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IOCs

Arkei is a stealer type malware capable of collecting passwords, autosaved forms, cryptocurrency wallet credentials, and files.

Stealer
Type
ex-USSR
Origin
21 May, 2018
First seen
28 June, 2024
Last seen
Also known as
ArkeiStealer

How to analyze Arkei with ANY.RUN

Type
ex-USSR
Origin
21 May, 2018
First seen
28 June, 2024
Last seen

IOCs

IP addresses
104.0.0.0
1.1.1.1
103.0.0.0
5.252.178.50
45.84.0.112
45.67.229.135
45.67.35.117
176.126.113.228
146.19.247.187
62.204.41.126
Hashes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mas.to
URLs
http://prepepe.ac.ug/msvcp140.dll
http://prepepe.ac.ug/sqlite3.dll
http://prepepe.ac.ug/freebl3.dll
http://prepepe.ac.ug/mozglue.dll
http://prepepe.ac.ug/vcruntime140.dll
http://prepepe.ac.ug/nss3.dll
http://prepepe.ac.ug/softokn3.dll
http://pretorian.ac.ug/index.php
http://anstransport.com/cgi-sys/suspendedpage.cgi
http://anstransport.com/7.jpg
http://anstransport.com/5.jpg
http://anstransport.com/4.jpg
http://anstransport.com/3.jpg
http://anstransport.com/2.jpg
http://anstransport.com/1.jpg
http://anstransport.com/6.jpg
http://panel.com/7.jpg
http://panel.com/4.jpg
http://panel.com/5.jpg
http://panel.com/3.jpg
Last Seen at

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What is Arkei malware

Arkei is a stealer designed to exfiltrate information from infected systems. Typical for this malware type, it is distributed using Malware-as-a-Service (MaaL) model, which means that anyone can use the malware with minimal technical knowledge — all you need is to purchase access to a control pane from a website that sells the service.

This malware — which is written in C++ — targets Windows systems and is considered a medium impact and medium risk threat.

Having been around since 2018, Arkei has become popular among adversaries: not only is it widely used, but it has spawned several forks including Mars, Oski, and Vidar stealer, which we have covered before in the ANY.RUN trends trackers.

Arkei is capable of retrieving a variety of information from infected machines, including:

  • Form autosaves stored in the browser
  • Login and passwords
  • Files
  • Cryptocurrency wallets

Cryptocurrency owners are at the highest risk and are the main targets of Arkei. It can extract data from around 40 crypto wallet extensions, including MetaMask that accounts for over 80% of web3 wallet usage.

The stealer also targets more than 30 web browsers, including Chrome, Firefox, Microsoft Edge, Opera, Brave, and TOR.

Arkei can also target 2FA extensions, a capability it has had roughly since the beginning of 2022. It's unclear how attackers are planning to use this data, but it's certain that this development could pose new risks for both corporate and private users.

The specific data types that the malware targets depend on its configuration file — a ​​Base64-encoded file with the .PHP extensions — and will vary from campaign to campaign. The attacker can use it to set Arkei's behavior with custom rules, and target specific information.

It is important to note that Arkei terminates execution on machines from the ex-USSR regions.

The stealer identifies the region by accessing the language identifier of the Region Format setting. This behavior is typical for malware originating from the ex-USSR territories, which gives an insight into Arkei’s origin.

Arkei is equipped with multiple evasion techniques that help it avoid detection. For example, it checks that the computer name is not set to ​ “”HAL9TH”” and the username to “”JohnDoe” — these are the default settings of the Windows Defender emulator. It also checks if several DLLs are loaded in a process against a list of antivirus and emulation software.

Once it's time to gather the data, Arkei compiles its findings into a .zip archive, gives it a random 12-character name, and sends it to its control server. In addition to the information specified by the config file, it captures a system screenshot and extracts system information.

How to get more information from Arkei malware

You can obtain Arkei’s malware configurations in the ANY.RUN's sample.

Malware configuration of Arkei stealer Figure 1: Arkei configuration automatically extracted by ANY.RUN

Users can access comprehensive malware configuration data on ANY.RUN interactive online sandbox in as little as 10 seconds after starting the sandbox. There's no need to wait for the emulation to finish running.

Arkei execution process

After a system is infected, a TCP connection is established with the hacker's remote server. The server sends encoded Base64 parameters to the malware, including search path templates and file search masks. Using these parameters, the malware determines which information it needs to steal from the victim's computer.

The malware then requests the libraries necessary for its operation from the remote server. These libraries are sent as ZIP archives.

Subsequent communication with the server involves sending stolen files to the C2 server. Some threat actors use packing techniques on Arkei samples (T1027.002) to avoid detection by signatures. An example of this behavior can be seen in this task we recorded in ANY.RUN.

After launching the packed sample, the AppLaunch.exe process is created in the system, which is part of the .NET Framework. The malicious code is then injected into this process.

Distribution of Arkei

Arkei finds its victims in a number of ways. It’s delivered with malicious email campaigns in infected attachments, distributed through malicious ads, and is sometimes found in cracked software.

Adversaries use trojan horse tactics to entice potential victims into installing Arkei to their systems: social engineering techniques can be utilized, such as offering a free version of a premium software.

Arkei has also been tied to campaigns utilizing SmokeLoader — an advanced modular malware used to gain an initial foothold in the system and drop other executables. Although Smoke Loader, as you probably have guessed from its name, is primarily used as a loader, it can be armed with information stealing functionality itself — double the threat, when used together with Arkei.

Conclusion

Arkei is a that poses a significant risk to users' sensitive data, particularly crypto wallets.

But users can keep their login and password information, files, and 2FA data secure by following these best practices:

  • Avoiding clicking on suspicious links
  • Being vigilant with emails from unknown senders
  • Staying clear from lurid ads
  • Being mindful where they download software from

You can identify and analyze threats like Arkei — and more — in a matter of minutes using ANY.RUN’s interactive sandbox. Sign up for a demo!

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