Detection rules › Sigma

Suspicious Process Execution From Fake Recycle.Bin Folder

Status
test
Severity
high
Log source
product windows, category process_creation
Author
X__Junior (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects process execution from a fake recycle bin folder, often used to avoid security solution.

MITRE ATT&CK coverage

TacticTechniques
PersistenceNo specific technique
StealthNo specific technique

Event coverage

Rule body yaml

title: Suspicious Process Execution From Fake Recycle.Bin Folder
id: 5ce0f04e-3efc-42af-839d-5b3a543b76c0
related:
    - id: cd8b36ac-8e4a-4c2f-a402-a29b8fbd5bca
      type: derived
status: test
description: Detects process execution from a fake recycle bin folder, often used to avoid security solution.
references:
    - https://www.mandiant.com/resources/blog/infected-usb-steal-secrets
    - https://unit42.paloaltonetworks.com/cloaked-ursa-phishing/
author: X__Junior (Nextron Systems)
date: 2023-07-12
modified: 2023-12-11
tags:
    - attack.persistence
    - attack.stealth
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|contains:
            # e.g. C:\$RECYCLER.BIN
            - 'RECYCLERS.BIN\'
            - 'RECYCLER.BIN\'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Image|contains:
        - 'RECYCLERS.BIN\'
        - 'RECYCLER.BIN\'

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
Imagematch
  • RECYCLER.BIN\ corpus 2 (sigma 2)
  • RECYCLERS.BIN\ corpus 2 (sigma 2)