Analysis

  • max time kernel
    142s
  • max time network
    162s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-11-2022 10:58

General

  • Target

    3e99ad2a6e8e6e11a960fec1ca739553b1840bff90f73f76b4f35117921222a5.exe

  • Size

    446KB

  • MD5

    37312f6292c0ac49cb122d75d7baeb10

  • SHA1

    ebe5cfa3e691d4c4952bbf83af4bdacf2571b6ef

  • SHA256

    3e99ad2a6e8e6e11a960fec1ca739553b1840bff90f73f76b4f35117921222a5

  • SHA512

    7b968051a9128f6b1b4afc0a2d0802e3625523f89ba3c97e327598749293e54d44da92156f9dbd014e9d3210dcd84ca8a9c81a17dc5615b32abb7139326eb086

  • SSDEEP

    12288:AcABo3Zz//AFRJsOjNjN2MLYDgtgMaRMlmdxb:ABS/eRJskVUMLY2baRMlmL

Score
8/10

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 14 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.

  • Modifies data under HKEY_USERS 1 IoCs
  • Runs net.exe
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3e99ad2a6e8e6e11a960fec1ca739553b1840bff90f73f76b4f35117921222a5.exe
    "C:\Users\Admin\AppData\Local\Temp\3e99ad2a6e8e6e11a960fec1ca739553b1840bff90f73f76b4f35117921222a5.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:4376
    • C:\Windows\SysWOW64\net.exe
      net stop nethttpservice
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4948
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop nethttpservice
        3⤵
          PID:4860
      • C:\Windows\SysWOW64\net.exe
        net stop serviceupdater
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3436
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop serviceupdater
          3⤵
            PID:448
        • C:\Windows\SysWOW64\installd.exe
          "C:\Windows\system32\installd.exe" nethfdrv
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:5056
        • C:\Windows\SysWOW64\nethtsrv.exe
          "C:\Windows\system32\nethtsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:764
        • C:\Windows\SysWOW64\netupdsrv.exe
          "C:\Windows\system32\netupdsrv.exe" -nfdi
          2⤵
          • Executes dropped EXE
          PID:2744
        • C:\Windows\SysWOW64\net.exe
          net start nethttpservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:224
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 start nethttpservice
            3⤵
              PID:1136
          • C:\Windows\SysWOW64\net.exe
            net start serviceupdater
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:2816
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 start serviceupdater
              3⤵
                PID:3044
          • C:\Windows\SysWOW64\nethtsrv.exe
            C:\Windows\SysWOW64\nethtsrv.exe
            1⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Modifies data under HKEY_USERS
            • Suspicious use of AdjustPrivilegeToken
            PID:3660
          • C:\Windows\SysWOW64\netupdsrv.exe
            C:\Windows\SysWOW64\netupdsrv.exe
            1⤵
            • Executes dropped EXE
            PID:4640

          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:\Users\Admin\AppData\Local\Temp\nszA06D.tmp\System.dll
            Filesize

            11KB

            MD5

            c17103ae9072a06da581dec998343fc1

            SHA1

            b72148c6bdfaada8b8c3f950e610ee7cf1da1f8d

            SHA256

            dc58d8ad81cacb0c1ed72e33bff8f23ea40b5252b5bb55d393a0903e6819ae2f

            SHA512

            d32a71aaef18e993f28096d536e41c4d016850721b31171513ce28bbd805a54fd290b7c3e9d935f72e676a1acfb4f0dcc89d95040a0dd29f2b6975855c18986f

          • C:\Users\Admin\AppData\Local\Temp\nszA06D.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nszA06D.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nszA06D.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nszA06D.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nszA06D.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nszA06D.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nszA06D.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

          • C:\Users\Admin\AppData\Local\Temp\nszA06D.tmp\nsExec.dll
            Filesize

            6KB

            MD5

            acc2b699edfea5bf5aae45aba3a41e96

            SHA1

            d2accf4d494e43ceb2cff69abe4dd17147d29cc2

            SHA256

            168a974eaa3f588d759db3f47c1a9fdc3494ba1fa1a73a84e5e3b2a4d58abd7e

            SHA512

            e29ea10ada98c71a18273b04f44f385b120d4e8473e441ce5748cfa44a23648814f2656f429b85440157988c88de776c6ac008dc38bf09cbb746c230a46c69fe

