![[Joint Cybersecurity Advisory] Operation Double Barrel (The Relationship Between a State-Sponsored Threat Actor and the Gunra Ransomware Group)](https://asec.ahnlab.com/wp-content/uploads/2026/07/3UldpOr2FtkFXLKiyukxTR2XcxLgvaZoG5QaUPP8.webp)
[Joint Cybersecurity Advisory] Operation Double Barrel (The Relationship Between a State-Sponsored Threat Actor and the Gunra Ransomware Group)
This technical analysis report was prepared as part of the joint cybersecurity advisory titled “Advisory on Cyberattacks Targeting Korean Citizens and Businesses by State-Sponsored Hacking Groups” issued by the Republic of Korea’s National Intelligence Service (NIS), National Police Agency (NPA), Korea Internet & Security Agency (KISA), and Financial Security Institute
March 2026 Security Issues in the Korean & Global Financial Sector
Content. a number of malware samples including phishing, web shell, droppers, backdoor malware, downloaders, Infostealer, and CoinMiner targeting the financial sector have been distributed. we observed a number of cases where Korean disguised attachment names and HTML/JS execution methods were utilized to propagate phishing. account compromise campaigns through the Telegram
