What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Spectating the PUP.Optional.ThrDownloader malware detection usually means that your system is in big danger. This malware can correctly be named as ransomware – virus which encrypts your files and asks you to pay for their decryption. Stopping it requires some peculiar steps that must be taken as soon as possible.
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PUP.Optional.ThrDownloader detection is a virus detection you can spectate in your computer. It generally appears after the provoking procedures on your computer – opening the dubious email, clicking the banner in the Web or setting up the program from dubious sources. From the instance it appears, you have a short time to take action until it begins its malicious action. And be sure – it is far better not to await these destructive things.

What is PUP.Optional.ThrDownloader virus?

PUP.Optional.ThrDownloader is ransomware-type malware. It looks for the documents on your disk drive, ciphers it, and then asks you to pay the ransom for receiving the decryption key. Besides making your documents locked, this virus additionally does a lot of damage to your system. It modifies the networking settings in order to stop you from looking for the removal guides or downloading the antivirus. In rare cases, PUP.Optional.ThrDownloader can even block the setup of anti-malware programs.

PUP.Optional.ThrDownloader Summary

In summary, PUP.Optional.ThrDownloader malware actions in the infected system are next:

  • Creates RWX memory;
  • Dynamic (imported) function loading detected;
  • Authenticode signature is invalid;
  • Encrypting the files kept on the victim’s disk drive — 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-virus apps

Ransomware has actually been a major problem for the last 4 years. It is challenging to picture a more harmful virus for both individuals and businesses. The algorithms used in PUP.Optional.ThrDownloader (generally, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need more time than our galaxy actually exists, and possibly will exist. But that malware does not do all these unpleasant things immediately – it can take up to several hours to cipher all of your files. Therefore, seeing the PUP.Optional.ThrDownloader detection is a clear signal that you need to start the elimination process.

Where did I get the PUP.Optional.ThrDownloader?

Ordinary ways of PUP.Optional.ThrDownloader distribution are usual for all other ransomware variants. Those are one-day landing websites where victims are offered to download and install the free program, so-called bait e-mails and hacktools. Bait emails are a pretty new method in malware spreading – you receive the e-mail that simulates some standard notifications about deliveries or bank service conditions changes. Inside of the email, there is an infected MS Office file, or a web link which leads to the exploit landing site.

Malicious email spam

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

Avoiding it looks pretty easy, however, still requires a lot of awareness. Malware can hide in various spots, and it is better to stop it even before it goes into your PC than to rely upon an anti-malware program. Simple cybersecurity knowledge is just an important item in the modern world, even if your relationship with a computer stays on YouTube videos. That may keep you a lot of money and time which you would certainly spend while trying to find a fix guide.

PUP.Optional.ThrDownloader malware technical details

File Info:

name: F42D585AA2FCF48A604F.mlw
path: /opt/CAPEv2/storage/binaries/51e55afee37f01c179940fad63c7828d4b87c98810bfe8732ca339f21ef9ab98
crc32: 156B3E5A
md5: f42d585aa2fcf48a604f0c94c2b81b4b
sha1: 9bc82872069940c95e90a542cab3202e63288755
sha256: 51e55afee37f01c179940fad63c7828d4b87c98810bfe8732ca339f21ef9ab98
sha512: 98b75a6b45161a0b78eae3d31ff3551724cc8bd563ec3af2cadb2e8c4873c64a360990d4f8b54f51bd62ab11ad1d614645667b135df85358e5cf95081b9ac63b
ssdeep: 12288:FYAkF7EEVpldmREl+t5N7LF7WD9RWiJ0REINuLqRc5JAHqy/qMcLEi:FYAkN1Qt55F7WJRWirINejTAqMF
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T173C48D62B6E0C43BD0621B745CEFA2B2583DBF142E244D4777E41F8C5F756903A1A2AB
sha3_384: 7f98bb68e2cad044211de5e3839a5f04f3ab23865e3ca35dcbf4e3aa8d8a8fe073dc9a4aba92d8eb32ffcf5b455ede01
ep_bytes: eb1066623a432b2b484f4f4b90e98c80
timestamp: 2015-02-23 03:14:51

Version Info:

0: [No Data]

PUP.Optional.ThrDownloader also known as:

K7AntiVirusAdware ( 004c53de1 )
K7GWAdware ( 004c53de1 )
ESET-NOD32a variant of Win32/Adware.PEerMarket.G
SophosGeneric PUA JL (PUA)
EmsisoftGen:Variant.Adware.Graftor.182541 (B)
MAXmalware (ai score=60)
RisingTrojan.Generic@ML.100 (RDML:Onu99KfkWuI8py59KnzGIw)
CrowdStrikewin/malicious_confidence_100% (D)

How to remove PUP.Optional.ThrDownloader?

PUP.Optional.ThrDownloader malware is incredibly hard to erase manually. It stores its data in numerous locations throughout the disk, and can recover itself from one of the parts. Furthermore, numerous changes in the registry, networking settings and Group Policies are really hard to locate and revert to the original. It is better to make use of a special program – exactly, an anti-malware tool. GridinSoft Anti-Malware will definitely fit the most ideal for malware removal objectives.

Why GridinSoft Anti-Malware? It is pretty lightweight and has its databases updated just about every hour. Moreover, it does not have such bugs and vulnerabilities as Microsoft Defender does. The combination of these aspects makes GridinSoft Anti-Malware suitable for removing malware of any kind.

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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