There is a "Mohamed Benbattouche" who was the frontman of Polisario, a separatist group in the Moroccan Sahara.
en.wikipedia.org
Polisario Front, politico-military organization in Western Sahara seeking independence. It began as an insurgency against Spanish control and later fought against Moroccan control. The Sahrawi Arab Democratic Republic (SADR) was established by the Polisario Front as a government-in-exile.
www.britannica.com
His real name was Ibrahim Ghali, but he was using a false Algerian ID with the name "Mohamed Benbattouche":
This seems a little too esoteric for Null to appropriate as his alias... but why then would Big Bang appropriate some separatist warlord's Algerian pseudonym as his alias of choice for a FOIA request? Odd...