KANAL - Krypto Analyzer for PEiD

Version 2.92

This plugin searches for known crypto algorithms, functions and libraries inside of the specified module.

Usage:

Crypto name :: File offset :: Virtual address

For PE executable files, KANAL searches for "reasonable" references of the detected piece of code or data. If, for example, some kind of crypto substitution table is detected, KANAL attempts to find the address where the table is referenced from. The references are displayed as subitems of the detected crypto item (so, you have to expand the item to see it). If no reference of the detected signature is found (e.g. because it's not a piece of data, but rather a constant contained inside of an assembly instruction), the text "The reference is above" is displayed.

User interface:

• Using the Export button, you can save the results to a file, or copy them to clipboard. The possible output formats are:
  • List of Items - text file containing the list of detected crypto algorithms with the corresponding addresses (i.e. what you see in the results window, unexpanded items).
  • List of Items with References - text file containing the list of detected crypto algorithms with the corresponding addresses and references (i.e. what you see in the results window, expanded items).
  • IDC Script - Bookmarks - IDC script for IDA Pro; when executed, it creates a list of bookmarks corresponding to the detected results.
  • IDC Script - Comments - IDC script for IDA Pro; when executed, it sets the comments (containing detected crypto algorithms and their description) for the corresponding addresses.
  • IDC Script - Bookmarks & Comments - IDC script for IDA Pro; when executed, it sets both the bookmarks of detected results and their comments.
• When you right click on any line of the results, the corresponding address is copied into the clipboard (both for the crypto itself and for the references).
• When you select an item from the list, a simple description, corresponding to the crypto item, will be displayed in the bottom part of the window.

Limitations:

• The detection of crypto algorithms is limited to those possible to identify by a specific signature (such as fixed s-boxes, permutation tables, initialization values, etc). Simple mathematical algorithms, such as RSA, cannot be detected in a generic way. Even some of the algorithms that normally can be detected by their tables (e.g. AES) can be implemented such that the tables are not static, but rather generated dynamically during the runtime using special formulas; in such cases they probably won't be recognized by KANAL.
• Some functions (even RSA) can be detected according to their implementation in specific crypto libraries. This kind of detection, however, depends on the compiler used, its optimization settings, etc - so it won't work in all cases.
• A few of the algorithms are detected by a single DWORD - so, they are susceptible to occasional false alarms.
• Some crypto algorithms share a common initialization code - so if multiple crypto algorithms are present in the file, they may be "mixed up" sometimes. The plugin tries to filter the results somehow (to guess which algorithm it actually is, using the "shared" code), but it may not be 100% accurate, of course.

Notes:

• The processed file is just scanned for known patterns - no part of the file is executed. So, it's safe to use KANAL on malicious files.

Credits: