DoubleAgent Attack Turns Your Antivirus Into Malware And Hijacks Your PC
How does DoubleAgent attack work?
Some of you might be knowing about Microsoft Application Verifier. It’s a Windows tool that comes loaded with all the versions of Microsoft Windows. Whenever an application tries to run, Application Verifier verifies it.
Cybellum researchers discovered an undocumented ability that can allow an attacker to inject a custom verifier into any application. By doing so, the attacker can gain complete control over the computer. This attack gives an attacker the ability to inject any DLL into any process. This ad injection takes place extremely early during the victim’s boot process.
DoubleAgent can even continue injecting code after reboots. This makes it a perfect persistency technique. Even if the victim would completely uninstall and reinstall the program, the attacker’s DLL would still be injected when the process executes.
If we talk about the attack vector that targets antivirus software, DoubleAgent has the ability to turn an antivirus into malware, modify the internal behavior of an antivirus, modify the trusted nature of an antivirus, destroy the system, or denial of service.