A new ISIS video, entitled "Assault of the Brave Against the Army of the Americans," shows the last moments of four Green Berets killed in Niger last year.
The founder of research firm Fusion GPS said Moscow used the document as a pretext for arrests and killings.
More than 500 American troops are now stationed in the east African country.
Four U.S. Green Berets were killed in the October 4 attack blamed on ISIS-affiliated militants.
Amad al-Faqi al-Mahdi was jailed for nine years in 2016 after pleading guilty to war crimes.
The group kidnapped the Swedish national from Timbuktu in 2011.
The Group to Support Islam and Muslims bragged about killing Westerners and attacking "a site of debauchery"
France wants the Security Council to back an African force aimed at fighting Al-Qaeda and ISIS-linked groups in the Sahel.
The EU is investing $56 million in a counter-terrorism force in a region awash with militant groups.
Some of the groups were involved in the 2012 northern Mali uprising.
Islamic State militant group accepts allegiance of a militia based in a region high in instability and low in security.
The attacks on Ouagadougou are part of a wider trend of militancy in one of the world's poorest regions.
The pope said that religion "must never be used to justify hatred and violence."
At least 27 are reportedly dead in the attack on a Western target in the West African country.