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

            106KB

            MD5

            ae439ce3464256061c50e2f02b85ec5d

            SHA1

            39129a5df8fdc1e6af2a175eb81c49d209cbcfe4

            SHA256

            21f6e441739ce51b8dd43b25cc8e54c8d82ee5fdb38bccab0cbc3115297181a2

            SHA512

            fb9dad37c76196778609f60c2faac31233868ba4cfa6b9dfa846f135a9cd169aed5c0486f9db2c9f4c4996638472540d8e2149355a3899682632eb8eec8b1903

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

            106KB

            MD5

            ae439ce3464256061c50e2f02b85ec5d

            SHA1

            39129a5df8fdc1e6af2a175eb81c49d209cbcfe4

            SHA256

            21f6e441739ce51b8dd43b25cc8e54c8d82ee5fdb38bccab0cbc3115297181a2

            SHA512

            fb9dad37c76196778609f60c2faac31233868ba4cfa6b9dfa846f135a9cd169aed5c0486f9db2c9f4c4996638472540d8e2149355a3899682632eb8eec8b1903

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

            106KB

            MD5

            ae439ce3464256061c50e2f02b85ec5d

            SHA1

            39129a5df8fdc1e6af2a175eb81c49d209cbcfe4

            SHA256

            21f6e441739ce51b8dd43b25cc8e54c8d82ee5fdb38bccab0cbc3115297181a2

            SHA512

            fb9dad37c76196778609f60c2faac31233868ba4cfa6b9dfa846f135a9cd169aed5c0486f9db2c9f4c4996638472540d8e2149355a3899682632eb8eec8b1903

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

            106KB

            MD5

            ae439ce3464256061c50e2f02b85ec5d

            SHA1

            39129a5df8fdc1e6af2a175eb81c49d209cbcfe4

            SHA256

            21f6e441739ce51b8dd43b25cc8e54c8d82ee5fdb38bccab0cbc3115297181a2

            SHA512

            fb9dad37c76196778609f60c2faac31233868ba4cfa6b9dfa846f135a9cd169aed5c0486f9db2c9f4c4996638472540d8e2149355a3899682632eb8eec8b1903

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

            244KB

            MD5

            742d657ac97334b15244ea84757aaf16

            SHA1

            26dd96a793e6c1d7e358cbe46f6d578208b14860

            SHA256

            14fc037733327a47d55cbd08422cdc8e470e605ea9dcb7f53187f60d4a7f6066

            SHA512

            f7705807475dd32db0e4ebcc6cc889f09f23148acedff6b42c7a1d5b3e36a27edd76410e5279a6d17b1e95e0e4782ccb978ea4794e2f3a1de05696d6d3ed5395

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

            244KB

            MD5

            742d657ac97334b15244ea84757aaf16

            SHA1

            26dd96a793e6c1d7e358cbe46f6d578208b14860

            SHA256

            14fc037733327a47d55cbd08422cdc8e470e605ea9dcb7f53187f60d4a7f6066

            SHA512

            f7705807475dd32db0e4ebcc6cc889f09f23148acedff6b42c7a1d5b3e36a27edd76410e5279a6d17b1e95e0e4782ccb978ea4794e2f3a1de05696d6d3ed5395

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

            244KB

            MD5

            742d657ac97334b15244ea84757aaf16

            SHA1

            26dd96a793e6c1d7e358cbe46f6d578208b14860

            SHA256

            14fc037733327a47d55cbd08422cdc8e470e605ea9dcb7f53187f60d4a7f6066

            SHA512

            f7705807475dd32db0e4ebcc6cc889f09f23148acedff6b42c7a1d5b3e36a27edd76410e5279a6d17b1e95e0e4782ccb978ea4794e2f3a1de05696d6d3ed5395

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

            108KB

            MD5

            6e878f7d1fe83480aad50bc3c2ca72c6

            SHA1

            42f5f76f6e2da14dbd6c81d62a5c7616fbcbb2ad

            SHA256

            4c8c8c86d6b4e796330aec96a67b91c8710332e1252821860dcb94ed40c5ef44

            SHA512

            91f062e2b878ec76d309d0dd0fc1dfee07709f409edfb28eaec8caa1c35f7457518593516f442f9b2276bb8205b89c3283739810dbc3e7bcdde315b5079403fc

