General Indicators of Malicious Activity (Domain 2)
Not every security breach begins with a smoking gun—many start with subtle shifts in system behavior that point to something being off. This episode explores general indicators of malicious activity, such as unusual account lockouts, concurrent session usage, blocked or inaccessible content, spikes in resource consumption, and impossible travel—where a user logs in from geographically distant locations in implausible timeframes. We also discuss signs like the absence of expected logs, unauthorized software installations, and abnormal changes to system files or configurations. These anomalies might not be malicious on their own, but when correlated, they often point to credential theft, insider misuse, or malware activity. We emphasize the importance of context-aware detection, behavioral baselining, and alert tuning to separate signal from noise. Good security isn’t just about reacting to alerts—it’s about recognizing when normal stops looking normal.
