Mimecast, which provides email management systems, updates that the hacker was able to hack into the company’s systems and access customer information.
According to the company, the hacker was able to gain access to a certificate used to identify Mimecast services located on Microsoft’s server.
The company also states that all customers who may have been harmed have been updated and it also asks all customers of the company to replace the existing certificate in their possession with a new certificate issued by the company.
The breach was identified by Microsoft, which updated Mimecast that an unidentified source accessed the company’s servers.
According to DZNet: Β Mimecast says hackers abused one of its certificates to access Microsoft accounts.
Mimecast, a provider of email management software, said learned of the security incident from Microsoft.
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The Rising Threat of Phishing β How Clever Scammers Exploit Trust
π¨ Phishing Attacks Are Getting Smarter
π‘ Recent campaigns targeting Booking.com users demonstrate how attackers exploit trust and familiarity to steal credentials.
β οΈ Personalized emails referencing recent bookings make it nearly impossible to distinguish legitimate communications from malicious ones.
π Human behavior remains the primary vulnerability β clicking links or providing credentials opens doors for attackers.
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π Free Insider Threat Detection Tools CISOs Canβt Ignore π
Not every threat comes from the outside β some of the most costly breaches start with insiders, whether accidental or malicious. The good news? There are free and open-source tools CISOs can use today to strengthen insider threat visibility.
Here are some to explore:
1οΈβ£ OSSEC β Open-source HIDS that monitors log files, rootkits, registry changes, and suspicious activity.
π https://www.ossec.net
2οΈβ£ Wazuh β SIEM + threat detection platform with powerful log analysis and insider risk visibility.
π https://wazuh.com
3οΈβ£ Graylog (Open) β Log management for monitoring anomalous patterns that may indicate insider misuse.
π https://www.graylog.org
4οΈβ£ Zeek (formerly Bro) β Network monitoring framework that can flag unusual internal data flows.
π https://zeek.org
5οΈβ£ TheHive β Open-source SOC platform for incident response with insider threat detection workflows.
π https://thehive-project.org
6οΈβ£ Prelude OSS β Hybrid IDS that supports insider activity monitoring and alert correlation.
π https://www.prelude-siem.org
7οΈβ£ Sysmon (Microsoft Sysinternals) β Tracks detailed process, file, and registry activity for insider behavior detection.
π https://learn.microsoft.com/en-us/sysinternals/downloads/sysmon
β‘ Takeaway: Insider threats are harder to spot than external attacks because they often look like legitimate activity. These free tools give CISOs eyes inside the perimeter without blowing budgets.
At AUMINT.io, we go further β by simulating social engineering and insider-like attack vectors to see how employees react, then delivering targeted awareness to stop the threat at its source.
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Manufacturingβs Hidden Cybersecurity Crisis β How to Stay Ahead
π¨ Manufacturing Faces Escalating Cyber Risks
π‘ Cyberattacks on manufacturing are increasing in frequency and severity, targeting production, supply chains, and IP.
β οΈ Downtime, regulatory penalties, and reputational damage make these breaches more than just financial losses.
π Human factors remain the weakest link β social engineering and insider threats bypass traditional security measures.
π₯ Proactive, human-focused solutions are critical to detect vulnerabilities before attackers exploit them.
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