London, May 7 (IANS/DPA) The UK Ministry of Defence (MoD) has been the target of a large-scale data breach, the Ministry said.
Sky News reported that China was behind the cyber attack.
A third-party payroll system has been hacked, potentially compromising the bank details of all serving armed forces personnel and some veterans. A very small number of addresses may also have been accessed.
The department took immediate action when it discovered the breach, taking the external network -- operated by a contractor -- offline.
It is understood that initial investigations have found no evidence that data has been removed.
However, affected Armed personnel will be alerted as a precaution and provided with specialist advice. They will be able to use a personal data protection service to check whether their information is being used or an attempt is being made to use it.
All salaries were paid at the last payday, with no issues expected at the next one at the end of this month, although there may be a slight delay in the payment of expenses in a small number of cases.
The UK government will inform lawmakers of the breach when Parliament returns on Tuesday, with Defence Secretary Grant Shapps expected to make a statement on Tuesday noon in the House of Commons.
The Ministers will blame hostile and malign actors but will not name the country behind the hacking.
The MoD has been working at a speed to uncover the scale of the attack since it was discovered several days ago.
The revelation comes after the UK and the US in March accused China of a global campaign of "malicious" cyber attacks in an unprecedented joint operation to reveal Beijing's espionage.
Britain blamed Beijing for targeting the Electoral Commission watchdog in 2021 and for being behind a campaign of online "reconnaissance" aimed at the email accounts of MPs and peers.
Labour Party's shadow Defence Secretary John Healey said: "So many serious questions for the Defence Secretary on this, especially from Armed Forces personnel whose details were targeted."
"Any such hostile action is utterly unacceptable. Parliament will expect a full Commons statement tomorrow," Healey added.
In response to the Beijing-linked hacks on the Electoral Commission and 43 individuals, a front company, Wuhan Xiaoruizhi Science and Technology Company, and two people linked to the APT31 hacking group were sanctioned.
However, some of the members of Parliament targeted by the Chinese state said the response did not go far enough, urging the UK government to toughen its stance on China by calling it a "threat" to national security rather than an "epoch-defining challenge".
Conservative former leader Sir Iain Duncan Smith repeated those calls, telling Sky News: "This is yet another example of why the UK government must admit that China poses a systemic threat to the UK and change the integrated review to reflect that."
"No more pretence, it is a malign actor, supporting Russia with money and military equipment, working with Iran and North Korea in a new axis of totalitarian states," he added.
London's Metropolitan Police said it is not involved in any investigation at this stage.
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