Menu
Data-stealing malware pretends to be Microsoft IIS server module

Data-stealing malware pretends to be Microsoft IIS server module

Most antivirus products aren't detecting the malware, called "INS"

Trustwave's SpiderLabs researchers have found a piece of malware that collects data entered into Web-based forms, pretending to be a module for Microsoft's Internet Information Services (IIS) web-hosting software.

The malware, which is dubbed "ISN," hasn't been widely seen, but its characteristics are interesting, wrote Josh Grunzweig, a Trustwave malware researcher, on a company blog.

ISN is a malicious DLL (dynamic link library), which is installed as a module for IIS, Grunzweig wrote. ISN's installer contains four versions of the DLL, one of which is served up depending on whether a victim uses the 32- or 64-bit version of IIS6 or IIS7+.

"This module is of particular concern as it is currently undetectable by almost all anti-virus products," Grunzweig wrote.

If ISN's installer is detected, it's usually through "general heuristic detection," Grunzweig wrote, which means security software is looking at aspects of it that are suspicious and flagging it, such as if it is sending data to another server.

"I'm using this post as a way of notifying anti-virus vendors so that specific detections for this malware may be written," he wrote, adding that he thinks the malware is "pretty neat."

ISN collects data from POST requests, Grunzweig wrote. The stolen information is lifted from within IIS itself, which circumvents encryption, and then sent elsewhere. The malicious module can be configured to monitor information from specific URIs (uniform resource identifier), he wrote.

The malware has so far been "seen targeting credit card data on e-commerce sites, however, it could also be used to steal logins, or any other sensitive information sent to a compromised IIS instance," he wrote.

"Overall, this malware does not appear to be widely spread and has only been seen in a few forensic case instances," Grunzweig wrote. "However, the extremely low detection rate in collaboration with the malware's targeted functionality makes this a very real threat."

Send news tips and comments to jeremy_kirk@idg.com. Follow me on Twitter: @jeremy_kirk


Follow Us

Join the New Zealand Reseller News newsletter!

Error: Please check your email address.

Tags trustwavesecurityExploits / vulnerabilitiesmalware

Featured

Slideshows

Kiwi channel comes together for another round of After Hours

Kiwi channel comes together for another round of After Hours

The channel came together for another round of After Hours, with a bumper crowd of distributors, vendors and partners descending on The Jefferson in Auckland. Photos by Maria Stefina.​

Kiwi channel comes together for another round of After Hours
Consegna comes to town with AWS cloud offerings launch in Auckland

Consegna comes to town with AWS cloud offerings launch in Auckland

Emerging start-up Consegna has officially launched its cloud offerings in the New Zealand market, through a kick-off event held at Seafarers Building in Auckland.​ Founded in June 2016, the Auckland-based business is backed by AWS and supported by a global team of cloud specialists, leveraging global managed services partnerships with Rackspace locally.

Consegna comes to town with AWS cloud offerings launch in Auckland
Veritas honours top performing trans-Tasman partners

Veritas honours top performing trans-Tasman partners

Veritas honoured its top performing partners across the channel in Australia and New Zealand, recognising innovation and excellence on both sides of the Tasman. Revealed under the Vivid lights in Sydney, Intalock claimed the coveted Partner of the Year 2017 (Pacific) award, with Data#3 acknowledged for 12 months of strong growth across the market. Meanwhile, Datacom took home the New Zealand honours, with Global Storage and Insentra winning service provider and consulting awards respectively. Dicker Data was recognised as the standout distributor of the year, while Hitachi Data Systems claimed the alliance partner award. Photos by Bob Seary.

Veritas honours top performing trans-Tasman partners
Show Comments