This attack could pose a serious security threat. You should take immediate action to stop any damage or prevent further damage from happening.
This signature detects SIPVicious security tools activity.
SIPVicious suite is a set of tools that can be used to audit SIP based VoIP systems. It currently consists of four tools:
svmap - This is a sip scanner. Lists SIP devices found on an IP range
svwar - Identifies active extensions on a PBX
svcrack - An online password cracker for SIP PBX
svreport - Manages sessions and exports reports to various formats
svcrash - Attempts to stop unauthorized svwar and svcrack scans.