Mandiant blames UNC4841 for Barracuda ESG attack

June 16, 2023

According to Mandiant, Chinese spies, UNC4841, are behind a data-stealing effort that targeted Barracuda Email Security Gateway (ESG) devices globally.

The attacks, which started in October 2022, took use of a serious vulnerability (CVE-2023-2868) in Barracuda ESG equipment. UNC4841 primarily targeted a group of Barracuda ESG appliances across multiple countries and sectors, according to Mandiant. UNC4841, according to Mandiant, is an espionage actor working in behalf of the People’s Republic of China.

UNC4841 infiltrated affected ESG devices through a number of methods, including delivering malicious emails with corrupted attachments. When the attackers gained access to a device, they installed three pieces of malware: Saltwater, Seaspy, and Seaside. These malicious applications let the attackers to remain on the device indefinitely, steal data, and send email to other appliances.

UNC4841 especially targeted high-profile academics in Taiwan and Hong Kong, as well as Asian and European government leaders in Southeast Asia, according to Mandiant. These persons’ emails and other sensitive data were stolen by the attackers.

The sources for this piece include an article in TheRegister.

Top Stories

Related Articles

February 5, 2026 A security researcher at Koi named Oren Yomtov has uncovered a widespread malware operation embedded inside an more...

February 4, 2026 More than three million Fortinet devices have been exposed to a critical authentication-bypass vulnerability that is being more...

February 4, 2026 A now-patched security flaw in Docker’s built-in AI assistant exposed users to the risk of remote code more...

January 28, 2026 A suspected credit card skimming attack on the Canada Computers online store may have quietly exposed customer more...

Jim Love

Jim is an author and podcast host with over 40 years in technology.

Share:
Facebook
Twitter
LinkedIn