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December 1, 2021

Darktrace AI Detects Egregor Ransomware On Day One

Discover how Darktrace AI detected the signs of an Egregor ransomware attack on day one of deployment. Stay informed on the latest cybersecurity threats!
Inside the SOC
Darktrace cyber analysts are world-class experts in threat intelligence, threat hunting and incident response, and provide 24/7 SOC support to thousands of Darktrace customers around the globe. Inside the SOC is exclusively authored by these experts, providing analysis of cyber incidents and threat trends, based on real-world experience in the field.
Written by
Max Heinemeyer
Global Field CISO
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01
Dec 2021

It’s no secret that ransomware has shaped conversations in the SOC this year more than any other topic, as attackers use new malware variants and other sophisticated techniques, tools and procedures to bypass conventional security tools. Not only are these attacks becoming more advanced and difficult to stop, but the ransom demands are growing, with one source suggesting the average ransom demand has grown by over 500% since last year.

To stop novel ransomware attacks, security teams need to turn away from ‘rear-view mirror’ tools trained on previous attacks, and towards AI technology that learns the business from the ground up and autonomously responds with targeted action to contain the threat.

This blog showcases how defenders can fight back against even the most sophisticated attacks, dissecting a recent ransomware attack uncovered by Darktrace’s AI from its first day of deployment at a utility services company. This was a particularly devastating ransomware strain known as Egregor, which has likely been disrupted by a joint effort between law enforcement agencies in Ukraine, France and the US, but wreaked havoc in the winter of 2020/21, affecting 150 companies and demanding ransoms of up to $4 million.

Anatomy of an Egregor attack

Figure 1: A timeline of the attack.

The initial intrusion occurred prior to Darktrace’s deployment, via Emotet, a trojan malware typically spread via spam emails – that has also been disrupted since this attack happened. Had Darktrace / EMAIL been installed, Darktrace’s AI would have picked up on subtle deviations within malicious emails and actioned a response, containing the ransomware attack in its earliest stages. In this case, Antigena Email was not installed, and so the attack was allowed to proceed.

On November 27, 2020, Darktrace’s AI was deployed and began learning the ‘patterns of life’ for every user and device in the organization. On the first day of learning the organization, the technology detected suspicious external connections on a laptop that was deviating from the ‘pattern of life’ of its peer group of similar devices, beaconing to unusual rare domains that were later associated with malware activity.

Lateral movement and privilege escalation indicators were then observed, as well as possible attempted email hijacking. Darktrace’s AI detected new and unusual svcctl requests, new remote procedure calls, and suspicious executable file writes over SMBv2, as well as new external connections over email-related ports.

Connecting the dots: Cyber AI Analyst investigates

Triggered by this unusual activity, Darktrace’s Cyber AI Analyst launched an investigation into all observable stages of the kill chain including command and control connections, suspicious executable SMB writes and privilege escalation.

It then automatically generated an incident summary showcasing every stage of the attack, surfacing all the information the security team needed for a fast response.

Figure 2: Cyber AI Analyst triaged and reported on the malicious activity from the device, surfacing useful metrics and natural language summaries for each stage of the kill chain.

Figure 3: This graph from the Darktrace UI displays how Cyber AI Analyst detected the various stages of the kill chain and correlated the timeline of events.

Figure 4: Darktrace reveals the spike in external connections in blue for the device and the DCE-RPC requests in green. The dots represent model breaches triggered by the unusual suspicious activity originating from the device. The external connection spikes match the internal DC-RPC request spikes indicating the device is attempting to move laterally during the C2 connections.

In this case, real-time detections from Darktrace’s AI coupled with a high-confidence alert from Darktrace’s SOC team enabled the company’s security team to isolate the device from the network, successfully containing the attack before encryption began.

While having AI-powered detection was enough to stop the attack in this scenario, relying on detection alone is playing with fire. With the average dwell time of attacks shrinking – particularly in the case of ransomware – Autonomous Response is becoming critical in taking action on behalf of human teams. Attackers are increasingly striking out of hours, when these teams aren’t available to respond, and performing exfiltration and encryption rapidly. In these cases, detection without immediate response is futile.

