[Pragyan CTF] New Avenger writeup

New_Avenger_solution.py

# Full Writeup: https://www.megabeets.net/pragyan-ctf-new-avenger

from zipfile import ZipFile
import string

passwords =[]
i = 1

while True:
    f=reversed(open("%s_image.jpg"%i).readlines())
    passw = f.next()
    try:
        passw = passw[passw.index(':- ')+3:passw.index(' \n')]
    except:
        break
    with ZipFile('image_%s.zip'%(i+1)) as zf:
        zf.extractall(pwd=passw)
    i+=1
    passwords.append(passw)

locations = []
for p in passwords:
    for c in range(26):
        if p[c] in string.uppercase:
            locations.append(c)

map_result = ''
for l in locations:
    map_result += string.lowercase[l]

print "Result:", map_result
# Result: etitgepgztgxhiwthexstgbpc
# now do ROT11("etitgepgztgxhiwthexstgbpc") to get the flag
# flag: pragyanctf{peterparkeristhespiderman}