alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Downloader.VB.TX/Backdoor.Win32.DSSdoor!IK Checkin"; flow:established,to_server; content:"/tx.txt"; http_uri; content:" Microsoft URL Control -"; http_header; reference:url,doc.emergingthreats.net/2003646; classtype:trojan-activity; sid:2003646; rev:9; metadata:created_at 2010_07_30, updated_at 2010_07_30;)

Added 2017-08-07 20:56:52 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Downloader.VB.TX/Backdoor.Win32.DSSdoor!IK Checkin"; flow:established,to_server; content:"/tx.txt"; http_uri; content:" Microsoft URL Control -"; http_header; reference:url,doc.emergingthreats.net/2003646; classtype:trojan-activity; sid:2003646; rev:8;)

Added 2012-05-23 22:04:27 UTC

#alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"User-Agent|3a| Microsoft URL Control -"; nocase; http_header; reference:url,doc.emergingthreats.net/2003646; classtype:trojan-activity; sid:2003646; rev:6;)

Added 2011-10-12 19:13:50 UTC

#alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"User-Agent|3a| Microsoft URL Control -"; nocase; http_header; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003646; sid:2003646; rev:6;)

Added 2011-09-14 22:26:50 UTC

#alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"User-Agent|3a| Microsoft URL Control -"; nocase; http_header; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003646; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/VIRUS/TROJAN_Downloader_General; sid:2003646; rev:6;)

Added 2011-02-04 17:22:37 UTC

#alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"|0d 0a|User-Agent\: Microsoft URL Control -"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003646; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/VIRUS/TROJAN_Downloader_General; sid:2003646; rev:4;)

Added 2010-03-08 23:15:50 UTC

#alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"|0d 0a|User-Agent\: Microsoft URL Control -"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003646; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/VIRUS/TROJAN_Downloader_General; sid:2003646; rev:4;)

Added 2010-03-08 23:15:50 UTC

#alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"User-Agent\: Microsoft URL Control -"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003646; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/VIRUS/TROJAN_Downloader_General; sid:2003646; rev:3;)

Added 2009-02-12 18:21:15 UTC

#alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"User-Agent\: Microsoft URL Control -"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003646; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/VIRUS/TROJAN_Downloader_General; sid:2003646; rev:3;)

Added 2009-02-12 18:21:15 UTC

#alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"User-Agent\: Microsoft URL Control -"; nocase; classtype:trojan-activity; sid:2003646; rev:2;)

Added 2008-01-31 10:12:23 UTC

#alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"User-Agent\: Microsoft URL Control -"; nocase; classtype:trojan-activity; sid:2003646; rev:2;)

Added 2008-01-31 10:12:23 UTC

#alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"User-Agent\: Microsoft URL Control -"; nocase; classtype:trojan-activity; sid:2003646; rev:1;)

Added 2007-05-08 16:30:20 UTC

This is a legit UA used by MS VB packages. Not unique to this trojan. Scheduled to be deleted.

-- MattJonkman - 09 May 2007

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE TROJAN Downloader.VB.TX User Agent Detected (Microsoft URL Control)"; flow:established,to_server; content:"User-Agent\: Microsoft URL Control -"; nocase; classtype:trojan-activity; sid:2003646; rev:1;)

Added 2007-05-07 13:45:19 UTC