Autonomous Response: Revolutionizing ransomware defense

Recent galvanizing attacks have propelled us into a new era of ransomware. 65% of C-suite and other executives say that ransomware will be a major issue they face over the next twelve months.

An over-reliance on security defenses that depend on rules, signatures, and historical data has proven to leave organizations vulnerable to novel ransomware. Failure to prepare for the unknown often forces businesses into a difficult dilemma when it comes to ransomware: either pull the plug to stop the encryption by taking everything offline, or face encrypted systems, and be confronted with a hefty ransom.

But there is a third way, one which uses Self-Learning AI to understand your organization from the ground up to spot subtle deviations indicative of a cyber-threat, regardless of whether it has been seen before. Moreover, Autonomous Response ensures that fast, precise action will be taken against attacks whenever they occur. While even the most attentive human teams cannot hope to match the machine speed of modern ransomware attacks, Autonomous Response halts these sophisticated threats the moment they emerge. It really is the only way to truly level the playing field against today’s ransomware attacks.

Thanks to Darktrace analyst Dylan Evans for his insights on the above threat find.

Darktrace model breaches:

  • Anomalous Connection / Anomalous SSL without SNI to New External
  • Anomalous Connection / Posting HTTP to IP Without Hostname
  • Experimental / Possible Emotet Callback URL
  • Device / Large Number of Model Breaches
  • Device / Lateral Movement and C2 Activity
  • Compromise / SSL or HTTP Beacon
  • Device / Multiple Lateral Movement Model Breaches
  • Compromise / Suspicious SSL Activity
  • Compromise / Unusual SMB Session and DRS
  • Compromise / Suspicious Spam Activity
  • Compromise / Unusual DRS Activity
  • Anomalous Connection / High Volume of New or Uncommon Service Control
  • Compromise / Beaconing Activity To External Rare
  • Compliance / SMB Drive Write
  • Experimental / Anomalous GetNCChanges and Kerberos Ticket
  • Experimental / New or Uncommon SMB Named Pipe V4
  • Device / Large Number of Connections to New Endpoints
  • Anomalous Connection / New or Uncommon Service Control
  • User / New Admin Credentials on Client
  • Anomalous Connection / Possible Outbound Spam
  • Compromise / New or Repeated to Unusual SSL Port
  • Compromise / Slow Beaconing Activity To External Rare
  • Anomalous Connection / Anomalous SSL without SNI to New External
  • Experimental / New or Uncommon SMB Named Pipe V3
  • Experimental / Anomalous DRSGetNCChanges Operation
  • Anomalous Connection / Possible Callback URL
  • Compromise / Sustained SSL or HTTP Increase
  • Anomalous Connection / Multiple SMB Admin Session
  • Anomalous Connection / Rare External SSL Self-Signed
  • Anomalous Connection / Posting HTTP to IP Without Hostname
  • Device / New Failed External Connections
  • Anomalous Connection / Suspicious Self-Signed SSL
  • Compromise / SSL Beaconing to Rare Destination
  • Compromise / HTTP Beaconing to Rare Destination
  • Experimental / Rare Device TLS Agent

Inside the SOC
Darktrace cyber analysts are world-class experts in threat intelligence, threat hunting and incident response, and provide 24/7 SOC support to thousands of Darktrace customers around the globe. Inside the SOC is exclusively authored by these experts, providing analysis of cyber incidents and threat trends, based on real-world experience in the field.
Written by
Max Heinemeyer
Global Field CISO

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May 21, 2026

Prompt Security in Enterprise AI: Strengths, Weaknesses, and Common Approaches

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How enterprise AI Agents are changing the risk landscape  

Generative AI Agents are changing the way work gets done inside enterprises, and subsequently how security risks may emerge. Organizations have quickly realized that providing these agents with wider access to tooling, internal information, and granting permissions for the agent to perform autonomous actions can greatly increase the efficiency of employee workflows.

Early deployments of Generative AI systems led many organizations to scope individual components as self-contained applications: a chat interface, a model, and a prompt, with guardrails placed at the boundary. Research from Gartner has shown that while the volume and scope of Agentic AI deployments in enterprise environments is rapidly accelerating, many of the mechanisms required to manage risk, trust, and cost are still maturing.

The issue now resides on whether an agent can be influenced, misdirected, or manipulated in ways that leads to unsafe behavior across a broader system.

