Bitdefender GravityZone PHASR (Proactive Hardening & Attack Surface Reduction)
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Information
**What it is:**
It’s a proactive endpoint-security module from Bitdefender that focuses on dynamically reducing an organisation’s attack surface by analysing user-endpoint behaviour, restricting risky but legitimate tools (LOTL/LOLBins) and adapting policies automatically.
**Key capabilities:**
* Builds individual profiles of each user/endpoint combination and identifies unused or risky applications/binaries that elevate exposure. ([bitdefender.com][2])
* Dynamically restricts behaviours rather than simply blocking entire applications: for example, allow a tool such as PowerShell but block scripting/encryption commands.
* Integrates with existing endpoint protection/detection stacks (EPP/EDR/XDR), either as an add-on to the GravityZone platform or standalone.
* Claims: up to ~95% reduction in attack surface by restricting unused tools, with minimal user disruption.
**Benefits:**
* Helps organisations shift from purely reactive detection to **preventive hardening** of endpoints.
* Reduces alert fatigue and administrative burden by automating policy adaptation and focusing on risky behaviours rather than all behaviours.
* Doesn’t require replacing existing security stack—it can layer on top of what you already have.
**Usage scenario:**
Ideal for environments where attackers may exploit legitimate tools (so called “living-off-the-land” attacks) and where an organisation wants to minimise exposure without blocking productivity or deploying heavy new infrastructure.
