The AltairSupport Private Pack Put 19,011 Stolen Logins Online

HEROIC analysts identified a stealer log upload on Telegram dated August 21, 2025, labeled PRIVATE PACK AltairSupport, containing 19,011 records. The file included email addresses, plaintext passwords, and URLs tied to web endpoints and API hosts. The label "PRIVATE PACK" is a naming convention used in Telegram credential trading communities to signal that the data is fresh and has not been widely circulated yet, which typically makes it more valuble to buyers looking for working logins. By the time HEROIC analysts detected and documanted this upload, it had already begun spreading to adjacent channels.

Why This Is Dangerous

The phrase "private pack" in the file name signals something specific to the criminal market: this data was being positioned as premium, first-access credentials. That means buyers who got this file early were likely among the first to attempt credential stuffing attacks against the affected accounts. With 19,011 plaintext password and email pairs, an attacker does not need any technical skill beyond running a basic automation script. The victims of this breach may have had their accounts tested and compromised before they had any way of knowing their data was out there.

What Was Exposed

• Email addresses
• Plaintext passwords (unprotected and immediately usable)
• Web endpoint URLs
• API host addresses
• 19,011 total credential records

Why This Matters

Credential stuffing is one of the most common and damaging forms of account compromise, and stealer logs like this one are the primary fuel for those attacks. When attackers have a list of working email and password pairs, they systematicly test them across banking, social media, email, and e-commerce platforms. Even a small success rate across 19,011 records translates to hundreds of compromised accounts. If you share a password between your work email and personal accounts, a breach like this can cascade across your entire digital life.

How Stealer Log Attacks Work

Information-stealing malware is typically spread through phishing campaigns, fake download pages, or malicious email attachments. Once it infects a device, it immediately begins harvesting saved passwords from browsers, password managers, and local application data. It collects URLs and API credentials alongside those passwords, then transmits everything in a structured log file back to the attacker. These logs are then sold or shared on Telegram channels, often categorized by region, freshness, or target type. The AltairSupport Private Pack followed this pipeline precisely, moving from infection to public distribution within weeks.

Check If You Are Affected

To find out if your email appeared in the AltairSupport Private Pack or any other stealer log, use HEROIC's free breach scanner. HEROIC tracks over 400 billion breached records, including private packs and stealer logs from Telegram that most other breach databases never index. A free search takes seconds and shows you every breach where your data has appeared. If your email shows up, change your passwords immediately and enable two-factor authentication on your most important accounts.