Remove Ostap

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The Ostap (in addition to that referred to as Ostap malicious software) downloader is a JavaScript-based infection that was freshly accustomed in mixture alongside the TrickBot parasite. The objective of the downloader is to consider the contaminated operating system and bypass anti-a malware program unnoticed. If those two functions are done without any difficulties, the Ostap (in addition referred to as Ostap malware) downloader may move on to link a remote command server, fetch the payload, and deploy it to the threatened host. So far, the Ostap downloader has been utilized exclusively along with the TrickBot Trojan, but it’s possible that it shall be employed to power other malignant campaigns from here on.

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Ostap’s Authors Turn to JavaScript

Often, cybercriminals rely on basic downloaders that make use of PowerShell commands and obfuscated VBA (Visual Basic for Applications) scripts. However, Ostap is numerous since it’s explained fully in JavaScript. Along with this, the obfuscation methods employed by its creators are spectacular, to say the least – some of the located samples contained over 36,000 lines of rubbish code that is aimed to bewilder automated script inspection instruments. Researching the code using the manual method can be quite complicated as well, because just a dozen of these kinds of lines of code problem, despite the fact that the rest are either worthless or are employed to obfuscate the crucial elements of the script.

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TrickBot is Ostap’s #1 Payload Currently

The campaign involving Ostap and TrickBot relies on phishing emails that are disguised as a purchase notice, and carry a ‘.DOCM’ attachment in other words loaded with a dangerous macro-script. When the catalog is started, it will set off the code that tries to initiate the JavaScript catalog holding the Ostap downloader. The downloader shall not straightaway get to run and, instead, it shall at the beginning run necessary computer reviews to assure that it isn’t being operate in a sandbox environment. Thanks to the obfuscation frauds employed by the Ostap’s creators, the downloader sounds to be capable of avoiding minimal antivirus program an application with ease.

The category of documents employed to spread the Ostap downloader reroutes specialists to think that the attackers’ initial targets could be retailers and commercial businesses. It’s advisable to assure the safety of your devices by implementing a good and continually up-to-date anti-malware utility utility.


Manual Ostap Removal Instructions.

Delete Ostap related applications

Uninstall from Windows 7 and Windows Vista

  1. Click Start and go to Control Panel.
  2. Choose Uninstall a program and uninstall Ostap.

Uninstall from Windows XP

  1. Open the Start menu and access Control Panel.
  2. Select Add or Remove programs and remove Ostap.

Uninstall from Windows 8

  1. Click Windows key + R simultaneously and type in Control Panel.
  2. Tap Enter and navigate to Uninstall a program.
  3. Find the undesirable application and uninstall Ostap.

control-panel-uninstall Remove Ostap

Delete Ostap from your browsers

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Remove Ostap from Internet Explorer

  1. Launch Internet Explorer and choose Gear icon.
    ie-settings Remove Ostap
  2. Open Manage add-ons and delete the undesirable extensons.
    ie-manage-addons Remove Ostap
  3. Click Gear icon again and go to Internet Options.
  4. In the General tab, replace the current home page with the one you prefer.
    ie-internet-options Remove Ostap
  5. Click OK.
  6. Click Gear icon one more time and access Internet Options.
  7. Move to the Advanced tab and select Reset.ie-reset Remove Ostap
  8. Mark the box and tap Reset again.
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Remove Ostap from Mozilla Firefox

  1. Start your browser and open the menu.
  2. Seletc Add-ons and navigate to the Extensions.ff-settings-menu Remove Ostap
  3. Remove the unwanted extensions from the list.
    ff-extensions Remove Ostap
  4. At the same time click Alt+H.
    ff-troubleshooting Remove Ostap
  5. Choose Troubleshooting information and tap Reset.
    ff-troubleshooting Remove Ostap
  6. When the new dialog box appears, tap Reset again.
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Remove Ostap from Google Chrome

  1. Launch your browser and open the menu.
    chrome-menu-tools Remove Ostap
  2. Choose Tools and go to Extensions.
  3. Select the undesirable add-on and tap Trash icon next to it.
    chrome-extensions Remove Ostap
  4. Access menu again and move to Settings.
  5. Click Manage Search engines under Search and delete the current search engine.
    chrome-manage-search Remove Ostap
  6. Choose a new search tool.
    chrome-search-engines Remove Ostap
  7. Open Settings and Click Show Advanced settings.
    chrome-reset Remove Ostap
  8. Tap Reset browser settings and then tap Reset one more time to confirm your action.