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
20 October, 2020
Also known as
TrickLoader
Global rank
12
Week rank
21
Month rank
22
IOCs
2710

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
208.86.162.215
92.242.40.137
5.1.81.68
131.161.253.190
45.6.16.68
51.89.163.40
51.77.112.255
185.99.2.123
82.146.46.220
195.123.241.90
51.89.177.16
62.108.35.43
194.87.110.144
85.143.221.85
82.146.37.128
164.68.107.165
164.132.76.76
51.89.177.8
62.108.35.179
86.104.194.20
Hashes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smtp.aiotecs.com
elx01.knas.systems
youwantwork.com
zullari.com
api.zeronaught.com
content.zeronaught.com
isns.net
calvinly.com
ludea.cz
caplinked.com
wearedevs.com
measurements-api.wonderpush.com
majul.com
rodream.net
13l14z2.com
usuarionovo.com
msgsndr.com
dhktshop.com
all-turtles.com
zonamovie21.net

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