Caen a profité des suites d’un démonstrateur de l'EDR d'HarfangLab en attente de contractualisation pour détecter les prémices du possible déploiement d’un rançongiciel. L’intrusion est avérée, un nettoyage en cours, mais le chiffrement a été évité. Et très probablement le vol de données aussi.
See how this tool—created by a sophisticated and seemingly unknown threat actor—uses the unique approach of disguising itself as part of a Windows update.
Hi, this is a long-time-pending article. We could have published this article earlier (the original bug was reported to MSRC in June 2021 with a 90-days Public Disclosure Policy). However, during communications with MSRC, they explained that since this is an architectural design issue, lots of code changes and testings are expected and required, so they hope to resolve this problem with a one-time CU (Cumulative Update) instead of the regular Patch Tuesday. We understand their situation and agree to extend the deadline.
