Trojan:MSIL/SmallDownloader!MTB

Written by Robert Bailey

What is Trojan:MSIL/SmallDownloader!MTB infection?

In this article you will find regarding the interpretation of Trojan:MSIL/SmallDownloader!MTB and also its adverse influence on your computer system. Such ransomware are a kind of malware that is specified by on the internet fraudulences to demand paying the ransom by a target.

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In the majority of the situations, Trojan:MSIL/SmallDownloader!MTB ransomware will advise its targets to launch funds transfer for the function of neutralizing the changes that the Trojan infection has presented to the victim’s device.

Trojan:MSIL/SmallDownloader!MTB Summary

These modifications can be as adheres to:

  • Executable code extraction;
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Possible date expiration check, exits too soon after checking local time;
  • Creates RWX memory;
  • A process attempted to delay the analysis task.;
  • Attempts to connect to a dead IP:Port (19 unique times);
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • Starts servers listening on 127.0.0.1:0;
  • Expresses interest in specific running processes;
  • Reads data out of its own binary image;
  • A process created a hidden window;
  • Drops a binary and executes it;
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • Looks up the external IP address;
  • A scripting utility was executed;
  • Uses Windows utilities for basic functionality;
  • Detects Sandboxie through the presence of a library;
  • Detects Avast Antivirus through the presence of a library;
  • Executed a process and injected code into it, probably while unpacking;
  • Checks for the presence of known windows from debuggers and forensic tools;
  • Steals private information from local Internet browsers;
  • Network activity contains more than one unique useragent.;
  • Exhibits behavior characteristic of Nymaim malware;
  • The following process appear to have been packed with Themida: enzA4k0mElzVCTY61zCQsuQd.exe, YrgHjA6H7lHBBp2hGqXfexpz.exe, jUfX0nH_DN3HUQ1w0kZ5z7XL.exe, UF1bczi2w4UlePc6FRp76SxQ.exe, 97422423542.exe, EuVe6vYVJ6MGgR1p_e8Bxzcp.exe, PzBPJBoOJZIdH9L_Ly1FTiAr.exe, 210921.exe, 3Z8sKqB0FAhnGwHCP6nP8NyS.exe;
  • Installs itself for autorun at Windows startup;
  • Exhibits possible ransomware file modification behavior;
  • Creates a hidden or system file;
  • Likely virus infection of existing system binary;
  • Checks the version of Bios, possibly for anti-virtualization;
  • Detects VirtualBox through the presence of a registry key;
  • Attempts to modify proxy settings;
  • Attempts to disable Windows Defender;
  • Attempts to create or modify system certificates;
  • Collects information to fingerprint the system;
  • Anomalous binary characteristics;
  • Ciphering the documents found on the target’s hard disk drive — so the victim can no longer make use of the data;
  • Preventing routine accessibility to the target’s workstation;

Related domains:

z.whorecord.xyz HEUR:Trojan-Ransom.Win32.Blocker.gen
sornx.xyz HEUR:Trojan-Ransom.Win32.Blocker.gen
a.tomx.xyz HEUR:Trojan-Ransom.Win32.Blocker.gen
wfsdragon.ru HEUR:Trojan-Ransom.Win32.Blocker.gen
cdn.discordapp.com HEUR:Trojan-Ransom.Win32.Blocker.gen
ocsp.digicert.com HEUR:Trojan-Ransom.Win32.Blocker.gen
ipinfo.io HEUR:Trojan-Ransom.Win32.Blocker.gen
live.goatgame.live HEUR:Trojan-Ransom.Win32.Blocker.gen
lenak513.tumblr.com HEUR:Trojan-Ransom.Win32.Blocker.gen
www.marketingonline.com HEUR:Trojan-Ransom.Win32.Blocker.gen
www.dhonr.com HEUR:Trojan-Ransom.Win32.Blocker.gen
privacy-toolz-for-you-403.top HEUR:Trojan-Ransom.Win32.Blocker.gen
installcub.online HEUR:Trojan-Ransom.Win32.Blocker.gen
ocsp.comodoca.com HEUR:Trojan-Ransom.Win32.Blocker.gen
ocsp.usertrust.com HEUR:Trojan-Ransom.Win32.Blocker.gen
iplis.ru HEUR:Trojan-Ransom.Win32.Blocker.gen
ocsp.sectigo.com HEUR:Trojan-Ransom.Win32.Blocker.gen
apps.identrust.com HEUR:Trojan-Ransom.Win32.Blocker.gen
telegram.org HEUR:Trojan-Ransom.Win32.Blocker.gen
twitter.com HEUR:Trojan-Ransom.Win32.Blocker.gen
yandex.ru HEUR:Trojan-Ransom.Win32.Blocker.gen
cleaner-partners.ltd HEUR:Trojan-Ransom.Win32.Blocker.gen
www.listincode.com HEUR:Trojan-Ransom.Win32.Blocker.gen
crl3.digicert.com HEUR:Trojan-Ransom.Win32.Blocker.gen
statuse.digitalcertvalidation.com HEUR:Trojan-Ransom.Win32.Blocker.gen
mas.to HEUR:Trojan-Ransom.Win32.Blocker.gen
www.public-trust.com HEUR:Trojan-Ransom.Win32.Blocker.gen
zukutu02.top HEUR:Trojan-Ransom.Win32.Blocker.gen
iplogger.org HEUR:Trojan-Ransom.Win32.Blocker.gen
sliderfriday.top HEUR:Trojan-Ransom.Win32.Blocker.gen

Trojan:MSIL/SmallDownloader!MTB

The most common networks through which Trojan:MSIL/SmallDownloader!MTB Ransomware Trojans are infused are:

  • By means of phishing emails;
  • As a repercussion of individual winding up on a source that organizes a harmful software program;

As soon as the Trojan is efficiently infused, it will certainly either cipher the data on the target’s PC or protect against the gadget from working in a correct manner – while also placing a ransom money note that states the demand for the victims to impact the repayment for the function of decrypting the files or bring back the data system back to the preliminary problem. In a lot of circumstances, the ransom note will certainly come up when the customer reboots the PC after the system has actually currently been harmed.

