RDTSC
Created the Monday 18 March 2019. Updated 1 year, 2 months ago.
The Read-Time-Stamp-Counter (RDTSC) instruction can be used by malware to determine how quicky the processor executes the program's instructions. It returns the count of the number of ticks since the last system reboot as a 64-bit value placed into EDX:EAX
.
It will execute RDTSC twice and then calculate the difference between low order values and check it with CMP condition. If the difference lays below 0FFFh
no debugger is found if it is above or equal, then application is debugged.
Code Snippets
Detection Rules
Additional Resources
External Links
The resources provided below are associated links that will give you even more detailed information and research on current evasion technique. It is important to note that, while these resources may be helpful, it is important to exercise caution when following external links. As always, be careful when clicking on links from unknown sources, as they may lead to malicious content.
- An Anti-Reverse Engineering Guide - CodeProject
- https://www.aldeid.com/wiki/RDTSC-Read-Time-Stamp-Counter
Matching Samples 10 most recent
Sample Name | Matching Techniques | First Seen | Last Seen |
---|---|---|---|
build.exe | 5 | 2024-12-01 | 4 days, 15 hours ago |
satan_ransomware.exe | 10 | 2024-11-30 | 6 days, 10 hours ago |
Xulytaikhoan.xlsx | 14 | 2024-11-26 | 1 week, 3 days ago |
MokManager.efi | 8 | 2024-11-25 | 1 week, 4 days ago |
f9a5a72ead096594c5d59abe706e...0c3b4ebd7690f2eb114a37d1a7db | 6 | 2024-11-19 | 2 weeks, 3 days ago |
f2665f89ba53abd3deb81988c0d5...4053e77fc89b98b64a31a7504d77 | 6 | 2024-11-19 | 2 weeks, 3 days ago |
ffc49c8fd266e46d2cf1f02f62b1...c88e6b01f9e022325744f55e2f07 | 5 | 2024-11-19 | 2 weeks, 3 days ago |
ffbe22e427a9aca61a1565c32137...5a56de738cbb240f7b5bb1d1dca1 | 6 | 2024-11-19 | 2 weeks, 3 days ago |
e18ac2c4a57b7b4980c63623c966...4e2bb66f2cc4a54974219818fff3 | 8 | 2024-11-19 | 2 weeks, 3 days ago |
d87df763fcbee9141be2d06a2e6c...489083d7d933dec781652dd31d32 | 5 | 2024-11-19 | 2 weeks, 3 days ago |