SIhost question


Sir_George

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I have noticed that sometimes the "SIhost.exe" is running for long periods of time and consumes about 12% to 14% of my CPU. If I shutdown and restart it doesn't start again when I reboot. I have already verified that it is a genuine MS file, so it's not malware from what I can establish. Anyone know why this is happening. It doesn't cause a problem, other than to annoy me.
 

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    Microcenter B677
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    ASRock H310CM-HDV/M.2
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The-Hive

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Have a look at this page, It tell you you a lot about the file and rouge versions, however I wouldn't run a scan from it, find one on line if you wish
 

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    Windows 11 Pro
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    Laptop
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    Alienware Area 51m R2
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    10th Gen Core i9 10900K
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    32GB
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    Geforce RTX 2080 Super
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    Dell Inspiron 3501
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Anixx

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The information on that linked page is manifestly incorrect, for instance, the claims that "The file sihost.exe is located in a subfolder of the user's profile folder", "The program has a visible window.", "It is not a Windows system file.", "It is a file with no information about its developer.", etc.
 

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Sir_George

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The information on that linked page is manifestly incorrect, for instance, the claims that "The file sihost.exe is located in a subfolder of the user's profile folder", "The program has a visible window.", "It is not a Windows system file.", "It is a file with no information about its developer.", etc.
The statements in the website are claiming that if any of the following exist, the file is suspect, see quote below;

How to recognize suspicious variants?

  • If sihost.exe is located in a subfolder of the user's profile folder, the security rating is 63% dangerous. The file size is 70,144 bytes (21% of all occurrences), 69,120 bytes and 7 more variants. The program has a visible window. Sihost.exe is not a Windows system file. There is no file information. The file is a Windows scheduled tasks.
  • If sihost.exe is located in a subfolder of "C:\Program Files", the security rating is 81% dangerous. The file size is 309,040 bytes (40% of all occurrences), 316,968 bytes, 315,432 bytes or 72,704 bytes. Sihost.exe is not a Windows core file. There is no information about the author of the file. You can uninstall this program in the Control Panel. The program has no visible window. Sihost.exe is digitally signed. It can change the behavior of other programs or manipulate other programs. The process is a hidden stealth process. Sihost.exe is able to monitor applications and manipulate other programs.
    Uninstalling this variant: If you experience any issues with installation of sihost.exe, you may want to contact www.searchinform.ru to assist you or remove the entire program MSXML using Windows Control Panel.
  • If sihost.exe is located in the Windows folder for temporary files, the security rating is 84% dangerous. The file size is 18,944 bytes.
  • If sihost.exe is located in a subfolder of Windows folder for temporary files, the security rating is 68% dangerous. The file size is 5,632 bytes.
  • If sihost.exe is located in a subfolder of C:\Windows, the security rating is 16% dangerous. The file size is 106,496 bytes.
I am not truly concerned about the validity of the file, just curious about why it is running for prolonged periods of time. Nothing in my web search turned up any explanation. I had seen the same site referenced by "The-Hive" in his post, but as I stated it didn't provide any explanation for why the file is running for prolonged periods of time.
 

My Computer

System One

  • OS
    Windows 11 Professional
    Computer type
    PC/Desktop
    Manufacturer/Model
    Microcenter B677
    CPU
    Intel Core i5-9400
    Motherboard
    ASRock H310CM-HDV/M.2
    Memory
    32GB
    Graphics Card(s)
    Integrated Intel UHD Graphics 630
    Sound Card
    Intel Kaby Lake - High Definition Audio / cAVS (Audio, Voice, Speech) [A0]
    Monitor(s) Displays
    LG Model: GSM59F1
    Screen Resolution
    2560x1080
    Case
    Lian Li 205M
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    Kaspersky AV

clam1952

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Should be a genuine system file.

Here you go. located in C:\Windows\System32

1643929770252.png
 

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System One System Two

  • OS
    Windows 11 21H2 OS Build 22621.1
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    PC/Desktop
    Manufacturer/Model
    Self Build
    CPU
    AMD Ryzen 7 3800X
    Motherboard
    Asus PRIME B350-PLUS
    Memory
    16GB Corsair Vengeance LPX DDR4 @3000Mhz
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    ASUS - GeForce RTX 3070 Ti 8 GB TUF GAMING OC
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    On Board Realtec
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    Acer KA241
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    1920 x 1080 @60Hz
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    240GB PNY CS900 SSD - OS
    2 x 1TB Crucial MX500 SSD
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    2TB Seagate ST2000DM001-1ER164
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    4TB Seagate ST4000DM000-1F2168
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    750 Watt Corsair TX750 Plus
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    Cooler Master 690 III
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    Akasa AK98 5 Case Fans
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    Logitech K270 - wireless
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    Logitech - M185 wireless
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    BT Fibre 75 Mbps
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    Firefox
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    Windows Defender
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    Use hardware KVM to switch monitors on three PCs and software (input director) to use mouse and keyboard on all 4 PCs.
  • Operating System
    Windows 11 Pro 21H2 build 22000.675
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Inspiron 3881 - modified with SFX PSU fitted internally
    CPU
    Intel i5 - 10400
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    Dell 032w55 version A00
    Memory
    16GB of HyperX Fury @ 2133 Mhz
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    EVGA 6GB GTX 1060.
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    Builtin
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    ACER KA241
    Screen Resolution
    1920x 1080 @60Hz
    Hard Drives
    256GB SK hynix NVMe
    1TB Western Digital WD10EZEX-75WN4A1
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    Modular 450 Watt Corsair SF450 Platinum ( Mod to replace the Dell 265 Watt PSU)
    Case
    Inspiron Small Desktop
    Cooling
    Dell stock cooler
    Mouse
    Dell
    Keyboard
    Dell
    Internet Speed
    BT Fibre 75 Mbps
    Browser
    Firefox
    Antivirus
    Windows Defender
    Other Info
    Use hardware KVM to switch monitors on three PCs and software (input director) to use mouse and keyboard on all 4 PCs.
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