ASOS (LSE:ASC) shares fell on Tuesday after customers received a notification through the online fashion retailer’s app containing a claim that hackers had accessed company data.
The shares dropped as much as 13.2% before reducing losses to trade around 9% lower.
ASOS had not commented on the notification at the time covered by the supplied material. It therefore remains unconfirmed whether the company’s systems were breached or whether any customer data was accessed or compromised.
Notification Claims Access to Snowflake Instance
The message, which was addressed to ASOS’s data protection officer and IT employees, stated: “We have fully compromised the Snowflake instance. Engage with us, or we will leak it.”
The claim has not been independently verified in the supplied material.
The notification included a link to a Telegram channel identified as the Xuanye group gateway. Cybersecurity company Sophos said it had not previously encountered the group and that it did not appear on the Telegram channels or forums monitored by the company.
Snowflake is a cloud platform used for storing and analysing data. According to the supplied material, it hosts Simon AI, which combines behavioural, transactional and demographic customer information into individual profiles.
Customers Report ASOS Website Issues
Nearly 500 customers reported problems with the ASOS website shortly before 10 a.m., according to Downdetector.
The website and app appeared to operate normally until 9:41 a.m., and the supplied material does not establish whether the reported technical problems were connected to the notification or the alleged security incident.
The ASOS website and app subsequently continued to appear operational, with no indication of the alleged incident beyond the notification.
No confirmation that customer information was accessed, obtained or disclosed is provided in the supplied material.

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