simple_case_obfuscator.sh

simple_case_obfuscator.sh

# simple case obfuscator
# author: @egre55
# usage: ./simple_case_obfuscator.sh Invoke-PowerShellTcp.ps1

if [ "$1" == "" ]; then
  printf "\nusage: ./simple_case_obfuscator.sh Invoke-PowerShellTcp.ps1\n\n"
  exit 0
fi

file=$1
limit=$(wc $file | awk -F" " '{print $3}')
max=$(($limit / 2))

cp "$1" "$1.bak"
printf "[+] created backup file $1.bak\n[+] case-encoding $1\n"

sed -i "/^$/d" $file
sed -i -E ':a;N;$!ba;s/\n/¬/g' $file

for i in $(seq 1 $max)
do
  position=$(shuf -i 0-$limit -n 1)
  sed -i "s/./\U&/$position" $file 2>/dev/null
done

for i in $(seq 1 $max)
do
  position=$(shuf -i 0-$limit -n 1)
  sed -i "s/./\L&/$position" $file 2>/dev/null
done

sed -i "s/¬/\n/g" $file

printf "[+] done\n"