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Digital Guardian's cybersecurity chief explains how to spot intrusions and password dumping programs, locate dropper software, and block secret backdoors in your company's network. Cybersecurity is a reality for every company, Bandos said, and getting business to understand the reality of digital threats is a slow process.

Bandos is right to suspect most companies don't prioritize cyber-resiliency. Recent data suggests an average day lag between when cyber-strikes hit and are detected by most companies. Companies and consumers have experienced multiple waves of technological change in the past decade. Attacks can originate both inside and outside your company, and pursuing cyber threats is a lot like convention sleuthing.

Digital Guardian's enterprise threat report explains the details of where most companies are vulnerable and how to sniff out threats. First, Bandos said, determine threat vectors and points of access. Gather data about your system, potential vulnerabilities, and previous hacks. If there are hundreds or even billions of events, the hunting process whittles away the noise like a digital wood carver chipping away to reveal his masterpiece.

The data aggregation and culling process should reveal a short list of suspicious activities. Proxy logs are a great place to start hunting, he said, because warning signs like slow connections and automated behavior are easy to spot. In an interview with TechRepublic, Bandos detailed the threat hunting process and best practices for rooting out and responding to intrusions.

Low and slow connections: Is traffic being sent out port 22 through proxy servers or even firewalls? Of course it's good practice to source-restrict this clear-text protocol, but if it's not locked down, look for any exfiltration patterns in the data. Same number of bytes in and out: Do any network connections exhibit the same pattern of bytes in and bytes out each day? This was more prevalent several years ago, but malware today still leverages this technique of beaconing out to its master to let them know they've implanted successfully.

Monitoring for the same amount of bytes up and bytes down on a frequent basis could reveal a sign of suspicious activity. Suspicious sites: Identify a listing of all dynamic DNS sites that are visited by endpoints and look specifically at the outliers across your organization.

If only three machines out of 20, visit one specific site, command and control infrastructure may be at fault.

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