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March 25, 2023Severity Medium Analysis Summary GandCrab – a ransomware-as-a-service variant – was discovered in early 2018. At least five versions of GandCrab have been created since its […]March 25, 2023Severity Medium Analysis Summary NjRat is a Remote Access Trojan, which is found leveraging Pastebin to deliver a second-stage payload after initial infection. There are multiple […]March 24, 2023Severity Medium Analysis Summary CVE-2023-20113 Cisco SD-WAN vManage Software is vulnerable to cross-site request forgery, caused by improper validation of user-supplied input. By persuading an authenticated […]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 25, 2023Severity Medium Analysis Summary GandCrab – a ransomware-as-a-service variant – was discovered in early 2018. At least five versions of GandCrab have been created since its […]March 25, 2023Severity Medium Analysis Summary NjRat is a Remote Access Trojan, which is found leveraging Pastebin to deliver a second-stage payload after initial infection. There are multiple […]March 24, 2023Severity Medium Analysis Summary CVE-2023-20113 Cisco SD-WAN vManage Software is vulnerable to cross-site request forgery, caused by improper validation of user-supplied input. By persuading an authenticated […]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 Alert – Trickbot Info-Stealer Active Infection Campaigns – IoCs
November 20, 2019Rewterz Threat Advisory – Flexera FlexNet Publisher Memory Corruption Vulnerabilities
November 21, 2019
Severity
High
Analysis Summary
Linux servers running unpatched Webmin installations are under attack and slowly getting added to a new peer-to-peer (P2P) botnet dubbed Roboto by security researchers who tracked it for roughly three months.
After examining the malware components captured so far, researchers found that the Roboto bots support seven functions, including reverse shell, self uninstall, system command execution, harvesting and exfiltrating process and network information, run encrypted payloads from remote URLs, and launch DDoS attacks.
While the researchers found that the DDoS module supports four types of DDoS attack methods — ICMP Flood, HTTP Flood, TCP Flood, and UDP Flood — depending on the system permissions it can gain on the compromised Linux servers, not even a single Roboto DDoS attack was detected since they started tracking it.
To compromise new systems and add them to the botnet, Roboto exploits a Webmin RCE vulnerability tracked as CVE-2019-15107 to drop its downloader module on Linux servers running vulnerable installations of Unix Webmin web-based system administration tool.
Impact
- Command injection
- Exposure of sensitive information
Affected Vendors
Linux
Affected Products
Webmin
Remediation
- Update to version Webmin 1.930 .
- Disable the user password change option.