ClickFix Removes Your Background but Leaves the Malware

BackgroundFix masquerades as a free image-editing tool but functions as a ClickFix social engineering lure. The fake service prompts users to verify they are human, copying malicious commands to their clipboard that invoke finger.exe to retrieve additional payloads. This chain delivers CastleLoader, which subsequently drops NetSupport RAT and a custom .NET stealer dubbed CastleStealer. The loader uses reflective PE injection, API hashing, and ChaCha20-encrypted C2 communications. CastleStealer targets browser credentials, cryptocurrency wallet extensions, and Telegram sessions through DPAPI decryption and Restart Manager APIs. The campaign leverages BYOI tactics with embedded Python interpreters and multiple shellcode stages. A notable implementation flaw exists where launch method 4 references regsrv32.exe instead of the correct regsvr32.exe, causing silent failures.

Pulse ID: 69f36a0940fe2fa665ebe32e
Pulse Link: https://otx.alienvault.com/pulse/69f36a0940fe2fa665ebe32e
Pulse Author: AlienVault
Created: 2026-04-30 14:41:13

Be advised, this data is unverified and should be considered preliminary. Always do further verification.

#Browser #ChaCha20 #Clipboard #CyberSecurity #ICS #InfoSec #Malware #NET #NetSupport #NetSupportRAT #OTX #OpenThreatExchange #Python #RAT #ShellCode #SocialEngineering #Telegram #bot #cryptocurrency #AlienVault

Our latest TDR report on the #IClickFix framework:

📊 3,800+ WordPress sites compromised worldwide
⚙️ Multi-stage JavaScript loader
🚦 Abusing YOURLS as TDS
🖱️ Fake Cloudflare CAPTCHA and #ClickFix lure
🦠 #NetSupport RAT payload

https://infosec.exchange/@sekoia_io/115977607660963600

#TDR analysts deep dived into a widespread malicious JavaScript framework injected into 3,800+ WordPress sites to distribute #NetSupport RAT via the #ClickFix social engineering tactic.

https://blog.sekoia.io/meet-iclickfix-a-widespread-wordpress-targeting-framework-using-the-clickfix-tactic/

2025-12-29 (Monday): #ClickFix page leads to #NetSupportRAT infection.

Details at www.malware-traffic-analysis.net/2025/12/29/index.html

Of note, this is not from the usual ClickFix campaigns that I track. While #SmartApeSG has often pushed #NetSupport #RAT, this is a completely different vector for the initial URL.

The initial sites.google[.]com URLs for this campaign are sent via email. But I don't have an example for this particular infection chain.

«Медвед» атакует: что мы узнали про фишинговую кампанию группировки, нацеленной на российские организации

В октябре 2025 года мы, группа киберразведки департамента Threat Intelligence, зафиксировала продолжающуюся фишинговую активность хакерской группировки, которую мы назвали NetMedved. Обоснование выбора данного наименования будет рассмотрено в заключительной части статьи. Атаки хакеров ориентированы на российские организации; в качестве конечной полезной нагрузки используется вредоносная версия легитимного инструмента удалённого администрирования NetSupport Manager (далее — NetSupportRAT). В этой статье расскажем о специфике кампании и связи с нашими предыдущими находками.

https://habr.com/ru/companies/pt/articles/968572/

#киберразведка #расследование_инцидентов #кибератаки #хакерская_группировка #хакерские_инструменты #фишинговые_письма #вредоносное_программное_обеспечение #малварь #finger #netsupport

2025-08-22 (Friday): #SmartApeSG for #NetSupport #RAT (#NetSupportRAT)

Some sites have injected script that leads directly to the fake CAPTCHA page for #ClickFix instructions.

Other sites have injected script that redirects to the URL for the fake CAPTCHA page.

Direct example (compromised site --> script for CAPTCHA page):

- hxxps[:]//mexicobusiness[.]news/
- hxxps[:]//clouwave[.]net/ajax/pixi.min.js

Recirect example (compromised site --> Redirect URL --> script for CAPTCHA page):

- hxxps[:]//myvocabulary[.]com/
- hxxps[:]//myevmanual[.]com/d.js <-- 302 found for next URL
- hxxps[:]//clouwave[.]net/ajax/pixi.min.js

Either way, you get the same CAPTCHA page.

IOCs at https://github.com/malware-traffic/indicators/blob/main/2025-08-22-IOCs-for-SmartApeSG-activity.txt

cc: @monitorsg