Analysis

  • max time kernel
    45s
  • max time network
    18s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    22/10/2023, 10:44

General

  • Target

    NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe

  • Size

    20.8MB

  • MD5

    74b495ebe781e84c4057267b9c0458bf

  • SHA1

    ad6167c9764d1415b1e87c195c0ea496bb206ccb

  • SHA256

    e1a8fd713a3bb5586ae9653f1c68a16b9142d7e21f80fe5a6395e8c908064e71

  • SHA512

    20b2941fb9adfe5c5234c354f07c4b3de825fd7d06f969ea541c52eab12bd2e78ad6192e2a8dbf21f9463168e88cef16006424f950e55b4e4fbcd251f7b45e7a

  • SSDEEP

    98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMh:9nwngnwnBRk

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Drops startup file 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops autorun.inf file 1 TTPs 3 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.2023-09-07_74b495ebe781e84c4057267b9c0458bf_ryuk_JC.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops startup file
    • Loads dropped DLL
    • Enumerates connected drives
    • Drops autorun.inf file
    • Drops file in System32 directory
    • Suspicious use of WriteProcessMemory
    PID:2824
    • C:\Windows\SysWOW64\HelpMe.exe
      C:\Windows\system32\HelpMe.exe
      2⤵
      • Modifies WinLogon for persistence
      • Drops startup file
      • Executes dropped EXE
      • Enumerates connected drives
      • Drops autorun.inf file
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      PID:3016

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\$Recycle.Bin\S-1-5-21-3185155662-718608226-894467740-1000\desktop.ini.exe

          Filesize

          20.8MB

          MD5

          646e90cd8a352dcbf250d38dc20f6dfa

          SHA1

          44f9123fa6b6102fb3633fa7ca5f2e8134a7da56

          SHA256

          a2b69b2849347a44613fb5d32c80e483b0ba2c411d3895bd360d0e1b34cd6d23

          SHA512

          b46828911e739dfc43c3f8332820ef7a993a54e0422b18e9ec8d3f692ffbdce4ba59da9f70434b2862b5b0219a0c4e41bb1e0cf12fb043f4e01d1d66d4d487fb

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          1KB

          MD5

          a2756f337cda33daaf111a73b9db859b

          SHA1

          aa0e03d02c992ded81340963b59f0c452fcd58c4

          SHA256

          2668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857

          SHA512

          c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          950B

          MD5

          64c1698d85478df4ee1d21c3b85e86be

          SHA1

          c9f4077effb59d6ebade50b1437f6b5a7df73aa2

          SHA256

          2a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d

          SHA512

          8db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          1KB

          MD5

          a2756f337cda33daaf111a73b9db859b

          SHA1

          aa0e03d02c992ded81340963b59f0c452fcd58c4

          SHA256

          2668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857

          SHA512

          c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          950B

          MD5

          64c1698d85478df4ee1d21c3b85e86be

          SHA1

          c9f4077effb59d6ebade50b1437f6b5a7df73aa2

          SHA256

          2a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d

          SHA512

          8db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          1KB

          MD5

          a2756f337cda33daaf111a73b9db859b

          SHA1

          aa0e03d02c992ded81340963b59f0c452fcd58c4

          SHA256

          2668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857

          SHA512

          c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          1KB

          MD5

          a2756f337cda33daaf111a73b9db859b

          SHA1

          aa0e03d02c992ded81340963b59f0c452fcd58c4

          SHA256

          2668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857

          SHA512

          c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          950B

          MD5

          64c1698d85478df4ee1d21c3b85e86be

          SHA1

          c9f4077effb59d6ebade50b1437f6b5a7df73aa2

          SHA256

          2a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d

          SHA512

          8db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          1KB

          MD5

          a2756f337cda33daaf111a73b9db859b

          SHA1

          aa0e03d02c992ded81340963b59f0c452fcd58c4

          SHA256

          2668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857

          SHA512

          c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          950B

          MD5

          64c1698d85478df4ee1d21c3b85e86be

          SHA1

          c9f4077effb59d6ebade50b1437f6b5a7df73aa2

          SHA256

          2a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d

          SHA512

          8db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          1KB

          MD5

          a2756f337cda33daaf111a73b9db859b

          SHA1

          aa0e03d02c992ded81340963b59f0c452fcd58c4

          SHA256

          2668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857

          SHA512

          c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          950B

          MD5

          64c1698d85478df4ee1d21c3b85e86be

          SHA1

          c9f4077effb59d6ebade50b1437f6b5a7df73aa2

          SHA256

          2a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d

          SHA512

          8db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          1KB

          MD5

          a2756f337cda33daaf111a73b9db859b

          SHA1

          aa0e03d02c992ded81340963b59f0c452fcd58c4

          SHA256

          2668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857

          SHA512

          c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          1KB

          MD5

          a2756f337cda33daaf111a73b9db859b

          SHA1

          aa0e03d02c992ded81340963b59f0c452fcd58c4

          SHA256

          2668e148f77387acf729ab7a84300bdad70a26928757156379e8f945329da857

          SHA512

          c92f1735d17c4d26565b7c16d999504d1e59dfdc860f5f7a7cdf86d983b4d02557824aa197610e2ee68d91402458111cc25b0428f7addbab22201c771032493b

