One Telegram Post. 5.4 Million Records. The 5.7kk Dump Had 5,456,033 Credentials.

HEROIC analysts identified a stealer log file uploaded to Telegram on January 31, 2026 that exposed 5,456,033 records. The file, distributed by an anonymous Telegram user under the label "5.7kk," contained email addresses, plaintext passwords, and endpoint URLs harvested from infected devices worldwide. The "5.7kk" filename is a numeric shorthand used by stealer log operators indicating an advertised size of approximately 5.7 million records, consistent with the confirmed 5.4 million validated entries in this dataset.

Why the 5.7kk Telegram Dump Is a Direct Threat to Account Security

Stealer log files with confirmed plaintext passwords represent the most operationally ready category of stolen credential data. There is no decryption or password cracking required. Each entry in this dataset is a working email and password combination that can be tested against live services the moment an attacker downloads the file. The endpoint URLs in the dataset remove even the guesswork about which services to target, providing a direct map from victim identity to the specific platforms where their credentials are active. At 5.4 million records, this file provides enough material for continuous automated attacks across major platforms for months after its publication.

Data Exposed in the 5.7kk Telegram Stealer Log

The following data types were confirmed in this stealer log file:

• Email Addresses (usernames for platform authentication across services)
• Plaintext Passwords (stored in clear text, no technical processing needed)
• URLs (the specific websites and services each victim was authenticated to when their device was compromised)

How Stealer Log Credentials From the 5.7kk File Are Exploited

The January 2026 publication date means this data entered criminal markets recently, making exploitation attempts likely still ongoing. Here is the typical attack sequence:

• Credential stuffing: Automated tools cycle through all 5.4 million email and password pairs against banking, e-commerce, and social media platforms, exploiting password reuse to convert breach exposure into account acces at scale.
• Account takeover: Each successful login is secured immediately by updating recovery credentials and removing the legitimate owner's ability to regain access without extended support processes.
• Identity theft: Compromised email accounts become intelligence repositories for attackers, revealing linked financial accounts, personal documents, and identity information usable for credit fraud and government benefits theft.
• Financial fraud: Endpoint URLs pointing to banking and payment services allow attackers to directly target financial accounts rather than relying on broad password reuse matching.

One Telegram Post. 5.4 Million Credentials. How Stealer Log Dumps Like 5.7kk Are Built

The 5.7kk file is a product of aggregated infostealer malware operations. Individual malware infections on consumer and corporate devices each produce a small log file containing the saved credentials from that device. Infostealer operators collect thousands of these individual device logs, run deduplication and validity checking, then package the cleaned output into numbered bulk files for distribution. The number in the filename ("5.7kk") is the operator's advertised total before final deduplication, serving as a marketing metric. These files are then uploaded to Telegram channels where subscribers download them immediately. A single upload like this reaches hundreds or thousands of criminal actors within hours, each of whom may begin credential testing independently. The January 2026 upload date makes this among the more recently published files in current criminal circulation, and victims whose credentials appear here may have had very little time to become awear that their data was compromised.

Check If Your Email Was in the 5.7kk Breach

HEROIC's free breach scanner checks your email address against more than 400 billion exposed records, including Telegram stealer log files like this one. If your credentials appeared in this dump or any other breach in our database, you will know immediately so you can change your passwords and secure your accounts before attackers gain access. Run a free breach scan at HEROIC now.