Bbanner of Muslim Jihad — The Shahada written in white on a black background. This is the reverse of File:Flag of Taliban.svg, the Shahada written in black on a white background, the flag used by the Taliban in the period of 1997-2001. According to comments at FOTW, some Islamist websites began to display the black-on-white flag alongside the white-on-black one: "I have found in several "hard Islamic" websites the symbol of a white Taliban flag crossed with its inverted colour version (probably identified as Al-Qaeda flag): black background with shahada in white. I do not know if this flag is recognised by Al-Qaeda; but it is normally flying in pro-Al-Qaeda sites." (Santiago Tazon, 17 November 2001) According to a comment from 2003: "This black flag with the Shahada in white on it is the RAYAH, the flag of the Jihad in Islam. Not the banner of single group claiming for Jihad but the banner of the Jihad.
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=1189517