The message of the group, "Adlat Ali" (Adlat al-Imam Ali), which included photos and videos, was sent to the Persian-speaking media, after the surveillance cameras were hacked inside the notorious Evin prison in Iran.
The cyber group says that the messages relate to hacking the surveillance camera system of Evin prison with the aim of "exposing" what is going on there.
In some videos, the control room can be seen in the surveillance cameras, and different sections of the prison are shown on the screens.
The video shows images of the cameras being gradually cut off, and a message appears on the screens of the room: "Evin is a stain on the black turban and white beard of Ibrahim Raisi - the nationwide protest for the release of political prisoners."
This letter refers to the Iranian president, Ebrahim Raisi, who is accused of involvement in the mass executions and human rights violations in the summer of 1988.
In this video, the officials of the CCTV control room appear, who were surprised by a defect in the screens, and by displaying this message, they are filming the protest message on the hacked screens of their mobile phones.
In another video, the "Adalat Ali" group says it obtained it by hacking the surveillance system in Evin Prison. A person can be seen fainting, apparently in a prison yard.
After the prisoner, who was wearing a medical mask, fell to the ground, several persons who appeared to be prison guards gathered around him, grabbed him by the hands, and dragged him to the ground.
In the pictures taken from different cameras, this person can be seen being dragged on the ground for a while, and being forcibly lifted from the stairs.
The message sent with the videos said that in addition to the prison control room, the intruders also obtained photos and videos from inside "prisoners' wards and rooms, the files of political prisoners, and the classified documents of Evin Prison."