ohh yeah the upx detection for versions older than v1.0 is now fixed.
yes itīs right i am looking for 'UPX!' in the header but also for some signature bytes and a special UPX byte pattern.
(i need to update my code to support the very early UPX version)
i canīt just check for UPX1,UPX2 coz it could be TeLock (nasty!).
but v4.0 detects TeLock now really proper
iīm downloading the cracked B&W.exe to check it out.