... as if it ever really vanished (nope, at least, not completely, as thousands of site owners have never cleaned up their sites, leaving the original infection and/or backdoors in place - woops!).
Read the write ups by FireEye and Unmkask Parasites;
Gumblar, not Gumby!
Revenge of the Gumblar
WordPress users: UPDATE! UPDATE! UPDATE!
Martuz.cn (aka Gumblar) and WordPress does not a good mix make ....
Live.com poisoning - Gumblar/Martuz isn't the only infection around .....
gumblar.cn switches to martuz.cn (188.8.131.52 - netname: NET-VENTREX)