All posts tagged rcrypt

Happy [after] April Fools!

I was wondering how long I’d let my site be “defaced” but then decided the novelty wore off pretty quickly (especially since the layout looked even better! ha). It was enjoyable watching a crap load of people download the dumped source to rcrypt. If you compile and run it you’ll enjoy a nice lil surprise. If you didn’t do this already, well, you should have =]

Anyway if you want to check out the defaced site feel free to click [april fools].

There will be a new tool coming soon. I’ve been super swamped with work and find almost no time these days for my own personal projects which is a bit depressing. I will continue to code but my free time seems to be dwindling. I hope to have this next tool released sometime soon.

I’ve finally released rcrypt 1.5 via a newly launched website over at (http://rcrypt.0xrage.com). Not only is rcrypt 1.5 available there but some other classic packers as well! The purpose of this site is to allow users to play with various packers without having to mess around with the packer binaries themselves. Not everyone wants to run a random exe and feel safe afterwards. As for me, I triple click all exes especially from emails from people I’ve never spoken to before!

In anycase rcrypt 1.5 is available to all users of the website and as an added bonus I’ll be creating custom ones for users who are interested and making them available to them via the rcrypt web frontend website. This makes it easier for me and hopefully the user as well.

If anyone wants to contribute their own packers or just any packer please contact me and I’ll be happy to add it to the list! There are only a few currently in the system but as time goes on I will add support for more.


rcrypt 1.5

rcrypt 1.5


For users of the command line versions of rcrypt there have always been easter eggs built into the binary. Since noone has actually bothered to look I will simply share one of them now!

rcrypt.exe [your binary] -h4x

This of course works with the optional parameters as well.

Have fun!

Version 1.4 adds support for eof data. I hadn’t realized until someone commented but rcrypt destroyed any extraneous data which caused issues with any binaries that made use of this data. This has since been fixed!

MD5 Sum: 40fba75715011b13fd4521163151dbb9
SHA1 Sum: c95dc3708ba8ffafb37e21d5f12b635806fd4a00
Download: rcrypt 1.4

archive pw: 0xrage.com

rcrypt 1.3

Added functionality:
– breaks certain automated analysis engines
– added polymorphism to various other existing functionlities

If you don’t know what rcrypt is check out the original post

md5 sum: 80cc3105b0f035daa0cd19e85bc7c379
sha1 sum: 345fb729fcda1ef5bf004869abc1634092685718

download rcrypt

archive pw: 0xrage.com

rcrypt version 1.2 is now released!

rcrypt is a Windows PE binary crypter (a type of packer) that makes use of timelock techniques to cause a delay in execution. This delay can cause analysis to fail on time constrained systems such as on disk scanners. rcrypt can pack exes and dll files. PEs that use tls or other interesting features of the PE spec are not currently supported. I may add support for more spec features as time permits. In version 1.0 and 1.1 your funky active X and COM files will not work. If there is enough interest I will consider adding other features/support.

rcrypt features include:

encryption of all code/data

timelock puzzle

This is just a proof of concept tool to showcase the potential use of these techniques as well as potential shortcomings of various detection systems.

rcrypt is being released for educational purposes. I do not condone malicious or illegal use of this tool. Using this tool might also cause you to experience light headedness or fatigue. I also take no responsibility for any of these potential outcomes. Use your own discretion.

rcrypt 1.2

Minor re-addition of some internal functionality that was removed from versions 1.0 and 1.1 due to issues with windows xp/7 and 32/64 bit. Issues resolved and 1.2 is now out.

File MD5 sum: 1c0989a751038a49052a4e37f8879f43

File SHA1 sum: 4c22b51e466fd2516c68c94c2dd5f4dbf1bc395b

rcrypt v1.2 (File archive password: 0xrage.com)


rcrypt 1.1

Added in rcrypt version 1.1 is the optional switch -trick0. Read the readme for details.

File MD5 sum: 6c53c7d7dc6b342174b1eda13597c771

File SHA1 sum: 30f6fbf6c615269b6c894f7eec125a03c4cd5afd

rcrypt 1.1 (File archive password: 0xrage.com)