Analysis

  • user interaction
    yes
  • max time kernel
    298s
  • max time network
    192s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    14/08/2026, 03:01

General

  • Target
    sulian.exe
  • Size 79.3MB
  • Sample260814-dhv4hatckc
  • SHA256 434719f479c926aea347d099a4bf929f8e0889e3b0cdaf0eda380c06b37643ea
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies Windows Firewall 2 TTPs 12 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 64 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 Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 36 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Inno Setup is an open-source installation builder for Windows applications. 3 IoCs

    Inno Setup installer

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 6 IoCs
  • Suspicious use of SendNotifyMessage 5 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\sulian.exe
    "C:\Users\Admin\AppData\Local\Temp\sulian.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3720
    • C:\Users\Admin\AppData\Local\Temp\is-1RWGR5UFZR.tmp\sulian.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-1RWGR5UFZR.tmp\sulian.tmp" /SL5="$50216,81846286,890880,C:\Users\Admin\AppData\Local\Temp\sulian.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:520
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall delete rule name="速连 Xray 本地 TCP"
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:1640
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall delete rule name="速连 Xray 本地 UDP"
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:852
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall delete rule name="速连应用本地 TCP 出站"
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:1788
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall delete rule name="速连应用本地 TCP 入站"
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:3140
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall delete rule name="速连 Xray 出站 TCP"
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:1836
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall delete rule name="速连 Xray 出站 UDP"
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:1456
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall add rule name="速连 Xray 本地 TCP" dir=in action=allow program="C:\Program Files\SpeedLink\resources\bin\xray\xray.exe" protocol=TCP localip=127.0.0.1 remoteip=127.0.0.1 profile=any enable=yes
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:4412
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall add rule name="速连 Xray 本地 UDP" dir=in action=allow program="C:\Program Files\SpeedLink\resources\bin\xray\xray.exe" protocol=UDP localip=127.0.0.1 remoteip=127.0.0.1 profile=any enable=yes
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:4252
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall add rule name="速连应用本地 TCP 出站" dir=out action=allow program="C:\Program Files\SpeedLink\SpeedLink.exe" protocol=TCP localip=127.0.0.1 remoteip=127.0.0.1 profile=any enable=yes
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:1428
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall add rule name="速连应用本地 TCP 入站" dir=in action=allow program="C:\Program Files\SpeedLink\SpeedLink.exe" protocol=TCP localip=127.0.0.1 remoteip=127.0.0.1 profile=any enable=yes
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:5052
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall add rule name="速连 Xray 出站 TCP" dir=out action=allow program="C:\Program Files\SpeedLink\resources\bin\xray\xray.exe" protocol=TCP profile=any enable=yes
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:3440
      • C:\Windows\system32\netsh.exe
        "C:\Windows\system32\netsh.exe" advfirewall firewall add rule name="速连 Xray 出站 UDP" dir=out action=allow program="C:\Program Files\SpeedLink\resources\bin\xray\xray.exe" protocol=UDP profile=any enable=yes
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:4312
      • C:\Program Files\SpeedLink\SpeedLink.exe
        "C:\Program Files\SpeedLink\SpeedLink.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        PID:4436

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        DirectWriteForwarder.dll

        • Path C:\Program Files\SpeedLink\DirectWriteForwarder.dll
        • Size 493KB
        • SHA256 e585360ca511a352f0b53438a24b8f588b3ae7fac73a8f9abe1e9c18c8affc09
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Microsoft.Win32.Primitives.dll

        • Path C:\Program Files\SpeedLink\Microsoft.Win32.Primitives.dll
        • Size 15KB
        • SHA256 0ed8917deff4e38def167b11ad222354bb463ba8092fc14710f4e59b4f7f99da
        • MD5 SHA1 SHA512 SSDEEP TLSH

        Microsoft.Win32.Registry.dll

        • Path C:\Program Files\SpeedLink\Microsoft.Win32.Registry.dll
        • Size 113KB
        • SHA256 a4244204f35b3f9afb9321322a4aa140b082dcf6b7744f9ceb2525c7a0dc1895
        • MD5 SHA1 SHA512 SSDEEP TLSH

        PresentationCore.dll

        • Path C:\Program Files\SpeedLink\PresentationCore.dll
        • Size 7.9MB
        • SHA256 96a329ae739f41626263b52e9d4179f55a49c5be1ab0f0285c7b95ff119eb07d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        PresentationFramework.dll

        • Path C:\Program Files\SpeedLink\PresentationFramework.dll
        • Size 15.1MB
        • SHA256 95323c3fb3370d53a2a8ff288327ee5186b006b18c595d54a0f8495340d066c3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        PresentationNative_cor3.dll