Why prompt security matters in enterprise AI

Prompt security matters in enterprise AI because prompts are the primary way users and systems interact with Agentic AI models, making them one of the earliest and most visible indicators of how these systems are being used and where risk may emerge.

For security teams, prompt monitoring is a logical starting point for understanding enterprise AI usage, providing insight into what types of questions are being asked and tasks are being given to AI Agents, how these systems are being guided, and whether interactions align with expected behavior. Complete prompt security takes this one step further, filtering out or blocking sensitive or dangerous content to prevent risks like prompt injection and data leakage.

However, visibility only at the prompt layer can create a false sense of security. Prompts show what was asked, but not always why it was asked, or what downstream actions were triggered by the agent across connected systems, data sources, or applications.

What prompt security reveals  

The primary function of prompt security is to minimize risks associated with generative and agentic AI use, but monitoring and analysis of prompts can also grant insight into use cases for particular agents and model. With comprehensive prompt security, security teams should be able to answer the following questions for each prompt:

  • What task was the user attempting to complete?
  • What data was included in the request, and was any of the data high-risk or confidential?
  • Was the interaction high-risk, potentially malicious, or in violation of company policy?
  • Was the prompt anomalous (in comparison to previous prompts sent to the agent / model)?

Improving visibility at this layer is a necessary first step, allowing organizations to establish a baseline for how AI systems are being used and where potential risks may exist.  

Prompt security alone does not provide a complete view of risk. Further data is needed to understand how the prompt is interpreted, how context is applied, what autonomous actions the agent takes (if any), or what downstream systems are affected. Understanding the outcome of a query is just as important for complete prompt security as understanding the input prompt itself – for example, a perfectly normal, low-risk prompt may inadvertently result in an agent taking a high-risk action.

Comprehensive AI security systems like Darktrace / SECURE AI can monitor and analyze both the prompt submitted to a Generative AI system, as well as the responses and chain-of-thought of the system, providing greater insight into the behavior of the system. Darktrace / SECURE AI builds on the core Darktrace methodology, learning the expected behaviors of your organization and identifying deviations from the expected pattern of life.

How organizations address prompt security today

As prompt-level visibility has become a focus, a range of approaches have emerged to make this activity more observable and controllable. Various monitoring and logging tools aim to capture prompt inputs to be analyzed after the fact.  

Input validation and filtering systems attempt to intervene earlier, inspecting prompts before they reach the model. These controls look for known jailbreak patterns, language indicative of adversarial attacks, or ambiguous instructions which could push the system off course.

Importantly, for a prompt security solution to be accurate and effective, prompts must be continually observed and governed, rather than treated as a point-in-time snapshot.  

Where prompt security breaks down in real environments

In more complex environments, especially those involving multiple agents or extensive tool use, AI security becomes harder to define and control.

Agent-to-Agent communications can be harder to monitor and trace as these happen without direct user interaction. Communication between agents can create routes for potential context leakage between agents, unintentional privilege escalation, or even data leakage from a higher privileged agent to a lower privileged one.

Risk is shaped not just by what is asked, but by the conditions in which that prompt operates and the actions an agent takes. Controls at the orchestration layer are starting to reflect this reality. Techniques such as context isolation, scoped memory, and role-based boundaries aim to limit how far a prompt’s influence can extend.  

Furthermore, Shadow AI usage can be difficult to monitor. AI systems that are deployed outside of formal governance structures and Generative AI systems hosted on unknown endpoints can fly under the radar and can go unseen by monitoring tools, leaving a critical opening where adversarial prompts may go undetected. Darktrace / SECURE AI features comprehensive detection of Shadow AI usage, helping organizations identify potential risk areas.

How prompt security fits in a broader AI risk model

Prompt security is an important starting point, but it is not a complete security strategy. As AI systems become more integrated into enterprise environments, the risks extend to what resources the system can access, how it interprets context, and what actions it is allowed to take across connected tools and workflows.

This creates a gap between visibility and control. Prompt security alone allows security teams to observe prompt activity but falls short of creating a clear understanding of how that activity translates into real-world impact across the organization.

