reversePromedium

Smart enough?

ringzer0ctf

Task: a .NET Framework crackme packed with SmartAssembly (entire string table is encrypted and only the FLAG is printed on correct input). Solution: disassemble to IL, locate the SmartAssembly resource decoder, then reimplement its DES-CBC + chunked-DEFLATE + base64 string-table chain in Python to recover the accepted password and the flag string.

des dotnet pe32 crackme deflate string_obfuscation smartassembly il

des_cbc_decryptiondotnet_il_analysissmartassembly_resource_decodechunked_deflate_inflationsmartassembly_string_table_recovery

$ ls tags/ techniques/

des dotnet pe32 crackme deflate string_obfuscation smartassembly il

des_cbc_decryptiondotnet_il_analysissmartassembly_resource_decodechunked_deflate_inflationsmartassembly_string_table_recovery

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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