The ArhontCloud Log Contains Exactly 42,520 Email and Password Pairs

On August 1st, 2025, security analysts found a stealer log file that had been uploaded to a public Telegram channel by an anonymous user. The file, now known as the ArhontCloud leak, contained 42,520 records collected from compromised endpoints. Each entry in the log included an email address, a plaintext password, and a URL, many of which pointed to API hosts or login pages that victims had accessed. The passwords were completely unencrypted, ready to be used the moment someone downloaded the file. There was no hacking required on the attacker's end, just a download and a login attempt.

Why This Is Dangerous

Every one of those 42,520 records is an open door. Attackers feed these email and password combinations into automated credential stuffing tools that test them against Netflix, PayPal, Google, Amazon, and workplace platforms within minutes. The API host URLs included in this dump are particularly serious because they can allow attackers to access back-end systems programatically, bypassing normal login screens entirely. That kind of access can expose not just personal accounts but entire organisational infrastructures to someone sitting anywhere in the world with nothing more than a laptop.

What Was Exposed in the ArhontCloud Dump

• Email addresses
• Plaintext passwords (unencrypted, no hashing)
• URLs, including API host endpoints

Why This Matters

Password reuse is the single biggest reason why a single stealer log can cause such widespread damage. When someone uses the same password on three or four different sites, one compromised device hands attackers access to all of them. Credential stuffing leading to account takeover is one of the fastest growing forms of online fraud. Once inside an email account, attackers can reset passwords on banks, intercept verification codes, and lock victims out of their own accounts. Identity theft and financial fraud often follow within days of a dump like this going public.

How Stealer Log Breaches Work

An infostealer is a type of malware designed to do one thing well: steal credentials. It typically lands on a victim's computer through a fake app download, a compromised software update, or a link in a phishing email. Once installed, it runs silently in the backround, harvesting saved passwords from browsers like Chrome and Firefox, capturing login details as they are typed, and logging the URLs of sites the user visits. All of this is packaged into a log file and transmited back to the attacker. Those files then circulate on Telegram channels and underground marketplaces, often within hours of the initial infection.

Check If You Are Affected

HEROIC's free breach scanner checks your email address against a database of more than 400 billion compromised records, including this ArhontCloud dump. No account is needed and it takes just seconds. If your email appears in this leak or any other breach we have indexed, you will find out immediately so you can take action before an attacker does.