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Incident

Internal Revenue Service

Incident posture

Attack window
Jan 2023
Location
United States of America
Status
Historical
CIA posture
Available to members
Updated
2026-01-30 18:05

Linked entities

Victim
Internal Revenue Service
Threat actors
1 actor
Sources
0 sources

Timeline

Occurred
Jan 2023
Discovered
Pending
Disclosed
Pending
Resolved
Pending

Summary

Anonymous Russia and Infinity Hackers BY claim to have conducted a hack and leak operation against US federal tax authorities. The leak allegedly contains 198 million lines of personal information.

Motives

Detailed motive labels are available to members.

0 motives

TTPs

Detailed technique labels are available to members.

0 techniques

Description

IRS systems were compromised, including sensitive personal and financial information of taxpayers.

Anonymous Russia claimed responsibility for the hack in a message on their Telegram channel.

The group stated that they had gained access to IRS systems through a vulnerability in an unnamed third-party vendor's software.

IRS officials confirmed that some data was accessed, but did not provide further details.

No ransom demand or other demands were made by the attackers.

Sources

Sources available to members: 0 sources.

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