In the architecture of Windows operating systems, scfilter (Smart Card PnP Class Filter Driver) serves as a critical bridge between physical smart card hardware and the software applications that require secure authentication. When a user inserts a smart card—whether for digital signatures, disk encryption (like BitLocker), or corporate network login—the scfilter driver is responsible for identifying the card and ensuring that the appropriate minidriver is loaded.
scfilter operates on reassembled TCP streams, not individual packets.87d25e32ac0d4ef0b1e0502c6b7dfb77) likely maps to a specific signature / pattern database entry inside Suricata’s scfilter module.What it might be
This hash is likely generated from a specific URL, email attachment hash, or rule set. When a request triggers a rule, the filter logs this CID to identify which policy was applied (e.g., block, allow, quarantine). scfilter cid87d25e32ac0d4ef0b1e0502c6b7dfb77
Here’s a solid, technical write‑up for the Suricata scfilter rule with the CID 87d25e32ac0d4ef0b1e0502c6b7dfb77. In the architecture of Windows operating systems, scfilter
System Visibility: You can view these identifiers by checking the "Details" tab under the Smart Card properties in the Windows Device Manager. Troubleshooting scfilter Errors scfilter operates on reassembled TCP streams , not
Smart Card Plug and Play - Windows drivers | Microsoft Learn