        • Path C:\Program Files\SpeedLink\PresentationNative_cor3.dll
        • Size 1.2MB
        • SHA256 7fec1277620afb3100c1025e018e9f6dbd4eb495c2b1370b2ad9c6020066faa9
        • MD5 SHA1 SHA512 SSDEEP TLSH

        SpeedLink.deps.json

        • Path C:\Program Files\SpeedLink\SpeedLink.deps.json
        • Size 60KB
        • SHA256 44a5ee52dff38e6eeaa6d7df35bf064cbe4048900925815130c6bac2a5a8db96
        • MD5 SHA1 SHA512 SSDEEP TLSH

        SpeedLink.dll

        • Path C:\Program Files\SpeedLink\SpeedLink.dll
        • Size 5.4MB
        • SHA256 315865d86fe50e2489f637ca0132240b1099a88233e657eb2f7eb81ad01f9fbe
        • MD5 SHA1 SHA512 SSDEEP TLSH

        SpeedLink.exe

        • Path C:\Program Files\SpeedLink\SpeedLink.exe
        • Size 210KB
        • SHA256 ac24b0fa226ed29d450609683828d657c22372e17c68b4b225b3269df85afb4c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        SpeedLink.runtimeconfig.json

        • Path C:\Program Files\SpeedLink\SpeedLink.runtimeconfig.json
        • Size 882B
        • SHA256 9905ab014781839e4253d730618601adf6ad24004e830a6d8ab497e6c2b38b65
        • MD5 SHA1 SHA512 TLSH

        System.Collections.NonGeneric.dll

        • Path C:\Program Files\SpeedLink\System.Collections.NonGeneric.dll
        • Size 101KB
        • SHA256 6570a4691cafd9b56c24042ad8ba0ed60304ef2aad4a4ee680b105f57abcde8d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Collections.Specialized.dll

        • Path C:\Program Files\SpeedLink\System.Collections.Specialized.dll
        • Size 101KB
        • SHA256 fcb36f4fa19d63c7304e033b27268722b478d1c1687dc28fd3036c9dd913abc4
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Collections.dll

        • Path C:\Program Files\SpeedLink\System.Collections.dll
        • Size 289KB
        • SHA256 22f81315a6dbe69080c917faffc9d99f8ebd0d20dffad432e26d11f9c14aaf2c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.ComponentModel.Primitives.dll

        • Path C:\Program Files\SpeedLink\System.ComponentModel.Primitives.dll
        • Size 77KB
        • SHA256 3324d2a3e9f7f285f1d325061bd595b1f3a784515830d2fab5cebba9c42e856c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Configuration.ConfigurationManager.dll

        • Path C:\Program Files\SpeedLink\System.Configuration.ConfigurationManager.dll
        • Size 1021KB
        • SHA256 0ff9221244b3f0a620400ca2a1a7d962aa713907a304bea1cd0dbe8bad0f750f
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Diagnostics.Debug.dll

        • Path C:\Program Files\SpeedLink\System.Diagnostics.Debug.dll
        • Size 15KB
        • SHA256 5b7d49214fe831d4f54c30937d223bf1a72c180f66ace8fab153f39e9f726bf3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.IO.Packaging.dll

        • Path C:\Program Files\SpeedLink\System.IO.Packaging.dll
        • Size 313KB
        • SHA256 92b115060814437134fe3c667b2fd0f5b49e389db66e5fe02b4c01a48f645b03
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Memory.dll

        • Path C:\Program Files\SpeedLink\System.Memory.dll
        • Size 157KB
        • SHA256 1078a6c41bb1ce7ac34143318dea476b85ff174f9e69af8e43979bdf8f88a8c4
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Private.CoreLib.dll

        • Path C:\Program Files\SpeedLink\System.Private.CoreLib.dll
        • Size 15.3MB
        • SHA256 5b6700e2802afdb2cc4863b096760a66442e89fd6ee5edb718c697ae5cf33ddc
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Private.Uri.dll

        • Path C:\Program Files\SpeedLink\System.Private.Uri.dll
        • Size 249KB
        • SHA256 5541bb33861941addd700eacdf9a206c49da1a0382bb6725d50eda964b656c36
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Private.Xml.dll

        • Path C:\Program Files\SpeedLink\System.Private.Xml.dll
        • Size 7.4MB
        • SHA256 99098e70118247ebcc8c466e737c326a1fa837cb23d1e3429d9d1f0d395cafdb
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Runtime.CompilerServices.VisualC.dll

        • Path C:\Program Files\SpeedLink\System.Runtime.CompilerServices.VisualC.dll
        • Size 29KB
        • SHA256 bf3e787aef846dc36c7f4f4bc678e27cc3b39daba14ab1a223f179823d27ed29
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Runtime.Extensions.dll

