The latest variant was found by Symantec in mid-January which looks specifically for Intel architecture, along with other embedded devise like PPC, MIPS, and MIPSEL.
Since cryptocoins like Mincoin and Dogecoin use the scrypt algorithm, they can still be successfully mined on home PCs. Bitcoin difficulty requires custom ASIC chips.
The vulnerability was exposed through the backdoors of certain router types, which typically do not have the rigorous safety requirements of PC operating systems. The importance of up-to-date firmware cannot be stressed enough.
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