Malicious more_eggs LOLBIN Scriptlet Execution via ie4uinit BaseSettings Abuse (via process_creation)

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1204.002Malicious File
Persistence
Priv Esc
Defense Evasion
- T1218System Binary Proxy Execution
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the ie4uinit LOLBIN being run with the -basesettings flag from a user-writable location such as AppData, the first-stage technique in the more_eggs TA4557 resume-lure intrusion where a copied ie4uinit loaded a malicious SCT through a planted ieuinit.inf. Adversaries relocate this signed binary to abuse its inf-driven command execution while evading path-based controls, so an out-of-System32 ie4uinit with -basesettings indicates staged code execution.

Reporting behind it

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Malicious more_eggs LOLBIN Scriptlet Execution via ie4uinit BaseSettings Abuse (via process_creation)

Pivot detection · T1204.002 · 9 related

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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