UNC4221 – CyberSecurityBoard

Attack Groups

Ukraine and FBI Uncover Russian Intelligence Campaign Using Fake Support Texts to Steal Messaging Credentials

The Security Service of Ukraine (SSU), in coordination with the U.S. Federal Bureau of Investigation (FBI), has uncovered a long-running cyber espionage…

CERT-UA Computer Emergency Response Team of Ukraine credential theft CVE-2026-20245

June 27, 2026

Attack Groups

FBI Warns Russian Intelligence Hackers Target Signal Backup Recovery Keys

The FBI and CISA have updated their March warning about Russian intelligence phishing Signal accounts, adding a new tactic where attackers coax…

account takeover Backup Recovery Key CISA CVE-2026-20245

June 26, 2026

Attack Groups

UNC4221 (UAC-0185): Russian Threat Actor in Messaging Phishing

UNC4221, also known as UAC-0185, is a Russian threat actor conducting phishing attacks on messaging applications to steal user credentials and sensitive…

messaging phishing Russian UAC-0185

June 26, 2026