Megabeets
Joined 8 years ago
Joined 8 years ago
APT31 - a name given to an attack group that is attributed to China.
Equation Group - a name given to an APT group which is believed to be the Tailored Access Operations (TAO) unit of the NSA. The unit is now named "Computer Network Operations" (CNO).
Jian - a name that was given to a 0-Day exploit that was attributed to the Chinese-affiliated attack group.
0-Day - a vulnerability that is unknown to the public or to the relevant vendor (e.g Microsoft).
0-Day Exploit - an exploit that is directed at a zero-day
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In this story, we claim that the Chinese APT acquired the Equation Group exploit somewhere around 2014, cloned it into their own version (Jian), and used it until was finally caught in 2017.
Interestingly, the 0-Day was reported to Microsoft by Lockheed Martin's Incident Response team. This might suggest that the Chinese APT might have used it to attack American targets.
I tried to summarize the highlights in a less technical lingo in a Twitter thread: https://twitter.com/megabeets_/status/1363807746815066113
This isn't an isolated incident. LANDFALL is part of a larger DNG exploitation wave. Within months, attackers weaponized image parsing vulnerabilities across Samsung (CVE-2025-21042, CVE-2025-21043) and Apple (CVE-2025-43300 chained with WhatsApp CVE-2025-55177 for delivery)
It seems like DNG image processing libraries became a new attack vector of choice – suspiciously consistent across campaigns. Samsung had two zero-days in the same library, while a parallel campaign hit iOS - all exploiting the same file format. Should we expect more?