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Detection rules › Sigma

HackTool - NPPSpy Hacktool Usage

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

Detects the use of NPPSpy hacktool that stores cleartext passwords of users that logged in to a local file

MITRE ATT&CK coverage

TacticTechniques
Credential AccessNo specific technique

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 11: FileCreate

Rule body

title: HackTool - NPPSpy Hacktool Usage
id: cad1fe90-2406-44dc-bd03-59d0b58fe722
status: test
description: Detects the use of NPPSpy hacktool that stores cleartext passwords of users that logged in to a local file
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1003/T1003.md#atomic-test-2---credential-dumping-with-nppspy
    - https://twitter.com/0gtweet/status/1465282548494487554
author: Florian Roth (Nextron Systems)
date: 2021-11-29
modified: 2024-06-27
tags:
    - attack.credential-access
logsource:
    product: windows
    category: file_event
detection:
    selection:
        TargetFilename|endswith:
            - '\NPPSpy.txt'
            - '\NPPSpy.dll'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    TargetFilename|endswith:
        - '\NPPSpy.txt'
        - '\NPPSpy.dll'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
TargetFilenameends_with
  • \NPPSpy.dll
  • \NPPSpy.txt
field:"TargetFilename" kind:ends_with