Plaintext Passwords in the LeakBase 5.7Kk ULP by Firegoon — 1.2M Unique Records Exposed
One forum post. One stealer log. 1,197,751 unique email-and-password pairs exposed in plaintext. On October 30, 2024, a threat actor operating under the handle firegoon posted a credential list to a prominent underground hacking forum under the name "5,7Kk ULP by firegoon." The post claimed approximately 5.7 million total records -- but after deduplication, analysts confirmed just under 1.2 million unique entries. What makes this release stand out is the same detail that defines firegoon's broader publishing pattern: every credential is stored in plaintext, ready to use in automated login attacks without any cracking required. This is one entry in a long-running series of ULP (URL-Login-Password) releases attributed to firegoon on LeakBase. See Related Parts below for sibling releases.
Why This Is Dangerous
Stealer log credentials are not theoretical threats -- they are operationally ready. Unlike hashed password dumps that require cracking, plaintext credentials from infostealer malware can be fed directly into credential stuffing tools the moment they are posted. Firegoon's logs consistently include the target URL alongside the credential, meaning attackers know exactly which site to test each pair against. With 1.2 million unique accounts exposed, the attack surface is substantial.
What Was Exposed
- Email addresses -- primary account identifiers
- Homepage URLs -- the specific websites where credentials were captured
- Plaintext passwords -- no hashing, no cracking required
Unique records confirmed: 1,197,751 | Total records claimed: ~5.7 million | Date posted: October 30, 2024
Why This Matters
Stealer log dumps like this one are a primary driver of account takeover fraud. Because most users reuse passwords across services, a single compromised credential can unlock email inboxes, banking portals, social media accounts, and workplace tools. The URL field in ULP logs makes credential stuffing hyper-targeted -- attackers do not need to guess where to try the password. The downstream risks include:
- Credential stuffing -- automated login attacks against the exact sites listed in the log
- Account takeover -- unauthorized access to email, banking, and social accounts
- Identity theft -- leveraging account access to harvest further personal details
- Fraud -- financial transactions, fraudulent purchases, or SIM-swap attacks initiated from compromised accounts
How Stealer Log Breaches Work
Infostealer malware -- such as RedLine, Raccoon, or Vidar -- is typically delivered via phishing emails, malicious downloads, or cracked software. Once installed on a victim's device, the malware silently harvests saved browser credentials, including the URL, username or email, and password for every saved login. These credentials are exfiltrated to the attacker's command-and-control server. The attacker then compiles the haul into a ULP (URL-Login-Password) list and either sells it privately or posts it to forums like LeakBase for notoriety or trade. The "5,7Kk" designation refers to the approximate record count in thousands (Kk = thousands of thousands, i.e., millions -- in this context approximately 5.7 million raw lines).
Check If You Are Affected
Heroic's dark web monitoring database contains over 400 billion exposed records, including stealer log compilations from LeakBase and similar forums. If your email address or your organization's credentials appear in this or related firegoon releases, you will be alerted instantly.
Search Heroic's 400B+ record database now to check if your credentials were exposed.
Related Parts -- Firegoon ULP Series on LeakBase
This release is part of a broader pattern of credential dumps posted by the threat actor firegoon to LeakBase. Other confirmed releases in this series include:
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