Fickle Stealer Archives

Winsage

April 8, 2025

EncryptHub plays dual role as cybercriminal and Windows researcher

EncryptHub, a threat actor linked to intrusions at 618 organizations, reported two Windows zero-day vulnerabilities, CVE-2025-24061 and CVE-2025-24071, to Microsoft, which were resolved in March 2025. The vulnerabilities were reported by an individual named SkorikARI, who has been connected to EncryptHub after the threat actor exposed its login credentials. Researchers at Outpost24 identified this link through multiple pieces of evidence, including exfiltrated password files and a GitHub login associated with SkorikARI. EncryptHub has a history of selling zero-days on hacking forums and has been involved in both freelance development and cybercriminal activities. Despite his expertise, the hacker fell victim to poor security practices, leading to the exposure of personal information and interactions with ChatGPT regarding malware development and self-assessment as a hacker.

Winsage

April 7, 2025

EncryptHub’s dual life: Cybercriminal vs Windows bug-bounty researcher

EncryptHub has been linked to breaches affecting 618 organizations and is associated with the disclosure of two Windows zero-day vulnerabilities, CVE-2025-24061 and CVE-2025-24071, to Microsoft. The vulnerabilities were addressed during the March 2025 Patch Tuesday updates, and the reporter was acknowledged as 'SkorikARI with SkorikARI.' Investigations revealed a connection between EncryptHub and SkorikARI, following an incident where EncryptHub exposed their credentials. SkorikARI's accounts were used to report the vulnerabilities, contributing to Windows security. Evidence linking SkorikARI to EncryptHub includes password files exfiltrated from EncryptHub's system and a GitHub account associated with SkorikARI. EncryptHub has previously attempted to market zero-day vulnerabilities on underground forums and is believed to have affiliations with ransomware groups. The threat actor has executed social engineering campaigns, phishing attacks, and developed a custom infostealer known as Fickle Stealer. They created fictitious social media profiles and websites, such as a fake project management application called GartoriSpace, which installed malicious files on unsuspecting users. EncryptHub has also been implicated in exploiting a Microsoft Management Console vulnerability, CVE-2025-26633.

Winsage

June 20, 2024

New Rust-based malware targets Microsoft Windows, abuses Powershell, and steals sensitive info

A new infostealer called Fickle Stealer is spreading through the internet, stealing sensitive files and data. It is based on the Rust programming language and sends stolen data to a Telegram bot. Infostealers are a prevalent form of malware that can lead to unauthorized access to accounts and phishing scams. Protection against infostealers involves avoiding suspicious downloads and scrutinizing email attachments.

Winsage

June 20, 2024

Fickle Stealer Attacking Windows Machine To Steal Sensitive Data

Fickle Stealer is a high-tech Rust-based malicious program that delivers itself through various methods, including VBA droppers and downloaders. It uses PowerShell scripts to evade UAC and communicates via Telegram. The malware disguises itself as genuine software and targets crypto wallets and sensitive data.