Loot burn rape kill has brought a similar riff to my attention.
At the beginning of it, the riff played in the heavy bit is well, exactly the same as a sample piece i released on the forum a while back.
(will not be releasing any more sample pieces on the forum from now on)
Not cool.
There are no riffs in Loot, just a bunch of chords...

... Trust me there is nothing original there, and should it happen to be similar to something you've shown, it'd be pure coincidence (cause I know I haven't heard it, for one thing) and also nothing new (since the guitarplay in Loot is simple thrashing with default harmonic scale notes...)... "Default" is the word.
Hate to burst your bubble here if I did, but... That's the way it is.