BITS Transfer Job Download From File Sharing Domains

Severity: high
Author: Florian Roth (Nextron Systems)
Source: upstream

Detects BITS transfer job downloading files from a file sharing domain.

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1197` BITS Jobs
Defense Evasion	`T1197` BITS Jobs

Event coverage

Provider	Event ID	Title
Bits-Client	16403

Stages and Predicates

Stage 1: `selection`

or:
RemoteName|contains: .githubusercontent.com
RemoteName|contains: anonfiles.com
RemoteName|contains: cdn.discordapp.com
RemoteName|contains: ddns.net
RemoteName|contains: dl.dropboxusercontent.com
RemoteName|contains: ghostbin.co
RemoteName|contains: github.com
RemoteName|contains: glitch.me
RemoteName|contains: gofile.io
RemoteName|contains: hastebin.com
RemoteName|contains: mediafire.com
RemoteName|contains: mega.nz
RemoteName|contains: onrender.com
RemoteName|contains: pages.dev
RemoteName|contains: paste.ee
RemoteName|contains: pastebin.com
RemoteName|contains: pastebin.pl
RemoteName|contains: pastetext.net
RemoteName|contains: pixeldrain.com
RemoteName|contains: privatlab.com
RemoteName|contains: privatlab.net
RemoteName|contains: send.exploit.in
RemoteName|contains: sendspace.com
RemoteName|contains: storage.googleapis.com
RemoteName|contains: storjshare.io
RemoteName|contains: supabase.co
RemoteName|contains: temp.sh
RemoteName|contains: transfer.sh
RemoteName|contains: trycloudflare.com
RemoteName|contains: ufile.io
RemoteName|contains: w3spaces.com
RemoteName|contains: workers.dev

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`RemoteName`	match	`.githubusercontent.com` `anonfiles.com` `cdn.discordapp.com` `ddns.net` `dl.dropboxusercontent.com` `ghostbin.co` `github.com` `glitch.me` `gofile.io` `hastebin.com` `mediafire.com` `mega.nz` `onrender.com` `pages.dev` `paste.ee` `pastebin.com` `pastebin.pl` `pastetext.net` `pixeldrain.com` `privatlab.com` `privatlab.net` `send.exploit.in` `sendspace.com` `storage.googleapis.com` `storjshare.io` `supabase.co` `temp.sh` `transfer.sh` `trycloudflare.com` `ufile.io` `w3spaces.com` `workers.dev`

Neighbors

Broader alternatives (more inclusive than this rule)

These rules match a superset of what this rule catches. They cover the same events plus more. Use them if you want wider coverage and can absorb more false positives.

BITS Transfer Job With Uncommon Or Suspicious Remote TLD [sigma] (drops 1 filter this rule applies) (first-stage match only; downstream stages may differ)