File Compression

The FBI issued alerts regarding cyber campaigns by Russian and Iranian actors targeting messaging platforms. Russian intelligence services are reportedly infiltrating applications like Signal, leading to unauthorized access of thousands of accounts of U.S. government officials, military personnel, political figures, and journalists. Russian operatives are using phishing messages disguised as support notifications to trick users into providing verification codes or account PINs, potentially allowing attackers to take over accounts. Once compromised, attackers can access messages, contact lists, and launch further phishing attempts. The advisory emphasizes that while Signal is targeted, similar tactics can affect any messaging app. In a separate alert, the FBI highlighted Iran’s Ministry of Intelligence and Security (MOIS) using Telegram to distribute malware aimed at Iranian dissidents and journalists, enabling them to steal sensitive information. This malware often disguises itself as legitimate software and connects to Telegram bots for remote access and data exfiltration. The FBI linked these activities to the Handala Hack group, which claimed responsibility for a recent attack on medical device manufacturer Stryker. The malware can be introduced through social media by hackers posing as technical support. Experts note that the use of Telegram for cyber compromises is increasing, as it helps malicious actors avoid detection by blending their traffic with trusted platforms.