TLP TLP TLP CLEAR Author David Deflache, Sebastien Tricaud Summary In early November 2022, a targeted intrusion began via email, delivering an HTML file utilizing HTML smuggling. Previously relying on Excel macros, the threat actor adapted to Microsoft’s macro control updates. Upon opening the HTML, a disguised Adobe page prompted a ZIP download with a…
TLP TLP TLP CLEAR Author David Deflache, Sebastien Tricaud Summary In 2022, a targeted cyberattack employing the WebDav-O malware was identified against a Russian government agency. This malicious activity, linked to the CoughingDown group, spanned back to 2018 and targeted government entities in Belarus. The campaign involved the discovery of multiple WebDav-O variants, with observed…
TLP TLP TLP CLEAR Author Jordi M. Lobo, David Deflache, Sebastien Tricaud Summary Nokoyawa is a cyber intrusion that began with a malicious Excel document in October 2022. The document triggered macros, leading to the execution of an IcedID DLL payload. The attackers established persistence on the host, deployed Cobalt Strike beacons, escalated privileges, and…
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