Hackers hide in the quiet gaps between security alerts

Attackers who break into a company network often do not set off a loud alarm. A piece in The Hacker News describes how they can spend days or weeks inside before any high-priority alert fires. When an alert finally appears, it may be just one event in a much longer sequence.

What attackers do

They use tools and traffic that look normal. Instead of an obvious scan, an attacker may use a compromised account to query a company's directory server at a modest pace, mapping users, groups and systems. A few Kerberos service ticket requests can yield credentials to crack offline, outside the security team's view. Valid logins then open services that administrators use every day, and the attacker moves from computer to computer.

Files may be gathered and compressed on one internal system. Later, that system may contact an outside destination over HTTPS or DNS at regular intervals, with timing varied just enough to look normal, as data is taken. Each step borrows something the business already depends on.

Why alerts alone fall short

A security operations center, or SOC, is the team that watches for attacks. Every SOC struggles with a pile of alerts, and very few explain how an attack started or progressed. Turning detection settings down to catch more would only bury analysts. The article calls that untenable. Analysts who study only the triggering event may miss the chained activity behind it.

Single actions rarely look suspicious. A computer that talks to a new system once is unremarkable. One that queries several internal services, signs in to a peer, opens a file-sharing session and then connects to an outside destination tells a different story. The meaning comes from the sequence over time.

Keeping network records

The article's answer is to keep the underlying network data so analysts can look back when an alert, outage or other signal gives them a reason. Tools called network detection and response, or NDR, platforms can show what kind of interaction took place, who took part, when, and how it changed over time. An endpoint alert at 2:14 p.m. shows what happened on one machine. Network evidence can extend that timeline.

AI plays a role on both sides. Attackers use it to automate reconnaissance and move faster. The article says defenders can use AI too, searching across hosts, users and time, and bringing relevant data into one view in minutes rather than hours. But the AI needs detailed network evidence to search.

What to do

• Ask your IT provider whether they keep network records to look back on, not just alerts that fire once.
• Ask whether they can build a timeline around an alert, showing what came before and after.
• Ask how they link small, ordinary-looking events across days or weeks.