Potential SNAKE Malware Installation Binary Indicator

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

Detects a specific binary name seen used by SNAKE malware during its installation as described by CISA in their report

Known false positives

Unlikely

MITRE ATT&CK coverage

Tactic	Techniques
Execution	No specific technique

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 1: Process creation
Security-Auditing	Event ID 4688: A new process has been created.

Rule body

title: Potential SNAKE Malware Installation Binary Indicator
id: d91ff53f-fd0c-419d-a6b8-ae038d5c3733
status: test
description: Detects a specific binary name seen used by SNAKE malware during its installation as described by CISA in their report
references:
    - https://media.defense.gov/2023/May/09/2003218554/-1/-1/0/JOINT_CSA_HUNTING_RU_INTEL_SNAKE_MALWARE_20230509.PDF
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-04
tags:
    - attack.execution
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\jpsetup.exe'
            - '\jpinst.exe'
    filter_main_cli_name:
        CommandLine:
            - 'jpinst.exe'
            - 'jpinst'
            - 'jpsetup.exe'
            - 'jpsetup'
    filter_main_cli_empty:
        CommandLine: ''
    filter_main_cli_null:
        CommandLine: null
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: `condition`

selection and not 1 of filter_main_*

Stage 1: `selection`

selection:
    Image|endswith:
        - '\jpsetup.exe'
        - '\jpinst.exe'

Stage 2: `not filter_main_*`

filter_main_cli_name:
    CommandLine:
        - 'jpinst.exe'
        - 'jpinst'
        - 'jpsetup.exe'
        - 'jpsetup'
filter_main_cli_empty:
    CommandLine: ''
filter_main_cli_null:
    CommandLine: null

Exclusions

The rule actively suppresses these predicates.

Field	Kind	Excluded values	Search
`CommandLine`	eq	`jpinst`	`excludes:CommandLine` `field:"CommandLine" value:"jpinst"`
`CommandLine`	eq	`jpinst.exe`	`excludes:CommandLine` `field:"CommandLine" value:"jpinst.exe"`
`CommandLine`	eq	`jpsetup`	`excludes:CommandLine` `field:"CommandLine" value:"jpsetup"`
`CommandLine`	eq	`jpsetup.exe`	`excludes:CommandLine` `field:"CommandLine" value:"jpsetup.exe"`
`CommandLine`	is_null	(no value, null check)	`excludes:CommandLine`

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`Image`	ends_with	`\jpinst.exe` `\jpsetup.exe`	`field:"Image" kind:ends_with`