b3be184

            SHA256

            a87493e17e9c8b607cda14bffb79eb0495d2f7c789a726fc6149ca7c2c116561

            SHA512

            cbb72152b5f5cca6dfdae9e5919aadeb90022395c7738d18f4654bd5e4ce9bf18d8a6a07d76e69b9c5cb3bb7298748cb2a4681d37753b160a404cbeecb5459ae

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

            108KB

            MD5

            2f88428cffc51f37bf709a574e08e65c

            SHA1

            3a3bea3468ef7e1a61df55ebb88d10f2c1c73d2a

            SHA256

            5bb0467b0a42ecbd3972b91c1c8b524fd5e5553eb2e6e9f0581057d63940756f

            SHA512

            30a1ecc6ecc7283ff4bfcf6569d76e6ac76c37d53d5b83176828627b7edd7d51e84e352d9064b8135b49d24a0cb3f3c33a14d46700dc47c50c952f7675f15696

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

            176KB

            MD5

            96ef3977baa1c202aaa5c011cdbbc7d6

            SHA1

            d1544e50d014e97de6fe35b3fa0e526af592b529

            SHA256

            1c06f81af2819e4c92f882e091141573d74129466a44894bb66e6e57a96ac4a4

            SHA512

            47032504f8e14ebb24167543b9f4ebc60ede7a337c99e2d29ef7aff6154d7ded5b62edfb3211c6b87aae5e4dd252a486e31915cc73d9b6da07958492a22afd13

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

            176KB

            MD5

            96ef3977baa1c202aaa5c011cdbbc7d6

            SHA1

            d1544e50d014e97de6fe35b3fa0e526af592b529

            SHA256

            1c06f81af2819e4c92f882e091141573d74129466a44894bb66e6e57a96ac4a4

            SHA512

            47032504f8e14ebb24167543b9f4ebc60ede7a337c99e2d29ef7aff6154d7ded5b62edfb3211c6b87aae5e4dd252a486e31915cc73d9b6da07958492a22afd13

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

            158KB

            MD5

            0e7be2b6fcc23a110957d753b509be51

            SHA1

            6ea780055d69cd53f6d55a5f1d34c974981977ba

            SHA256

            d3ded6a595712959db3dd64d47334febb6af4f7242fcab55c45a1965b39a095a

            SHA512

            ee7e76457a48f77361f691f95c435d536da08574ca6d0bf543a577835d752f88699250f67cea1496c9797cfd3a2d26e750bf5bea492e05212ca85667a12ba2de

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

            158KB

            MD5

            0e7be2b6fcc23a110957d753b509be51

            SHA1

            6ea780055d69cd53f6d55a5f1d34c974981977ba

            SHA256

            d3ded6a595712959db3dd64d47334febb6af4f7242fcab55c45a1965b39a095a

            SHA512

            ee7e76457a48f77361f691f95c435d536da08574ca6d0bf543a577835d752f88699250f67cea1496c9797cfd3a2d26e750bf5bea492e05212ca85667a12ba2de

          • \Users\Admin\AppData\Local\Temp\nstFF39.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nstFF39.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nstFF39.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nstFF39.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nstFF39.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            24f9dd2b2797ec1d9c93c90c71f11abb

            SHA1

            3a3eea3d90b002952032299cef16a239e7d5f5f1

            SHA256

            8fa2692b71b12538f844b16fac32be5ca12577de3728df9fb2a6b7599b8492af

            SHA512

            fa20a525a92d4e13535990b4bdecfec14ece6461b9873b666bceb6b6698634e6426d403bce0ecfb40fde83060cfa1a9d6b6d500366dfae512bd27577d84934fb

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            24f9dd2b2797ec1d9c93c90c71f11abb

            SHA1

            3a3eea3d90b002952032299cef16a239e7d5f5f1

            SHA256

            8fa2692b71b12538f844b16fac32be5ca12577de3728df9fb2a6b7599b8492af

            SHA512

            fa20a525a92d4e13535990b4bdecfec14ece6461b9873b666bceb6b6698634e6426d403bce0ecfb40fde83060cfa1a9d6b6d500366dfae512bd27577d84934fb

