I think this should be:
```
      when 7601
        if branch == 18
          return Exploit::CheckCode::Vulnerable if revision < 18176
        else
          return Exploit::CheckCode::Vulnerable if revision < 22348
        end
```

It was patched the same time as https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/ppr_flatten_rec.rb (and shares MS13-053)