Backdoor:MSIL/Nanocore.S!MTB

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Backdoor:MSIL/Nanocore.S!MTB infection?

In this article you will discover concerning the interpretation of Backdoor:MSIL/Nanocore.S!MTB and also its unfavorable influence on your computer. Such ransomware are a kind of malware that is elaborated by on the internet scams to require paying the ransom money by a target.

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In the majority of the instances, Backdoor:MSIL/Nanocore.S!MTB ransomware will certainly instruct its targets to launch funds move for the function of counteracting the amendments that the Trojan infection has presented to the sufferer’s tool.

Backdoor:MSIL/Nanocore.S!MTB Summary

These alterations can be as follows:

  • Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Injection with CreateRemoteThread in a remote process;
  • Creates RWX memory. There is a security trick with memory regions that allows an attacker to fill a buffer with a shellcode and then execute it. Filling a buffer with shellcode isn’t a big deal, it’s just data. The problem arises when the attacker is able to control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow, and then changing the flow of execution by assigning this pointer to the address of the shellcode.
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • A process created a hidden window;
  • Uses Windows utilities for basic functionality;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Executed a process and injected code into it, probably while unpacking;
  • A process was set to shut the system down when terminated;
  • Installs itself for autorun at Windows startup. There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup. Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Exhibits behavior characteristic of Nanocore RAT;
  • Creates a copy of itself;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Ciphering the documents situated on the sufferer’s hard disk — so the sufferer can no longer use the information;
  • Preventing normal accessibility to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Backdoor:MSIL/Nanocore.S!MTB

One of the most regular networks whereby Backdoor:MSIL/Nanocore.S!MTB Ransomware Trojans are infused are:

  • By ways of phishing emails;
  • As a repercussion of individual winding up on a resource that organizes a malicious software;

As quickly as the Trojan is efficiently injected, it will either cipher the data on the victim’s computer or avoid the device from functioning in a proper way – while also positioning a ransom note that points out the demand for the victims to impact the settlement for the purpose of decrypting the papers or recovering the data system back to the preliminary condition. In the majority of instances, the ransom note will certainly come up when the customer restarts the PC after the system has currently been damaged.

Backdoor:MSIL/Nanocore.S!MTB distribution networks.

In different corners of the world, Backdoor:MSIL/Nanocore.S!MTB expands by leaps and also bounds. Nonetheless, the ransom money notes as well as tricks of extorting the ransom quantity might differ depending upon specific regional (regional) setups. The ransom money notes and techniques of extorting the ransom amount might vary depending on particular neighborhood (regional) settings.

Ransomware injection

For example:

    Faulty signals about unlicensed software application.

    In particular locations, the Trojans typically wrongfully report having actually spotted some unlicensed applications enabled on the target’s gadget. The sharp after that demands the individual to pay the ransom.

    Faulty statements about illegal content.

    In nations where software piracy is less preferred, this technique is not as efficient for the cyber scams. Alternatively, the Backdoor:MSIL/Nanocore.S!MTB popup alert may wrongly declare to be originating from a police establishment and will report having situated kid pornography or other unlawful information on the device.

    Backdoor:MSIL/Nanocore.S!MTB popup alert may incorrectly declare to be obtaining from a regulation enforcement organization as well as will report having located kid porn or various other illegal data on the gadget. The alert will in a similar way consist of a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: 241FCAB7
md5: 544371622390ddf3cdb85274d63e3634
name: 544371622390DDF3CDB85274D63E3634.mlw
sha1: d65c2ceffdba140777e83e0aeeae737e8ad2df76
sha256: c6295c790caf10e207a90fbe29ca55989a790c5fc9359b7b5869d31fb021ad3b
sha512: eba9b0e8775fdf8c966cc7b954ab2771047fd6e14977290f93ad8c4df5fb009e453c78e65616e4a3f21e83b04f45e8641a1410994b4ddd1c5d8d7c9dfa4f013c
ssdeep: 12288:YcRGy1rWpTTUspXGhqJElhIqDixZ/i6FZ+85OQKbN7rIGy3sU/W3W+PUWqnDon:sy5Gm6ToYd/CqnDon
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: second
Assembly Version: 1.0.0.0
InternalName: Second.exe
FileVersion: 1.0.0.0
CompanyName: second
LegalTrademarks: second
Comments: second
ProductName: second
ProductVersion: 1.0.0.0
FileDescription: second
OriginalFilename: Second.exe

Backdoor:MSIL/Nanocore.S!MTB also known as:

GridinSoftTrojan.Ransom.Gen
K7AntiVirusTrojan ( 004be6171 )
Elasticmalicious (high confidence)
DrWebBackDoor.Comet.2020
CynetMalicious (score: 100)
ALYacGen:Variant.Ransom.Samas.9
CylanceUnsafe
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_100% (D)
K7GWTrojan ( 004be6171 )
Cybereasonmalicious.22390d
ESET-NOD32a variant of MSIL/Injector.ERL
APEXMalicious
AvastMSIL:GenMalicious-ARE [Trj]
KasperskyHEUR:Trojan.MSIL.Generic
BitDefenderGen:Variant.Ransom.Samas.9
NANO-AntivirusTrojan.Win32.Comet.dzuyac
MicroWorld-eScanGen:Variant.Ransom.Samas.9
Ad-AwareGen:Variant.Ransom.Samas.9
SophosML/PE-A + Troj/MSIL-EGP
F-SecureTrojan.TR/Dropper.Gen
BitDefenderThetaGen:NN.ZemsilF.34608.Mm0@auI!rNd
McAfee-GW-EditionBehavesLike.Win32.Generic.jz
FireEyeGeneric.mg.544371622390ddf3
EmsisoftGen:Variant.Ransom.Samas.9 (B)
SentinelOneStatic AI – Malicious PE
AviraTR/Dropper.Gen
eGambitUnsafe.AI_Score_94%
MicrosoftBackdoor:MSIL/Nanocore.S!MTB
ArcabitTrojan.Ransom.Samas.9
ZoneAlarmHEUR:Trojan.MSIL.Generic
GDataGen:Variant.Ransom.Samas.9
AhnLab-V3Trojan/Win32.Dynamer.C975481
McAfeeTrojan-FJIS!544371622390
MAXmalware (ai score=82)
MalwarebytesMalware.AI.4091201883
RisingBackdoor.Fynloski!8.1FD (TFE:dGZlOgzURxRUsCB0rg)
IkarusTrojan.MSIL.Injector
FortinetMSIL/Generic.AP.188AB0C!tr
AVGMSIL:GenMalicious-ARE [Trj]
Qihoo-360HEUR/QVM03.0.DA53.Malware.Gen

How to remove Backdoor:MSIL/Nanocore.S!MTB virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

Run the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

Run Setup.exe

An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.

GridinSoft Anti-Malware Setup

Press “Install” button.

GridinSoft Anti-Malware Install

Once installed, Anti-Malware will automatically run.

GridinSoft Anti-Malware Splash-Screen

Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for Backdoor:MSIL/Nanocore.S!MTB files and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.

GridinSoft Anti-Malware Scanning

Click on “Clean Now”.

When the scan has finished, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

GridinSoft Anti-Malware will scan and clean your PC for free in the trial period. The free version offer real-time protection for first 2 days. If you want to be fully protected at all times – I can recommended you to purchase a full version:

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If the guide doesn’t help you to remove Backdoor:MSIL/Nanocore.S!MTB you can always ask me in the comments for getting help.

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/comparison

About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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