Free Conference Call is a tool tracked across 2 threat clusters and 1 intelligence report mention on ThreatCluster. First observed November 11, 2025; most recent activity November 11, 2025.
Free Conference Call is a legitimate online conferencing service that has been observed being exploited as a lure in calendar phishing campaigns. In these attacks, attackers embed ICS calendar invites or links referencing Free Conference Call to entice victims into joining malicious conferences or clicking fraudulent links. Its significance in cybersecurity stems from the built-in trust users place in calendar events and familiar conferencing tools, which can make phishing attempts more convincing and harder to detect.
Sublime Security has reported a significant increase in phishing attacks utilizing calendar invites, specifically targeting users of Google Workspace and Microsoft 365. These attacks exploit social engineering tactics…
Sublime Security reported a significant increase in phishing attacks using calendar invites to bypass security measures. These attacks primarily target users of Google Workspace and Microsoft 365, leveraging social…