Several hacker groups associated with Russia have claimed their support for Hamas' attack on Israel, cyberattacks on the country's government websites, and the hacking of an application used for alerting the population to air raid sirens. This information was reported by Bloomberg.

The hacker group Killnet, believed to consist of Russians, has announced its intention to attack all of Israel's government systems. Killnet has accused Israel of bloodshed, supporting Ukraine and NATO. The group claimed responsibility for the disruption of the Israeli government's website and the website of the Shin Bet security agency on October 8 as a result of their attacks.

At the same time, the hacker group Anonymous Sudan, also linked by cybersecurity experts to Russia, declared its support for "Palestinian resistance" and took responsibility for attacks on the Jerusalem Post newspaper's website on the morning of October 9. The newspaper's editorial team posted on Twitter that the website "experienced several cyberattacks," but it was restored.

The cybersecurity firm Group IB has reported that the hacker group AnonGhost compromised a mobile app that alerts Israelis to missile launches. The hackers inserted notifications with phrases like "death to Israel" and "nuclear bomb incoming" alongside a swastika symbol. In a Telegram statement, AnonGhost declared that it "will never remain silent."

Pro-Israeli groups are also conducting attacks on websites of Palestinian organizations. One of the groups claimed to have blocked the websites of the Palestinian National Bank and Hamas on October 8, and both were still inaccessible on October 9.