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
30 September, 2020
Also known as
PuffStealer
Rultazo
Global rank
10
Week rank
17
Month rank
13
IOCs
12386

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
162.251.85.146
104.26.8.44
104.18.225.52
198.50.160.198
104.18.21.191
104.18.226.52
204.11.56.48
172.67.218.84
198.54.117.197
87.236.16.34
104.18.10.239
198.54.126.17
198.54.126.17
103.247.10.55
172.67.69.226
104.26.9.44
185.50.196.212
81.177.139.61
103.211.216.223
148.163.124.15
Hashes
f047a8a06621d02d68b63219b9ead4951e7a9621faa03daff2be0b15ef52fd51
82c8a44361572fa83ea222631ae1a8b71f9d6747e1e2b711ddd45b5b7240ae7a
ce71ccaa67a6a21a110cc99da99da0e7595a392fe54cead5685dbf706e3c9d05
e6c0c8c9d144766750f74edaff63cf923e2c87dbeb17fe7e33e7caff28c4cb63
da6d45fd39478c021900718f516197ec10fca556936a3960e13e787bdda1b5ea
c716ec2af0a6a3163a1bb7217f45ff1a57768443ce900c883dbee49ca80012e1
9caaeaf942737bb0e63b29a053b310845e62dce3fb1041d48904eb16b2fb2d07
80a6e67c230f2f2bad5815d0ead68bb209575960b623ae7fc9952981132656d1
063d6bde3c00bf387480ac405144ee547ad2d08fb90d5be34d0fe6e0a1206c8a
d4d22a42f8307b64ffeeaa26275000213a940c1792231db0911678d7bbb2cfb9
529455f4bbe280c169487018cbe4f7f6d167f348f99f5d8012f7bd1cd20ac667
ede4a3065bf86d3c92312a291f9776c231f728a32d59dcb1621bee320855ad9f
483d3d13ca3a8f7a143938aacd771681f0ae895f95d1d8d7c70db06bb60386ba
6452ad3a65fcef75b9afc6cda02bd3f7b01a6319a0bfbf4d5e4ef89f2a99bbfd
522b806da4fde4eff749769bcf817ce445c171c561219d296845707bdce294fb
19dc42eb59f97404751250dd13f4475996f596f2cc00fea02788efc378ae14fe
6876aa707adeeffbe08d86d26c6cf48b8d77d46c96f8ace28a523b0a846db38f
fed92d9b3fcae80d6f05346afdc22afdf4d656022f6d25a763a3c8c329cf41c4
875158091605f31c526784e1d32823d74aa2beadbb780fbacce87e3e94ab9c18
d5dc701bcb7083acf20f3aea9e0c70ddda9ac9dc3eb66fd5a218547f37b5a240
Domains
sskyokker256.bit.md-89.webhostbox.net
thepalaceonwheels.com
coloursmedia.co.in
greenworldlogistics.com
sissta.org
netgreater.com
mail.com.md-89.webhostbox.net
arisebyvnp.com
s888300.bit.md-89.webhostbox.net
it.pcviruscare.com
lysyfyj.com
books.myscriptcase.com
onzcda.com
htsmx.net
89gospel.com
12065.bodis.com
www.decenthat.com
myleftheart.com
anthropologydentist.website
ns1.anthropologydentist.website

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