downloaded challenges

didnt know they would publish everything

DownUnderCTF 2023/beginner/confusing/ape.py

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+import sys
+import angr
+import claripy
+import time
+
+# compiled on ubuntu 18.04 system:
+# https://github.com/b01lers/b01lers-ctf-2020/tree/master/rev/100_little_engine
+success = 0x0010133c
+fail = 0x00101343
+
+
+def main(argv):
+    path_to_binary = argv[1]  # :string
+    project = angr.Project(path_to_binary)
+
+    # Start in main()
+    initial_state = project.factory.entry_state()
+    # Start simulation
+    simulation = project.factory.simgr(initial_state)
+
+    simulation.explore(find=success, avoid=fail)
+
+    # If found a way to reach the address
+    if simulation.found:
+        solution_state = simulation.found[0]
+
+        # Print the string that Angr wrote to stdin to follow solution_state
+        print(solution_state.posix.dumps(sys.stdin.fileno()))
+    else:
+        raise Exception('Could not find the solution')
+
+
+if __name__ == '__main__':
+    main(sys.argv)