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59 Victims, Zero Authentication: A ClickFix Campaign Force-Installs a Chrome Extension Banking Stealer and Leaves the Entire C2 Wide Open

0
Medium
Published: Tue Apr 14 2026 (04/14/2026, 13:56:58 UTC)
Source: AlienVault OTX General

Description

A Brazilian banking fraud operation leveraging ClickFix social engineering was discovered through a community tip, exposing a completely unauthenticated command-and-control infrastructure. The campaign deploys a malicious Chrome extension masquerading as a Banco Central do Brasil tool, force-installed via Chrome Cloud Management enrollment tokens. The extension achieves zero antivirus detections while targeting eight Brazilian financial institutions. At investigation time, 59 machines were compromised with seven active connections. The operator's C2 server exposed all endpoints without authentication, including admin panels, live victim screenshots, stolen credentials in cleartext, and intercepted Pix payment data. Attribution was established through WHOIS records revealing the operator's real name, CPF, and email address. The operation specifically targeted Northern Brazilian regional banks and credit cooperatives, with evidence of compromising a school fund account.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 04/14/2026, 14:31:50 UTC

Technical Analysis

This threat involves a banking malware campaign in Brazil that uses ClickFix social engineering to force-install a malicious Chrome extension via Chrome Cloud Management enrollment tokens. The extension masquerades as an official Banco Central do Brasil tool and targets eight financial institutions. The campaign has compromised 59 machines with seven active connections at the time of investigation. The operator's command-and-control server is completely unauthenticated, exposing all endpoints including administrative interfaces, live victim screenshots, stolen credentials in plaintext, and intercepted Pix payment data. Attribution was possible through WHOIS records revealing the operator's real identity. The campaign focuses on Northern Brazilian regional banks and credit cooperatives, with evidence of financial theft from a school fund account.

Potential Impact

The campaign results in credential theft, session hijacking, and interception of Pix payment data from victims. The unauthenticated C2 infrastructure exposes sensitive stolen data and live victim information, increasing the risk of further exploitation or data leakage. At least 59 machines were compromised, affecting multiple Brazilian financial institutions and credit cooperatives. The attack undermines trust in Chrome extensions and cloud management enrollment mechanisms. The exposure of operator identity may aid law enforcement but does not mitigate ongoing risk to victims.

Mitigation Recommendations

No official patch or remediation is indicated. Since the attack uses Chrome Cloud Management enrollment tokens to force-install the malicious extension, organizations should audit and restrict token issuance and enrollment permissions. Remove the malicious Chrome extension from affected machines and monitor for unauthorized extensions. Secure any exposed C2 infrastructure if under organizational control. Users should be alerted to avoid installing suspicious extensions and verify extension sources. Patch status is not yet confirmed — check vendor advisories and security community updates for remediation guidance.

Affected Countries

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Technical Details

Author
AlienVault
Tlp
white
References
["https://intel.breakglass.tech/post/clickfix-chrome-extension-banking-stealer-59-victims-unauthenticated-c2"]
Adversary
ANTONIO EDUARDO FREDERICO
Pulse Id
69de47aacc631b04e06bae89
Threat Score
null

Indicators of Compromise

Ip

ValueDescriptionCopy
ip144.126.140.33

Hash

ValueDescriptionCopy
hash386d4093f70219b8291d3f9e6f71ee1f
hashbdac75f0e71a6e2ee2030259ad5ff7c002ebc98d
hash401c125517b1f845289bf0a7a33e5db0391034f631eab85dd65b76b7fec9a959
hashb68eefb10e2c304681532bc0c812c7905888e6b8e47448f1e4bc1edfe7ac193d

Url

ValueDescriptionCopy
urlhttp://144.126.140.33:3000
urlhttp://144.126.140.33:3000/admin
urlhttp://144.126.140.33:3000/api/users
urlhttp://144.126.140.33:3000/openapi.json
urlhttp://144.126.140.33:5000
urlhttp://protocolovirtual.org
urlhttp://test1.amanur.com
urlhttp://xpie348.online/instalador/get_token.ps1
urlhttp://xpie348.online/instalador/update.xml

Domain

ValueDescriptionCopy
domainamanur.com
domaincertificadosuporte.com.br
domainprotocolovirtual.org
domainxpie348.online
domaintest1.amanur.com

Threat ID: 69de4c5382d89c981fa44b81

Added to database: 4/14/2026, 2:16:51 PM

Last enriched: 4/14/2026, 2:31:50 PM

Last updated: 4/14/2026, 8:34:38 PM

Views: 8

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