Topic starter
24/10/2026 8:48 pm
TL;DR: DonutLoader combines obfuscated scripting, process injection, and anti-analysis steps to keep a Windows .NET implant resident in memory, Aryaka found. Windows defenders need process, script, and memory telemetry together to spot the chain before the loader settles in.
Editorial analysis by NHI Mgmt Group, based on content published by Aryaka: “Beyond the Batch File: A Look at a Multi-Stage DonutLoader Infection Chain”.
Key questions
Q: Why do process injection and telemetry tampering make loader malware harder to contain?
A: Process injection moves malicious code into a trusted host, while AMSI and ETW tampering reduce the logs and content inspections that would normally expose it.
Q: What are the signs that a Windows loader is moving toward in-memory execution?
A: Look for batch scripts that unpack payloads, create hidden staging directories, launch renamed interpreters, and then generate unusual memory activity in trusted processes.
Q: What breaks when Windows loaders hide in renamed PowerShell and scheduled tasks?
A: Renamed interpreters and scheduled tasks break simple allowlisting and event triage because the execution path looks like routine system activity.
Practitioner guidance
- Hunt for hidden staging directories and renamed binaries Prioritise ProgramData paths, non-standard PowerShell names, and unusual script launch chains that do not match normal administration patterns.
- Monitor for scheduled-task persistence at logon Review scheduled tasks that execute scripts or interpreters at user logon, especially when they point to hidden directories or renamed executables.
- Correlate process injection with memory-resident execution Look for cross-process memory writes, private executable memory, and explorer.exe as a host for unusual child activity.
Bottom line: DonutLoader combines obfuscated scripting, persistence, and memory injection to make a Windows implant harder to see and harder to remove.
Glossary terms: Process Injection, AMSI Tampering, Scheduled-Task Persistence
Explore further
View Full Forum → | NHI Foundation Course → | Our Services → | Read the full analysis →
This topic was modified 6 days ago by NHI Mgmt Group
25/10/2026 11:11 am
Execution hiding has become the real control problem: this campaign shows that the hard part is no longer just stopping malware from arriving. It is preventing adversaries from borrowing trusted Windows execution paths, process memory, and scheduled-task infrastructure to make malicious code look native. That shifts the control conversation toward behavioural correlation, process ancestry, and tamper resistance.
A question worth separating out:
Q: How should defenders respond when AMSI or ETW tampering appears in a process chain?
A: Treat it as a high-confidence intrusion signal and immediately widen the hunt to the parent process, nearby scheduled tasks, and any injected memory regions. If telemetry is being suppressed, the safest response is to assume the host has already crossed into active compromise and validate other endpoints that share the same execution pattern.
👉 Read our full editorial: DonutLoader uses process injection and script obfuscation on Windows
This post was modified 6 days ago by NHI Mgmt Group