Photographs taken in north-west Iraq's Nineveh province show the men being read their charges and sentence while masked gunmen stand guard.
Forced to kneel with their heads bowed, an executioner then stands over them before striking at their necks with a sword.
Public beheadings, stonings and other forms of executions have become commonplace throughout ISIS' self-declared caliphate.
Stretching through swathes of Iraq and Syria, the militants are attempting to enact a strict form of their understanding of Sharia law, where crimes are commonly punished by death or physical mutilation.
In recent months, men accused of being gay have been thrown from rooftops, adulterers stoned to death, and thieves' hands chopped off.