Why doesn't malware always activate in a security testing lab?

Short answer: Attackers design malware to stay dormant unless it receives a validation signal from a live command-and-control (C2) server they control. By the time a sample reaches a malware database, the C2 infrastructure has usually moved — so researchers are often testing an orphaned sample that does nothing. 
 Why attackers build in dormancy 
 
 Minimizing intelligence: dormant malware performs no observable malicious actions, giving analysts less to document and vendors less to build signatures from. 
 Preventing hijacking: requiring a secret handshake ensures a rival or researcher who seizes the C2 server can't simply task the malware and collect the stolen data. 
 
 What this means for evaluating security tools 
 A lab test against a disconnected sample measures very little. The meaningful question is not whether a tool reacts to dormant malware sitting inert, but whether it stops live, fast-moving attacks as they happen. Cyber Crucible is built for the latter: it monitors the identity- and data-theft entry points that real attacks target, assesses intent in under 200 milliseconds, and stops the theft before it succeeds.