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InstallFix is a social-engineering-driven malware delivery technique and campaign cluster within the broader ClickFix family. It abuses a common user workflow in which victims copy and paste installation commands from web pages into a terminal or command shell. Operators clone legitimate software installation or documentation pages, replace the published command with an attacker-controlled one, and rely on the victim to execute it manually. This makes InstallFix primarily an initial-access mechanism rather than a single payload family, and it is commonly used to deliver infostealers and other follow-on malware.
Observed InstallFix activity has targeted users seeking developer and AI-related tools, including campaigns that impersonated installation guidance for Anthropic Claude Code. Traffic to the fake pages has been driven through malicious search advertising, with cloned pages hosted on reputable web platforms to improve credibility and reduce immediate detection or takedown. The technique has been observed against both Windows and macOS users, and reporting on the broader ClickFix ecosystem indicates similar copy-and-paste terminal lures can also affect Linux workflows.
The malicious commands used in InstallFix campaigns commonly function as downloaders or launchers. They may retrieve a second-stage payload from attacker infrastructure, save it locally, execute it directly, or run scripts in memory. On Windows, observed execution chains have included shell and scripting utilities spawning additional native tools to fetch and run later stages. Post-execution behavior associated with InstallFix-delivered payloads includes persistence, staging of collected data, command-and-control communications, and theft of browser credentials, cookies, and authentication tokens. In one reported campaign, the delivered payload matched Amatera Stealer, an infostealer associated with credential and session theft.
InstallFix became notably prominent in early 2026 incident reporting and was assessed as part of a broader shift toward social-engineering-based malware delivery that exploits user trust in installation guides and one-line setup commands rather than traditional exploit chains or malicious attachments.
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3 distinct techniques documented for this family, organized by ATT&CK tactic.
12 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.
IPs, domains, and DNS infrastructure linked to this family.
File hashes (MD5, SHA-1, SHA-256) from samples and reports.
Other indicator types observed in public reporting.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A named variant of the broader ClickFix-style attack pattern in which users are deceived into running attacker-provided commands under the guise of fixing or installing software.
A malware delivery variant tied to ClickFix-style social engineering. It uses fake software installation pages, including cloned AI tool documentation, to trick users into copying and executing malicious commands themselves.
A malware distribution campaign that uses cloned software installation pages and malicious one-line install commands (e.g., curl-to-bash) to trick users into executing an infostealer payload on Windows and macOS.
Malware/campaign name associated with weaponized (malvertised) software installation guides used to trick users into installing malicious payloads.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.