A server-based system for generation of heuristic scripts for malware detection includes an automatic heuristics generation system for generating heuristic scripts for curing malware infections; a log database containing logs of events from user computers, including detection of known malicious objects and detection of suspicious objects; a safe objects database accessible containing signatures of known safe objects; a malicious objects database containing signatures of known malicious objects. The system retrieves suspect object metadata from the log database and generates the heuristic script based on data from the safe and malicious objects databases. For multiple computers having the same configuration and having the same logs, only one log common to all the multiple computers is transmitted and only one heuristic script is distributed to the multiple computers. A different and specific heuristic script is distributed to those computers that have a different log than the common log.