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March 17, 2023Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]March 17, 2023Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]March 17, 2023Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]Threat Insights
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
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Platform
Managed Security Services
Managed Penetration Testing
Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Resources
March 17, 2023Severity High Analysis Summary Chaos is a customizable ransomware builder that emerged on June 9 2021 (in underground forums) by falsely marketing itself as the .NET […]March 17, 2023Severity High Analysis Summary CVE-2023-26361 CVSS:4.9 Adobe ColdFusion could allow a remote authenticated attacker to traverse directories on the system. An attacker could send a specially […]March 17, 2023Severity Medium Analysis Summary Ursnif banking trojan also known as Gozi and Dreambot has been around for more than 10 years. It gained popularity in 2015 […]Threat Insights
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Connect with Us
Rewterz Threat Advisory – CVE-2019-6465 – F5 Multiple Products Bind Security Bypass Vulnerability
February 28, 2019Rewterz Threat Alert – Multiple SWIFT-themed Phishing campaigns – Threat Indicators
March 1, 2019
Severity
Medium
Analysis Summary
Multiple PDF samples are discovered in the wild which exploit a Google Chrome unpatched flaw. The exploited vulnerability allows the sender of the PDF files to track the users and collect some user information when they use Google Chrome as a local PDF viewer.
These samples acted alright in the local PDF viewer but made suspicious outbound traffic when they were opened locally on Google Chrome.
Researchers observed that data was being sent to readnotify[.]com without informing user. The traffic is a HTTP POST packet, according to which following information of the user may be collected by the malicious sender:
- The public IP address of the user.
- OS, Chrome version etc. (in HTTP POST header).
- The full path of the PDF file on user’s computer (in HTTP POST payload).
This affects Google Chrome (as local PDF viewer), not Adobe Reader and does not allow NTLM stealing, but it leaks your OS information and the path of the file stored on your local disk.
Another PDF sample cpmmunicated with hxxp[:]//zuxjk0dftoamimorjl9dfhr44vap3fr7ovgi76w[.]burpcollaborator[.]net
Impact
Personal Information Disclosure
Affected Products
Google Chrome
Indicators of Compromise
IP(s) / Hostname(s)
zuxjk0dftoamimorjl9dfhr44vap3fr7ovgi76w[.]burpcollaborator[.]net
52[.]16[.]21[.]24
91[.]103[.]1[.]84
URLs
hxxp[:]//zuxjk0dftoamimorjl9dfhr44vap3fr7ovgi76w[.]burpcollaborator[.]net
readnotify[.]com
Filename
- honduras-bginfo.pdf
- hond-la-moskitia.pdf
- minimal.pdf
- western-honduras.pdf
- honduras-directory.pdf
- central-honduras.pdf
- hond-tegucigalpa.pdf
- honduras-the-bay-islands-health.pdf
- honduras-bginfo.pdf
Malware Hash (MD5/SHA1/SH256)
- 2dd6ade4d0d4dc8224b28f8819b1c49bb7ae4025933e737ac8069c496d88bb43
- 286ed6d0261aed1115e06e2e8cf0af840297241e9dc9494a496a2c8b75457749
- 58959ac247caf322c800616f3526828d
- 19ac1c943d8d9e7b71404b29ac15f37cd230a463003445b47441dc443d616afd
- d949720af989e5e492570f0918362867
- a21a4fcc75cd20a0965f1673b98c0dd688711c40cbabf92a5e5cd1f31a7ac684
- 4eb84fee8e92685b6a789f1af5c732c7
- 1d151793f521419c1470079a37b1e37b8b59a5b69a5506f1d0dbee6f3995b25d
- 6cfddeaf454995a0d6038363231f69a3
- 0c3e8efd667f7ff1549bfd2a4498105cb2607314d73b7105f4c1d747d7341090
- aa7a1c701e99f345b0e37aa52f895b79
- fb56efe75f3b4509d5a2e0655536d9dab121798d92b8660121bd4691265a87e3
- c82dcf3998782306d71b1f360cc3f8a1
- 622624d6f161b7d2fa7859d46792dd6bb49024b432b04106b1818510a2037689
- e1ae5658b61972bd173b669b8b6931dd
- 0cc1234c981806dd22e0e98e4be002e8df8d285b055e7f891ff8e91af59aee1e
- 54ff8899c86142bdf2dde6468ca17750
- 13090c4e8338fa2769a29356de72b306
- 2dd6ade4d0d4dc8224b28f8819b1c49bb7ae4025933e737ac8069c496d88bb43
- 286ed6d0261aed1115e06e2e8cf0af840297241e9dc9494a496a2c8b75457749
- 58959ac247caf322c800616f3526828d
- 19ac1c943d8d9e7b71404b29ac15f37cd230a463003445b47441dc443d616afd
- d949720af989e5e492570f0918362867
- a21a4fcc75cd20a0965f1673b98c0dd688711c40cbabf92a5e5cd1f31a7ac684
- 4eb84fee8e92685b6a789f1af5c732c7
- 1d151793f521419c1470079a37b1e37b8b59a5b69a5506f1d0dbee6f3995b25d
- 6cfddeaf454995a0d6038363231f69a3
- 0c3e8efd667f7ff1549bfd2a4498105cb2607314d73b7105f4c1d747d7341090
- aa7a1c701e99f345b0e37aa52f895b79
- fb56efe75f3b4509d5a2e0655536d9dab121798d92b8660121bd4691265a87e3
- c82dcf3998782306d71b1f360cc3f8a1
- 622624d6f161b7d2fa7859d46792dd6bb49024b432b04106b1818510a2037689
- e1ae5658b61972bd173b669b8b6931dd
- 0cc1234c981806dd22e0e98e4be002e8df8d285b055e7f891ff8e91af59aee1e
- 54ff8899c86142bdf2dde6468ca17750
- 13090c4e8338fa2769a29356de72b30
Remediation
- Block the threat indicators at their respective controls.
- Use alternative PDF reader application for viewing received PDF documents locally until Chrome fixes the issue, or disconnect computer from the Internet when opening PDF documents in Chrome.