I had a pleasure (or not) of working on another incident where, among other things, attackers were using a pretty novel way of exfiltrating data and using that channel for C&C communication. Some of the methods observed in analyzed code were pretty scary â from a defender's point of view, as you will see further below in this diary.
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Abusing Google Chrome extension syncing for data exfiltration and C&C, (Thu, Feb 4th)
I had a pleasure (or not) of working on another incident where, among other things, attackers were using a pretty novel way of exfiltrating data and using that channel for C&C communication. Some of the methods observed in analyzed…
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title: Detect Exploitation - Abusing Google Chrome extension syncing for data exfiltration and C&C, (Thu, Feb 4th)
id: 7622aa5b-ab9f-4c4b-8500-a3bfce84532a
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-24
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessrule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-24"
description = "YARA Signature for "
strings:
$str = "Abusing Google Chrome extensio" ascii wide
condition:
any of them
}tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich Abusing Google Chrome extension syncing .... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
🛡️ Angriffsfläche & Exposure
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
⚡ Empfohlene Sofortmaßnahmen
- 1. Perimeter-Inspektion: Relevante Portfreigaben und exponierte Endpunkte unverzüglich scannen.
- 2. Patch-Applikation: Hersteller-Hotfix einspielen oder betroffene Daemons in isolierte DMZ-Segmente überführen.
- 3. Telemetrie & EDR-Alerts: Prozessaufrufe und Child-Processes auf anomale Shell-Spawns überwachen.
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