Written by Robert Bailey

What is PUP.Optional.ExtensionInstaller infection?

In this short article you will discover concerning the definition of PUP.Optional.ExtensionInstaller and its unfavorable influence on your computer system. Such ransomware are a kind of malware that is elaborated by on-line frauds to require paying the ransom money by a sufferer.

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It is better to prevent, than repair and repent!

When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
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In the majority of the cases, PUP.Optional.ExtensionInstaller ransomware will certainly advise its targets to initiate funds transfer for the purpose of reducing the effects of the modifications that the Trojan infection has presented to the target’s gadget.

PUP.Optional.ExtensionInstaller Summary

These alterations can be as adheres to:

  • A process attempted to delay the analysis task.;
  • Reads data out of its own binary image;
  • Drops a binary and executes it;
  • Network activity detected but not expressed in API logs;
  • Anomalous binary characteristics;
  • Ciphering the files found on the target’s disk drive — so the target can no more make use of the information;
  • Preventing regular access to the sufferer’s workstation;

Related domains:

z.whorecord.xyz Ransom:Win32/StopCrypt!ml
a.tomx.xyz Ransom:Win32/StopCrypt!ml


One of the most normal channels where PUP.Optional.ExtensionInstaller are infused are:

  • By ways of phishing e-mails;
  • As a repercussion of customer ending up on a resource that organizes a malicious software program;

As soon as the Trojan is efficiently infused, it will certainly either cipher the information on the victim’s PC or prevent the gadget from functioning in an appropriate fashion – while also positioning a ransom note that points out the need for the targets to effect the repayment for the objective of decrypting the files or bring back the file system back to the preliminary condition. In the majority of instances, the ransom money note will certainly turn up when the client restarts the COMPUTER after the system has actually already been harmed.

PUP.Optional.ExtensionInstaller distribution channels.

In different corners of the globe, PUP.Optional.ExtensionInstaller grows by leaps and also bounds. Nevertheless, the ransom notes and techniques of extorting the ransom quantity might vary depending upon particular neighborhood (local) settings. The ransom money notes and also methods of extorting the ransom money amount might vary depending on certain local (regional) setups.

Ransomware injection

As an example:

    Faulty informs regarding unlicensed software.

    In specific locations, the Trojans typically wrongfully report having actually found some unlicensed applications made it possible for on the victim’s device. The alert then requires the user to pay the ransom.

    Faulty statements concerning unlawful material.

    In nations where software piracy is much less prominent, this technique is not as efficient for the cyber fraudulences. Additionally, the PUP.Optional.ExtensionInstaller popup alert might falsely declare to be stemming from a law enforcement institution and also will certainly report having situated youngster porn or various other illegal data on the gadget.

    PUP.Optional.ExtensionInstaller popup alert may falsely assert to be acquiring from a law enforcement organization and will report having situated child pornography or various other illegal data on the device. The alert will similarly have a requirement for the customer to pay the ransom.

Technical details

File Info:

crc32: BC189C17
md5: 5b9a29ce81bd15c850f931a3b96a4f36
name: 5B9A29CE81BD15C850F931A3B96A4F36.mlw
sha1: 8fff5695132a42d73bb98b2bea44a2874fa4dfd4
sha256: 2df040f0eb71acf8d02e783def03191387eacb70f43a8048e1b8e2c672914b9c
sha512: 29a5a75d9b492f9814aa43a4baba98548bc602e6f436be08ca0b8f2432aaa44887eb6a06cbb6bb462cd713159d27210c55382792bd2725c2755dcb3fd47ff6d1
ssdeep: 12288:dq/JY0TTiF9j49cDLrV9MiEd9Wjhtma+rZJ/VYlsKCEd9Wjhtma+rZJ/VYlsKCr:ey14ALrVGyhT+HGuKJyhT+HGuK0
type: PE32 executable (GUI) Intel 80386, for MS Windows, Nullsoft Installer self-extracting archive

Version Info:

LegalCopyright: Qwc
FileDescription: Zpp
Translation: 0x0409 0x04b0

PUP.Optional.ExtensionInstaller also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 005212511 )
Lionic Trojan.Win32.Generic.4!c
Elastic malicious (high confidence)
Cynet Malicious (score: 100)
ALYac Dropped:Trojan.Generic.22766687
K7GW Trojan ( 005212511 )
Cybereason malicious.e81bd1
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/SearchPage.B
APEX Malicious
Avast Win32:Malware-gen
BitDefender Dropped:Trojan.Generic.22766687
NANO-Antivirus Trojan.Win32.SearchPage.ewxwwo
MicroWorld-eScan Dropped:Trojan.Generic.22766687
Tencent Win32.Trojan.Generic.Syik
Ad-Aware Dropped:Trojan.Generic.22766687
Sophos Mal/Generic-S
Comodo Malware@#ndwbyb7m7via
BitDefenderTheta Gen:NN.ZexaF.34170.PC0@aGq0@Tdi
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.ICLoader.jc
FireEye Generic.mg.5b9a29ce81bd15c8
Emsisoft Dropped:Trojan.Generic.22766687 (B)
SentinelOne Static AI – Malicious PE
Avira HEUR/AGEN.1117983
Microsoft Ransom:Win32/StopCrypt!ml
GData Dropped:Trojan.Generic.22766687
McAfee Artemis!5B9A29CE81BD
MAX malware (ai score=80)
Malwarebytes PUP.Optional.ExtensionInstaller
Panda Trj/CI.A
Rising Trojan.Generic@ML.86 (RDML:7povfAkN8U/YLvxffBUYpQ)
Yandex Trojan.SearchPage!fNeOPDNAXVw
Fortinet W32/SearchPage.B!tr
AVG Win32:Malware-gen
Paloalto generic.ml

How to remove PUP.Optional.ExtensionInstaller ransomware?

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 PUP.Optional.ExtensionInstaller 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 PUP.Optional.ExtensionInstaller you can always ask me in the comments for getting help.

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  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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