![]() ![]() It is a simple renaming technique, where all characters followed by U+202e are displayed in reversed order. The Unicode character U+202e allows to create a filename that masquerades the actual extension of a file. Both string and integer literals are decrypted at runtime. The C# obfuscator replaces symbol names with barely distinguishable Unicode characters. Strings are not stored in the data section, but instead constructed on the stack using mov-opcodes. ObfuscationĪssembly code is obfuscated by nop-like instructions intermingled with the actual code, such as an increment followed by a decrement. Hence, AV detection is limited to the stub itself. Because the resulting data has no repeating patterns, it is impossible to identify this particular encoding and infer YARA rules from it. To decrease entropy, the encrypted shellcode is intermingled with null-bytes at randomized offsets. The shellcode is encrypted using a proprietary 4-byte XOR stream cipher. Stage 2 contains all the "suspicious" code that is not readable at scantime and not decrypted, if an emulator is detected. To mitigate AV detections, only the stub requires adjustments. The second stage is position independent shellcode that retrieves function pointers from the PEB and handles the payload. The fundamental concept is that the stub only contains code to detect emulators and to decrypt and pass execution to the next layer. ![]() This graph illustrates the execution flow of the native stub decrypting and executing a PE file. The exact implementation is fine tuned to decrease detection and is subject to change in future releases. Obfuscation and evasive features are fundamental to the design of PEunion and do not need further configuration. Legitimate files with no known signatures can be written to the disk. If the executable is a native PE file, RunPE (process hollowing) is used. Typically, an executable is decrypted and executed in-memory by the stub. A file can either be embedded within the compiled executable, or the stub downloads the file at runtime. Multiple files can be compiled into the stub. Specify icon, version information & manifest.Two stubs are available to choose from, both of which work in a similar way. This has given us an advantage, allowing us to effectively keep files fully undetected from analysis.PEunion encrypts executables, which are decrypted at runtime and executed in-memory. During this period the team have pushed the limits with undetectable encryption software and discovered private crypting strategies along the way. CypherX has been through rigorous development and testing for over 3 years. Unlike other crypters, CypherX is a professional solution that can be trusted to protect and undetect your files properly. Professional ticketing system and live instant messaging support systems.įully undetected from over 35 antivirus solutions. The private storage methods and polymorphic encryption create longer lasting FUD. Icon changer allows you to change the icon of protected files The Multi File Binder allows you to bind as many files as you want NET and CĬompatible with any kind of software, including Remote Administration Tools Protected files do not require dependenciesĢ Crypting engines to choose from. Slick and simple design, anyone can use CypherX easily without prior knowledge ![]() Buy or download a private FUD crypter today. ![]() CypherX Crypter ensures maximum security from reverse engineering and antivirus false positives, making it a perfect choice for penetration testers or developers. CypherX Crypter is a unique type of FUD crypter that will protect your files using undetectable encryption and obfuscation algorithms. ![]()
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