Suspicious Msiexec Remote Package Installation from URL via Process Creation
- Product
- windows
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-07-20
- Updated
- 2026-08-28
ATT&CK techniques
Defense Evasion → C2Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
Exfiltration
Impact
What it detects
This rule detects msiexec.exe installing an MSI package directly from a remote HTTP or HTTPS URL, a technique used in the Operation Rusty Flag campaign to deploy a Rust implant from a Dropbox-hosted MSI reached through a double-extension LNK. Adversaries abuse the trusted Windows Installer to proxy execution and pull payloads while evading application controls.
Reporting behind it
- deepinstinct.comhttps://www.deepinstinct.com/blog/operation-rusty-flag-a-malicious-campaign-against-azerbaijanian-targets
- attack.mitre.orghttps://attack.mitre.org/techniques/T1218/007/
- research.checkpoint.comhttps://research.checkpoint.com/2023/raspberry-robin-anti-evasion-how-to-exploit-analysis/
- huntress.comhttps://www.huntress.com/blog/fake-anydesk-clickfix-metastealer-malware
- attack.mitre.orghttps://attack.mitre.org/techniques/T1218.007/
- attack.mitre.orghttps://attack.mitre.org/techniques/T1105/
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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