INDICATOR-OBFUSCATION -- Snort detected a system behavior that suggests the system has been affected by malware. That behavior is known as an Indicator of Compromise (IOC). The symptoms could be a wide range of behaviors, from a suspicious file name to an unusual use of a utility. Symptoms do not guarantee an infection; your network configuration may not be affected by malware, but showing indicators as a result of a normal function. This alert specifically refers to a method of disguising code, known as obfuscation. Obfuscation methods are used to perform innocent convenience tasks (for instance, Javascript used to condense Jquery scripts, or a compiler using obfuscation to protect the full code for NDA reasons), or it could be used to hide an attack.
INDICATOR-OBFUSCATION known suspicious decryption routine
This event is generated when an attempt is made to exploit a known vulnerability in ie. Impact: Denial of Service. Information disclosure. Loss of integrity. Complete admin access. Details: Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS) token sequences and the clip attribute, aka an "invalid flag reference" issue or "Uninitialized Memory Corruption Vulnerability," as exploited in the wild in November 2010. Ease of Attack: Simple. Exploits exist.
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No public information
No known false positives
Cisco Talos This document was generated from data supplied by the National Vulnerability Database. A product of the National Institute of Standards and Technology. For more information see http://nvd.nist.gov/
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