Email medium is mainly used by attackers nowadays which carried out a variety of malware campaign and spreading across the world to infect a large number of users.
SmokeLoader Malware has acted and taken advantage of the infamous bug Meltdown and Spectre which affects almost all the modern processors and pushes Smoke Loader malware as a patch.
In this case, attackers using a different kind of Email body content to gain more trust from the targeting users and compromise them to believe it as a legitimate one.
Also, attacker injecting shellcode into office document and compromise users to enable the macro which leads to install the malicious code on the victim’s machine.
How does this Smokeloader Malware infect the users
Initially, attacker distributing Spam Email campaign that contains an information about job applications which is not actually a legitimate content.
In this case, attacker protects an attached file with a password to evade the email security software.
Once the user opens the attachment, it promotes to enter the password which is given in the body of the email.
After users enter the password, a malicious word document will be downloaded which contains a Malicious macro code and the document keep asking users to enable the Macro to infect the user.
Once the user enabled the macro, suddenly a PowerShell” script will be executed in the background and it will launch a payload.
According to QuickHeal, If we look closely, the malicious file is hosted as a poop.jpg file on the attacker’s server, which is actually an executable SmokeLoader malware. This file is dropped with the name DKSPKD.exe at %Temp% location and launched to perform malicious activities.
This Malware will be taking advantage of Microsoft Window 8 and above the platform and during the Execution process SmokeLoader malware can also download other malware to infect the user.
How to protect:
— Always keep your OS and software updated
— Train staff never open attachments or click on a URL in unsolicited e-mails
— Use Anti Spam Gateways such as Comodo Antispam Gateway for defense against spam, phishing emails, and virus-infected attachments
— Turn on Your Firewall
— Limit the user Privilege
— Use caution when clicking on links to web pages