If the service is misconfigured, reset it to defaults:
to help Windows identify and pair specific smart cards with their required software. Common Contexts Antivirus Flags : Tools like Norton Power Eraser may sometimes flag the scfilter.sys
According to driver catalog repositories like DriverIdentifier , this particular GUID string is widely paired with generic smart card systems deployed across custom motherboard configurations, such as OEM builds by manufacturers like Gigabyte. Why Does It Show an Error in Device Manager?
What Is scfilter cid87d25e32ac0d4ef0b1e0502c6b7dfb77 ? A Closer Look at Filter IDs and URL Tracking scfilter cid87d25e32ac0d4ef0b1e0502c6b7dfb77
sc config scfilter start= demand
Have you encountered a strange filter ID in your logs? Share your experience in the comments below.
: If you see this string in reports related to high CPU usage or system lag, it may indicate a driver conflict or an issue with the physical security key rather than malware. If the service is misconfigured, reset it to
87D25E32-AC0D-4EF0-B1E0-502C6B7DFB77 : A decoded cryptographic GUID or historical ATR byte sequence unique to that specific model or brand of smart card chip. Troubleshooting a Missing Smart Card Driver
: If this activity is paired with suspicious network calls (e.g., to IP lookup services or known C2 domains) or the injection into explorer.exe , the sample is typically classified as a Information Stealer Security Recommendations Monitor Driver Loads : Use tools like to track unexpected processes loading scfilter.sys Sandbox Validation : For deep inspection, run suspicious binaries through an interactive sandbox
is an official Microsoft Windows kernel‑mode driver whose full name is the Smart card PnP Class Filter Driver (service name: scfilter ). Its job is to bridge the gap between a physical smart card reader and the operating system’s higher‑level smart card services. What Is scfilter cid87d25e32ac0d4ef0b1e0502c6b7dfb77
(Smart Card Filter Driver) is a standard Windows component, but its presence in sandbox logs typically indicates an analysis of how a process interacts with system drivers or attempts to bypass security controls. Technical Overview scfilter.sys is the Microsoft Smart Card Reader Filter Driver.
Thus, the value SCFILTER\CID_87d25e32ac0d4ef0b1e0502c6b7dfb77 is not a generic string—it is the .
If you're interested in using SC filters with CID87D25E32AC0D4EF0B1E0502C6B7DFB77, you'll need to follow these steps:
Identify your organization's card issuer (e.g., JaCarta, YubiKey, RuToken, Oberthur, Gemalto). Navigate to the official manufacturer download page.