Antivirus Check and Remote Loader Retrieval in LNK Command Chain

ATT&CK techniques

Execution → C2

Recon
Resource Dev
Initial Access
Execution
- T1127.001MSBuild
Persistence
Priv Esc
Defense Evasion
- T1127.001MSBuild
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects a command chain that checks for the ESET kernel service with tasklist and findstr then downloads a remote payload and hands it to MSBuild for execution. This LNK based initial access is used by Unfading Sea Haze.

Reporting behind it

Related detections9 linkedT1105 — drag to rearrange

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Suspicious WebDAV Retrieval via rundll32 and davclnt.dll (via process_creation)

Malicious MSBuild Execution of Downloaded csproj Project File (via process_creation)

Suspicious PowerShell Download to Temp and In-Memory Execution via IEX (via process_creation)

Suspicious PowerShell Download of Bumblebee Stager Files (via process_creation)

Antivirus Check and Remote Loader Retrieval in LNK Command Chain

Pivot detection · T1105 · 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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