Closing that gap requires a broader approach, one that connects signals across human and AI agent identities, SaaS, cloud, and endpoint environments. It means understanding not just how an AI system is being used, but how that usage interacts with the rest of the digital estate.

Prompt security, in that sense, is less of a standalone solution and more of an entry point into a larger problem: securing AI across the enterprise as a whole.

Explore how Darktrace / SECURE AI brings prompt security to enterprises

Darktrace brings more than a decade of AI expertise, built on an enterprise‑wide platform designed to operate in and understand the behaviors of the complex, ambiguous environments where today’s AI now lives. With Darktrace / SECURE AI, enterprises can safely adopt, manage, monitor, and build AI within their business.  

Learn about Darktrace / SECURE AI here.

Sign up today to stay informed about innovations across securing AI.

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About the author
Jamie Bali
Technical Author (AI) Developer

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May 21, 2026

Data Center Security: Improving Visibility and Threat Detection Across IT, OT, and IoT

data center scurityDefault blog imageDefault blog image

What is data center cybersecurity?

Much of the conversation surrounding the data center boom has focused on power generation, cooling efficiency and water resources, construction, and compute capacity. In addition, cybersecurity has quietly become one of the most critical operational concerns as modern data centers are becoming some of the most operationally complex networked environments.

The more connected data center environments become, the larger and more dynamic their attack surface grows. What makes data center security particularly challenging is that they no longer resemble traditional enterprise IT environments alone. Instead, they operate like critical infrastructure facilities

Challenges of securing data centers

What makes these environments complicated is that the technologies responsible for keeping them operational: power distribution, cooling systems, airflow management, environmental controls, surveillance, and physical access management, all rely heavily on Operational Technology (OT), Industrial IoT (IIoT), and IoT systems alongside traditional IT infrastructure.

Programmable logic controllers (PLCs), building management systems (BMS), energy management systems (EMS), surveillance cameras, access control platforms, virtualization infrastructure, engineering workstations, contractor laptops, and cloud-connected orchestration systems now coexist within the same environment. Many are connected through routable networks, managed remotely, and accessed by 3rd party OEMs or System Integrators.

Why modern data center infrastructure faces increasing cyber risk

The challenge is not simply that there are more devices. It is that these IT, OT and IOT systems and devices are now deeply interconnected in ways that blur the boundaries between operational and enterprise infrastructure.

OT systems responsible for cooling and power distribution communicate alongside enterprise IT infrastructure. IoT devices used for physical security sit adjacent to cloud-connected management platforms. Third-party vendors and contractors frequently require remote access to maintain operations and optimize performance. AI-driven automation platforms increasingly orchestrate workflows across multiple environments simultaneously.

Every additional connection improves efficiency and scalability, but every additional connection also creates new relationships between systems that adversaries may exploit.

How IT, OT, and IoT convergence expands the data center attack surface

Historically in critical infrastructure environments enterprise IT, and OT or industrial control systems ICS, have been often separated by a DMZ.

That separation has steadily disappeared in pursuit of efficiency and access to valuable data that lives within the OT networks such as how many widgets were produced today. This conceptually is commonly referred to as “IT OT convergence.”

Modern data centers increasingly depend on interconnected systems operating across multiple domains simultaneously and face a similar reality when it comes to IT OT convergence.  

This convergence creates efficiency and visibility benefits, but it also introduces structural security challenges that traditional approaches struggle to address.

Many of the OT systems were never originally designed with modern cybersecurity requirements in mind. OT devices often prioritize uptime and operational continuity over security controls. IoT and OT devices may have limited security hardening, are inconsistently patched, or insecure default configurations. Third-party connectivity introduces external dependencies that organizations do not fully control.

As environments converge the attack surface changes and grows, attackers may exploit weaker systems positioned adjacent to critical operations for initial access. For example, a compromised IoT device may provide access into broader infrastructure, or an exposed remote management interface may enable lateral movement into OT systems.  

For defenders, rather than forcing segmentation where it’s not possible, focus oversight and monitoring across interconnected systems and how this activity might create operational risk, gaining visibility across these systems will ensure better awareness of and protection across the cracks in your systems attackers look to exploit.

Why traditional data center security tools create visibility gaps

Many organizations still secure IT, OT, and IoT environments through separate tools, teams, and workflows. Historically, this made sense. The environments themselves were more isolated, and the operational priorities were different.

