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New version of MysterySnail RAT and lightweight MysteryMonoSnail backdoor

Kaspersky Securelistby @Securelist ()6 min read3 · 1 read
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Vulnerabilities mentioned

All
CVEVulnerabilityCVSSEPSSSignalsPublished
CVE-2021-40449
Use-After-Free Local Privilege Escalation in Microsoft Windows Win32k
7.882%KEVRansomwarePoC
KEV

Indicators of compromise

auto-extracted · verify before use · export allAll
TypeIndicatorContext
domainleotolstoys.comng performed with the following servers: watch-smcsvc[.]com leotolstoys[.]com Having analyzed the set of commands implemented in the la
domainwatch-smcsvc.comcommunications being performed with the following servers: watch-smcsvc[.]com leotolstoys[.]com Having analyzed the set of commands imp

From the original article

6 min read at securelist.com

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. We observed the latter situation with an implant that we dubbed MysterySnail RAT.

Kaspersky Securelist

By @Securelist · securelist.com

Read the full article at Kaspersky Securelist

A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.