Analysis

  • max time kernel
    36s
  • max time network
    44s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2022 10:07

General

  • Target

    f4a8481c20d48dcd465c50f56cb8c293529c85739f8e6b5b70ec8b7df6f09bdb.exe

  • Size

    603KB

  • MD5

    eb951996b1881b72ce5d0fac206cdd26

  • SHA1

    bcdffd1466d2c5f8a6ac120be8a576bbdb38d8bc

  • SHA256

    f4a8481c20d48dcd465c50f56cb8c293529c85739f8e6b5b70ec8b7df6f09bdb

  • SHA512

    40e8e9870294f7e953d890027a0dfae92f37c9d91b0a88501f9cee0920906a212adbf35266b3f1543439741f2dd4f3219cadc10c722e13486d657d98fd9985b9

  • SSDEEP

    12288:zIny5DYTEV7mt5LLK1N9kEOxCeL8Koa+whPs:bUTEV7mtONORL8KBG

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\f4a8481c20d48dcd465c50f56cb8c293529c85739f8e6b5b70ec8b7df6f09bdb.exe
    "C:\Users\Admin\AppData\Local\Temp\f4a8481c20d48dcd465c50f56cb8c293529c85739f8e6b5b70ec8b7df6f09bdb.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:1488
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1692
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:1688
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1524
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:1792
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1560
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:572
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:1492
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1376
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1952
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1936
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:2016
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Suspicious use of AdjustPrivilegeToken
            PID:1384
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:1552

          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

            e0ff2bab5ac2af6abb719e1e38e2288f

            SHA1

            b278296c6486ec2fdbec7f8fd70176cf531d9989

            SHA256

            36f431cee70ba4497fd197f2bf2220ed9daa1518af400e02c7fbaa75f185ed83

            SHA512

            d9bbb6e0536115ebe95bb95579d6f9213e3a022c41fe24e6314973e352928c6d82974307194202fef3813e88d22dd5ee9db13ec0b1928094b2b5a786c6a58fc3

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

            244KB

            MD5

            ef3cf8fa0f55a8fa5442d0e152d24a11

            SHA1

            37618782517a155bae06b3c915304d5d40764d51

            SHA256

            aee0278aece695691cd1b12ba8e4b43bd9ce91fc02b75b1bad85870e4673ac8b

            SHA512

            77152f64a897e3270d1da9ebb71a9e1cca74286ecedef5a3059b72d4bdad66b7d9fb2ecce2ac8c17d7c585ee6000f4b601e4d0702c22c9d354cb0ee58b26bc8f

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

            108KB

            MD5

            72d9794c4459d765d3fdbe62b63ff8d0

            SHA1

            56230b29d754acd2e73f6e569d89089fcd126c9a

            SHA256

            a049d29b550985cd7b819d74ef82dbd9f8b737e61d0811f7654dd60d3e5d5800

            SHA512

            add376cbb4fda5730a2a3fa54b9af627650ca904a587fdd9f3a4db6c2a82e2bd2c2b1398b500fe58319debeb4992080f30baa0a584a3dc15a6a038c851de27bd

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

            176KB

            MD5

            bc1f0df2d5bb3ec34358937d8d36729d

            SHA1

            00082a744031fcd0c81585b47bef0b02a7ee4214

            SHA256

            e543b033174d0a8e1b07a50777f5d44fa4c6d69e1190f00414d818c22756935b

            SHA512

            719a3993ba43866a048c58e230b50bb14917475c7cdef6c63b3a2acf89d37c7926fc37a4127fb62114c0ad006f328f0de4ff2b4de59d3d74466473c29651a09c

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

            176KB

            MD5

            bc1f0df2d5bb3ec34358937d8d36729d

            SHA1

            00082a744031fcd0c81585b47bef0b02a7ee4214

            SHA256

            e543b033174d0a8e1b07a50777f5d44fa4c6d69e1190f00414d818c22756935b

            SHA512

            719a3993ba43866a048c58e230b50bb14917475c7cdef6c63b3a2acf89d37c7926fc37a4127fb62114c0ad006f328f0de4ff2b4de59d3d74466473c29651a09c

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

            158KB

            MD5

            41e39583efe0ae11613736379573f278

            SHA1

            347c1222e52d47cb165fb91a8fe7efe001776159

            SHA256

            4530e53c173bee5baac75335bc1043da210175d59cae5c6bf474fc432e64a25b

            SHA512

            c4e5acf380a6077878bec1c7c6dadb31de4c86daf94e0d27a4e2f18d7d841c90aa3ef88f24ae34ae741429459c7f0c6cacb02095a5ac202628f359072f964b7a

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

            158KB

            MD5

            41e39583efe0ae11613736379573f278

            SHA1

            347c1222e52d47cb165fb91a8fe7efe001776159

            SHA256

            4530e53c173bee5baac75335bc1043da210175d59cae5c6bf474fc432e64a25b

            SHA512

            c4e5acf380a6077878bec1c7c6dadb31de4c86daf94e0d27a4e2f18d7d841c90aa3ef88f24ae34ae741429459c7f0c6cacb02095a5ac202628f359072f964b7a

          • \Users\Admin\AppData\Local\Temp\nst67BB.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • \Users\Admin\AppData\Local\Temp\nst67BB.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst67BB.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst67BB.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Users\Admin\AppData\Local\Temp\nst67BB.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            e0ff2bab5ac2af6abb719e1e38e2288f

