What Attackers Can Do With the abv.bg Stealer Log’s 1,081 Logins

What Attackers Can Do With the abv.bg Stealer Log

On December 10, 2022, HEROIC analysts identified a stealer log file, labeled "abv.bg fixed," shared by a user on Telegram. The file contained 1,081 records, each pairing an email address with a plaintext password and the web address the login was used on. The name suggests the file was gathered or filtered to focus on logins connected to the abv.bg email service, though the leaked data itself covers the standard mix of accounts typically found in stealer logs.

Why This Is Dangerous

With the passwords stored in plaintext, anyone who obtains this file can use the credentials immediately, without needing to crack or guess anything. An attacker holding this log could attempt to log directly into each victim's email account, then use that access to reset passwords on other services tied to the same address, such as banking, shopping, or social media accounts. Email accounts in particular act as a master key, since most password reset links get sent straight there.

What Was Exposed

• Email addresses
• Plaintext passwords
• Website login URLs tied to each credential

Why This Matters

Because email inboxes are the gateway to so many other accounts, a compromised email login can quickly cascade into a much bigger problem. Attackers who gain access to an inbox can search it for further personal details, reset passwords elsewhere, or use it to send phishing messages to the victim's contacts. Anyone who reused their abv.bg password on other sites faces the added risk of those accounts being accessed too.

How Stealer Logs Work

This file was produced by infostealer malware, software that infects a device, often through a malicious download or phishing link, and then silently harvests saved logins straight from the browser. Once the malware finishes collecting data, it packages everything into a log file that gets sent to the attacker. From there, it may be filtered by domain, as appears to have happened here, and shared through Telegram channels or dark web marketplaces where other criminals can buy or download it.

Check If You Are Affected

If you use abv.bg or any similar email service, it is worth checking whether your login appears in a leak like this one. HEROIC's free breach scanner searches more than 400 billion leaked records, including stealer logs, to show you if your email address has been exposed. Run a free scan, and if it turns up a match, change that password right away and enable multi-factor authentication wherever it is available.