Run exiftool 186.rar to look for anomalies in the metadata. Flag Retrieval Once the archive is open:
Open it with a hex editor; RAR4 starts with 52 61 72 21 1A 07 00 , while RAR5 starts with 52 61 72 21 1A 07 01 00 . 186.rar
Depending on the "twist" of this specific challenge, use one of these common methods: 1. Brute Forcing (Password Protected) Run exiftool 186
Run strings 186.rar | grep -i "flag" to see if the flag is visible in plaintext. 186.rar
Run file 186.rar to confirm it is actually a RAR file.