**7. Virus and worm signature detection**

When dealing with image files and applications, many different types of malicious software can be hidden inside them with little or no indication. It's important to recognize what some of these indicators are so you can protect your network and its users from any potential dangers. In image files, viruses and worms are often obfuscated and hidden inside data sections. Viruses can also be hidden in executables as a DLL, EXE, or other file types. Some viruses and worms, such as Ramen and MyDoom, can be detected by signature because they have been seen before, and antivirus software vendors have created signature definitions to detect them. You can check for DLLs, EXEs, and other executable files hidden in the data section of the image file using a hex editor. You can also use antivirus software to scan the image file and look for specific signatures.
