Forums
New posts
Search forums
News
Security News
Technology News
Giveaways
Giveaways, Promotions and Contests
Discounts & Deals
Reviews
Users Reviews
Video Reviews
Support
Windows Malware Removal Help & Support
Mac Malware Removal Help & Support
Mobile Malware Removal Help & Support
Blog
Log in
Register
What's new
Search
Search titles only
By:
Search titles only
By:
Reply to thread
Menu
Install the app
Install
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Security
Video Reviews - Security and Privacy
Windows Defender Process Reimaging Filepath Bypass Demo (by McAfee)
Message
<blockquote data-quote="Andy Ful" data-source="post: 821263" data-attributes="member: 32260"><p>It seems that Process Reimaging is related to some vulnerable Windows APIs which can retrieve file name and file path of already running executable. So any AV which uses those APIs is vulnerable to this attack, too. In June 2019 M$ has released a partial patch, closing file name attack vector in Windows 10. That is why the video was published a year after disclosing the vulnerability.</p><p></p><p>"<em>McAfee Advanced Threat Research submitted Process Reimaging technique to Microsoft on June 5th, 2018. Microsoft released a partial mitigation to Defender in the June 2019 Cumulative update for the Process Reimaging FILE_OBJECT filename changes attack vector only. This update was only for Windows 10 and does not address the vulnerable APIs in Table 1 at the OS level; therefore, ESSs are still vulnerable to Process Reimaging. Defender also remains vulnerable to the FILE_OBJECT filepath changes attack vector executed in the bypass demo video, and this attack vector affects all Windows OS versions.</em>"</p><p></p><p>Windows ver. 1903 is also vulnerable to this attack, but it is harder to perform because of Tamper Protection. The attacker has to use the 0-day exploit for Process Reimaging and 0-day payload (in place of Mimikatz). The attack with Mimikatz will fail if WD is not temporarily disabled.</p></blockquote><p></p>
[QUOTE="Andy Ful, post: 821263, member: 32260"] It seems that Process Reimaging is related to some vulnerable Windows APIs which can retrieve file name and file path of already running executable. So any AV which uses those APIs is vulnerable to this attack, too. In June 2019 M$ has released a partial patch, closing file name attack vector in Windows 10. That is why the video was published a year after disclosing the vulnerability. "[I]McAfee Advanced Threat Research submitted Process Reimaging technique to Microsoft on June 5th, 2018. Microsoft released a partial mitigation to Defender in the June 2019 Cumulative update for the Process Reimaging FILE_OBJECT filename changes attack vector only. This update was only for Windows 10 and does not address the vulnerable APIs in Table 1 at the OS level; therefore, ESSs are still vulnerable to Process Reimaging. Defender also remains vulnerable to the FILE_OBJECT filepath changes attack vector executed in the bypass demo video, and this attack vector affects all Windows OS versions.[/I]" Windows ver. 1903 is also vulnerable to this attack, but it is harder to perform because of Tamper Protection. The attacker has to use the 0-day exploit for Process Reimaging and 0-day payload (in place of Mimikatz). The attack with Mimikatz will fail if WD is not temporarily disabled. [/QUOTE]
Insert quotes…
Verification
Post reply
Top