Why CISOs Are Ditching IOC Fatigue for Campaign Thinking

Jan de Vries · 2026-07-30

If you're a CISO, you know the feeling all too well. Your inbox is a firehose of alerts, each one screaming for attention. Every email looks like a potential breach, every attachment a possible payload. It's exhausting. And honestly, it's not working anymore. The old way of chasing individual indicators of compromise—or IOCs—is burning out your team and leaving gaps in your defense. But there's a better path forward, and it starts with changing how you think about phishing altogether. Instead of treating each suspicious email as a one-off event, imagine viewing them as part of a larger, coordinated campaign. That shift in mindset is exactly what Cofense is championing, and it might just be the antidote to the fatigue that's plaguing security operations centers across the country. ### The Problem with Chasing Single Emails Let's be real: the traditional approach to phishing defense is reactive. You get an alert, you investigate, you block, and then you move on to the next one. It's a whack-a-mole game where the attackers are always one step ahead. Each email is like a single drop of water, but what if you looked at the whole storm instead? When you focus on individual IOCs—like a specific sender address or a malicious link—you're only seeing a tiny slice of the attack. Cybercriminals are savvy. They rotate domains, tweak their payloads, and change their tactics faster than you can update your blocklists. By the time you've neutralized one email, a hundred more variations are already in the wild. This constant chase creates a massive workload for your analysts, leading to alert fatigue, missed detections, and high turnover. ### Seeing the Bigger Picture: Campaign-Based Detection Campaign-based phishing detection flips the script. Instead of asking "Is this email bad?", you start asking "What is this group trying to accomplish?" By grouping related phishing attempts together, you can spot patterns that would be invisible when looking at emails in isolation. It's like seeing the forest instead of just staring at one tree. This approach gives you a strategic advantage. You can identify the infrastructure behind the attacks, understand the lure tactics being used, and predict what might come next. It's not just about blocking a single email anymore; it's about disrupting an entire operation. For CISOs, this means moving from a reactive stance to a proactive one, which is where real security improvements happen. ### How This Reduces Analyst Fatigue Your analysts are your most valuable asset, but they're also your most vulnerable. When they're drowning in a sea of unrelated alerts, their decision-making quality plummets. Campaign-based thinking changes the game by providing context. Instead of investigating 50 random emails, they can investigate one campaign and understand the threat in a fraction of the time. This isn't just about efficiency; it's about effectiveness. When analysts see the bigger picture, they can prioritize what actually matters. They can focus their energy on the campaigns that pose the highest risk to your organization, rather than getting bogged down in low-level noise. The result? A more engaged team, faster response times, and a security posture that actually holds up. > "The goal isn't to catch every single phishing email. The goal is to understand the threat well enough to stop the campaign before it causes damage." ### Practical Steps for Your Security Team So, how do you actually make the shift? It starts with your technology. You need tools that can correlate data across multiple sources and identify commonalities between seemingly unrelated emails. But it also requires a cultural change within your team. - **Invest in threat intelligence** that provides context about attacker groups and their tactics. - **Encourage collaboration** between your SOC analysts and your threat hunting team. - **Develop playbooks** that focus on campaign response, not just individual alert triage. - **Measure success differently**—track how quickly you can shut down a campaign, not just how many emails you block. ### The Bottom Line for CISOs Look, the threat landscape isn't getting any easier. But that doesn't mean your team has to suffer. By shifting to a campaign-based mindset, you can cut through the noise, protect your organization more effectively, and give your analysts their sanity back. It's not a magic bullet, but it's a significant step in the right direction. The days of IOC fatigue are numbered, and that's a good thing for everyone. If you're ready to stop drowning in individual alerts and start seeing the bigger picture, it's time to rethink your approach. Your team—and your bottom line—will thank you for it.