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            24f9dd2b2797ec1d9c93c90c71f11abb

            SHA1

            3a3eea3d90b002952032299cef16a239e7d5f5f1

            SHA256

            8fa2692b71b12538f844b16fac32be5ca12577de3728df9fb2a6b7599b8492af

            SHA512

            fa20a525a92d4e13535990b4bdecfec14ece6461b9873b666bceb6b6698634e6426d403bce0ecfb40fde83060cfa1a9d6b6d500366dfae512bd27577d84934fb

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            244KB

            MD5

            4f37913692a05315ddaef9b93b8094a9

            SHA1

            28265c7f7b0eb08960845fe5289105c00b3be184

            SHA256

            a87493e17e9c8b607cda14bffb79eb0495d2f7c789a726fc6149ca7c2c116561

            SHA512

            cbb72152b5f5cca6dfdae9e5919aadeb90022395c7738d18f4654bd5e4ce9bf18d8a6a07d76e69b9c5cb3bb7298748cb2a4681d37753b160a404cbeecb5459ae

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            244KB

            MD5

            4f37913692a05315ddaef9b93b8094a9

            SHA1

            28265c7f7b0eb08960845fe5289105c00b3be184

            SHA256

            a87493e17e9c8b607cda14bffb79eb0495d2f7c789a726fc6149ca7c2c116561

            SHA512

            cbb72152b5f5cca6dfdae9e5919aadeb90022395c7738d18f4654bd5e4ce9bf18d8a6a07d76e69b9c5cb3bb7298748cb2a4681d37753b160a404cbeecb5459ae

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            2f88428cffc51f37bf709a574e08e65c

            SHA1

            3a3bea3468ef7e1a61df55ebb88d10f2c1c73d2a

            SHA256

            5bb0467b0a42ecbd3972b91c1c8b524fd5e5553eb2e6e9f0581057d63940756f

            SHA512

            30a1ecc6ecc7283ff4bfcf6569d76e6ac76c37d53d5b83176828627b7edd7d51e84e352d9064b8135b49d24a0cb3f3c33a14d46700dc47c50c952f7675f15696

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            96ef3977baa1c202aaa5c011cdbbc7d6

            SHA1

            d1544e50d014e97de6fe35b3fa0e526af592b529

            SHA256

            1c06f81af2819e4c92f882e091141573d74129466a44894bb66e6e57a96ac4a4

            SHA512

            47032504f8e14ebb24167543b9f4ebc60ede7a337c99e2d29ef7aff6154d7ded5b62edfb3211c6b87aae5e4dd252a486e31915cc73d9b6da07958492a22afd13

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            0e7be2b6fcc23a110957d753b509be51

            SHA1

            6ea780055d69cd53f6d55a5f1d34c974981977ba

            SHA256

            d3ded6a595712959db3dd64d47334febb6af4f7242fcab55c45a1965b39a095a

            SHA512

            ee7e76457a48f77361f691f95c435d536da08574ca6d0bf543a577835d752f88699250f67cea1496c9797cfd3a2d26e750bf5bea492e05212ca85667a12ba2de

          • memory/268-69-0x0000000000000000-mapping.dmp
          • memory/592-79-0x0000000000000000-mapping.dmp
          • memory/1084-80-0x0000000000000000-mapping.dmp
          • memory/1300-86-0x0000000000000000-mapping.dmp
          • memory/1668-54-0x0000000075241000-0x0000000075243000-memory.dmp
            Filesize

            8KB

          • memory/1740-61-0x0000000000000000-mapping.dmp
          • memory/1760-58-0x0000000000000000-mapping.dmp
          • memory/1784-75-0x0000000000000000-mapping.dmp
          • memory/1960-57-0x0000000000000000-mapping.dmp
          • memory/1996-63-0x0000000000000000-mapping.dmp
          • memory/2000-60-0x0000000000000000-mapping.dmp
          • memory/2012-85-0x0000000000000000-mapping.dmp