PUBLISH DATE: December 14, 2018
The Cobalt hacking group has resurfaced with a new variant of the ThreadKit exploit builder kit for Microsoft Oﬃce documents. The ThreadKit macro delivery tool with its modiﬁed technique deploys a payload on victim’s system called CobInt, a signature malware for the Cobalt group. CobInt, also known as COOLPANTS, is a backdoor used by Cobalt for reconnaissance purposes that was discovered on a command and control (C2) server operated by the hackers.
The group uses advanced phishing techniques in their emails to lure users into downloading the payloads on their system. The email addresses have a domain belonging to ﬁnancial sector and banks. A remote code is executed by exploiting the following vulnerability in Internet Explorer. The group exploits CVE-2018-8174, a remote code execution vulnerability that exists in the way that the VBScript engine handles objects in memory. This may cause memory corruption and will lead to code execution in the context of current user. If the user is logged in as an administrator, attackers can also gain system access.
Remote Code Execution System Access
Indicators of Compromise
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Strictly monitor the given Indicators of Compromise and block where possible. Due diligence is suggested prior to blocking of domains.
If you think you’re a victim of a cyber-attack, immediately send an email to firstname.lastname@example.org.