virus signature


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virus signature

The binary pattern of the machine code of a particular virus. Antivirus programs compare their database of virus signatures with the files on the hard disk and removable media (including the boot sectors of the disks) as well as within RAM. The antivirus vendor updates the signatures frequently and makes them available to customers via the Web. See antivirus program.
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References in periodicals archive ?
Comparing the two-level structure and hierarchical structure of virus signature, the intrinsic relationship among A1 on the first level structure is consistent with that in the hierarchical structure, while class A2 has the dispersed structure where the feature viruses in different subtypes scatter in chaos, which indicates that constructing the second level structure is meaningful.
Because of this, we were able to use the same virus signature scanning technique to detect many of the encrypting viruses.
Indicators of Compromise: Track IOCs such as virus signatures, specific traffic patterns, specific IP addresses, malware, specific URLs, or domains of known illicit activity using continuous network monitoring.
Traditional anti-virus (AV) operates on a "signature-based" system: The AV engine compares files and activities to a database of known virus signatures, and if it finds a match, it deletes or quarantines the offending file and pops up a warning.
They were also able to "inject virus signatures into an anti-virus app to detect arbitrary apps as a virus or disable virus detection completely."
"We temporarily stopped Coreflood from running on infected computers in the United States and have stopped Coreflood from updating itself, thereby enabling anti-virus software vendors to release new virus signatures that can recognize the latest versions of Coreflood," the FBI wrote in a filing.
By limiting the defendants ability to control the botnet, computer security providers will be given time to update their virus signatures and malicious software removal tools so that all victims can have a reliable tool available to them that removes the latest version of the malware from an infected computer.
ESET uses a unique approach to the problem with ThreatSense, a community-based technology that offers proactive protection against new viruses in the early hours of their spreading while the experts in ESET's labs work on creating a new signature, which is added to the virus signatures database of NOD32.
The preventive capabilities of IronPort's VOFs provide a critical first layer of defense against such new outbreaks hours and even days before traditional anti-virus solutions can generate virus signatures. This is essential for organizations that rely on the internet, and email communications in particular, for operational viability," said Ray Kafity, Regional Sales Manager -- Middle East, North Africa and Pakistan, IronPort Systems, IronPort.
A production system could also scan incoming files for virus signatures.
Antivirus software is no longer just an option but a necessity, and keeping virus definitions current is a must, as new virus signatures are discovered almost every day.
According to Frazzini, the problem of keeping up with savvy code writers is compounded by another issue: The time needed to create, distribute, and install virus signatures when a new virus is discovered makes the update process cumbersome and reactive.