NSIS/Kryptik.E

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is NSIS/Kryptik.E infection?

In this article you will certainly find about the interpretation of NSIS/Kryptik.E as well as its unfavorable influence on your computer system. Such ransomware are a form of malware that is specified by online scams to demand paying the ransom by a sufferer.

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In the majority of the cases, NSIS/Kryptik.E virus will certainly instruct its sufferers to initiate funds move for the function of reducing the effects of the modifications that the Trojan infection has introduced to the victim’s device.

NSIS/Kryptik.E Summary

These alterations can be as adheres to:

  • 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.
  • 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.

  • A process created a hidden window;
  • 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
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files located on the sufferer’s disk drive — so the target can no more utilize the information;
  • 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.

NSIS/Kryptik.E

The most normal networks where NSIS/Kryptik.E are injected are:

  • By methods of phishing emails;
  • As a consequence of user winding up on a resource that organizes a harmful software;

As soon as the Trojan is efficiently infused, it will certainly either cipher the information on the sufferer’s PC or stop the gadget from functioning in a proper manner – while likewise positioning a ransom money note that discusses the demand for the victims to impact the payment for the purpose of decrypting the papers or bring back the file system back to the preliminary condition. In the majority of instances, the ransom note will turn up when the customer reboots the PC after the system has currently been damaged.

NSIS/Kryptik.E circulation networks.

In numerous corners of the globe, NSIS/Kryptik.E expands by jumps and also bounds. However, the ransom notes and also methods of extorting the ransom quantity might vary relying on certain neighborhood (regional) setups. The ransom notes and methods of extorting the ransom money amount may vary depending on particular local (regional) setups.

Ransomware injection

For instance:

    Faulty notifies about unlicensed software.

    In specific locations, the Trojans frequently wrongfully report having actually discovered some unlicensed applications enabled on the victim’s device. The alert after that requires the customer to pay the ransom money.

    Faulty statements about unlawful web content.

    In countries where software piracy is much less preferred, this technique is not as effective for the cyber frauds. Alternatively, the NSIS/Kryptik.E popup alert might wrongly assert to be originating from a police establishment as well as will certainly report having situated kid porn or other prohibited data on the device.

    NSIS/Kryptik.E popup alert may incorrectly claim to be obtaining from a regulation enforcement institution and also will certainly report having situated child pornography or various other prohibited data on the tool. The alert will similarly have a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: FC23F8E1
md5: 8ef3334876584dc4b399b60210456c4c
name: 8EF3334876584DC4B399B60210456C4C.mlw
sha1: a152b5e6bd401eb77c62f6d696c559ef3e717988
sha256: 8ebbcb9fb769086cad18e4e8f29c648e8025c151f94cd74c9eeb823cf07c27ab
sha512: 4b063b9d3bd82f0dbc0e4ce35229bf626592e374b79c3fda3e8c418960f5bb4c1e059c66275e4e394f86736959cd095c33526b01f6ea55153798d6c5e480bfbd
ssdeep: 24576:09g7pRIi1dbnlBYzxBOrYComiYdtOrx80wh:1IirYz2jomiY+Q
type: PE32 executable (GUI) Intel 80386, for MS Windows, Nullsoft Installer self-extracting archive

Version Info:

0: [No Data]

NSIS/Kryptik.E also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware2
K7AntiVirusTrojan ( 005153bb1 )
DrWebTrojan.DownLoader25.25859
MicroWorld-eScanTrojan.Ransom.BTP
ALYacTrojan.Ransom.BTP
CylanceUnsafe
ZillyaTrojan.Ransom.Win32.757
SangforRansom.Win32.Agent.gen
CrowdStrikewin/malicious_confidence_90% (W)
AlibabaTrojan:Win32/Predator.b370032e
K7GWTrojan ( 005153bb1 )
Cybereasonmalicious.876584
SymantecTrojan.Gen.MBT
ESET-NOD32NSIS/Kryptik.E
ZonerTrojan.Win32.59890
APEXMalicious
AvastWin32:Trojan-gen
CynetMalicious (score: 99)
BitDefenderTrojan.Ransom.BTP
NANO-AntivirusTrojan.Win32.Kryptik.fgagob
TencentWin32.Trojan.Agent.Egop
Ad-AwareTrojan.Ransom.BTP
SophosMal/Generic-S
ComodoMalware@#2rrgxm51xrt0y
McAfee-GW-EditionBehavesLike.Win32.ObfusRansom.dc
FireEyeTrojan.Ransom.BTP
EmsisoftTrojan.Ransom.BTP (B)
AviraHEUR/AGEN.1116891
MicrosoftTrojan:Win32/Predator.GJ!MTB
ArcabitTrojan.Ransom.BTP
AegisLabTrojan.Win32.Agent.4!c
GDataTrojan.Ransom.BTP
McAfeeArtemis!8EF333487658
MAXmalware (ai score=98)
MalwarebytesRansom.Shade
PandaTrj/CI.A
TrendMicro-HouseCallRansom_Agent.R002C0DDH21
FortinetW32/Injector.XG!tr
AVGWin32:Trojan-gen
Paloaltogeneric.ml
Qihoo-360Win32/Backdoor.Predator.HyoDEpsA

How to remove NSIS/Kryptik.E virus?

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 NSIS/Kryptik.E 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 NSIS/Kryptik.E you can always ask me in the comments for getting help.

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/comparison

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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