Someone Has Your Aliyun Password: 1,974 Credentials Leaked

On June 28, 2026, HEROIC analysts detected a stealer log file on Telegram exposing 1,974 records tied to aliyun.com — the email domain used by Alibaba Cloud. The leaked dataset contains email addresses, plaintext passwords, and URLs harvested from infected devices. These credentials are fully readable and available to anyone who downloads the file from the Telegram channel where it was posted.

Why Plaintext Passwords Put Your Accounts in Immediate Jeopardy

Every password in this aliyun.com stealer log is stored without any form of encryption or hashing. This is the worst-case scenario for affected users: attackers do not need specialized tools, computing resources, or technical skill to use these credentials. They simply copy the password and log in.

The window between exposure and exploitation is dangerously narrow with plaintext credentials. Threat actors monitoring Telegram channels for fresh stealer logs can begin testing the stolen passwords against aliyun.com accounts and connected services within minutes of the file's upload. For the 1,974 users in this dataset, the clock started ticking the moment the log went live.

What Was Exposed in the Aliyun.com Dump

• Email Addresses — Alibaba Cloud email accounts that often serve as identifiers for cloud infrastructure, developer tools, and business services in the Alibaba ecosystem.
• Plaintext Passwords — Completely unencrypted login credentials that provide instant access to affected accounts with no decryption required.
• URLs — Specific web addresses and services the victims were authenticated to, revealing the full scope of platforms connected to their compromised credentials.

Why Nearly 2,000 Aliyun Credentials Amplify the Threat

Aliyun.com accounts often serve as gateways to cloud infrastructure, development environments, and business-critical services. A compromised Alibaba Cloud credential can do far more damage than a typical email account breach — it can expose entire server deployments, databases, and API keys.

Beyond the direct Alibaba ecosystem, the persistent problem of password reuse means these 1,974 credentials likely grant access to many additional platforms. Automated credential-stuffing tools will systematically test each email-password pair against hundreds of popular services, and the typical reuse rate ensures that a substantial percentage will yield successful logins on completely unrelated websites.

How Stealer Logs Silently Drain Your Saved Credentials

The credentials in this dump were not stolen through a server breach or database hack. Instead, infostealer malware running on individual devices quietly extracted them from web browsers. This malware reads the encrypted credential stores that browsers maintain, using the system's own decryption keys to retrieve every saved username and password.

Victims rarely know they are infected. The malware operates silently alongside normal system processes, periodically transmitting harvested data to remote servers. The stolen credentials are then compiled into structured log files — like this aliyun.com dataset — and distributed through underground channels, Telegram groups, and dark web marketplaces where they become publicly available to threat actors worldwide.

Check If Your Credentials Were Exposed

If you use an aliyun.com email address for any purpose, you should verify your exposure immediately. HEROIC's free breach scanner searches more than 400 billion compromised records to determine whether your email or password has appeared in this or any other known data leak. If your credentials are found, change your aliyun.com password without delay, enable multi-factor authentication, and rotate any API keys or cloud credentials that may share the same password.