Normally free remote keyloggers will create standard .exe installation file without any stealth feature. That keylogger file are easily detected by popular antiviruses. So Eventually your key-logging job will remain Incomplete.
You would have probably heard about binders and Crypters before, but what do they used for? and why they are used in keylogging process? Let us know about Crypter and Binder.
What is Crypter?
It is a software that can encrypt executable (.exe) files. Crypters are popularly used to encrypt viruses, RAT’s, keyloggers, spywares etc to make them undetectable from antiviruses.
How Does FUD Crypter Work?
The Crypter takes the original binary file of you exe and applies many encryption on it and stores on the end of file (EOF). So a new crypted executable file is created. The Basic Working Of FUD Crypter is explained below
Original Exe Crypted Exe
001————- 010 101————-110
100|Original File|000 > -> Cryptor -> -> 010|Original File|110
010————- 111 110————-010
The new exe is not detected by antiviruses because its code is scrambled by the crypter. When executed the new .exe file decrypts the binary file into small the data small pieces at a time and injects them into another already existing process or a new empty one, OR it drops the code into multiple chunks in alternative data streams (not scanned by most a/v) then executes it as a .txt or .mp3 file.
What is Binder?
Binder is a software basically used for combine the two or more files in one file under only one name and extension.
The files to be binded can have any extension or icon. The user has choice to select the name, icon and various attributes of binded file.
Why Most FUD Crypters Do not Work?
Where can You test Whether your Crypter is FUD or not?
You can try these Crypters and Binders that are available publicly:
1) Chrome Crypter v2.0
2) 0crypter v5.0.8
Download: 0crypter v5.0.8 – FUD.rar
3. Star Crypter v1.2
Download: Star Crypter v1.2
4. Dev Point Crypter v3.0
Download: Dev Point Crypter v3.0
5. Patch Worx Crypter
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