            SHA1

            b278296c6486ec2fdbec7f8fd70176cf531d9989

            SHA256

            36f431cee70ba4497fd197f2bf2220ed9daa1518af400e02c7fbaa75f185ed83

            SHA512

            d9bbb6e0536115ebe95bb95579d6f9213e3a022c41fe24e6314973e352928c6d82974307194202fef3813e88d22dd5ee9db13ec0b1928094b2b5a786c6a58fc3

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            e0ff2bab5ac2af6abb719e1e38e2288f

            SHA1

            b278296c6486ec2fdbec7f8fd70176cf531d9989

            SHA256

            36f431cee70ba4497fd197f2bf2220ed9daa1518af400e02c7fbaa75f185ed83

            SHA512

            d9bbb6e0536115ebe95bb95579d6f9213e3a022c41fe24e6314973e352928c6d82974307194202fef3813e88d22dd5ee9db13ec0b1928094b2b5a786c6a58fc3

          • \Windows\SysWOW64\hfnapi.dll
            Filesize

            106KB

            MD5

            e0ff2bab5ac2af6abb719e1e38e2288f

            SHA1

            b278296c6486ec2fdbec7f8fd70176cf531d9989

            SHA256

            36f431cee70ba4497fd197f2bf2220ed9daa1518af400e02c7fbaa75f185ed83

            SHA512

            d9bbb6e0536115ebe95bb95579d6f9213e3a022c41fe24e6314973e352928c6d82974307194202fef3813e88d22dd5ee9db13ec0b1928094b2b5a786c6a58fc3

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            244KB

            MD5

            ef3cf8fa0f55a8fa5442d0e152d24a11

            SHA1

            37618782517a155bae06b3c915304d5d40764d51

            SHA256

            aee0278aece695691cd1b12ba8e4b43bd9ce91fc02b75b1bad85870e4673ac8b

            SHA512

            77152f64a897e3270d1da9ebb71a9e1cca74286ecedef5a3059b72d4bdad66b7d9fb2ecce2ac8c17d7c585ee6000f4b601e4d0702c22c9d354cb0ee58b26bc8f

          • \Windows\SysWOW64\hfpapi.dll
            Filesize

            244KB

            MD5

            ef3cf8fa0f55a8fa5442d0e152d24a11

            SHA1

            37618782517a155bae06b3c915304d5d40764d51

            SHA256

            aee0278aece695691cd1b12ba8e4b43bd9ce91fc02b75b1bad85870e4673ac8b

            SHA512

            77152f64a897e3270d1da9ebb71a9e1cca74286ecedef5a3059b72d4bdad66b7d9fb2ecce2ac8c17d7c585ee6000f4b601e4d0702c22c9d354cb0ee58b26bc8f

          • \Windows\SysWOW64\installd.exe
            Filesize

            108KB

            MD5

            72d9794c4459d765d3fdbe62b63ff8d0

            SHA1

            56230b29d754acd2e73f6e569d89089fcd126c9a

            SHA256

            a049d29b550985cd7b819d74ef82dbd9f8b737e61d0811f7654dd60d3e5d5800

            SHA512

            add376cbb4fda5730a2a3fa54b9af627650ca904a587fdd9f3a4db6c2a82e2bd2c2b1398b500fe58319debeb4992080f30baa0a584a3dc15a6a038c851de27bd

          • \Windows\SysWOW64\nethtsrv.exe
            Filesize

            176KB

            MD5

            bc1f0df2d5bb3ec34358937d8d36729d

            SHA1

            00082a744031fcd0c81585b47bef0b02a7ee4214

            SHA256

            e543b033174d0a8e1b07a50777f5d44fa4c6d69e1190f00414d818c22756935b

            SHA512

            719a3993ba43866a048c58e230b50bb14917475c7cdef6c63b3a2acf89d37c7926fc37a4127fb62114c0ad006f328f0de4ff2b4de59d3d74466473c29651a09c

          • \Windows\SysWOW64\netupdsrv.exe
            Filesize

            158KB

            MD5

            41e39583efe0ae11613736379573f278

            SHA1

            347c1222e52d47cb165fb91a8fe7efe001776159

            SHA256

            4530e53c173bee5baac75335bc1043da210175d59cae5c6bf474fc432e64a25b

            SHA512

            c4e5acf380a6077878bec1c7c6dadb31de4c86daf94e0d27a4e2f18d7d841c90aa3ef88f24ae34ae741429459c7f0c6cacb02095a5ac202628f359072f964b7a

          • memory/572-70-0x0000000000000000-mapping.dmp
          • memory/1376-80-0x0000000000000000-mapping.dmp
          • memory/1488-54-0x0000000076681000-0x0000000076683000-memory.dmp
            Filesize

            8KB

          • memory/1488-55-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1488-90-0x0000000000360000-0x00000000007BE000-memory.dmp
            Filesize

            4.4MB

          • memory/1492-76-0x0000000000000000-mapping.dmp
          • memory/1524-61-0x0000000000000000-mapping.dmp
          • memory/1560-64-0x0000000000000000-mapping.dmp
          • memory/1688-59-0x0000000000000000-mapping.dmp
          • memory/1692-58-0x0000000000000000-mapping.dmp
          • memory/1792-62-0x0000000000000000-mapping.dmp
          • memory/1936-86-0x0000000000000000-mapping.dmp
          • memory/1952-81-0x0000000000000000-mapping.dmp
          • memory/2016-87-0x0000000000000000-mapping.dmp