Bitdefender GravityZone Proactive Hardening and Attack Surface Reduction (PHASR)

Excess software access creates unnecessary risk. Uncover unused risky binaries and applications, restrict access to them, and cut your attack surface by up to 95%.

Overview

Capabilities and Benefits
Industry Recognition
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92.8%

Attack reduction achieved by blocking tools unused by the management team.

95.1%

Attack reduction achieved by allowing tools such as PowerShell to only take legitimate actions.

99%

Of companies don’t use Bitsadmin, but have it enabled.

133

LOLBins in a fresh Windows 11 installation.

Shrink Your Employee Attack Surface by Up To 95%

Excess access to unnecessary tools expands your attack surface. PHASR identifies these risks per user and restricts unused applications and atypical but high-risk actions, shrinking the attack surface by up to 95%.

Stop Stealthy Attacks Using Living off the Land Techniques

70% of cyberattacks now involve Living-off-the-Land (LOTL) techniques that use legitimate tools to evade detection. PHASR blocks excess access to these tools, stopping attacks early and reducing alert fatigue and security costs.

Minimize security overhead

Managing static rules, exceptions and granular policies is impractical. PHASR delivers hardening that adapts autonomously to changing user behavior and threat vectors, freeing your team from administrative overhead.

Each of Your Users Is Unique. Their Security Should be Too.

GravityZone Proactive Hardening and Attack Surface Reduction (PHASR) dynamically tailors hardening without slowing down business or burdening IT.

Tailored Hardening

Conventional system hardening doesn’t go far enough. PHASR uses AI algorithms to build risk profiles for each user-endpoint combination, identifying the risky tools and behaviors that are unnecessary and tailoring hardening to best fit each user’s unique needs.

GravityZone Platform - Attack surface exposure insights reports

Dynamic Attack Surface Reduction

Maintaining static attack surface reduction rules and exceptions is troublesome. PHASR continuously learns, adapting autonomously to changing behaviors and threat vectors and minimizing IT overhead and security gaps.

GravityZone Platform - PHASER rules dashboard

Precise Control

Unlike application control tools, PHASR is not limited to blanket allow/deny decisions. Within a used tool, it can restrict only risky behaviors, atypical for the user, for example allowing PowerShell to run, but blocking encrypted commands.

GravityZone Platform - PHASR - LOLBins analysis dashboard

Application Risk Metrics

PHASR displays attack surface and risk reduction metrics associated with each recommendation and company-level dashboards help security leaders track and demonstrate security posture improvements and justify investments.

Autopilot Protection

PHASR enables Autopilot protection, dynamically applying new hardening recommendations as behaviors and threats change. Admins can also choose Direct Control mode when they want to selectively apply recommendations.

GravityZone Platform - PHASR - Endpoint issues view

Simplified Deployment and Management

PHASR bridges prevention and detection and is seamlessly integrated within the GravityZone Platform. For existing GravityZone customers, it takes just minutes from activation to PHASR identifying unnecessary risks.

"Bitdefender has consistently performed well in independent tests, including MITRE Engenuity and has introduced innovative features such as Deep Process Inspector and Advanced Reasoning. Most recently, in 2024, Bitdefender Proactive Hardening and Attack Surface Reduction (PHASR), a groundbreaking technology that transforms how defense-in-depth-security is applied and managed across businesses."

IDC, IDC ProductScape: Worldwide Small and Medium-Sized Business Endpoint Protection Market.

GravityZone Unified Cybersecurity Platform: Security - Risk - Compliance

Manage Risks Proactively, Achieve Compliance Effortlessly, and Promptly Respond to Threats with a Proven, Unified Platform

The invisible epidemic of Living off the Land attacks is a key challenge for security teams but it is not the only one. Vulnerabilities, attack surfaces and complexity have increased, exploitation is faster, and many teams are short-staffed and struggling with alert fatigue.

Bitdefender’s approach to address these challenges is to continue to innovate and enhance the comprehensive and consistently top-ranked GravityZone platform and services. This drives our vision of enabling all organizations to manage risks proactively, achieve compliance effortlessly and promptly respond to threats.

Bitdefender GravityZone PHASR is available as an additional license to the Bitdefender GravityZone Enterprise package and MDR offerings. It was built from the ground up as part of GravityZone and aligns to our strategy of enabling superior risk reduction and management through 360º Deep Visibility, Pragmatic Risk Prioritization and Automated Resolution.

Security That’s Consistently Recognized Across Independent Evaluations

Most #1 Placements in AV-Comparatives Enterprise Tests

Based on results in Real-world Protection Test, Malware Protection Test, Advanced Threat Protection Test, Endpoint Protection and Response Test
(Jan 2021 – Jan 2025).

Best Protection. Best Performance for Business Users

Bitdefender GravityZone Endpoint Security received the AV-TEST Award 2023 for Best Protection and Best Performance in the business users category.

High Threat Visibility, Minimal Noise

Bitdefender achieved 100% analytical coverage for both Linux and macOS, with zero False Positives (FPs) in both cases.

A Customers' Choice in EMEA

Gartner® Peer Insights™

Datasheet

GravityZone Security PHASR Datasheet

Read the Report Technical Explainer

Living off the Land Attacks

Read the Report

Proactive Hardening and Attack Surface Reduction (PHASR)

What are Living off the Land techniques and how do they bypass detection?

Living off the land techniques involve attackers leveraging legitimate, pre-installed Binaries to blend in with normal activity. As an analogy, imagine an office intruder that instead of carrying suspicious tools such as crowbars, enters with a stolen badge like any other employee and just uses available systems and access to get to their goal. Read more about Living off the Land Attacks.

How does GravityZone PHASR identify unnecessary, risky tools?

GravityZone PHASR uses constantly updated threat intelligence on attack patterns and risky tools and leverages individualized machine learning algorithms to build and constantly update behavior patterns for each user-endpoint combination. This enables PHASR to identify which risky tools and actions are unnecessary and can be restricted for each user, without impacting the business.

What makes GravityZone PHASR unique?

Bitdefender GravityZone PHASR redefines endpoint security and attack surface reduction by precisely and dynamically tailoring security to user needs, unlike conventional security tools that are built to fit all customers and users. While most hardening tools are limited to binary allow/deny decisions, PHASR enables precise action-level restrictions and does not negatively impact usability and manageability.

Proven. Unsurpassed Cybersecurity Effectiveness.

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