Sigma rule: HackTool - RemoteKrbRelay SMB Relay Secrets Dump Module Indicators

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-c3a3ea91a8e5, updated 2024-06-27T00:00:00.000Z.

Rule

Title: HackTool - RemoteKrbRelay SMB Relay Secrets Dump Module Indicators
Status: test
Level: high
Author: Nasreddine Bencherchali (Nextron Systems)
Date: 2024-06-27
File: rules/windows/file/file_event/file_event_win_hktl_krbrelay_remote_ioc.yml
Commit: ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the creation of file with specific names used by RemoteKrbRelay SMB Relay attack module.

Log source

product: windows
category: file_event

Detection

selection:
    TargetFilename|endswith:
        - ':\windows\temp\sam.tmp'
        - ':\windows\temp\sec.tmp'
        - ':\windows\temp\sys.tmp'
condition: selection

False positives (as the rule lists them)

Unlikely

MITRE ATT&CK ids this rule names

T1219.002

References

https://github.com/CICADA8-Research/RemoteKrbRelay/blob/19ec76ba7aa50c2722b23359bc4541c0a9b2611c/Exploit/RemoteKrbRelay/Relay/Attacks/RemoteRegistry.cs#L31-L40

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/file/file_event/file_event_win_hktl_krbrelay_remote_ioc.yml

Sources and licences

SigmaHQ
"HackTool - RemoteKrbRelay SMB Relay Secrets Dump Module Indicators" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/file/file_event/file_event_win_hktl_krbrelay_remote_ioc.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: HackTool - RemoteKrbRelay SMB Relay Secrets Dump Module Indicators",
entity page, dataset version ref-c3a3ea91a8e5, updated 2024-06-27T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/3ab79e90-9fab-4cdf-a7b2-6522bc742adb (accessed 2026-11-03).
Underlying source: SigmaHQ rule 3ab79e90-9fab-4cdf-a7b2-6522bc742adb, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.