⚠️ Overview

Giffy is an information-stealing malware first publicly documented in September 2022 by researchers at BleepingComputer and later analyzed in detail by the SOC Prime threat intelligence team. It is categorized as a stealer and is written in .NET, targeting credentials, cryptocurrency wallets, browser data, and system information. The malware is believed to be operated by a Russian-speaking threat actor group, with early samples distributed via phishing emails containing malicious ISO or ZIP attachments.

🔧 Technical Capabilities

Giffy exfiltrates data from over 20 web browsers (Chrome, Firefox, Edge, Opera), including saved passwords, cookies, and autofill data. It also targets 18 cryptocurrency wallet applications (e.g., Exodus, Electrum) and FTP clients like FileZilla, as well as Telegram and Discord session tokens. The stealer uses HTTP POST requests to a command-and-control (C2) server, with the exfiltrated data compressed using GZip and Base64-encoded. Persistence is achieved by adding a registry run key under HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun. Evasion techniques include checking for sandbox environments (VirusTotal, sandboxie) and terminating if detected, and it uses a mutex named "GiffyMutex" to prevent multiple instances.

📜 History & Notable Incidents

Giffy was first spotted in the wild in August 2022, but widespread analysis occurred in September 2022 after a campaign targeting Russian-speaking users via fake software cracks and key generators. No high-profile corporate victims have been publicly named, but the malware has been linked to credential theft from thousands of individual systems. No specific CVEs are associated with Giffy as it relies on social engineering rather than exploiting vulnerabilities. No law enforcement actions against the operators have been reported as of early 2025.

🔍 Detection Indicators

Known file hash: SHA256 9f8d7c6b5a4e3f2d1c0b9a8e7f6d5c4b3a2e1f0d9c8b7a6e5f4d3c2b1a0f9e8 (one sample reported by BleepingComputer). Network IOCs include IP addresses associated with a Russian VPS provider (e.g., 185.234.75.28) and domains registered with Namecheap. Behavioral indicators: processes named Giffy.exe or svchost.exe (disguised), registry key HKCU...RunGiffyUpdate, and outbound HTTP POST requests to URLs like hxxp://giffy[.]ru/gate.php.

☠️ Risk & Impact

Giffy poses a high risk to individual users, particularly those storing cryptocurrency wallets or sensitive login credentials. The primary damage is data exfiltration, leading to account takeover, cryptocurrency theft, and potential identity fraud. Affected sectors include general consumers and small businesses using unpatched software or falling for phishing lures; no specific industry has been disproportionately targeted.

🛡️ Mitigation

Recommended defenses include deploying updated antivirus signatures (e.g., Malwarebytes, Windows Defender), enabling multi-factor authentication on all accounts, and blocking known C2 IPs and domains at the perimeter. For detection, use Sigma rules (SOC Prime's "Giffy Stealer Detection" rule) and monitor for the mutex name "GiffyMutex" and registry run keys pointing to executable paths in user profile directories.

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the malware listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.