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Detection rules › Sigma

Octopus Scanner Malware

Status
test
Severity
high
Log source
category file_event, product windows
Author
NVISO
Source
github.com/SigmaHQ/sigma

Detects Octopus Scanner Malware.

MITRE ATT&CK coverage

TacticTechniques
Initial Access

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 11: FileCreate

Rule body

title: Octopus Scanner Malware
id: 805c55d9-31e6-4846-9878-c34c75054fe9
status: test
description: Detects Octopus Scanner Malware.
references:
    - https://securitylab.github.com/research/octopus-scanner-malware-open-source-supply-chain
author: NVISO
date: 2020-06-09
modified: 2021-11-27
tags:
    - attack.initial-access
    - attack.t1195
    - attack.t1195.001
logsource:
    product: windows
    category: file_event
detection:
    selection:
        TargetFilename|endswith:
            - '\AppData\Local\Microsoft\Cache134.dat'
            - '\AppData\Local\Microsoft\ExplorerSync.db'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    TargetFilename|endswith:
        - '\AppData\Local\Microsoft\Cache134.dat'
        - '\AppData\Local\Microsoft\ExplorerSync.db'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
TargetFilenameends_with
  • \AppData\Local\Microsoft\Cache134.dat
  • \AppData\Local\Microsoft\ExplorerSync.db
field:"TargetFilename" kind:ends_with