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Today

Claimed AT&T hack of 70M customer records; carrier denies...

Ben Lovejoy

- Aug. 20th 2021 7:10 am PT

@benlovejoy

[Claimed-ATT-hack-of-70M-customer-records]
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There has been a claimed AT&T hack of personal data from 70 million
customers, less than a week after a confirmed hack of tens of
millions of T-Mobile customer records. In both cases, the data
includes social security numbers.

Update: The carrier denied in stronger terms that it was hacked.

[INS::INS]

Restore Privacy broke the news.

    A well-known threat actor is selling private data that was
    allegedly collected from 70 million AT&T customers. We analyzed
    the data and found it to include social security numbers, dates
    of birth, and other private information. The hacker is asking $1
    million for the entire database (direct sell) and has provided
    RestorePrivacy with exclusive information for this report.

    In the original post that we discovered on a hacker forum, the
    user posted a small sample of the data. We examined the sample
    and it appears to be authentic based on available public records.
    Additionally, the user who posted it has a history of major data
    breaches and exploits. 

    While we cannot yet confirm the data is from AT&T customers,
    everything we examined appears to be valid. Here is the data that
    is available in this leak:

  * 
        Name

  * 
        Phone number

  * 
        Physical address

  * 
        Email address

  * 
        Social security number

  * 
        Date of birth

Even more worryingly, the hacker is working on decrypting data that
he believes comprises user accounts' PINs.

The site's Sven Taylor tells me that the sample records he reviewed
are too few to say for certain that the source was AT&T, but the
hacker concerned has been proven correct about "many major leaks and
breaches," making him a credible source.

AT&T has issued a single-sentence statement that falls well short of
a categorical denial:

    Based on our investigation today, the information that appeared
    in an internet chat room does not appear to have come from our
    systems.

Update the Carrier included a more complete rebuttal:

    "Based on our investigation yesterday, the information that
    appeared in an internet chat room does not appear to have come
    from our systems."

    So there was no breach of AT&T?

    Based on our investigation, no, we don't believe this was a
    breach of AT&T systems.

    Is this AT&T customer data? Where did it come from?

    Given this information did not come from us, we can't speculate
    on where it came from or whether it is valid.

The hacker has said he is willing to reach "an agreement" with AT&T
to remove the data from sale.

FTC: We use income earning auto affiliate links. More.

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About the Author

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Ben Lovejoy

@benlovejoy

Ben Lovejoy is a British technology writer and EU Editor for 9to5Mac.
He's known for his op-eds and diary pieces, exploring his experience
of Apple products over time, for a more rounded review. He also
writes fiction, with two technothriller novels, a couple of SF shorts
and a rom-com!

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