Saagar Jha

> On Apr 23, 2020, at 21:26, Allan Odgaard via Cocoa-dev 
> <cocoa-dev@lists.apple.com> wrote:
> 
> On 24 Apr 2020, at 9:57, Rob Petrovec wrote:
> 
>>> Also weird, why would it phone home for a shell script which has neither 
>>> been stapled nor even code-signed?
>> I think you answered the question just then…  a "shell script which has 
>> neither been stapled nor even code-signed”.  Google XProtect & Gatekeeper.
> 
> GateKeeper is basically Safari adding a quarantine flag (via extended 
> attributes)

Nit: not just Safari; other applications do this to at their discretion when 
appropriate (for example, if they too download files from the internet). 
Quarantine is just one part of GateKeeper.

> to files downloaded form the internet, and then having Finder check this 
> flag, throwing up a dialog if the flag is set, and recently, also checking if 
> the code signature is from a verified developer (possibly refusing to launch 
> at all, if not).
> 
> XProtect is basically a blacklist that applications are checked against. If 
> an application matches, it’s considered malware. The blacklist is a local 
> file on your system but updated by Apple.
> 
> These things operate very differently than having low-level system calls 
> potentially contact Apple’s servers every time a process is launched on your 
> system (or, as it appears to be the case on my system, when processes are 
> accessing certain locations in the file system).
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