SHELLCODE: Metasploit x86/fnstenv_mov Encoder Routine Over HTTP-STC
This signature detects Metasploit shell code being sent as part of an exploit payload, specifically the Windows Execution shell, using the variable-length fnstenv/mov dword XOR encoder (x86/fnstenv_mov). This is a strong indication of malicious activity on your network.
Extended Description
Microsoft Excel is prone to a remote code-execution vulnerability. Attackers may exploit this issue by enticing victims into opening a maliciously crafted Excel ('.xls') file. Successful exploits may allow attackers to execute arbitrary code with the privileges of the user running the application.
Affected Products
Microsoft excel_2007
References
BugTraq: 23620 51284 31706 34470 18500 27658 48161 32618 16410 35246 13117 37511 20226 16953 45278 35175
CVE: CVE-2009-1134
URL: http://www.metasploit.com/modules/encoder/x86/fnstenv_mov http://www.coresecurity.com/content/foxit-reader-vulnerabilities http://www.corelan.be/advisories.php?id=CORELAN-11-001 http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=783 http://support.apple.com/kb/ht4808 http://technet.microsoft.com/en-us/security/bulletin/ms12-005 http://www.iss.net/threats/287.html http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=763 http://aluigi.altervista.org/adv/esignal_1-adv.txt http://www.zerodayinitiative.com/advisories/zdi-09-040/
Short Name
SHELLCODE:X86:FNSTENV-80S
Severity
Critical
Recommended
False
Recommended Action
Drop
Category
SHELLCODE
Keywords
CVE-2005-0555 CVE-2006-0476 CVE-2006-1043 CVE-2006-3086 CVE-2006-4694 CVE-2007-2193 CVE-2008-0105 CVE-2008-4019 CVE-2008-4265 CVE-2009-0235 CVE-2009-1134 CVE-2010-3951 CVE-2011-1276 CVE-2011-1774 CVE-2011-3494 CVE-2012-0013 Encoder HTTP-STC Metasploit Over Routine bid:13117 bid:16410 bid:16953 bid:18500 bid:20226 bid:23620 bid:27658 bid:31706 bid:32618 bid:34470 bid:35175 bid:35246 bid:37511 bid:45278 bid:48161 bid:51284 x86/fnstenv_mov
Release Date
09/25/2013
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3712
False Positive
Unknown
Vendors
Microsoft