Hack The Box: Eternal Loop

extract-6969.sh

#!/bin/bash
set -e

# Solve https://app.hackthebox.eu/challenges/56
# Eternal Loop
# Can you find a way out of this loop?

# Usage: ./solve.sh

# crack last zip file
zip2john 6969.zip > hash
john hash --fork=4 -w=/usr/share/wordlists/rockyou.txt 2>/dev/null
PASSWORD=`john --show hash | grep -m1 6969.zip | cut -d: -f2`

# extract last zip file
unzip -o -P $PASSWORD 6969.zip

extract-flag.sh

#!/bin/bash
set -e

# Solve https://app.hackthebox.eu/challenges/56
# Eternal Loop
# Can you find a way out of this loop?

# Usage: ./solve.sh

DATABASE_FILENAME=DoNotTouch

HTB_TABLE=""
for TABLE_NAME in $(sqlite3 $DATABASE_FILENAME .tables)
do
        sqlite3 $DATABASE_FILENAME "SELECT * FROM $TABLE_NAME;" | grep 1>/dev/null 'HTB' && HTB_TABLE=$TABLE_NAME
done

sqlite3 $DATABASE_FILENAME "SELECT * FROM $HTB_TABLE;" | grep 'HTB' | sed -e 's/.*HTB/HTB/g'

extract-loop.sh

#!/bin/bash
set -e

# Solve https://app.hackthebox.eu/challenges/56
# Eternal Loop
# Can you find a way out of this loop?

# Usage: ./solve.sh

# extract original file
ORIGINAL_FILENAME="Eternal Loop.zip"
ORIGINAL_PASSWORD=hackthebox
unzip -o -P $ORIGINAL_PASSWORD "$ORIGINAL_FILENAME"

# extract contents
FILENAME=`unzip -l "$ORIGINAL_FILENAME" | awk '{print $4}' | grep .zip`
while :
do
        NEXT_FILENAME=`unzip -l $FILENAME | awk '{print $4}' | grep .zip`
        PASSWORD=`echo $NEXT_FILENAME | sed "s/\.zip//g"`
        unzip -o -P $PASSWORD $FILENAME
        FILENAME=$NEXT_FILENAME
done

solve.sh

#!/bin/bash

# Solve https://app.hackthebox.eu/challenges/56
# Eternal Loop
# Can you find a way out of this loop?

# Usage: ./solve.sh

echo Extracting files...
sh extract-loop.sh 1>/dev/null

echo Decrypting...
sh extract-6969.sh 1>/dev/null

echo Finding flag...
sh extract-flag.sh

echo Done