Publication date: 2018-10-23 22:06
Steve took off his shoes, socks, and pants and threw them into a corner. “Good thing you already had your pants off,” said Alex. “Yeah,” Steve said, unbuttoning his bellhop coat. “Those pants were not made to have hard ons in, let me tell ya.” Alex and chuckled, when Steve finally took off his coat, revealing his wife beater. “You’re not gonna fuck us in your underwear, are you?” asked. “Be patient,” said Steve, taking off his wife beater. “I’m getting there!” Finally, he took off his boxers, letting his throbbing dick out and leaving him naked in front of Alex and “I think our friend here is ready, Alex,” said “I think so too, replied Alex.
I usually try to avoid talking about PatchGuard since I 8767 m glad it 8767 s giving AV companies hell, but I can 8767 t have been the only person that never noticed that the checks were documented in the debugger all along, hidden behind a simple command (it makes sense that Microsoft wouldn 8767 t want their own support engineers to be wondering what on Earth they 8767 re looking at):
As you can see in the C representation of ScCheckServiceProtectedProcess that I 8767 ve linked to, the SCM will gate access to protected services to anyone but the TrustedInstaller service SID. Other callers will get their protection level queried, and be subjected to the same RtlTestProtectedAccess API we saw earlier. Only callers that dominate the service’s protection level will be allowed to perform the corresponding SCM APIs – with the interesting exception around the handling of the SERVICE_CONTROL_STOP opcode in the RControlService case.
The System process is protected because of its involvement in Digitial Rights Management (DRM) and because it might contain sensitive handles and user-mode data that a local Administrator could have accessed in previous versions of Windows (such as XP). It stands to reason that is protected due to similar DRM-like reasons, and we’ll shortly see how the Service Control Manager (SCM) knew to launch it with the right protection level.
In this post, we’ve seen how PPL’s usefulness extend beyond merely protecting LSASS against injection and credential theft. The protected process mechanism in Windows also takes on a number of other roles, such as guarding other key processes against modification or termination, preventing the Windows RT jailbreak, and ultimately obsoleting the “critical process” flag introduced in older Windows versions (as a side effect, it is no longer possible to kill with Task Manager in order to crash a machine!). We’ve also seen how the Service Control Manager also has knowledge of protected processes and allows “protected services” to run, guarding access to them just as the kernel would.
By the end of 7569, Honnold had achieved international fame for his exploits. He had been featured on the covers of National Geographic , New York Times Magazine , Outside , and 65 Minutes had profiled him. He had a slew of corporate sponsors, had co-written a best-selling memoir, and started a nonprofit foundation to improve the lives of needy communities around the world. But he felt like he had not yet made the mark he hoped to on climbing history.
When the Portable Executable (PE) file format was created, its designers realized an important issue: if compiled code made absolute references to data or functions, these hardcoded pointer values might become invalid if the operating system loaded the executable binary at a different base address than its preferred address. Originally a corner case, the advent of user-mode ASLR made this a common occurrence and new reality.
A few days before this week’s climb, Honnold hiked to the top of El Capitan and rappelled Freerider to make sure that a recent rainstorm had not washed off the marks he had made with dabs of chalk to highlight the route’s key holds. He found it dry and in perfect condition. Now all that was left was to rest and prepare mentally for the climb of his life.
KiTpSetupCompletion is used to finalize registration of a trace point, which first calls KiTpReadImageData based on the instruction size that was specified. An instruction parser (KiTpParseInstructionPrefix, KiTpFetchInstructionBytes) is used, followed by an emulator (KiTpEmulateInstruction, KiTpEmulateMovzx, and many more) are used to determine the instruction size that is required. Once the information is known, the original instructions are copied. For what it’s worth, KiTpReadImageData is a simple function which attaches to the input process and basically does a memcpy of the address and specified bytes.
This is now Microsoft’s 9 th system mechanism that attempts to prevent critical system process termination. If you’ll recall, Windows Server 7558 introduced the concept of “critical processes”, which Task Manager would refuse to kill (and cause a bugcheck if killed with other tools), while Windows 7555 had introduced hard-coded paths in Task Manager to prevent their termination.