Cloud Hosting Users Exposed: OttomanCloud LummaC2 Leak Hit 12,779 Accounts

HEROIC analysts discovered a stealer log file on a public Telegram channel in December 2024, uploaded under the filename LUMMAC_201PCS_19_12_2024_OTTOMANCLOUD_GIFT_OTTOHELP. The discovery was made during active monitoring of underground sharing platforms where cloud service credentials are frequently trafficked. The log exposed 12,779 records tied to OttomanCloud and associated services, with data including email addresses, plaintext passwords, and service URLs. The LUMMAC designation in the filename is a known shorthand referencing the LummaC2 infostealer family, a widely deployed piece of credential-harvesting malware actively targeting cloud platform users.

Why This Is Dangerous

Cloud service credentials are among the most valueable assets an attacker can obtain. With valid email and password combinations from an OttomanCloud environment, an attacker can log into hosted applications, access stored files, spin up infrastructure at the victim's expense, or pivot into connected business systems. The plaintext nature of the passwords in this dump means no additional cracking is needed. LummaC2 is one of the most widely deployed infostealer families in circulation, which suggests this batch is one of many the operators behind it have distributed from similar campaigns.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• Service and API URLs

Why This Matters

Cloud platform breaches carry outsized risk because a single account often provides access to multiple downstream services, databases, and applications. Credential stuffing attacks using this data can result in full account takeovers across email, SaaS tools, and cloud storage. Victims may face identity theft if personal information is stored in compromised cloud accounts, or financial fraud if billing and payment data is accessible. Businesses using OttomanCloud for hosting or infrastructure face the additional risk of operational disruption and data exfiltration from their hosted services.

How Stealer Logs Work

A stealer log is the output of infostealer malware running on an infected device. The LummaC2 variant referenced in this dump is a commodity malware toolkit sold on criminal forums and deployed via phishing campaigns, cracked software downloads, and malvertising. Once executed on a victim machine, it scrapes saved credentials from browsers, email clients, and desktop applications, then packages everything into a structured log file for exfiltration. These logs are often sold in bulk on dark web markets or shared freely on Telegram as part of botnet affiliate programs. The OTTOMANCLOUD and OTTOHELP tags in the filename suggest targeted collection against users of those specific platforms.

Check If You Are Affected

If you use or have used OttomanCloud, OttoHelp, or any related cloud hosting services, your credentials may appear in this dump. HEROIC's breach search engine indexes over 400 billion compromised records, including this dataset. Visit heroic.com to run a free check using your email address and find out wheather your data has been exposed in this or any other known breach.