Malicious Hunters International Ransomware Execution via rundll32

ATT&CK techniques

Defense Evasion → Impact

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1218.011Rundll32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
- T1486Data Encrypted for Impact

What it detects

This rule detects rundll32.exe executing the Hunters International ransomware encryptor DLL through its Open export with the operator flags used to target running processes. This proxy execution technique masks the ransomware payload behind a signed Windows binary immediately before mass file encryption, making it a critical late-stage indicator.

Reporting behind it

Related detections9 linkedT1486 — drag to rearrange

Malicious LockBit Rundll32 Execution With gdll Export and -pass Argument

Malicious ESXiArgs Encryptor Execution Referencing Dropped Public Key (via process_creation)

Malicious ESXiArgs Ransomware Public Key Drop in Temp Directory (via file_event)

Malicious TellYouThePass Ransomware Note Creation

Malicious CrazyHunter Ransomware Toolkit Execution from Public Directory

Malicious Rundll32 RunHTMLApplication Remote Execution

Malicious Black Basta ESXi Ransomware Volume Enumeration and Encryption via Command Line (via process_creation)

Suspicious Rundll32 Execution of PhotoViewer.dll ImageView_Fullscreen (via process_creation)

Malicious IcedID Loader Execution via Rundll32 from Excel Macro (via process_creation)

Malicious Hunters International Ransomware Execution via rundll32

Pivot detection · T1486 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

Full detection rule

Unlock this rule to view and copy it

The detection logic is included with a plan. Everything else — context, mappings and implementation details — stays free on this page.

Sign in for 3 free unlocks

Signing in gives you 3 unlocks to spend on any rule in the library. No card, and they do not expire.

Also included

Unlocked rules convert on this page — to Splunk SPL or Splunk — Raw Index SPL or Microsoft Sentinel KQL or Microsoft Sentinel ASIM ASIM KQL or Microsoft Defender XDR KQL or Elastic Security KQL or Elastic Security Lucene or Elastic Security ES|QL or CrowdStrike Falcon CQL or SentinelOne PowerQuery or Palo Alto Cortex XDR XQL or Carbon Black Cloud Platform Search or Carbon Black EDR Process Search or Google Security Operations UDM Search or IBM QRadar AQL or Sumo Logic Cloud SIEM Rules expression or Rapid7 InsightIDR LEQL or Graylog Search or OpenSearch Lucene or OpenSearch PPL PPL or Grafana Loki LogQL or SQLite SQL or Zircolite SQLite — with the log-source profile the engine picked, the field map it used, and everything it could not express. Converting a rule you have unlocked costs no further credit.

See it run on a free rule →Convert your own rule →