Microsoft’s Detection and Response and 365 Defender teams are sounding the alarm that the number of observed attacks using web shell malware have nearly doubled since last year. (Microsoft)

The presence of web shells around a network are often one of the strongest signals of an ongoing or imminent cyber attack.

Pulling data from billions of emails, applications, endpoints and identities, Microsoft’s Detection and Response and 365 Defender teams are sounding the alarm that the number of observed attacks using web shell malware have nearly doubled since last year.

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