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

            108KB

            MD5

            6e878f7d1fe83480aad50bc3c2ca72c6

            SHA1

            42f5f76f6e2da14dbd6c81d62a5c7616fbcbb2ad

            SHA256

            4c8c8c86d6b4e796330aec96a67b91c8710332e1252821860dcb94ed40c5ef44

            SHA512

            91f062e2b878ec76d309d0dd0fc1dfee07709f409edfb28eaec8caa1c35f7457518593516f442f9b2276bb8205b89c3283739810dbc3e7bcdde315b5079403fc

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

            176KB

            MD5

            e54bda2652d9bba03dcc321a7b8e9e15

            SHA1

            f2760452c0d67574c31f400a4e6c7e2d4fcf80f7

            SHA256

            112dc28abf07179b21b39c7dfb4ffbc709bf7369d9f581919e177acbea142815

            SHA512

            8dbe0cc8652eda7646dfe4ed807f8dbd03cf290c605519cb9401641c83a040eb9f9679f57903d8fc56a2e0057f47f7fae48b99ec51ece799868758b638da6cc9

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

            176KB

            MD5

            e54bda2652d9bba03dcc321a7b8e9e15

            SHA1

            f2760452c0d67574c31f400a4e6c7e2d4fcf80f7

            SHA256

            112dc28abf07179b21b39c7dfb4ffbc709bf7369d9f581919e177acbea142815

            SHA512

            8dbe0cc8652eda7646dfe4ed807f8dbd03cf290c605519cb9401641c83a040eb9f9679f57903d8fc56a2e0057f47f7fae48b99ec51ece799868758b638da6cc9

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

            176KB

            MD5

            e54bda2652d9bba03dcc321a7b8e9e15

            SHA1

            f2760452c0d67574c31f400a4e6c7e2d4fcf80f7

            SHA256

            112dc28abf07179b21b39c7dfb4ffbc709bf7369d9f581919e177acbea142815

            SHA512

            8dbe0cc8652eda7646dfe4ed807f8dbd03cf290c605519cb9401641c83a040eb9f9679f57903d8fc56a2e0057f47f7fae48b99ec51ece799868758b638da6cc9

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

            158KB

            MD5

            718cce05b2a905469b19a9156c5d31f4

            SHA1

            56e57af95164d686db6f608cd7ed022010d165e6

            SHA256

            f66cce2e05d8004de44cc208cb8ce067b90d21194df5f997b9288025bf308fb9

            SHA512

            83ffb328f61342dfb895ed6c1097cba0349d90bfd25f205f14fd49236db7e5189a46285b4d0811848418294b7bb26d0ad7a1bef0185124241507868c302098cd

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

            158KB

            MD5

            718cce05b2a905469b19a9156c5d31f4

            SHA1

            56e57af95164d686db6f608cd7ed022010d165e6

            SHA256

            f66cce2e05d8004de44cc208cb8ce067b90d21194df5f997b9288025bf308fb9

            SHA512

            83ffb328f61342dfb895ed6c1097cba0349d90bfd25f205f14fd49236db7e5189a46285b4d0811848418294b7bb26d0ad7a1bef0185124241507868c302098cd

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

            158KB

            MD5

            718cce05b2a905469b19a9156c5d31f4

            SHA1

            56e57af95164d686db6f608cd7ed022010d165e6

            SHA256

            f66cce2e05d8004de44cc208cb8ce067b90d21194df5f997b9288025bf308fb9

            SHA512

            83ffb328f61342dfb895ed6c1097cba0349d90bfd25f205f14fd49236db7e5189a46285b4d0811848418294b7bb26d0ad7a1bef0185124241507868c302098cd

          • memory/224-157-0x0000000000000000-mapping.dmp
          • memory/448-140-0x0000000000000000-mapping.dmp
          • memory/764-146-0x0000000000000000-mapping.dmp
          • memory/1136-158-0x0000000000000000-mapping.dmp
          • memory/2744-152-0x0000000000000000-mapping.dmp
          • memory/2816-164-0x0000000000000000-mapping.dmp
          • memory/3044-165-0x0000000000000000-mapping.dmp
          • memory/3436-139-0x0000000000000000-mapping.dmp
          • memory/4860-136-0x0000000000000000-mapping.dmp
          • memory/4948-135-0x0000000000000000-mapping.dmp
          • memory/5056-141-0x0000000000000000-mapping.dmp