An attack which can be performed with a steganographic approach is detecting the presence of information in a file. There are three challenges involved in steganalysis. First, there is no guarantee for the presence of hidden data in a file. Second, there is a possibility for a data encrypted in the file. Third, for efficient transmission of message sender may add a noise in a cover medium. For overcoming theses challenges StegAnalyzer, a Blind Universal steganalysis tool to observe the existence of hidden messages in a cover medium is proposed. The proposed tool will be able to discriminate between the normal image and an image which holds the message.