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
17 April, 2021
Also known as
PuffStealer
Rultazo
Global rank
11
Week rank
14
Month rank
15
IOCs
15012

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 as well as to 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 that 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, In campaigns with Hermes and Aurora, after every bit of useful data is obtained 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 were sent by the attackers 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, version of the stealer Trojan distributed in July 2018 spam campaign was activated after unlocking a password-protected document. Since the document that was attached to the email was protected by a password, 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 a number of 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 to, just click the "Text report" button. You can save it using your browser functionality either by clicking "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 but a section with a black colored printer button will be.

text report for azorult Figure 4: Azorult text report

Conclusion

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

Its distribution in clever email campaigns makes becoming a victim of the stealer Trojan by accident relatively easy. 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
35.205.61.67
104.18.21.191
198.54.115.24
104.18.10.239
104.18.226.52
185.53.179.7
204.11.56.48
104.18.225.52
185.177.93.149
198.54.117.197
104.26.9.44
103.21.59.27
103.224.212.222
37.48.65.151
74.124.202.50
104.243.44.52
92.63.192.57
69.172.200.235
141.8.192.58
64.136.20.67
Hashes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www.tubeknows.com
cuidedopequenonegocio.com.br
googme.com
wearedevs.com
buterin-vitalik.fun
foma-gmail.com
4-scan-andrew.foma-gmail.com
softwarefantasy.com
nihamatioto.com
31-scan-andrew.foma-gmail.com
sam-latrilogie.com
pio-data2.info
eafoaeufouaehofuhap.ru
dekhan.info
ireadfaq.com
dyc5m6xx36kxj.net
freebiegalore.com
ping.mysuperstocks.com
www.srjtbjs.com
eco51b9e2888.911.ozvision.ozsn.net

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