Cyber Risks · Krebs on Security

Experts Warn of New Windows Shortcut Flaw

Summary: VirusBlokAda reported that on June 17 its specialists found two malware samples capable of infecting a fully-patched Windows 7 system when a user viewed an infected USB drive in Windows Explorer, exploiting a flaw in how Windows handles .lnk shortcut files. The malware installs two rootkit drivers, mrxnet.sys and mrxcls.sys, both signed with the digital signature of Realtek Semiconductor Corp., and researcher Frank Boldewin said the samples appeared to target Siemens WinCC SCADA systems.

What's compelling: The malware was built to hunt Siemens WinCC SCADA systems controlling manufacturing and power plants, and Boldewin assessed it was made for espionage - a targeted capability that arrived with a legitimate company's code-signing signature attached.

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Topics
Vulnerabilities & Patching
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