Trickbot

TrickBot is an advanced banking Trojan that attackers can use to steal payment credentials from the victims. It can redirect the victim to a fake banking cabinet and retrieve credentials typed in on the webpage.

Type
Trojan
Origin
Unknown
First seen
1 September, 2016
Last seen
15 January, 2021
Also known as
TrickLoader
Global rank
12
Week rank
20
Month rank
11
IOCs
2752

What is TrickBot malware?

TrickBot, AKA TrickLoader, is a banking Trojan – a malware designed to steal banking credentials. It is aimed at corporate and private victims and utilizes techniques such as redirection attacks. It manipulates what the victim sees in the browser and redirects to a bank cabinet webpage, forged by the hackers.

Reportedly, TrickBot has already stolen millions of dollars from banks in the United States of America, England, Australia, New Zealand, Canada, and Germany.

General description of TrickBot

The first versions of this Trojan trojan used to target mostly corporate bank accounts, in particular, aiming at a specific regional banking platform used by American banks.

The malware is thought to be created by the same team of criminals known for developing another dangerous trojan – Dyre which has been active until 2015 and reportedly successfully stolen millions of dollars for the Ryanair airline among others. Dyre rapidly stopped operating in 2015 after Russian authorities seized a group of hackers, however, this connection has never been proven definitively.

It’s speculated that some hackers from the group managed to avoid Russian authorities and came together to create Dyre's successor – TrickBot. This version is supported by the fact that TrickBot’s source code appears to be a rewrite of Dyre, albeit upgraded and refined utilizing C++ as opposed to Dyre which mostly utilized C.

Through its lifespan TrickBot trojan developers have upgraded functionality of the virus multiple times, not only adding new features and improving the banking Trojan but also changing target banks, making their attacks highly unpredictable. Among other updates, TrickBot received support for EternalBlue exploit, thus allowing it to spread over corporate networks. By August 2016 the malware gained email and browser history theft functionality and in September 2016 the virus learned to steal cryptocurrency, by interjecting the normal payment process and stealing the coins when the user fills in personal and payment information on a payment gateway, grabbing the valuable tokens and redirecting them to a wallet that belongs to the hackers.

Trickbot malware analysis

The video created by the ANY.RUN malware hunting service allows us to see the incident as it unfolds.

process graph of trickbot analysis Figure 1: TrickBot’s lifecycle diagram created in ANY.RUN

ANY.RUN is an interactive malware sandbox that not only allows to watch the simulation in a safe environment, but also control it with direct human input when necessary. In addition to video simulation, the service provides a variety of useful tools, such as comprehensive text reports.

text report of trickbot banking trojan analysis Figure 2: A text report generated by ANY.RUN

The artifacts can appear in AppData\Local\Temp and AppData\Roaming directories on a contaminated machine. In addition, the malware is sometimes downloaded to the user PC using a batch file. After achieving persistence the malware can reportedly be found in a winapp folder which is located in AppData\Roaming directory.

The virus utilizes a sophisticated method for infections which allows it to stay undetected by antivirus software. Instead of keeping configuration files locally on the user's machine, TrickBot is able to receive this data from C2 in real-time. Particularly, when a victim heads to one of the target web pages, TrickBot intersects the HTTP response of the website while sending the following information to C2:

  • A complete URL of the target bank website that the user navigates to
  • A whole HTTP query
  • HTML code of the webpage that the victim is trying to view

The C2 server then sends a new HTML markup that includes the malicious parts to the user and instead of visiting a bank account, the user ends up on a forged page.

How to avoid infection by TrickBot?

Since the virus is often distributed in Microsoft Office files, it needs macros or the editing mode in the Microsoft Office to be activated in order to enter an active phase. As long as both macros are deactivated and the editing mode is switched off, the virus will pose no danger to a PC.

Distribution of TrickBot

TrickBot trojan is distributed with malspam and phishing campaigns that are powered by the Necurs botnet, which has become extremely popular among attackers who utilize the malware-as-a-service business model.

Attackers will usually try to threaten and scare the victim in an effort to make the victim read the email and download any attached files. The Trojan itself manages to get on a victim's machine through an Excel document that contains a macro programmed to download and start the execution of the banking Trojan. However, In some of the more recent campaigns, HTML attachments have been included in the emails. Programmed to download Microsoft Office documents, the use of HTML attachments helps to avoid detection by antivirus software. What’s more, In the very last distribution campaigns, the attackers have started utilizing eFax ploys, tricking victims into clicking on VBS extensions that contain the virus.

TrickBot execution process

The given example is an analysis of the executable file that was performed using the ANY.RUN malware hunting service.

After the file was run it immediately launched the command prompt with commands to stop and delete Windows Defender as well as turn off Windows Defender Real-time Protection using PowerShell.

process tree of trickbot execution

The virus then utilized CMSTP.exe to bypass user account control and execute the same commands through an auto-elevated COM interface.

After performing the initial steps, the malware added itself to Task Scheduler, thus ensuring that it will be executed later. After a while Task Scheduler ran the malicious code which in turn started the contaminated svchost.exe processes. The svchost.exe process then started the malicious activity, launching itself and stealing credential data.

process tree of trickbot execution

How to detect Trickbot using ANY.RUN?

This malware creates files that allow to analysts say for sure that this is Trickbot. Open the "Files" tab in the lower part of the task's window and take a look at the created files. Filenames vary according to the bitness of the operating system. You can be sure this is Trickbot if you find these files and folder: systeminfo32 or systeminfo64, injectDll32 or injectDll64 and folder injectDll32_config or injectDll64_config.

files created by trickbot Figure 3: Files created by Trickbot

Conclusion

Clever attack techniques utilized by TrickBot creators make this banking Trojan extremely dangerous both to corporate and personal victims. Once infected, a general person is extremely unlikely to find out about the Trojan and identify that the bank account the user is visiting is, in fact, a forged one.

Thankfully, modern simulation services like ANY.RUN allows professionals to study the threat and deploy appropriate security measures.

IOCs

IP addresses
190.12.29.70
181.188.183.218
186.47.209.222
107.174.196.242
51.89.163.40
36.89.85.103
144.91.79.9
103.150.68.124
198.46.198.115
36.91.45.10
181.113.20.186
45.12.110.195
192.3.247.117
134.255.254.52
45.141.59.212
187.58.56.26
186.42.226.46
5.1.81.68
134.119.191.21
36.89.106.69
Hashes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majul.com
fiberglassflyrodders.info
msn.lockerdome.com
192-168-100-87.abcdefghijklmnopqrstuvwxyz012345.plex.direct
elx01.knas.systems
babel.innertrends.com
caplinked.com
wearedevs.com
api.zeronaught.com
content.zeronaught.com
isns.net
checkoutspace.com
geo.ngtv.io
measurements-api.wonderpush.com
smtp.aiotecs.com
zullari.com
youwantwork.com
krupskaya.com
m-onetrading-jp.com
thuocnam.tk

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