T-mobile transferred a phone number from an employee of a large company



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Date20.12.2023
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SIM-Swapping
SimJacker

SIM-Swapping Attack

  • T-Mobile transferred a phone number from an employee of a large company.

  • SIM swapping allows threat actors to bypass the security of SMS password resets and verification.

  • There’s been over 100 incidents in 2022.

  • https://krebsonsecurity.com/2023/08/kroll-employee-sim-swapped-for-crypto-investor-data/

  • https://en.wikipedia.org/wiki/SIM_swap_scam

Steps:


  1. They gather details about the individual from social media or gathered through a phishing site.

  2. They call the customer and use these details to appear authentic, and they try to convince the user to approve a SIM swap.

  3. If accepted, the threat actor will receive all SMS and voice calls; They can now bypass 2-Factor Authentication.



Jack Dorsey


In 2019, the CEO of Twitter was hacked via SIM-swapping.

FBI Complaints


In 2021, the FBI received 1,600 complaints of SIM-swapping.
Simjacker
There was another SIM card attack that ran commands on the phone with a specially formatted SMS message. It ran commands to first gather information, then send that information to threat actors. It was discovered in 2019. https://en.wikipedia.org/wiki/Simjacker

  • S@T browser requires no authentication

  • Several hundred attacks per week in Mexico (primary targets)

  • A surveillance company

  • Around 10-20k of these messages in a year.

  • Over 100m globally could be affected.

Steps:

  1. Binary “Attack message” sent to user. (Instructs SIM card to get location information)

  2. SMS message is sent to scammer receipient phone number, with location info.

Could also lock a user out of their account with S@T commands.


QAKBOT
https://www.bleepingcomputer.com/news/security/qakbot-botnet-dismantled-after-infecting-over-700-000-computers/




  • Compromised 700k computers

  • Found a payments.txt file with details of ransomware victims.

  • FBI deployed an uninstaller by redirecting Qakbot traffic.

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