From here you can browse all malware analysis in the database by hash.

The output is sub-categorized by the first three sets of Octets. To browse to your hash, you can either search for it, or click through the first 3 sets of bytes in the hash of the malware to locate the matching output if it exists.

Browse 28 b1 c8
28b1c8a2aac1a4989a9ed27f735997f4b3b71dfc 28b1c8c0f983aceab31e41cb0d42dc997a807db2