Trojan:Win32/Necurs.A

What is Trojan:Win32/Necurs.A infection?

In this post you will find concerning the meaning of Trojan:Win32/Necurs.A and its adverse influence on your computer system. Such ransomware are a kind of malware that is clarified by on the internet frauds to demand paying the ransom by a target.

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In the majority of the situations, Trojan:Win32/Necurs.A infection will certainly instruct its victims to start funds move for the function of counteracting the amendments that the Trojan infection has introduced to the target’s device.

Trojan:Win32/Necurs.A Summary

These adjustments can be as complies with:

  • 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.
  • Compression (or decompression);
  • 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.
  • Starts servers listening on 0.0.0.0:25960;
  • 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.

  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • Uses Windows utilities for basic functionality;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • 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 copy of itself;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the files found on the target’s hard drive — so the sufferer can no longer use the data;
  • Preventing regular accessibility to the sufferer’s workstation;

Trojan:Win32/Necurs.A

The most regular networks through which Trojan:Win32/Necurs.A are infused are:

  • By methods of phishing emails;
  • As a repercussion of customer ending up on a source that organizes a malicious software;

As quickly as the Trojan is efficiently injected, it will either cipher the information on the target’s PC or avoid the gadget from working in a proper fashion – while likewise putting a ransom money note that discusses the need for the sufferers to impact the repayment for the function of decrypting the documents or bring back the file system back to the preliminary problem. In many circumstances, the ransom money note will certainly come up when the client restarts the COMPUTER after the system has actually already been harmed.

Trojan:Win32/Necurs.A distribution networks.

In numerous corners of the world, Trojan:Win32/Necurs.A expands by leaps as well as bounds. Nonetheless, the ransom money notes and techniques of obtaining the ransom amount may vary relying on certain regional (regional) setups. The ransom money notes as well as techniques of obtaining the ransom quantity may vary depending on particular neighborhood (regional) settings.

Ransomware injection

As an example:

    Faulty notifies concerning unlicensed software program.

    In certain areas, the Trojans usually wrongfully report having actually discovered some unlicensed applications made it possible for on the target’s tool. The sharp after that requires the individual to pay the ransom.

    Faulty declarations about unlawful material.

    In nations where software piracy is much less prominent, this method is not as efficient for the cyber frauds. Additionally, the Trojan:Win32/Necurs.A popup alert may incorrectly assert to be stemming from a police institution and will report having located kid porn or other prohibited information on the gadget.

    Trojan:Win32/Necurs.A popup alert may incorrectly claim to be deriving from a regulation enforcement organization and will certainly report having situated kid pornography or various other prohibited information on the device. The alert will likewise consist of a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: BCA15079
md5: 42ba3b0c9e2794a103df1a8ae153ee80
name: 42BA3B0C9E2794A103DF1A8AE153EE80.mlw
sha1: 90ecc4d59d479823eabf58a0ba08583009a137b0
sha256: 13c8e67567cea054e6b4d27b37945f7b83e9306199eb7f237b88ab8a7fcca3b7
sha512: a8a9600b9f9d908d2b82543a53ad46004720950a5f9295711ed8b7915d4837fd31d208e560d595e9ffb802bffab99999c23a7969388836a9af4d7442b2dd6a14
ssdeep: 6144:Qu8rn4FYYVBCywVvttVi1KWVR9TySwKOhur:Qvrn4WYV9wFVlQ
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Necurs.A also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 004d41c61 )
Elastic malicious (high confidence)
DrWeb Trojan.Click3.12928
Cynet Malicious (score: 100)
CAT-QuickHeal Ransom.TeslaCrypt.WR4
Cylance Unsafe
Zillya Dropper.Necurs.Win32.5015
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba TrojanDropper:Win32/Necurs.0db72536
K7GW Trojan ( 004d41c61 )
Cybereason malicious.c9e279
Symantec Trojan Horse
ESET-NOD32 a variant of Win32/Kryptik.DRZB
APEX Malicious
Avast Win32:Dorder-B [Trj]
Kaspersky Trojan-Dropper.Win32.Necurs.aayw
BitDefender Trojan.Cripack.Gen.1
NANO-Antivirus Trojan.Win32.Necurs.duqzln
MicroWorld-eScan Trojan.Cripack.Gen.1
Tencent Win32.Trojan-dropper.Necurs.Pcsw
Ad-Aware Trojan.Cripack.Gen.1
Sophos Mal/Generic-R
Comodo Malware@#1mxbykdb00dmt
BitDefenderTheta Gen:NN.ZexaF.34670.mq3@aKB3Slei
VIPRE Trojan.Win32.Generic!BT
TrendMicro TROJ_FRS.0NA103BL20
McAfee-GW-Edition TeslaCrypt!42BA3B0C9E27
FireEye Generic.mg.42ba3b0c9e2794a1
Emsisoft Trojan.Cripack.Gen.1 (B)
SentinelOne Static AI – Malicious PE
Jiangmin TrojanDropper.Necurs.cdo
Webroot W32.Trojan.GenKD
Avira HEUR/AGEN.1101453
eGambit Generic.Malware
Kingsoft Win32.Troj.GenericKD.v.(kcloud)
Microsoft Trojan:Win32/Necurs.A
Arcabit Trojan.Cripack.Gen.1
AegisLab Trojan.Win32.Necurs.4!c
GData Trojan.Cripack.Gen.1
McAfee TeslaCrypt!42BA3B0C9E27
MAX malware (ai score=100)
VBA32 TrojanDropper.Necurs
Panda Trj/Genetic.gen
TrendMicro-HouseCall TROJ_FRS.0NA103BL20
Yandex Trojan.GenAsa!pxm+MJweCB0
Ikarus Trojan.Win32.Crypt
Fortinet W32/Bublik.DA!tr
AVG Win32:Dorder-B [Trj]
Paloalto generic.ml
Qihoo-360 Win32/Trojan.Bulta.HwcBeukA

How to remove Trojan:Win32/Necurs.A 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 Trojan:Win32/Necurs.A 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:

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If the guide doesn’t help you to remove Trojan:Win32/Necurs.A 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/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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