IDA Pro Custom Assembly Calling Convention: __usercall
Added 2022-02-17 07:00:44 +0000 UTCIDA Calling Convention: __usercall
- Custom user-defined calling convention only in IDA used to define a non-standard function type
- Use the @<reg> convention to define a register argument
- Use the @<^start.end> convention to define the stack location of an argument
- Arguments without a specified location are assumed to be on the stack (right-to-left)
- Hex-Rays documentation is your friend!
Full documentation for __usercall can be found in the Hex-Rays Documentation
Practice Examples
Attached to this post is a copy of the malware shell code file from our tutorial.
**This sample is live malware please only open in a safe environment like your FLARE-VM
The sample is in a .zip file with the password infected
You are encouraged to open this sample in your FLARE-VM using IDA and identify the __usercall calling conventions.