Trojan:MSIL/SmallDownloader!MTB circulation networks.

In various corners of the globe, Trojan:MSIL/SmallDownloader!MTB grows by leaps and also bounds. Nevertheless, the ransom notes as well as methods of obtaining the ransom quantity may differ depending on specific local (local) setups. The ransom notes as well as methods of extorting the ransom amount might differ depending on particular neighborhood (local) settings.

Ransomware injection

For instance:

    Faulty informs concerning unlicensed software application.

    In particular areas, the Trojans frequently wrongfully report having discovered some unlicensed applications allowed on the sufferer’s device. The sharp after that requires the user to pay the ransom money.

    Faulty statements concerning unlawful web content.

    In countries where software piracy is less preferred, this method is not as reliable for the cyber fraudulences. Alternatively, the Trojan:MSIL/SmallDownloader!MTB popup alert may wrongly declare to be stemming from a law enforcement institution and will report having located kid pornography or various other unlawful information on the tool.

    Trojan:MSIL/SmallDownloader!MTB popup alert may wrongly assert to be deriving from a regulation enforcement establishment and will report having located child porn or other illegal information on the gadget. The alert will likewise contain a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: BB404626
md5: 5de7dbf9e21b25396dad54a1c30d19e8
name: 5DE7DBF9E21B25396DAD54A1C30D19E8.mlw
sha1: dcf97fa33c63b6ca6653f75406172d6334e46746
sha256: 2b97860afd98dff5bed238e2a2ce25977b50ba5356333c502b8b1c61f8a73bec
sha512: 1cb572ad084722d23ea2b8945f36aaac132ec4c0dba6ada097bfd6f05a3eb1b55039506090bcf67d6cba995c01d48c074a5ab75632e7402eb32718d1b59ef962
ssdeep: 98304:yEm1+0ZHlyeUASCQPF8YO/UFbDGoQRHb84hBy/udE:yEm1HZH9UArQP5SMbDGB77hBHu
type: PE32 executable (GUI) Intel 80386, for MS Windows, Nullsoft Installer self-extracting archive

Version Info:

0: [No Data]

Trojan:MSIL/SmallDownloader!MTB also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader41.14601
ClamAV Win.Packed.Barys-9859531-0
CAT-QuickHeal Trojan.Arkeistealer
ALYac Dropped:Trojan.GenericKDZ.77157
Malwarebytes Trojan.Dropper.SFX.Generic
Alibaba Backdoor:Win32/Fabookie.46760c91
Cybereason malicious.33c63b
Cyren W32/Agent.DHO.gen!Eldorado
Symantec Trojan.Gen.MBT
ESET-NOD32 multiple detections
APEX Malicious
Avast Win32:TrojanX-gen [Trj]
Cynet Malicious (score: 100)
Kaspersky Trojan.Win32.Fabookie.we
BitDefender Dropped:Trojan.GenericKDZ.77157
NANO-Antivirus Trojan.Win32.Blocker.iyujxz
MicroWorld-eScan Dropped:Trojan.GenericKDZ.77157
Tencent Win32.Trojan.Sdum.Tazf
Sophos Mal/Generic-R
BitDefenderTheta Gen:NN.ZedlaF.34126.n88baOE@FOp
TrendMicro TROJ_GEN.R002C0WHL21
McAfee-GW-Edition BehavesLike.Win32.Lockbit.wc
FireEye Generic.mg.5de7dbf9e21b2539
Emsisoft Dropped:Trojan.GenericKDZ.77157 (B)
SentinelOne Static AI – Suspicious PE
Avira HEUR/AGEN.1144141
Antiy-AVL Trojan/Generic.ASMalwS.346BD97
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:MSIL/SmallDownloader!MTB
Gridinsoft Trojan.Win32.Dropper.ko!s5
ZoneAlarm HEUR:Trojan-Ransom.Win32.Blocker.gen
GData Dropped:Trojan.GenericKDZ.77157
AhnLab-V3 Dropper/Win.MulDrop.R439720
McAfee Artemis!5DE7DBF9E21B
MAX malware (ai score=82)
VBA32 Trojan.ArkeiStealer
Rising Dropper.Agent/NSIS!1.D805 (CLASSIC:EOn53gSYEp6OLgtRv7xRUw)
Fortinet W32/BSE.4Q7Q!tr
AVG Win32:TrojanX-gen [Trj]
Paloalto generic.ml

How to remove Trojan:MSIL/SmallDownloader!MTB virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

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 Trojan:MSIL/SmallDownloader!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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Trojan:MSIL/SmallDownloader!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: http://gridinsoft.com/products/

About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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