Account Takeover Gets Easier: 343 Plaintext Logins in the BOSS Log

BOSS is a stealer log, a file of logins pulled from infected devices, and the copy HEROIC analysts reviewed is dated August 29, 2026. It holds 343 records with email addresses, plaintext passwords and URLs. The file is small, which makes it easy to overlook, but anyone in it has a working password out in the open. To find out if that includes you, scan your email.

Small File, Same Danger Per Person

343 records will never make headlines next to files with millions of lines. For the people inside, though, size is irrelevant. A single readable password for a single account is enough to lose an inbox or a bank login.

What Each BOSS Record Hands Over

• Email addresses tell an attacker whose account it is and where reset links will go.
• Plaintext passwords are readable straight away, so there is nothing to crack.
• URLs name the site each login opens, which is where an attacker will try it first.

The Consequences Start With a Single Login

Account takeover is the immediate risk. From a hijacked email account an attacker can request password resets elsewhere, and from there identity theft and financial fraud are within reach. Reused passwords make every step easier.

How a Stealer Log Ends Up Like BOSS

Stealer malware runs on a victim's own computer or phone, copies the logins saved in its browser and sends them to the attacker. The result is a file such as BOSS: 343 records, each one taken from a device that was itself infected. Changing a password does not fix the infection, and that is the part people miss.

Are You One of the 343 in the BOSS Log?

The fastest answer is to scan your email. If your address is in it, clean or reset the affected device first, then change your passwords from a clean one, beginning with email and banking.

It applies to personal and work addresses alike.