Just Another Blue TeamerMar 31, 2023

Happy Friday everyone, not only did we make it to the end of the week but to the end of March! Today's #readoftheday is brought to you by Proofpoint. They report on a threat actor, #TA473 (aka Winter Vivern & UAC-0114) and how they leveraged a vulnerability in public facing Zimbra hosted webmail portals to conduct espionage campaigns against NATO personnel. I hope you have a wonderful weekend and Happy Hunting!

Exploitation is a Dish Best Served Cold: Winter Vivern Uses Known Zimbra Vulnerability to Target Webmail Portals of NATO-Aligned Governments in Europe
https://www.proofpoint.com/us/blog/threat-insight/exploitation-dish-best-served-cold-winter-vivern-uses-known-zimbra-vulnerability

#CyberSecurity #ITSecurity #InfoSec #BlueTeam #ThreatIntel #ThreatHunting #ThreatDetection #HappyHunting

Exploitation is a Dish Best Served Cold: Winter Vivern Uses Known Zimbra Vulnerability to Target Webmail Portals of NATO-Aligned Governments in Europe | Proofpoint US

Key Takeaways Proofpoint has observed recent espionage-related activity by TA473, including yet to be reported instances of TA473 targeting US elected officials and staffers.

Proofpoint
Mathew J. SchwartzMar 30, 2023

Phishing campaign tied to Russia/Belarus-supporting #cyberespionage team #TA473 (aka #WinterVivern, #UAC-0114) demonstrates "resource-limited but highly creative" use of simple tactics/tools, penchant for hitting unpatched #Zimbra installations, and dedication to crafting unique payloads for various targets. 👀
https://www.databreachtoday.com/phishing-campaign-tied-to-russia-aligned-cyberespionage-a-21567

Analysis: @proofpoint @SentinelLabs @DomainTools

Phishing Campaign Tied to Russia-Aligned Cyberespionage

A hacking group with apparent ties to Russia or Belarus has been using "simple yet effective attack techniques and tools" to gain access to multiple