The HellCloud 137 Leak Contains Nearly 1,000 Stolen Login Credentials From Real Devices

What HEROIC Analysts Found in the HellCloud 137 Stealer Log

In August 2023, a Telegram user uploaded a stealer log file identified as HellCloud 137, exposing 994 records harvested from compromised devices. HEROIC analysts identified and indexed this dataset after it appeared in a public Telegram channel. The leaked data includes email adresses, plaintext passwords, and URLs, all captured directly from infected machines by infostealer malware before being packaged and distributed online.

HellCloud 137 is part of a numbered series, indicating a systematic operation where credentials are collected in batches and released in sequence. The 137 designation suggests this is one installment in a much larger ongoing campaign.

Why Even a Small Stealer Log Carries Real Danger

Nearly 1,000 stolen credentials may sound modest compared to large-scale database breaches, but stealer log data is qualitatively different. These are not hashed or obfuscated records that require processing before use. They are ready-to-deploy plaintext passwords paired with email addresses, captured from real devices during active use.

The URLs included in the dataset tell attackers exactly where each victim was logged in at the time of infection. An attacker does not need to guess which platforms to target. The log tells them directly, making every credential in this file immediately actionable against email accounts, banking portals, social media, and cloud storage services.

What Was Exposed in the HellCloud 137 Leak

• Email Addresses
• Plaintext Passwords
• URLs (active login services at time of infection)

Why HellCloud 137 Is Part of a Bigger Credential Threat

The numbered naming convention of HellCloud 137 is significant. It implies that batches 1 through 136, and likely many beyond 137, exist as part of the same campaign. Collectively, these datasets may represent tens of thousands of stolen credentials from the same operation.

Each batch is shared on Telegram and likely archived on dark web forums, where they accumulate into larger combolists. These combolists are then used in credential stuffing attacks, where automated tools test millions of stolen login pairs across popular websites simultaneously. Any victim whose password appears in HellCloud 137 and who reuses that password elsewhere faces account takeover, identity theft, and potential financial fraud.

How the HellCloud Stealer Log Operation Works

HellCloud is a name associated with a Telegram-based infostealer distribution channel, where operators collect raw credential output from malware-infected devices and bundle it into numbered batches for free or paid distribution. The malware itself typically spreads through phishing emails, fake software downloads, cracked applications, or malicious browser extensions.

Once running on a victim's machine, the infostealer silently records saved browser passwords, session cookies, autofill data, and browsing URLs. This raw output is then staged, often in cloud storage, and packaged under the HellCloud branding before being posted to Telegram. The victim has no awarenes of the compromise until they notice unusual account activity or recieve a security alert from one of their services.

The free distribution model means this data has been downloaded and tested by many actors since August 2023, not just the original uploader.

Check If Your Email Appeared in the HellCloud 137 Breach

If you were using the same email and password combination in August 2023 and have not since updated your credentials, there is a real possibility your data appears in this dataset or a related HellCloud batch. HEROIC's free breach scanner searches more than 400 billion exposed records and can tell you exactly where your information has appeared on the dark web.

Use the scanner at the top of this page to check your exposure. If your email comes up in the results, change the compromised password immediately, activate two-factor authentication on all important accounts, and review your recent account activity for unauthorized access. Small datasets can cause outsized harm when the data inside them is this actionable.