Inside the Echo Cloud Logs: How Stealer Malware Harvested 21,131 Passwords on Telegram

HEROIC analysts identified a stealer log file uploaded to Telegram on March 16, 2026, under the name Echo Cloud Logs that exposed 21,131 records. The dataset contained email addresses, plaintext passwords, and URLs harvested from devices compromised through information-stealing malware. The date-stamped name (16-03-2026) indicates this was a timestamped release, a common practice among stealer log operators who distribute logs in dated batches to signal freshness and attract followers in criminal channels. With over 21,000 records, this was a substantial single-day release.

Why 21,131 Freshly Harvested Passwords Are Dangerous

The Echo Cloud Logs were stamped with a specific collection date, which means the credentials in this dataset were captured recently and are highly likely to still be active. Attackers prize fresh logs because passwords change over time, and a credential that was valid in March 2026 has not had time to age out of active use. An attacker who downloads this file can immediately begin testing each email-and-password pair against cloud platforms, email providers, and financial services, knowing that the vast majority of these credentials are still in use on the accounts they were stolen from.

What Was Exposed in the Echo Cloud Logs Leak

• Email Addresses
• Plaintext Passwords
• URLs (the specific services where credentials were captured by the malware)

Why This Matters for Credential Stuffing, Account Takeover, and Identity Theft

Fresh stealer log datasets like Echo Cloud Logs are immediately weaponized in credential stuffing attacks, where automated tools cycle through stolen email-and-password pairs against popular login portals. A single successful hit can give an attacker access to an email inbox, which they can then use to reset passwords on banking, shopping, and social media accounts. Identity theft follows quickly when an attacker controls both an email address and a password, because those two pieces of information are sufficient to impersonate someone across a wide range of platforms that rely on email-based verification.

Inside the Echo Cloud Logs: How Stealer Malware Harvested These 21,131 Passwords

Stealer log malware works by installing itself silently on a victim's device, typically through a phishing email, a trojanized software download, or a malicious browser extension. Once active, it operates in the background and extracts saved passwords from Chrome, Firefox, Edge, and other browsers. It also captures credentials as the user types them into login forms and collects session cookies that can be replayed to bypass two-factor authentication. All of this is packaged into a structured log file and transmitted to the attacker's server. Operators like the one behind Echo Cloud Logs then organize their harvested data by collection date and distribute the logs through Telegram, either for sale or for free, as a way to build credibility and attract followers in criminal communities. The cloud-focused branding suggests this operator may sort or prioritize credentials from cloud platform URLs.

Check If Your Accounts Appear in the Echo Cloud Logs

If you use any cloud-based services and your device may have been compromised at any point before March 2026, your credentials could be among the 21,131 records in this dataset. HEROIC's free breach scanner searches more than 400 billion records, including dated stealer log releases distributed through Telegram channels, to tell you whether your email address has appeared in known exposed datasets. Run a free search now to find out whether the Echo Cloud Logs contain your information before an attacker acts on it.