A Custom Python Backdoor for VMWare ESXi Servers

In October 2022, Juniper Threat Labs discovered a backdoor implanted on a VMware ESXi virtualization server. Since 2019, unpatched ESXi servers have been targets of ongoing in-the-wild attacks based on

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Asbit: An Emerging Remote Desktop Trojan

Introduction   Juniper Threat Labs is currently monitoring an emerging Chinese Remote Desktop Trojan called Asbit. It’s a remote access Trojan being advertised on its developer’s website as a “Fast

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CVE-2022-30190: Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability

A zero-day vulnerability was discovered on Microsoft Windows Support Diagnostic Tool (MSDT).  On May 27, a researcher who goes by the twitter handle nao_sec discovered an interesting Microsoft Word document

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Muhstik Gang targets Redis Servers

Juniper Threat Labs has uncovered an attack that targets Redis Servers using a recently disclosed vulnerability, namely CVE-2022-0543. This vulnerability exists in some Redis Debian packages. The attack started on

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Log4j Attack Payloads In The Wild

Juniper Threat Labs compiled a list of the payloads from log4j attacks we have seen as of 12/16. Most of the payloads install malware such as Muhstik, Kinsing, Mirai and

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Log4j Vulnerability: Attackers Shift Focus From LDAP to RMI

In a previous post, we discussed the Log4j vulnerability CVE-2021-44228 and how the exploit works when the attacker uses a Lightweight Directory Access Protocol (LDAP) service to exploit the vulnerability.

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Apache Log4j Vulnerability CVE-2021-44228 Raises widespread Concerns

Log4j is a popular logging library used in Java by a large number of applications online. To enhance its functionality from basic log formatting, Log4j added the ability to perform

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Apache HTTP Server CVE-2021-42013 and CVE-2021-41773 Exploited in the Wild

Juniper Threat Labs has been seeing on-going attacks targeting Apache http servers. On October 4, the Apache Software Foundation disclosed CVE-2021-41773, a path traversal 0- day vulnerability with reports of

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Necro Python Botnet Goes After Vulnerable VisualTools DVR

In the last week of September 2021, Juniper Threat Labs detected a new activity from Necro Python (a.k.a N3Cr0m0rPh , Freakout, Python.IRCBot) that is actively exploiting some services, including a

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CVE-2021-22005: VMware vCenter Analytics Service Arbitrary File Upload Vulnerability

VMware vCenter server is a centralised management utility used for managing multiple ESXi hosts, virtual machines and all their dependent components. An arbitrary file upload vulnerability has recently been discovered in the Analytics

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