 While there is a lot of overlap between HelloXD and Babuk, there are some small but crucial differences to take note of between Babuk and the two different variants.  HelloXD version 1 is the least modified, utilizing Curve25519-Donna and a modified HC-128 algorithm to encrypt file data, while also containing the same CRC hashing routine incorporating the string dong, possibly referencing Chuong Dong, who had previously analyzed and reported on the first version of Babuk (Figure 8).