Hackers force shutdown of major U.S. pipeline

The East Coast faced a major cyber attack on its national infrastructure, notably affecting the Colonial Pipeline, which supplies fuel to several states and airports. The pipeline was shut down due to a ransomware attack by the hacker group Dark Side, leading to fuel shortages and panic buying in the Southeast. States of emergency were declared in Florida and Virginia. The attack highlights the growing threat of cyber attacks on critical infrastructure, with past incidents affecting city governments and hospitals.

Who is identified as the hacker group behind the attack on Colonial Pipeline?

What types of organizations have been affected by similar cyber attacks as mentioned in the text?