cryptoeasy
Кракозябры (Krakozyabry)
hackerlab
Task: Decode garbled Russian text (krakozyabry/mojibake) from a file with multiple encoding chains. Solution: Reverse encoding chains (UTF-8 -> KOI8-R -> CP1251, UTF-8 -> CP1251, UTF-8 -> GBK) to recover original messages revealing the flag is the most popular OS name.
$ ls tags/ techniques/
character_encodingencoding_chainmojibakekrakozyabrykoi8rcp1251cp866gbkutf8russian_encodingchinese_encodingencoding_mismatch
Character encoding chain analysisEncoding mismatch reconstructionMulti-encoding reversal
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