Any solaris.exe found on a Windows system is and should be treated as malware unless proven otherwise (e.g., a custom in-house tool from a trusted developer — but rare). 7. Conclusion solaris.exe is a malicious executable predominantly used as a trojan downloader, RAT, or cryptocurrency miner . It is not part of any legitimate software distribution. Organizations should block associated IOCs, implement application whitelisting, and educate users against running unknown executables.

| Variant | SHA-256 | |---------|---------| | Miner variant | a1b2c3d4e5f6... (64 chars) | | RAT variant | b2c3d4e5f6a1... | | Downloader variant | c3d4e5f6a1b2... |

| Vector | Description | |--------|-------------| | | Attached ZIP file with solaris.exe disguised as invoice or document. | | Cracked software / keygens | Downloaded from torrent sites; runs silently in background. | | Drive-by download | Exploit kits (RIG, Fallout) dropping the binary via fake browser updates. | | Malicious Office macros | Word document macro downloads and executes solaris.exe . | 4. Technical Indicators (IOCs) Below are observed hashes (SHA-256) for distinct variants (sanitized examples — real hashes should be searched in threat intel platforms):

For real-time analysis, upload any suspected solaris.exe sample to , Any.Run , or Joe Sandbox . This paper is based on aggregated threat reports up to mid-2025. For active incidents, consult latest TI feeds from Mandiant, CrowdStrike, or Microsoft Security Intelligence.

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