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 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…
TLP TLP TLP CLEAR Author Jordi M. Lobo Summary In May 2023, a campaign using the “404 TDS” Traffic Distribution System delivered Truebot via email. Recipients clicking the email link were redirected through multiple URLs, ending in a fake Adobe Acrobat document download that was a Truebot executable. After execution, Truebot copied and renamed, then…
TLP TLP TLP CLEAR Author David Deflache Summary This case involves a sophisticated intrusion that occurred over an 11-day period. The threat actors initiated the attack by sending an email with a link to download a password-protected zip file containing an ISO file. Upon extraction, the ISO file mounted as a CD and executed a…
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