Anatomy of native IIS malware


ESET researchers have discovered a set of previously undocumented malware families, implemented as malicious extensions for Internet Information Services (IIS) web server software. Targeting both government mailboxes and e-commerce transactions, as well as aiding in malware distribution, this diverse class of threats operates by eavesdropping on and tampering with the server’s communications.

Along with a complete breakdown of the newly discovered families, our new paper, Anatomy of native IIS malware, provides a comprehensive guide to help fellow security researchers and defenders detect, dissect and mitigate this class of server-side threats. In this blogpost, we summarize the findings of the white paper.

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