Phantom Stealer phishing delivery and exfiltration activity
Malware Activity
Summary
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Phantom Stealer is being delivered through a phishing campaign that uses a ZIP-to-ISO attachment chain to bypass mail defenses, exposing Russian-speaking organizations to credential theft and token theft. The lure is a fake bank transfer confirmation written in formal Russian business language. Once opened, the attachment chain mounts an ISO and launches a disguised executable that deploys the stealer in memory. The activity matters because it combines ISO-based initial access with broad browser, wallet, and token harvesting plus multi-channel exfiltration.
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About this happening:
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Timeline
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15.12.2025 18:00 2 articles · 5mo ago
Operation MoneyMount-ISO delivers Phantom Stealer
Initial DisclosureSeqrite Labs identified Operation MoneyMount-ISO, a Russia-origin phishing campaign that used a fake payment confirmation email and a ZIP-to-ISO attachment chain to deploy Phantom Stealer into Russian-speaking organizations, with a clear focus on finance, accounting, treasury and payments teams. The staged payload chain mounted an ISO, launched a disguised executable, decrypted a malicious DLL, injected the stealer in memory, and used anti-analysis checks to evade sandboxes and virtual machines before exfiltrating browser passwords, cookies, credit-card data, cryptocurrency wallets, keystrokes, clipboard contents, and Discord authentication tokens through Telegram bots, Discord webhooks and FTP servers.
Show sources
- Russian Phishing Campaign Delivers Phantom Stealer Via ISO Files — www.infosecurity-magazine.com — 15.12.2025 18:00
- Russian Phishing Campaign Delivers Phantom Stealer Via ISO Files — www.infosecurity-magazine.com — 15.12.2025 18:00