1 - Zombie Talk

Zombies got communication-problems because of their heterogeneity, so they defined a standard for their communication. We need to know how to decrypt their messages in order to successfully defeat them. Luckily, a friend of mine found one of those encrypted messages:

0x1be15dc
77676058612
03062372
676
0x9542
0x2546c9ec
02614610
0x3b3154e5a0a923ff

Hint: uppercase seems legit.