Threats Tagged 'kimsuky'

In May 2026, security researchers observed an attack campaign distributing KimJongRAT through GitHub and other legitimate services. KimJongRAT, used by the North Korean APT group Kimsuky since 2013, combines information stealing and remote access capabilities. The infection chain begins with phishing emails containing shortened URLs redirecting to GitHub Releases hosting malicious ZIP files. Victims execute LNK files that download HTA files from GitHub, which then retrieve subsequent payloads from Google Drive. Recent variants demonstrate significant evolution: they now dynamically fetch C2 addresses from external sources rather than hardcoding them, enabling operators to maintain persistent access despite infrastructure takedowns. Additionally, new versions include MeshAgent RMM installation for redundant access. The campaign exemplifies Living Off Trusted Sites (LOTS) techniques, abusing legitimate platforms like GitHub, Google Drive, and Dropbox to evade detection.

MediumMalwareJapan#kimsuky#lots#infostealer

Through April 2026, Kimsuky deployed sophisticated malicious campaigns against South Korean military and corporate entities using tailored social engineering tactics including fake security software installation pages and spoofed Webex meeting pages leveraging legitimate meeting schedules. The threat actor introduced a novel JSONPing technique allowing distribution pages to verify in real time whether victims executed the payload via JSONP queries to localhost servers. Analysis revealed a new HttpSpy variant with a three-stage execution chain replacing the previous single-binary architecture, utilizing RC4 encryption and shared infrastructure indicators. Attribution was confirmed through code pattern overlaps, reused encryption keys, XAMPP certificate fingerprints, and preferred ASN usage consistent with historical Kimsuky operations targeting South Korea.

MediumMalwareSouth Korea#spear phishing#httpspy#webex spoofing