Executive Risk Summary
"A remote code execution vulnerability exists in the TrueType font parsing engine in win32k.sys, allowing attackers to execute arbitrary code via crafted font data. This vulnerability was exploited in the wild by the Duqu malware in November 2011."
Anticipated Attack Path
- 1. Initial Exploitation: Attacker sends a crafted font file to the victim
- 2. Privilege Escalation: Exploited code executes with kernel-mode privileges
- 3. Lateral Movement: Malware spreads to other systems on the network
Am I Vulnerable?
- Verify if the system is running a vulnerable version of Windows
- Check for the presence of the Duqu malware
- Apply the MS11-087 security update to patch the vulnerability
Operational Audit Arsenal
Target Type System File
Target Asset win32k.sys
Standard Path C:\Windows\System32\drivers\win32k.sys
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: win32k.sys (System File)
$Targets = 'win32k.sys'
$SearchPaths = @("$env:windir\System32", "$env:ProgramFiles", "${env:ProgramFiles(x86)}")
Get-ChildItem -Path $SearchPaths -Include $Targets -Recurse -ErrorAction SilentlyContinue |
Select-Object FullName, @{Name="Version";Expression={$_.VersionInfo.ProductVersion}}Patch Impact Forecast
Reboot Required Likely
System restart required, potential disruption to running applications
Internal Work Notes
Apply MS11-087 security update to patch TrueType font parsing engine vulnerability in win32k.sys, exploited by Duqu malware.
Technical Intelligence & Operational Utilities • Delivered Weekly
Intelligence Sources
Official Advisoryhttp://blogs.mcafee.com/mcafee-labs/the-day-of-the-golden-jackal-%E2%80%93-further-tales-of-the-stuxnet-files
Official Advisoryhttp://blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspx
Official Advisoryhttp://isc.sans.edu/diary/Duqu+Mitigation/11950
Official Advisoryhttp://secunia.com/advisories/49121
Official Advisoryhttp://secunia.com/advisories/49122
MSRC Advisoryhttp://technet.microsoft.com/security/advisory/2639658
Official Advisoryhttp://www.securelist.com/en/blog/208193197/The_Mystery_of_Duqu_Part_Two
Official Advisoryhttp://www.securitytracker.com/id?1027039
Official Advisoryhttp://www.symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploit
Official Advisoryhttp://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/w32_duqu_the_precursor_to_the_next_stuxnet.pdf
Official Advisoryhttp://www.us-cert.gov/cas/techalerts/TA11-347A.html
Official Advisoryhttp://www.us-cert.gov/cas/techalerts/TA12-129A.html
Official Advisoryhttp://www.us-cert.gov/cas/techalerts/TA12-164A.html
Official Advisoryhttp://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-291-01E.pdf
MSRC Advisoryhttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087
MSRC Advisoryhttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-034
MSRC Advisoryhttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-039
Official Advisoryhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13998
Official Advisoryhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15290
Official Advisoryhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15645
Official Advisoryhttp://blogs.mcafee.com/mcafee-labs/the-day-of-the-golden-jackal-%E2%80%93-further-tales-of-the-stuxnet-files
Official Advisoryhttp://blogs.technet.com/b/msrc/archive/2011/11/03/microsoft-releases-security-advisory-2639658.aspx
Official Advisoryhttp://isc.sans.edu/diary/Duqu+Mitigation/11950
Official Advisoryhttp://secunia.com/advisories/49121
Official Advisoryhttp://secunia.com/advisories/49122
MSRC Advisoryhttp://technet.microsoft.com/security/advisory/2639658
Official Advisoryhttp://www.securelist.com/en/blog/208193197/The_Mystery_of_Duqu_Part_Two
Official Advisoryhttp://www.securitytracker.com/id?1027039
Official Advisoryhttp://www.symantec.com/connect/w32-duqu_status-updates_installer-zero-day-exploit
Official Advisoryhttp://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/w32_duqu_the_precursor_to_the_next_stuxnet.pdf
Official Advisoryhttp://www.us-cert.gov/cas/techalerts/TA11-347A.html
Official Advisoryhttp://www.us-cert.gov/cas/techalerts/TA12-129A.html
Official Advisoryhttp://www.us-cert.gov/cas/techalerts/TA12-164A.html
Official Advisoryhttp://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-291-01E.pdf
MSRC Advisoryhttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-087
MSRC Advisoryhttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-034
MSRC Advisoryhttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-039
Official Advisoryhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13998
Official Advisoryhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15290
Official Advisoryhttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15645
Official Advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2011-3402
Related Microsoft Threats
Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.