I don't know what brand it but it's not the bottom of the barrel frame. Forged drop outs and DT shifter braze ons are good signs. The components are a mish mash, the crank looks like a Suntour blaze, towards the lower end, the RD looks to be off a MTB. All this with the paint bomb paint job I'd walk away unless it was dirt cheap or free, even then it might only make me pause before walking.