Trojan:Win32/Kovter!rfn

What is Trojan:Win32/Kovter!rfn infection?

In this short article you will certainly locate about the definition of Trojan:Win32/Kovter!rfn as well as its negative influence on your computer system. Such ransomware are a kind of malware that is elaborated by on-line scams to demand paying the ransom by a victim.

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Most of the instances, Trojan:Win32/Kovter!rfn ransomware will advise its sufferers to start funds transfer for the function of counteracting the changes that the Trojan infection has introduced to the victim’s gadget.

Trojan:Win32/Kovter!rfn Summary

These adjustments can be as follows:

• Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
• Injection (inter-process);
• Injection (Process Hollowing);
• Creates RWX memory. There is a security trick with memory regions that allows an attacker to fill a buffer with a shellcode and then execute it. Filling a buffer with shellcode isn’t a big deal, it’s just data. The problem arises when the attacker is able to control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow, and then changing the flow of execution by assigning this pointer to the address of the shellcode.
• Mimics the system’s user agent string for its own requests;
• Attempts to connect to a dead IP:Port (237 unique times);
• Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

  Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

• HTTP traffic contains suspicious features which may be indicative of malware related traffic;
• Performs some HTTP requests;
• Unconventionial binary language: Polish;
• Unconventionial language used in binary resources: Polish;
• The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
• Executed a process and injected code into it, probably while unpacking;
• Detects VirtualBox through the presence of a library;
• Detects Sandboxie through the presence of a library;
• Detects SunBelt Sandbox through the presence of a library;
• Deletes its original binary from disk;
• A process attempted to delay the analysis task by a long amount of time.;
• Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
• Creates a registry key or value with NUL characters to avoid detection with regedit;
• Installs itself for autorun at Windows startup.

  There is simple tactic using the Windows startup folder located at:
  C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

  The registry run keys perform the same action, and can be located in different locations:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
• Stores JavaScript or a script command in the registry, likely for persistence or configuration;
• Attempts to identify installed analysis tools by registry key;
• Attempts to identify installed AV products by installation directory;
• Checks the version of Bios, possibly for anti-virtualization;
• Checks the presence of disk drives in the registry, possibly for anti-virtualization;
• Detects VirtualBox through the presence of a file;
• Detects VirtualBox through the presence of a registry key;
• Detects VMware through the presence of a file;
• Detects VMware through the presence of a registry key;
• Detects Virtual PC through the presence of a file;
• Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
• Attempts to modify browser security settings;
• Generates some ICMP traffic;
• Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
• Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
• Ciphering the records located on the sufferer’s hard drive — so the sufferer can no more use the data;
• Preventing routine accessibility to the victim’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Similar behavior

Related domains

Trojan:Win32/Kovter!rfn

The most typical networks where Trojan:Win32/Kovter!rfn are infused are:

• By means of phishing emails;
• As a consequence of customer winding up on a source that holds a destructive software program;

As quickly as the Trojan is efficiently injected, it will either cipher the information on the sufferer’s computer or stop the tool from operating in a correct manner – while also positioning a ransom money note that discusses the demand for the sufferers to impact the settlement for the purpose of decrypting the papers or restoring the file system back to the initial condition. In many instances, the ransom note will show up when the customer reboots the PC after the system has already been harmed.

Trojan:Win32/Kovter!rfn circulation networks.

In numerous edges of the world, Trojan:Win32/Kovter!rfn grows by leaps and also bounds. Nonetheless, the ransom money notes and techniques of extorting the ransom money amount might vary depending on particular neighborhood (local) setups. The ransom money notes as well as tricks of extorting the ransom money quantity may differ depending on certain regional (local) settings.

As an example:

Faulty alerts about unlicensed software program.

In certain areas, the Trojans often wrongfully report having actually discovered some unlicensed applications allowed on the target’s tool. The alert then demands the customer to pay the ransom money.

Faulty declarations regarding illegal web content.

In countries where software piracy is less popular, this technique is not as effective for the cyber scams. Alternatively, the Trojan:Win32/Kovter!rfn popup alert may incorrectly assert to be originating from a police establishment and will report having situated kid porn or various other illegal information on the device.

Trojan:Win32/Kovter!rfn popup alert might wrongly assert to be deriving from a legislation enforcement establishment and also will report having situated kid porn or other illegal information on the gadget. The alert will in a similar way include a demand for the user to pay the ransom money.

Technical details

File Info:
crc32: 22359914
md5: 3cf83ee9b1eca7399241843618e9ea5e
name: exe1.exe
sha1: 06e41c2587ab8235c6782cf1af589099a6242666
sha256: f5be23df0cfd529674c9939bf11e4d0f61693f898cf989e7b7acf62202c0874e
sha512: eeb6ea9a7c9c8b794a5603238c07f701b389bf9594be849f38ae500b41615231f9728c48586895d6c4912c1ecad6076a19b88631cbfde2e31ceb45087afab36d
ssdeep: 6144:C9oXC7GqcqR9SptLvc6JYVdz6zxV7roeS1SDDqexyBnbjcB8cxBdtcwCcML8mX/2:ZiG7e9SpJvcoYPIzfU1SryRUXxztcdyZ
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:
LegalCopyright: Copyright (C) 2001-2015 by (Canada) Ltd.
InternalName: PDF-Change 
FileVersion: 2.5.0314
FileDescription: PDF-Change 
SpecialBuild: 
CompanyName: polion
LegalTrademarks: Tracker (Canada) Ltd.
Comments: PDF-Change 
ProductName: PDF-Change
ProductVersion: 2.5 
PrivateBuild: 
OriginalFilename: polion.exe
Translation: 0x0415 0x04e2

Trojan:Win32/Kovter!rfn also known as:

How to remove Trojan:Win32/Kovter!rfn virus?

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

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The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.².

Download GridinSoft Anti-Malware.

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Run the setup file.

When setup file has finished downloading, double-click on the install-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

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.

Press “Install” button.

Once installed, Anti-Malware will automatically run.

Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for Trojan:Win32/Kovter!rfn 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.

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.

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If the guide doesn’t help you to remove Trojan:Win32/Kovter!rfn you can always ask me in the comments for getting help.

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