SOS Limited (SOS) jumped 24% in premarket trading, reversing a 21% drop on Friday after the company called Hindenburg Research allegations "distorted, misleading and unsubstantiated."SOS also claims that some social media accounts of some company board members have been impersonated or disabled for short periods of time, the company said in a statement.SOS said its's preparing a more detailed response to the "false innuendo and lies" that are being spread.Recall Feb. 25, SOS announces gross proceeds of $96.7M from exercise of warrants.