Mir Islam ('Josh the God') and Eric Taylor ('Cosmo the God') of UGNazi were arrested on Jas a result of Operation Card Shop, a Federal Bureau of Investigation investigation into identity theft and credit card fraud. In January 2021, Parler CEO John Matze alleged to Fox News that UGNazi was actively working to facilitate targeted harassment of himself and his family following the temporary take-down of Parler, a far-right social network implicated in the 2021 storming of the United States Capitol. on December 19, 2012, in opposition to the Westboro Baptist Church's planned protest following the Sandy Hook Elementary School shootings. UGNazi hacked into the Twitter accounts of Shirley Phelps-Roper on December 17, 2012, and Fred Phelps Jr. Sam Biddle of Gizmodo disputed the veracity of the claim. On June 21, 2012, UGNazi claimed they took popular social media website Twitter down for two hours via a denial of service attack. On June 8, 2012, UGNazi hacked the website of Wawa Inc and defaced their webpage. In June of 2012, the leader of UGNazi stole the information of over 411,000 credit cards and compromised over 47 companies and government organizations estimating to be around $205 million. UGNazi attacked the non-profit organization Wounded Warrior Project and released the Project's database on June 6, 2012. On June 4, 2012, UGNazi targeted 4chan with a DNS hijacking attack through a vulnerability in Cloudflare's use of Google's two-factor authentication system, redirecting visitors to UGNazi's Twitter account. The leaked database contained about 500,000 stored credit card numbers. They gained root access to WHMCS's web server and leaked WHMCS's SQL database, website files, and cPanel configuration. A member of the group called WHMCS' hosting provider, impersonating a senior employee. UGNazi performed a social engineering attack on web host billing software developer WHMCS. They also leaked the account details of about 16 users, consisting of usernames and password hashes, including those of the website's administrator. In May 2012, after compromising a database belonging to the Washington Military Department, UGNazi leaked sensitive DNS information used by the US state of Washington.

On April 24, 2012, UGNazi performed distributed denial-of-service attacks on the websites of the Central Intelligence Agency and the Department of Justice in protest of the Cyber Intelligence Sharing and Protection Act. In January 2012, UGNazi defaced the website of Ultimate Fighting Championship in response to the UFC's support of the Stop Online Piracy Act.

In December 2018, two members of UGNazi were arrested in connection with a murder in Manila. Two members of UGNazi were arrested in June 2012 one was incarcerated. The group conducted a series of cyberattacks, including social engineering, data breach, and denial-of-service attacks, on the websites of various organizations in 2012.

UGNazi ( Underground Nazi Hacktivist Group) is a hacker group.

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