What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Seeing the MSIL/TrojanDownloader.Agent.GCB detection name usually means that your PC is in big danger. This virus can correctly be identified as ransomware – type of malware which ciphers your files and asks you to pay for their decryption. Removing it requires some unusual steps that must be done as soon as possible.
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MSIL/TrojanDownloader.Agent.GCB detection is a malware detection you can spectate in your system. It often shows up after the preliminary procedures on your computer – opening the suspicious e-mail messages, clicking the advertisement in the Web or setting up the program from unreliable resources. From the second it shows up, you have a short time to act until it begins its destructive action. And be sure – it is better not to wait for these malicious things.

What is MSIL/TrojanDownloader.Agent.GCB virus?

MSIL/TrojanDownloader.Agent.GCB is ransomware-type malware. It searches for the documents on your disk drive, ciphers it, and then asks you to pay the ransom for getting the decryption key. Besides making your files locked, this virus additionally does a lot of damage to your system. It alters the networking setups in order to avoid you from reading the removal tutorials or downloading the anti-malware program. In some cases, MSIL/TrojanDownloader.Agent.GCB can even prevent the launching of anti-malware programs.

MSIL/TrojanDownloader.Agent.GCB Summary

In summary, MSIL/TrojanDownloader.Agent.GCB ransomware actions in the infected PC are next:

  • Dynamic (imported) function loading detected;
  • CAPE extracted potentially suspicious content;
  • Authenticode signature is invalid;
  • Binary compilation timestomping detected;
  • Ciphering the files kept on the target’s disks — so the victim cannot open these documents;
  • Blocking the launching of .exe files of anti-virus apps
  • Blocking the launching of installation files of anti-malware apps

Ransomware has actually been a nightmare for the last 4 years. It is difficult to picture a more damaging virus for both individuals and corporations. The algorithms used in MSIL/TrojanDownloader.Agent.GCB (generally, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have more time than our galaxy actually exists, and possibly will exist. But that malware does not do all these terrible things instantly – it may take up to several hours to cipher all of your files. Thus, seeing the MSIL/TrojanDownloader.Agent.GCB detection is a clear signal that you should start the clearing procedure.

Where did I get the MSIL/TrojanDownloader.Agent.GCB?

Common ways of MSIL/TrojanDownloader.Agent.GCB injection are usual for all other ransomware variants. Those are one-day landing websites where victims are offered to download the free software, so-called bait e-mails and hacktools. Bait e-mails are a quite modern strategy in malware distribution – you receive the e-mail that imitates some normal notifications about shippings or bank service conditions updates. Within the email, there is an infected MS Office file, or a link which leads to the exploit landing site.

Malicious email spam

Malicious email message. This one tricks you to open the phishing website.

Preventing it looks quite simple, however, still requires a lot of focus. Malware can hide in different spots, and it is far better to prevent it even before it goes into your computer than to rely upon an anti-malware program. Essential cybersecurity knowledge is just an essential thing in the modern-day world, even if your interaction with a computer stays on YouTube videos. That can keep you a lot of time and money which you would spend while looking for a solution.

MSIL/TrojanDownloader.Agent.GCB malware technical details

File Info:

name: 02D2CF67897FE9007C5D.mlw
path: /opt/CAPEv2/storage/binaries/e1319ddd95e859d79be6202c98e8be5ab0ec34de2911ece3c40074ff97d8ed82
crc32: 7DC45684
md5: 02d2cf67897fe9007c5de2f167058d9b
sha1: 6f846fe4ec2be32b4532b521d1ec0a2cad8a4b24
sha256: e1319ddd95e859d79be6202c98e8be5ab0ec34de2911ece3c40074ff97d8ed82
sha512: 0e39c42bbf2b85bc810a6ad0f9fbce3cc49a35aba028614010a809940fbe63b26777460d3becd3cdb12976a59b7b7647a566bf374d6637276fd7fb1e275500a6
ssdeep: 384:PeOMIlbfzcIXdfd0bZ+dzcM0cw6U/bzqfndO6XvKyNY0RptYcFwVc03K:PeOMIlbfzcIXdfd0bZ+dzcM0cw7b+lZx
type: PE32 executable (console) Intel 80386, for MS Windows
tlsh: T16A62A60137E40335F3F7AB752CF996048B3AB65BA822CA2D384C464E1FB6605D663B75
sha3_384: 110e6d8fa293bb2323f2b36cf15e077aec209cd7164c70f20aaffa0888c265202ecf8c741a25236ace18163e36c61a45
ep_bytes: ff250020400000000000000000000000
timestamp: 2044-01-03 04:39:48

Version Info:

Translation: 0x0000 0x04b0
CompanyName: Nemesis-45777
FileDescription: Spoofer menu test
InternalName: Spoofer menu test.exe
LegalCopyright: Copyright © Nemesis-45777 2020
OriginalFilename: Spoofer menu test.exe
ProductName: Spoofer menu test
Assembly Version:

MSIL/TrojanDownloader.Agent.GCB also known as:

K7AntiVirusTrojan-Downloader ( 00563ba11 )
K7GWTrojan-Downloader ( 00563ba11 )
Elasticmalicious (high confidence)
ESET-NOD32a variant of MSIL/TrojanDownloader.Agent.GCB
AvastWin32:TrojanX-gen [Trj]
EmsisoftGen:Variant.Bulz.310222 (B)
MAXmalware (ai score=84)
CynetMalicious (score: 100)
RisingTrojan.Generic/MSIL@AI.100 (RDM.MSIL:kGWnm+yD+8DxYeL559jqrA)
SentinelOneStatic AI – Suspicious PE
AVGWin32:TrojanX-gen [Trj]
CrowdStrikewin/malicious_confidence_100% (W)

How to remove MSIL/TrojanDownloader.Agent.GCB?

MSIL/TrojanDownloader.Agent.GCB malware is extremely hard to delete manually. It places its documents in a variety of places throughout the disk, and can recover itself from one of the elements. Moreover, a lot of modifications in the windows registry, networking setups and also Group Policies are really hard to identify and change to the initial. It is much better to make use of a specific app – exactly, an anti-malware tool. GridinSoft Anti-Malware will definitely fit the best for malware removal objectives.

Why GridinSoft Anti-Malware? It is very light-weight and has its databases updated nearly every hour. Moreover, it does not have such problems and exploits as Microsoft Defender does. The combination of these details makes GridinSoft Anti-Malware perfect for getting rid of malware of any form.

Remove the viruses with GridinSoft Anti-Malware

  • Download and install GridinSoft Anti-Malware. After the installation, you will be offered to perform the Standard Scan. Approve this action.
  • Gridinsoft Anti-Malware during the scan process

  • Standard scan checks the logical disk where the system files are stored, together with the files of programs you have already installed. The scan lasts up to 6 minutes.
  • GridinSoft Anti-Malware scan results

  • When the scan is over, you may choose the action for each detected virus. For all files of [SHORT_NAME] the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning
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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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