Cyberattacks on critical infrastructure are no longer sophisticated-only operations. Increasingly, attackers are exploiting basic security misconfigurations—what experts call “low-hanging fruit.”
Recent incidents involving gas stations across the United States highlight a growing concern: poorly secured operational technology (OT) systems exposed online. Iranian-linked hackers reportedly targeted automatic tank gauge (ATG) systems—devices used to monitor fuel storage—raising alarms across the cybersecurity community.
While these attacks didn’t cause direct physical damage, the implications are serious. When attackers manipulate what operators see, they can influence decisions that may lead to safety failures, compliance violations, and operational disruption.
In this article, you’ll learn:
- What happened and why it matters
- How ATG and industrial systems are attacked
- Key OT cybersecurity risks
- Real-world attack scenarios
- Best practices to secure critical infrastructure
What Are Automatic Tank Gauge (ATG) Systems?
Automatic Tank Gauge (ATG) systems are industrial monitoring devices used to track:
- Fuel levels
- Leak detection
- Tank pressure and temperature
- Inventory management
These systems are a core component of gas station operations and critical infrastructure monitoring.
The Core Issue
Many ATG systems were:
- Exposed directly on the internet
- Operating without authentication
- Using default or no passwords
This created an environment where attackers could access monitoring dashboards without resistance.
Understanding the Attack: What Actually Happened?
Iran-linked attackers reportedly:
- Scanned the internet for exposed ATG systems
- Accessed unsecured monitoring dashboards
- Manipulated display data seen by operators
Important Clarification
- No physical fuel manipulation occurred
- No direct infrastructure damage was reported
However, the real danger lies in data manipulation, not physical control.
Why This Attack Is a Big Deal
1. False Data = Dangerous Decisions
If operators see incorrect readings:
- Fuel leaks may go unnoticed
- Tanks may overfill
- Equipment failures may be ignored
This can lead to environmental hazards, financial loss, or even explosions.
2. Operational Technology (OT) Is Not Designed for Internet Exposure
Many industrial systems were originally built for:
- Isolated environments
- Internal network access only
The shift to remote monitoring exposed them without proper security controls.
3. “Default Password” Problem Still Exists
A major vulnerability highlighted:
- Use of default credentials
- Systems with no authentication at all
This is one of the most basic yet widespread cybersecurity failures.
4. Attackers Are Exploiting Easy Targets First
Experts describe this strategy as targeting “low-hanging fruit”:
- Internet-exposed systems
- Weak or missing authentication
- Legacy infrastructure
These attacks do not require advanced skills—just scanning tools and persistence.
How These Attacks Work
Step-by-Step Attack Flow
- Internet Scanning
- Attackers scan for exposed OT devices
- Identify ATG systems with open access
- Access Without Authentication
- Login bypass (no password required)
- Use of default credentials
- Interface Manipulation
- Modify data displayed to operators
- Change readings without altering actual systems
- Operational Impact
- Misleading operators
- Causing incorrect decisions
Real-World Risk Scenarios
Scenario 1: Undetected Fuel Leak
- ATG system shows “normal levels”
- Actual leak continues unnoticed
Impact: Environmental damage and regulatory penalties
Scenario 2: Overfill Event
- Tank appears partially full
- Operators continue filling
Impact: Spillage, fire hazard, operational shutdown
Scenario 3: Delayed Equipment Failure Detection
- Faulty system hides malfunction
- Maintenance is skipped
Impact: Costly breakdown or safety incident
Why This Problem Has Persisted for Years
1. Legacy Infrastructure
Many OT systems were built:
- Before modern cybersecurity threats
- Without encryption or authentication
2. Poor Security Awareness in OT Environments
Unlike IT environments:
- Security practices are not always enforced
- Systems are prioritized for uptime over security
3. Lack of Network Segmentation
Exposed systems should be:
- Behind firewalls
- Accessible only via secure networks
Instead, many are directly connected to the internet.
4. Slow Adoption of Security Standards
Despite repeated warnings from authorities:
- Vulnerable systems remain online
- Patching and upgrades are delayed
Common Mistakes in OT Security
- Using default passwords
- Exposing systems directly to the internet
- No monitoring or logging
- Lack of segmentation between IT and OT
- Ignoring firmware/software updates
Best Practices to Secure OT and Critical Infrastructure
1. Remove Internet Exposure
- Never expose industrial systems publicly
- Use private networks or secure gateways
2. Enforce Strong Authentication
- Replace default passwords immediately
- Use multi-factor authentication (MFA)
3. Implement Network Segmentation
- Separate OT from IT networks
- Restrict access to authorized systems only
4. Use Secure Remote Access
- Deploy VPNs for remote connectivity
- Avoid direct web interfaces
5. Continuous Monitoring and Threat Detection
- Track unusual access patterns
- Monitor login attempts and system changes
6. Patch and Update Regularly
- Upgrade outdated systems
- Apply security patches promptly
7. Conduct Risk Assessments
- Identify exposed devices
- Evaluate vulnerabilities regularly
Role of Cybersecurity Frameworks
Organizations should align with:
- NIST Cybersecurity Framework (risk management and controls)
- Zero Trust Architecture (no implicit trust)
- Industrial Control System (ICS) security standards
These frameworks help reduce exposure and improve resilience.
Broader Trend: Critical Infrastructure Under Attack
This incident reflects a wider pattern:
- Increasing attacks on industrial systems
- Growing focus on operational disruption
- Rise in opportunistic cyber campaigns
Reports show that most critical infrastructure organizations have experienced a cyber incident in the past year, highlighting systemic weaknesses.
FAQs
1. What was the main vulnerability in the gas station attacks?
Internet-exposed ATG systems with no or weak authentication.
2. Did hackers control fuel levels?
No, but they manipulated the data displayed to operators.
3. Why didn’t security measures stop this?
Because many systems lacked basic controls like passwords.
4. What is the biggest risk of such attacks?
Misleading operators, leading to dangerous real-world decisions.
5. Are these attacks sophisticated?
No, they rely on basic techniques like scanning and default credentials.
6. How can organizations prevent this?
By securing systems, removing public exposure, and enforcing strong authentication.
Conclusion
The gas station incident is a clear reminder:
Cybersecurity failures don’t always come from complex attacks—they often come from simple oversights.
Leaving critical systems exposed to the internet is equivalent to leaving your infrastructure wide open to attackers.
Key takeaway:
- Reduce exposure
- Strengthen authentication
- Monitor continuously
Securing operational technology is no longer optional—it’s essential for safety, compliance, and business continuity.
