Day after day, threat actors create new malware to use in cyberattacks. Each of these new implants is developed in its own way, and as a result gets its own destiny – while the use of some malware families is reported for decades, information about others disappears after days, months or several years.
Kaspersky researchers observed the latter situation with an implant that we dubbed MysterySnail RAT. The researchers discovered it back in 2021, when they were investigating the CVE-2021-40449 zero-day vulnerability. At that time, Kaspersky identified this backdoor as related to the IronHusky APT, a Chinese-speaking threat actor operating since at least 2017. Since they published a blogpost on this implant, there have been no public reports about it, and its whereabouts have remained unknown.
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Source: kaspersky
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