Azorult

AZORult can steal banking information, including passwords and credit card details, as well as cryptocurrency. This constantly updated information stealer malware should not be taken lightly, as it continues to be an active threat.

Type
Stealer
Origin
ex-USSR
First seen
1 January, 2016
Last seen
2 August, 2021
Also known as
PuffStealer
Rultazo
Global rank
11
Week rank
14
Month rank
15
IOCs
15913

What is AZORult malware?

AZORult is an information stealer malware that is targeted at stealing credentials and accounts. Updated multiple times over the years, AZORult continues to be an active concern for the users, stealing information such as banking passwords, credit card details, browser histories, and even cryptocurrency.

AZORult stealer was discovered, analyzed, and documented for the first time on July 26, 2016, by Proofpoint researchers. At the time, the virus was distributed together with another trojan called Chthonic. However, subsequent spam email campaigns started distributing AZORult as the main payload while Hermes and Aurora ransomware were added as additional payloads. A new strain of the stealer Trojan was documented In July 2018. The analysis revealed that it brought several upgrades the functionality of both the stealer and the loader of the virus, additionally allowing to distribute AZORult with the RIG exploit kit. The latest recorded version of the malware is v3.3. This strain was first documented in October 2018. Most notably, this strain updated a way of encrypting the C&C domain string and improved crypto-stealing functionality.

General description of AZORult

A trojan type malware originated in one of the ex-USSR countries. AZORult searches for useful information on the affected computer and sends it to the C2 server to potentially steal the victim’s bank account data. AZORult can steal cookies, browser autofill information, desktop files, chat history, and more.

Interestingly, to get into a machine, the virus, in some cases, requires secondary malware like HawkEye or Seamless. Notably, after every bit of useful data is obtained in campaigns with Hermes and Aurora, user files are encrypted, and a ransom is requested to restore the lost data.

One of the interesting features of AZORult is that after execution, the malware is removed from the system due to the lack of a persistence mechanism.

Malware analysis of AZORult

ANY.RUN displays the execution process of AZORult in an interactive virtual environment. As shown by the sandbox simulation, the virus launches the following process during its execution:

  • Firstly, a Microsoft Office file opened, and WINWORD.EXE with enable macros is executed;
  • The malware runs EQNEDT32.EXE and downloads a malicious executable through the exploitation of the CVE-2017-11882 Microsoft Office Equation Editor vulnerability;
  • A 3.exe file is then launched, which changes the autorun value in the registry. A malicious executable file then proceeds to make changes in the registry so that the system runs it at the system start;
  • A malicious executable file launches itself and then proceeds to steal the personal data and connect to the CnC server;
  • Then, a malicious executable file starts cmd.exe to delete itself after a 3-second timeout.

The execution process of AZORult can be viewed in more detail in the video provided by ANY.RUN

azorult execution process graph

Figure 1: Illustrates the life cycle of malware. Graph generated by ANY.RUN

How to avoid infection by AZORult?

AZORult is distributed mainly using spam email campaigns or via the RIG exploit kit. Notably, a major AZORult distribution campaign was observed on July 18, 2018, targeting North America.

Spam emails that the attackers sent carried largely employment-related subjects and included an infected and password-protected resume file that triggered the download of the virus.

AZORult execution process

Below is an illustration of the execution process created by the ANY.RUN interactive malware hunting service.

azorult execution process tree

Figure 2. AZORult execution process in ANY.RUN

text report of the azorult malware analysis

Figure 3: A text report generated by ANY.RUN

AZORult stealer uses a clever technique to trick various antivirus engines. Particularly, the version of the stealer Trojan distributed in the July 2018 spam campaign was activated after unlocking a password-protected document. Since a password protected the document that was attached to the email, antiviruses had not been able to scan it and determine whether it was malicious or not. For the virus to become active, the victim had to unlock and enable macros for the document. In this particular campaign, the malware was distributed with two payloads embedded in the main binary. Both payloads were dropped to the disk and executed, with the first executable payload being the information gatherer – AZORult itself and then the secondary ransomware.

It should be noted that in aforecited ANY.RUN simulation AZORult uses an exploit when a Microsoft Office file is opened, allowing to embed several malicious OLE objects into a document and executes arbitrary code on a machine, and even download any file from a remote server and execute it.

How to share your Azorult malware analysis with others?

If you want to share your analysis with others, you can create a text report and send it to anyone you want. Just click the "Text report" button. You can save it using your browser functionality by clicking the "Save page as..." or "Print..." buttons. Note that you can choose that information section in your report you want to print or save into a file using the "Print..." button by clicking on the little printer icon on the left side of the sections. On the illustration below, the first section with a grey-colored button won't be included in the report. However, you can see a section with a black-colored printer button there.

text report for azorult Figure 4: Azorult text report

Conclusion

AZORult remains to be a hazardous trojan. The stealer Trojan has been upgraded throughout its lifespan and currently poses even more dangers than during the first days of its lifespan. Particularly, most recent versions are distributed in bundles with ransomware and can steal cryptocurrency from the victims.

Its distribution in clever email campaigns makes becoming a victim of the stealer Trojan by accident relatively easy. The interactive sandbox analysis provided by services like ANY.RUN is a great way to learn more about the threat and greatly increase cybersecurity.

IOCs

IP addresses
104.18.21.191
64.190.62.111
104.18.226.52
104.18.225.52
104.18.10.239
203.159.80.93
204.11.56.48
45.137.22.85
192.169.69.26
203.159.80.118
172.67.74.139
104.26.0.109
141.8.192.151
104.26.8.44
172.67.208.45
216.170.126.139
1.1.1.1
45.147.197.180
217.107.219.81
203.159.80.182
Hashes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booking.msg.bluhotels.com
booking.msg.bluhotels.com
192-168-100-240.otmn.direct.quickconnect.to
192-168-100-240.otmn.direct.quickconnect.to
tee4names.com
lp.cybeready.net
freegeoip.app
traderstruthrevealed.com
carmelpublications.com
zullari.com
www.duftkerzen.info
zytrox.tk
ougohoueahgoushughoej.ru
wellplayed.ug
playwell.ug
www.blinov-house.ru
miledaughter.ru
caffeinternet.it
grab-indonesia.com
pool.ug

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