Whistleblower Lawsuit Accuses IBM of Concealing APT10 Breaches
A newly unsealed False Claims Act lawsuit alleges that IBM concealed multiple intrusions by foreign government-linked hackers, including activity tied to Chinese state-linked group APT10, after its core network was reportedly breached between 2013 and 2016. Former IBM vice president of threat intelligence William Barlow claims IBM’s internal investigation identified more than 56,000 potential indicators of compromise, with nearly 400 accounts and almost 200 systems across 18 countries potentially affected, and that the company failed to notify customers, authorities, and U.S. government agencies despite its role as a major federal cybersecurity vendor.
The complaint also alleges that IBM and AT&T operated outdated, poorly segmented infrastructure with insufficient logging and monitoring, leaving investigators unable to determine the full scope, timing, or impact of the intrusions. Barlow said he repeatedly warned executives from 2017 to 2019 about missing logs, weak detection, and active exploitation, but was told to reduce or redact his findings; he further alleged undisclosed breaches at IBM subsidiaries Trusteer and Truven. IBM said the case was originally filed in 2020, that the U.S. Department of Justice declined to intervene, and that the company believes it acted lawfully, while AT&T did not publicly comment.

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How this story unfolded
6 events from the most recent confirmed update back to the earliest known activity.
IBM publicly denied wrongdoing after the allegations surfaced
In response to the newly public complaint, IBM said the case was years old, noted that the Justice Department declined to intervene, and stated that it believes it acted within the law.
Barlow lawsuit was unsealed and became public this week
The False Claims Act lawsuit accusing IBM and related infrastructure of concealing nation-state intrusions was unsealed this week, making the allegations public and leaving the case pending in Manhattan federal court.
U.S. government declined to intervene in Barlow's lawsuit
After reviewing the sealed False Claims Act case, the U.S. Department of Justice declined to intervene, allowing the matter to proceed toward public disclosure and continued litigation.
Barlow says he repeatedly warned IBM executives about security failures
From 2017 to 2019, former IBM vice president of threat intelligence William Barlow allegedly warned executives about missing logs, poor segmentation, inadequate monitoring, and active exploitation in IBM cloud environments tied to AT&T-managed infrastructure. He claims he was told to reduce or redact his findings.
APT10 allegedly breached IBM's core network over several years
According to the unsealed lawsuit, IBM internally concluded that Chinese state-linked APT10 breached its core network between 2013 and 2016, with more than 56,000 potential indicators of compromise affecting hundreds of accounts and systems across multiple countries.
William Barlow filed False Claims Act lawsuit against IBM in 2020
The complaint alleging IBM concealed multiple foreign government-linked breaches and failed to notify authorities was filed under seal in 2020 by former executive William Barlow.
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Sources
3 references tracked. Mallory keeps watching after this page renders.
Former IBM executive sues, alleging cover-up of foreign government hacks | brief | SC Media
scworld.com
Open sourceFormer cyber executive turned whistleblower accuses IBM of covering up several data breaches | TechCrunch
techcrunch.com
Open sourceEx-Threat Intel Exec Accuses IBM and AT&T of Hiding Hacks
govinfosecurity.com
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