Considered to be an entry level capture the flag (CTF) challenge, Blue is a fun little room that gives you a taste of what is involved in attacking and escalating privileges on a vulnerable machine, using a real world example of a common exploit.
Tag: hash
0x3: Password Hash Cracking
'Crack the Hash' is a fun little challenge that demonstrates the fundamentals of cryptographic hash cracking and the importance of a long password, hashed with a strong algorithm.