Trend Micro's security products will detect Stuxnet, but the company decided to build a tool that would let other people not using its products detect the malware, said David Sancho, a senior researcher with Trend Micro. Administrators may also want to run the tool to verify that their security software is indeed detecting and removing the program, he said.

The Stuxnet tool can scan all computers within a specific Internet Protocol range. To find the malware, the tool transmits spoofed packets that are similar to the packets sent by the two or three Stuxnet variants. If Stuxnet is present, it will respond to the spoofed packets.