Inside AYANKOUJI Private Stealer Logs: How 814 Credentials Got Harvested

HEROIC analysts flagged a stealer log upload to a public Telegram channel on October 31, 2025, filed under the label AYANKOUJI PRIVATE 594 part 2. The log was identified during continuous monitoring of illicit credential-sharing platforms where private collections are routinely distributed. The dataset contained 814 records consisting of email addresses, plaintext passwords, and endpoint URLs. While smaller in volume than many dumps we track, the private designation in the filename suggests these credentials were intentionally curated and held back from broader distribution, indicatng they may carry higher value or specificity than bulk commodity logs.

Why This Is Dangerous

Smaller, private stealer log collections are often more dangerous than mass dumps because they tend to be fresher and more targeted. An attacker with 814 carefully selected credentials can work through them methodically, testing each one against high-value targets like corporate email portals, cloud dashboards, or financial platforms. The plaintext passwords eliminate any cracking step. The URLs included in the log also tell an attacker exactly which services the victim was logged into, making targeted account takeover straightforward. Private collections like this one often command higher prices on underground markets precisely because of their quality over quantity profile.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• Endpoint and API Host URLs

Why This Matters

Even 814 records can cause serious harm when the credentials are fresh and valid. Attackers use these email and password pairs in credential stuffing campaigns that run automated login attempts against dozens of platforms simultaneously. Successful logins lead to account takeovers, which can escalate into identity theft, unauthorized purchases, fraudulent wire transfers, or deeper corporate network intrusions if any of the compromised accounts belong to employees. The presence of API host URLs amplifies the risk by potentially exposing access to backend systems and developer infrastructure.

Inside the AYANKOUJI Private Stealer Log Collection

The AYANKOUJI label appears to reference a threat actor or distributor who packages stealer log collections for private distribution on Telegram. Private collections like this are typically assembled from multiple infostealer campaigns, then filtered and deduped before being shared selectively. The malware feeding these collections is usually deployed through phishing lures, trojanized software bundles, or browser extension hijacks. The victim's device runs the stealer silently in the background, capturing credentials as they are entered or retrieved from password managers and browser storage. The attacker then aggregates logs from many infected machines into a named collection, which may be sold, traded, or uploaded in parts over time. The part 2 designation here confirms this is a serialized release from an ongoing campaign.

Check If You Are Affected

If you received a suspicious link, downloaded unfamiliar software, or noticed unexplained login activity around October 2025, your credentials may be in this collection. HEROIC monitors over 400 billion compromised records across thousands of breaches and stealer log dumps. Search your email at heroic.com to find out if your data appeard in this or any other verified breach.