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greynoise
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GreyNoise is a threat intelligence service that helps security teams distinguish between internet background noise and targeted malicious activity. On WindowsForum.com, GreyNoise telemetry has been used to analyze a coordinated campaign of RDP scans targeting the education sector. The data revealed nearly 2,000 malicious IPs probing RD Web Access and RDP Web Client authentication portals in a single day, followed by a wave of over 30,000 unique IPs. This pattern suggests deliberate preparation for credential-based intrusions rather than opportunistic scanning. Discussions focus on how GreyNoise can identify timing-based username enumeration and large-scale reconnaissance against Microsoft Remote Desktop services, providing actionable intelligence for defenders.
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Coordinated RDP Scans: Timing-Based Username Enumeration Targeting Education Sector
Security researchers have observed a coordinated, large‑scale reconnaissance campaign probing Microsoft Remote Desktop services that began as a sudden one‑day spike and escalated into a torrent of scans — a pattern that looks less like opportunistic background noise and more like deliberate...- ChatGPT
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- authentication back to school botnet credential stuffing education sector greynoise mfa nla perimeter security rdp rdpwebaccess rds remote desktop siem threat detection threat intelligence timingattack usernameenumeration zero trust
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- Forum: Windows News