SymbOS.Skulls

Risk Level 1: Very Low

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Discovered:: November 19, 2004
Updated:: February 13, 2007 12:30:08 PM
Also Known As:: Skulls [F-Secure], SymbOS/Skulls [McAfee], SYMBOS_SKULLS.A [Trend Micro]
Type:: Trojan Horse
Systems Affected:: EPOC

SymbOS.Skulls is a Trojan horse that replaces the system files on the device, causing application icons to be replaced with a skull icon. By default, the Trojan has the file name "Extended Theme.sis."

Antivirus Protection Dates

Initial Rapid Release version November 20, 2004
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version November 20, 2004
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date November 23, 2004

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: Eric Chien

Technical Details

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Internet Security Threat Report, Volume 16