

Researchers unmasked a prolific SMS scammer and then a new one emerged in its wake and Sam Altman addresses ‘bumpy’ GPT-5 rollout
Aug 11, 2025
In today's talk, researchers unveil the true identity of a notorious SMS scammer known as Darcula, responsible for widespread scams targeting unsuspecting phone users. The conversation shifts to the rollout of OpenAI’s GPT-5, where CEO Sam Altman, during a Reddit Q&A, faces queries about its performance and a humorous mishap during its introduction. The challenges of navigating tech advancements while dealing with real-world scams create a fascinating discussion.
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Scammers Harvest Massive Card Data
- Over seven months Magic Cat stole at least 884,000 card details and caused heavy losses.
- Harrison Sand warns Magic Mouse now steals about 650,000 cards each month.
Magic Cat Creator Revealed
- Mnemonic's investigation exposed Magic Cat's creator as a 24-year-old, Yucheng Si.
- OPSEC mistakes linked the online handle Darcula to the real person.
Inside Operation Photos Revealed
- Mnemonic found Telegram photos showing payment terminals and racks of phones used to automate messages.
- The imagery illustrated how stolen cards were loaded into mobile wallets for fraud.