But convergence changes the nature of detection and response.

Modern attacks increasingly move across domains as lateral movement and discovery techniques are pervasive amongst all the most well-known attacks to have disrupted OT. Adversaries may gain access through phishing or credential compromise, establish persistence in IT systems, pivot into operational infrastructure, exploit unmanaged IoT devices, and move laterally across cloud-connected environments.

Viewed independently, many of these signals may appear low priority or disconnected.

An anomalous login attempt, unusual device communication, changes in network traffic patterns, or abnormal behavior from an industrial controller may not appear significant on their own. The problem emerges when these activities are part of a broader attack chain unfolding across multiple systems simultaneously.

Siloed security models struggle to correlate this activity effectively because they lack shared operational context. Security teams may see isolated indicators while missing the relationships between them.

This creates a fundamental visibility problem that has discursive effects across security teams, leading to analyst overload, tedious alert investigations, and slower response times.

The issue is not simply detecting threats faster. It is understanding how activity across IT, OT, IoT, cloud, and remote access systems relate to one another in real time before operational disruption occurs.

Security measures to safeguard modern data center infrastructure

Rule-based systems, predefined indicators, and signature-driven approaches remain useful for identifying known threats, but they are less effective at identifying subtle behavioral deviations, novel attack paths, insider activity, 3rd party supply chain exploitation or attacks that move across operational domains.  

Darktrace’s Self-Learning AI approach is designed to operate across converged IT, OT, IoT, and cloud environments. Using multiple layers of AI models, Darktrace solutions come together to achieve behavioral prediction, real-time threat detection and response, and incident investigation, all while empowering your security team with visibility and control.

Because the models are environment-specific, they can adapt across highly diverse infrastructure including operational technology, physical security systems, enterprise IT, cloud workloads, and third-party connectivity.

This enables organizations to build a more unified understanding of activity across the data center.

Unified visibility across interconnected environments

Darktrace provides visibility across IT, OT, IoT, and cloud systems through a centralized platform. Security teams and data center operators can maintain live asset inventories, monitor data flows, identify vulnerable or end-of-life systems, and better understand how interconnected infrastructure communicates across the environment.

This becomes increasingly important in environments where unmanaged devices, transient contractor systems, and third-party connectivity continuously alter operational conditions.

Threat detection, investigation, and response

Darktrace applies multiple AI models to identify anomalous activity that may indicate known threats, novel attacks, insider activity, or cross-domain compromise.

By understanding how devices and systems normally behave within the environment, Darktrace can identify subtle deviations that may otherwise remain undetected in siloed environments.

Its autonomous response capabilities can also help contain threats during their early stages before they escalate into operational disruption. Meanwhile, Cyber AI Analyst provides explainable AI-driven investigations that help security teams understand the relationships between events, systems, and users involved in potential incidents.

Proactive risk identification

As data center environments continue to evolve, organizations increasingly need to understand not only active threats, but also where structural weaknesses may exist across interconnected systems.

Through capabilities such as attack path modeling and behavioral risk analysis, Darktrace helps organizations prioritize remediation efforts and identify areas where operational exposure may increase over time.

This supports a more proactive security posture in environments where operational continuity is critical.

Securing the future of interconnected infrastructure

As data centers continue to scale in size, complexity, and operational importance, their reliance on interconnected IT, OT, IoT, cloud, and AI-driven systems will only deepen.

The challenge organizations face is no longer simply protecting individual devices or isolated environments. It is understanding how risk emerges across interconnected systems operating together and detecting threats to these systems in real time.

This is ultimately what makes modern data center security different from traditional enterprise security models. The operational dependencies are broader, the environments are more heterogeneous, and the consequences of disruption and intent of adversaries are more like those in the critical infrastructure space.

Securing these environments therefore requires more than fragmented visibility across disconnected tools. Organizations increasingly need unified approaches capable of understanding relationships across systems, detecting threats early, and responding before operational disruption spreads across critical infrastructure.

As the infrastructure powering the digital economy continues to evolve, cybersecurity resilience will become increasingly inseparable from operational resilience itself.

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About the author
Daniel Simonds
Director of Operational Technology
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