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GCleaner

61
Global rank
23 infographic chevron month
Month rank
17 infographic chevron week
Week rank
566
IOCs

GCleaner is a type of malware loader that has the capability to deliver numerous malicious software programs, which differ based on the location of the targeted victim. This malware is commonly spread through fraudulent websites that advertise free PC optimization tools

Loader
Type
Unknown
Origin
19 September, 2019
First seen
16 April, 2024
Last seen

How to analyze GCleaner with ANY.RUN

Type
Unknown
Origin
19 September, 2019
First seen
16 April, 2024
Last seen

IOCs

IP addresses
5.42.65.115
185.172.128.90
5.42.65.85
45.12.253.75
5.12.253.98
107.182.129.235
171.22.30.106
45.139.105.171
85.31.46.167
203.159.80.49
5.12.253.724
45.12.253.564
212.192.246.217
Hashes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http://185.172.128.90/cpa/ping.php
http://5.42.65.115/advdlc.php
http://5.42.65.115/download.php
http://5.42.65.115/batushka/inte.exe
http://5.42.64.3/installer/setup.php
http://5.42.64.3/dll/key.php
http://5.42.65.115/
http://5.42.65.115/icons/text.gif
http://5.42.65.115/icons/folder.gif
http://5.42.65.115/files/
http://5.42.65.115/getsizes.php
http://5.42.65.115/checkk.txt
http://5.42.65.115/uload.php
http://5.42.65.115/phpmyadmin/themes/pmahomme/img/b_help.png
http://5.42.65.115/phpmyadmin/themes/pmahomme/css/printview.css
http://5.42.65.115/phpmyadmin/themes/dot.gif
http://5.42.65.115/phpmyadmin/themes/pmahomme/img/logo_right.png
http://5.42.65.115/phpmyadmin/favicon.ico
http://5.42.65.115/phpmyadmin/js/dist/rte.js
http://5.42.65.115/phpmyadmin/js/vendor/jquery/jquery-ui-timepicker-addon.js
Last Seen at

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What is the GCleaner loader malware?

The system optimizer market has for a long time been a breeding ground for all kinds of malicious software masking as legitimate to dupe users into downloading and installing it. G-Cleaner, also known as GCleaner, is a notable example of a fake PC optimization program, appearing to be genuine at first glance. In reality, it is a loader designed with one purpose: to get hold of victims’ sensitive data.

GCleaner is a loader, which was first spotted in early 2019. It is capable of a wide variety of malicious activities depending on the payload it is equipped with. Analysts have observed it to drop malware such as AZORult, the Raccoon info stealer, Smoke Loader, RedLine Stealer, and other popular families, depending on the victim’s geographic location.

The GCleaner malware is primarily known as one of the most widespread fake Windows utilities that is intended for targeting both organizations and individuals. It attempts to capitalize on the popularity of system cleaning tools by taking advantage of people’s negligence.

The identity of the individuals responsible for developing the G-Cleaner malware remains a mystery. Nonetheless, experts in the field of cybersecurity suspect that the creation of this malicious software was the work of a highly skilled and organized criminal organization.

Technical details of the GCleaner malicious software

Once G-Cleaner is installed on a computer, it extracts a malicious file in the system's temporary files folder and downloads a payload. For instance, GCleaner often drops AZORult and RedLine, stealers that scan the system for any type of personal information, which from now on becomes known to the attackers, including:

  • Passwords;
  • Credit card details;
  • Crypto addresses.

Although each malware family may exploit different types of vulnerabilities, in most cases, the process involves hijacking the victim’s web browser and then recording their keystrokes.

GCleaner makes use of different persistence mechanisms. For instance, after installation, it creates a number of new processes running in the background. The malware also writes data to a remote process, which is typically a legitimate Windows process. This makes it difficult for antivirus software to detect and remove the malware.

GCleaner attempts to stay hidden by using rootkit capabilities, which allow it to hide its presence from the operating system. As an extra layer of protection, it implements encryption to obfuscate its code, rendering it unreadable and harder for researchers to analyze.

Anti-debugging is also on the menu, which hinders reverse engineering efforts, making it challenging for analysts to debug the code and understand how it works.

Execution process of the GCleaner malware

By utilizing ANY.RUN, we can track the entire execution path of G-Cleaner and retrieve its config automatically. Here is a sample of the malware analyzed in our sandbox.

Gcleaner's configuration extracted by ANY.RUN Gcleaner's configuration extracted by ANY.RUN

Since GCleaner is a loader, its main purpose is to download other malware families. As a result, the execution flow varies from one version to another and can include the use of different tools. Overall, after it starts, the loader simply reruns itself under a different name from one of the "Program Files" directories. After that, it mostly attempts to download malware onto the infected system. In our case, GCleaner downloaded Redline.

Gcleaner’s network traffic Gcleaner's network traffic

Some samples of GCleaner may be detected by the malware’s network traffic. To do so, just look at the network stream. If you find "itsnotmalware/count.php" there, you can be pretty sure that it is GCleaner.

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Distribution methods of the G-Cleaner malware

G-Cleaner has several channels for finding its way to users’ systems:

The most common one is through a website promoting a free optimizer. In fact, such was the first instance of this malware being discovered in 2019. The design of the page is reminiscent of those of CCleaner and other trusted providers, which is how criminals trick users into downloading malware.

Another widespread distribution method for G-Cleaner is through spam emails disguised as legitimate messages from international brands. In such cases, attackers utilize social engineering techniques to get users to install email attachments.

Alternatively, GCleaner can be masked as files not related to PC optimization. These may include game modes, patches, and other types of software.

Conclusion

G-Cleaner is a loader capable of introducing a range of malicious software onto the victim's computer. Generally, it is disseminated through fake websites advertising free PC performance optimization tools or via spam emails.

To prevent GCleaner and other malware from posing a risk to your organization’s infrastructure, you can conveniently scrutinize any questionable files using the ANY.RUN interactive malware analysis sandbox to quickly identify harmful code, study its behavior, and collect IOCs.

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