The hack happened a few days ago and ever since yourkan has been leaking its data to media resources before posting it all online for the world to see. The leaked data only contains user account credentials such as emails, user names and passwords which are encrypted.
The attack has also left the site defaced and now offline as well as 2 other sub domains that were defaced. The leaked accounts total 657. when the attack first happened the leak was published with the hacked site but since has been moved to pastebin.
Yourikan also sent us this which attempts to explain the reason behind this attack,
NRI (Niroo Research Institute) of Iran, started its activities in
1997.It has played a leading role in developing new technologies for
Electric Power Industry ever since. NRI is the major research
organization affiliated to the Ministry of Energy of Iran. NRI is
performing the dual task of meeting the present and future demands of
electric power industry, while making a better use of available
resources, preserving the environmental and maintenance costs as low
NRI has invested considerably in providing adequate conditions to
achieve its objectives. The main building and laboratories of this
institute are located in the north-west of Tehran, in a block of land
with about 140,000sqm area. Research activities are carried out in 6
various research centers, consisting of 18 technical research
departments, using the facilities of 9 advanced laboratories.
SITE IS DOWN!