Malicious DLL Sideloading via WSPrint and BugSplatRc64 by UAT-9244

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1574.001DLL
Persistence
- T1574.001DLL
Priv Esc
- T1574.001DLL
Defense Evasion
- T1574.001DLL
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the WSPrint executable loading BugSplatRc64.dll from its ProgramData directory. UAT-9244 sideloads this DLL to execute follow-on implants under a benign-looking process. Loading a payload DLL from ProgramData through a planted executable is a hallmark of DLL search-order hijacking.

Reporting behind it

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Malicious DLL Sideloading via WSPrint and BugSplatRc64 by UAT-9244

Pivot detection · T1574.001 · 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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