Most likely just some husk material that didn't get processed out when they made the DME. To be on the safe side, if you have any DME left from that bag, sift through it and make sure it doesn't have weevils (very small insects about the size of a pin head or even smaller). If "A" then carry on, if "B".....your call.
Whiskey's too rough, champagne costs too much, vodka puts my mouth in gear
This little refrain should help me explain as a matter of fact I like beer - Tom T Hall