        • Path C:\Program Files\SpeedLink\System.Runtime.Extensions.dll
        • Size 17KB
        • SHA256 242fe2a65b3ea3fd42ff29106d54a8b7c5efafcd971e5b9b13f2f0c4f7d3567c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Runtime.InteropServices.dll

        • Path C:\Program Files\SpeedLink\System.Runtime.InteropServices.dll
        • Size 109KB
        • SHA256 b6231cd2114de5d310fa8665715b39a08c0f045da62c66648dc948ae757b5b4d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Runtime.dll

        • Path C:\Program Files\SpeedLink\System.Runtime.dll
        • Size 43KB
        • SHA256 7f87ad22ac2ec701604a68646bcf4aa1f5c43ad6744c6d01bfaa9e9667e5595e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Threading.Thread.dll

        • Path C:\Program Files\SpeedLink\System.Threading.Thread.dll
        • Size 15KB
        • SHA256 bd46c23f6a765530df2a9971c6f93993587652f8bcc2c15b4673f8d16b4300b8
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Threading.dll

        • Path C:\Program Files\SpeedLink\System.Threading.dll
        • Size 81KB
        • SHA256 73e42dc61faa190b99da8e13234ecf5276468ba43da277b957e595c696329598
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Xaml.dll

        • Path C:\Program Files\SpeedLink\System.Xaml.dll
        • Size 1.3MB
        • SHA256 0c47b6d98365094016d92fd4831119afd3069ce8a1497190a78183b4531bfc1a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.Xml.ReaderWriter.dll

        • Path C:\Program Files\SpeedLink\System.Xml.ReaderWriter.dll
        • Size 21KB
        • SHA256 dd4fc7436ca8f6076b977d82c2b36a890d0c6357893ef87a3882e4a1f7945328
        • MD5 SHA1 SHA512 SSDEEP TLSH

        WindowsBase.dll

        • Path C:\Program Files\SpeedLink\WindowsBase.dll
        • Size 2.1MB
        • SHA256 09e57985154139bc0c3b50b9de5a57078864199874479bbef87929bec5e82401
        • MD5 SHA1 SHA512 SSDEEP TLSH

        clrjit.dll

        • Path C:\Program Files\SpeedLink\clrjit.dll
        • Size 2.0MB
        • SHA256 18fe968846117d13edf3262bcb305ca28f678742a3281f8b4228a44047966f79
        • MD5 SHA1 SHA512 SSDEEP TLSH

        coreclr.dll

        • Path C:\Program Files\SpeedLink\coreclr.dll
        • Size 4.4MB
        • SHA256 85135fcf132fae2c3e03d3480dfbb51f910e78e8a6c35ffa367ea33b243216d7
        • MD5 SHA1 SHA512 SSDEEP TLSH

        speedlink.json.tmp

        • Path C:\Program Files\SpeedLink\guiConfigs\speedlink.json.tmp
        • Size 42KB
        • SHA256 32344455fb5fcc02a65ceed96fea677c95b4d92335c61a69960d68caf0c95c7a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        hostfxr.dll

        • Path C:\Program Files\SpeedLink\hostfxr.dll
        • Size 370KB
        • SHA256 dec56b41cf09cfcae002a3bb752b0b381c68b6217ed9e4b41b1ac2b645b5fdc5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        hostpolicy.dll

        • Path C:\Program Files\SpeedLink\hostpolicy.dll
        • Size 369KB
        • SHA256 385c3c4cddab07e1763a1fb1f978c57e31bb0f478b30b4c535ca1a3db50d28db
        • MD5 SHA1 SHA512 SSDEEP TLSH

        sulian.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-1RWGR5UFZR.tmp\sulian.tmp
        • Size 4.2MB
        • SHA256 7aee841fc072ba60c1b7e2fbfba069fe66b4d389080b02c0d00c6ab7d53302f4
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/520-13-0x0000000000020000-0x0000000000463000-memory.dmp

        memory/520-1111-0x0000000000020000-0x0000000000463000-memory.dmp

        memory/520-956-0x0000000000020000-0x0000000000463000-memory.dmp

        memory/520-20-0x0000000000020000-0x0000000000463000-memory.dmp

        memory/520-1187-0x0000000000020000-0x0000000000463000-memory.dmp

        memory/520-7-0x0000000000020000-0x0000000000463000-memory.dmp

        memory/520-8-0x0000000003670000-0x0000000003671000-memory.dmp

        memory/520-5-0x0000000003670000-0x0000000003671000-memory.dmp

        memory/520-1147-0x0000000000020000-0x0000000000463000-memory.dmp

        memory/3720-6-0x0000000000360000-0x0000000000448000-memory.dmp

        memory/3720-0-0x0000000000360000-0x0000000000448000-memory.dmp

        memory/3720-1188-0x0000000000360000-0x0000000000448000-memory.dmp