SymbOS.Locknut

Risk Level 1: Very Low

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Discovered:: February 2, 2005
Updated:: February 13, 2007 12:32:47 PM
Also Known As:: Locknut.A [F-Secure], SYMBOS_LOCKNUT.A [Trend Micro], SYMBOS_LOCKNUT.B [Trend Micro]
Type:: Trojan Horse
Systems Affected:: EPOC

SymbOS.Locknut is a Trojan horse program that uses a vulnerability to cause devices running Symbian OS v7.0s to crash. A minor variant of this Trojan also installs a version of SymbOS.Cabir or SymbOS.Cabir.B on the compromised device.

Antivirus Protection Dates

Initial Rapid Release version February 2, 2005
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version February 2, 2005
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date February 2, 2005

Click for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

Wild Level: Low
Number of Infections: 0 - 49
Number of Sites: 0 - 2
Geographical Distribution: Low
Threat Containment: Easy
Removal: Easy

Damage

Damage Level: Low

Distribution

Distribution Level: Low

Writeup By: Robert X Wang

Technical Details

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Internet Security Threat Report, Volume 16