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          950B

          MD5

          64c1698d85478df4ee1d21c3b85e86be

          SHA1

          c9f4077effb59d6ebade50b1437f6b5a7df73aa2

          SHA256

          2a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d

          SHA512

          8db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Soft.lnk

          Filesize

          950B

          MD5

          64c1698d85478df4ee1d21c3b85e86be

          SHA1

          c9f4077effb59d6ebade50b1437f6b5a7df73aa2

          SHA256

          2a37b10a2bc6235a89fdb1db6bfe7e2ed02d46cc1340d7e0cc78df7106303b4d

          SHA512

          8db5c38620d0ef713b82f9788a7a78274bbe5ff906dca6756d8e68c9fc9978cda75ddcca70cf5d4c9d47ca3df74b31bc6528dcff901fe0762fca006c9602ee19

        • C:\Windows\SysWOW64\HelpMe.exe

          Filesize

          20.8MB

          MD5

          fca43a513f65b0d0176b6b9f5fcc6139

          SHA1

          48ec0285453af9f2f4bf31d330293635c97af232

          SHA256

          a3e11d48ce3c4b9ef5b2acb0afc2a25e1a9e28aae934a2340e019e1fb34ef868

          SHA512

          959788a918544268020b1096da4b73ade98d068f906626dfaa50594d8fee51fd99945ee9a9b0f39b5e232f8cfeef7217391be434e5432d32c550ce851a131cd8

        • C:\Windows\SysWOW64\HelpMe.exe

          Filesize

          20.8MB

          MD5

          fca43a513f65b0d0176b6b9f5fcc6139

          SHA1

          48ec0285453af9f2f4bf31d330293635c97af232

          SHA256

          a3e11d48ce3c4b9ef5b2acb0afc2a25e1a9e28aae934a2340e019e1fb34ef868

          SHA512

          959788a918544268020b1096da4b73ade98d068f906626dfaa50594d8fee51fd99945ee9a9b0f39b5e232f8cfeef7217391be434e5432d32c550ce851a131cd8

        • C:\Windows\SysWOW64\HelpMe.exe

          Filesize

          20.8MB

          MD5

          fca43a513f65b0d0176b6b9f5fcc6139

          SHA1

          48ec0285453af9f2f4bf31d330293635c97af232

          SHA256

          a3e11d48ce3c4b9ef5b2acb0afc2a25e1a9e28aae934a2340e019e1fb34ef868

          SHA512

          959788a918544268020b1096da4b73ade98d068f906626dfaa50594d8fee51fd99945ee9a9b0f39b5e232f8cfeef7217391be434e5432d32c550ce851a131cd8

        • F:\AUTORUN.INF

          Filesize

          145B

          MD5

          ca13857b2fd3895a39f09d9dde3cca97

          SHA1

          8b78c5b2ec97c372ebdcef92d14b0998f8dd6dd0

          SHA256

          cfe448b4506a95b33b529efa88f1ac704d8bdf98a941c065650ead27609318ae

          SHA512

          55e5b5325968d1e5314527fb2d26012f5aae4a1c38e305417be273400cb1c6d0c22b85bddb501d7a5720a3f53bb5caf6ada8a7894232344c4f6c6ef85d226b47

        • F:\AutoRun.exe

          Filesize

          20.8MB

          MD5

          74b495ebe781e84c4057267b9c0458bf

          SHA1

          ad6167c9764d1415b1e87c195c0ea496bb206ccb

          SHA256

          e1a8fd713a3bb5586ae9653f1c68a16b9142d7e21f80fe5a6395e8c908064e71

          SHA512

          20b2941fb9adfe5c5234c354f07c4b3de825fd7d06f969ea541c52eab12bd2e78ad6192e2a8dbf21f9463168e88cef16006424f950e55b4e4fbcd251f7b45e7a

        • \Windows\SysWOW64\HelpMe.exe

          Filesize

          20.8MB

          MD5

          fca43a513f65b0d0176b6b9f5fcc6139

          SHA1

          48ec0285453af9f2f4bf31d330293635c97af232

          SHA256

          a3e11d48ce3c4b9ef5b2acb0afc2a25e1a9e28aae934a2340e019e1fb34ef868

          SHA512

          959788a918544268020b1096da4b73ade98d068f906626dfaa50594d8fee51fd99945ee9a9b0f39b5e232f8cfeef7217391be434e5432d32c550ce851a131cd8

        • \Windows\SysWOW64\HelpMe.exe

          Filesize

          20.8MB

          MD5

          fca43a513f65b0d0176b6b9f5fcc6139

          SHA1

          48ec0285453af9f2f4bf31d330293635c97af232

          SHA256

          a3e11d48ce3c4b9ef5b2acb0afc2a25e1a9e28aae934a2340e019e1fb34ef868

          SHA512

          959788a918544268020b1096da4b73ade98d068f906626dfaa50594d8fee51fd99945ee9a9b0f39b5e232f8cfeef7217391be434e5432d32c550ce851a131cd8

        • memory/2824-70-0x00000000001B0000-0x00000000001B1000-memory.dmp

          Filesize

          4KB

        • memory/2824-81-0x0000000001E70000-0x0000000001EEB000-memory.dmp

          Filesize

          492KB

        • memory/2824-0-0x0000000000400000-0x000000000047B000-memory.dmp

          Filesize

          492KB

        • memory/2824-65-0x0000000000400000-0x000000000047B000-memory.dmp

          Filesize

          492KB

        • memory/2824-9-0x0000000001E70000-0x0000000001EEB000-memory.dmp

          Filesize

          492KB

        • memory/2824-1-0x00000000001B0000-0x00000000001B1000-memory.dmp

          Filesize

          4KB

        • memory/3016-84-0x0000000000400000-0x000000000047B000-memory.dmp

          Filesize

          492KB

        • memory/3016-15-0x0000000000400000-0x000000000047B000-memory.dmp

          Filesize

          492KB

        • memory/3016-12-0x00000000001B0000-0x00000000001B1000-memory.dmp

          Filesize

          4KB