Fireball Archer Install

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

Detects Archer malware invocation via rundll32

MITRE ATT&CK coverage

Tactic	Techniques
Stealth	`T1218.011` System Binary Proxy Execution: Rundll32

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: Fireball Archer Install
id: 3d4aebe0-6d29-45b2-a8a4-3dfde586a26d
status: test
description: Detects Archer malware invocation via rundll32
references:
    - https://www.virustotal.com/en/file/9b4971349ae85aa09c0a69852ed3e626c954954a3927b3d1b6646f139b930022/analysis/
    - https://www.hybrid-analysis.com/sample/9b4971349ae85aa09c0a69852ed3e626c954954a3927b3d1b6646f139b930022?environmentId=100
author: Florian Roth (Nextron Systems)
date: 2017-06-03
modified: 2021-11-27
tags:
    - attack.execution
    - attack.stealth
    - attack.t1218.011
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - 'rundll32.exe'
            - 'InstallArcherSvc'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    CommandLine|contains|all:
        - 'rundll32.exe'
        - 'InstallArcherSvc'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`InstallArcherSvc` `rundll32.exe` corpus 8 (sigma 8)	`field:"CommandLine" kind:match`

Fireball Archer Install

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`