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Detection rules › Sigma

BITS Transfer Job Download To Potential Suspicious Folder

Status
test
Severity
high
Log source
product windows, service bits-client
Author
Florian Roth (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects new BITS transfer job where the LocalName/Saved file is stored in a potentially suspicious location

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1197 BITS Jobs
PersistenceT1197 BITS Jobs
StealthT1197 BITS Jobs

Event coverage

ProviderEventTitle
Bits-ClientEvent ID 16403task_016403

Rule body yaml

title: BITS Transfer Job Download To Potential Suspicious Folder
id: f8a56cb7-a363-44ed-a82f-5926bb44cd05
status: test
description: Detects new BITS transfer job where the LocalName/Saved file is stored in a potentially suspicious location
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1197/T1197.md
author: Florian Roth (Nextron Systems)
date: 2022-06-28
modified: 2023-03-27
tags:
    - attack.persistence
    - attack.execution
    - attack.stealth
    - attack.t1197
logsource:
    product: windows
    service: bits-client
detection:
    selection:
        EventID: 16403
        LocalName|contains:
            # TODO: Add more interesting suspicious paths
            - '\Desktop\'
            - 'C:\Users\Public\'
            - 'C:\PerfLogs\'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    EventID: 16403
    LocalName|contains:
        - '\Desktop\'
        - 'C:\Users\Public\'
        - 'C:\PerfLogs\'

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.

FieldKindValues
LocalNamematch
  • C:\PerfLogs\
  • C:\Users\Public\
  • \Desktop\