The Perimeter Is Just the Beginning — How Play Ransomware Moves Inside the Cloud

A joint cybersecurity advisory from CISA, FBI, and the Australian Cyber Security Centre (ACSC) warns that the Play ransomware group is accelerating attacks across the globe—leveraging exposed RDP servers, unpatched software, and architectural blind spots in hybrid and multicloud environments. Once inside, the attackers quietly exfiltrate sensitive data for double extortion and move laterally through unmonitored cloud paths.

This attack pattern isn’t new—but it’s evolving faster than most defenses.

What You'll Learn:

• How Play ransomware executes cyberattacks

• The security gaps the group expoits

• How Aviatrix blocks lateral ransomware movement and implements zero trust principles

Lateral Movement in the Age of Ransomware

The Play ransomware group is known for moving rapidly from initial access to high-value systems. According to CISA’s advisory, their tactics include:

• Exploiting public-facing services like RDP, SonicWall, and Exchange

• Deploying remote access tools such as AnyDesk for persistent access

• Using credential theft tools (e.g., Mimikatz, Cobalt Strike) for privilege escalation

• Exfiltrating data before launching encryption payloads

• Moving laterally across cloud and on-prem infrastructure

These aren’t zero-day exploits—they’re exploiting predictable misconfigurations and oversights, particularly in areas where security architecture breaks down:

• Uninspected east-west traffic

• Overly permissive outbound access

• Lack of zero trust controls between workloads

The Security Gap Nobody Sees Until It’s Too Late

Let’s be clear: protecting the perimeter isn’t enough.

Ransomware like Play spreads through internal infrastructure because:

• East-west traffic is rarely encrypted or inspected

• Cloud segmentation typically ends at the VPC or subnet level

• Outbound (egress) policies are overly permissive or poorly logged

• NGFWs only inspect ingress/egress chokepoints and miss internal traffic

These risks multiply in hybrid and multicloud environments, where traffic crosses providers, regions, and data centers. Without unified visibility and enforcement, attackers operate in the blind spots.

How Aviatrix Blocks Ransomware Lateral Movement — From Edge to Cloud Core

Aviatrix brings zero trust security inside your multicloud infrastructure, where threats like Play actually move. Here’s how we help stop ransomware in its tracks.

Aviatrix High-Performance Encryption (HPE)

• Encrypts east-west and hybrid traffic at up to 100 Gbps

• Protects data in motion across clouds, colos, and data centers

• Eliminates plaintext risk during lateral movement and data exfiltration

Cloud Native Visibility

• Provides full flow logs and anomaly detection across cloud accounts

• Flags unauthorized east-west connections and shadow egress paths

• Integrates into existing observability tools for faster response

Identity-Aware Segmentation

• Enforces least-privilege communication using tags, namespaces, and identity—not just IPs

• Adapts policies dynamically as workloads scale and shift

• Blocks unauthorized traffic between applications, services, or tenants

Secure Egress Controls

• Applies DNS, FQDN, and geo-filtering without relying on native NAT gateways

• Prevents command-and-control callbacks and unauthorized exfiltration

• Centrally manages policies across cloud and on-prem environments

. . . all without deploying agents or rewriting routes.

Compliance Triggers for Action

This advisory is a wake-up call for regulated industries. The architectural weaknesses exploited by Play directly impact your ability to meet compliance mandates:

• HIPAA §164.312(e)(1) — Requires encryption of data in transit

• PCI DSS 4.0 — Req. 3.6.6 & 4.2.1 - Mandates strong encryption, segmentation, and control of data flows

• CISA ZTMM v2.0 — Emphasizes workload-level controls, visibility, and segmentation—not just perimeter IAM

Aviatrix embeds encryption, segmentation, and threat visibility directly into the network layer, helping you align with zero trust and meet compliance inside the cloud fabric.

Final Word: Ransomware Doesn’t Stop at the Perimeter—Neither Should You

Play ransomware proves one thing clearly: attackers follow the path of least resistance.

Once inside your perimeter, they exploit east-west blind spots, move between clouds, and extract sensitive data before you can react. If you can’t see internal traffic, you can’t secure it. If you’re not encrypting east-west, your data is exposed. And if your zero trust strategy ends at login, your apps are still at risk.

Aviatrix embeds zero trust where it matters most: in the connective tissue of your cloud infrastructure.

Learn more about how you can use zero trust principles to protect your cloud infrastructure:

• Discover how you can bring zero trust into your network.

• Request a free security assessment of your network.