Nazi flags

[Lonsofore]

Hi, Killtube. Today I wanna ask you about nazi flags, like on Moscow (mp_downtown). Example:


So, I tried to find it like a texture with cg_drawmaterial. No result - it showed to me a texture below.
I also tried to find it like a model (with decompilling only models from the map) - no result again, it's not a model...
I can't decompile a full version of Moscow - Radiant gave me an error. I tried to decompile gob wtf (I saw something like there) - got aa_default texture there (maybe they did it by another way, idk).

So, can somebody tell me, what is it? How to did the same flag?