MediumSigmaHQ Florian Roth (Nextron Systems)

BITS Transfer Job With Uncommon Or Suspicious Remote TLD

Detects a suspicious download using the BITS client from a FQDN that is unusual. Adversaries may abuse BITS jobs to persistently execute or clean up after malicious payloads.

Detection logic

Detection requirements

Platform: Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: windows
Log source service: bits_client

Known benign triggers

This rule doesn't exclude other known TLDs such as ".org" or ".net". It's recommended to apply additional filters for software and scripts that leverage the BITS service

References

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1197/T1197.md	Detection test	6
twitter.com/malmoeb/status/1535142803075960832	Social post	2

Detection rules

BITS Transfer Job With Uncommon Or Suspicious Remote TLD

Detection logic

Detection requirements

Known benign triggers

MITRE ATT&CK mappings

References

From the source

Licence

Authorship

Detection rules