Written by Robert Bailey

What is Win32/TrojanDropper.Small.NLV infection?

In this short article you will find about the definition of Win32/TrojanDropper.Small.NLV and its negative effect on your computer system. Such ransomware are a type of malware that is clarified by online scams to require paying the ransom money by a target.

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In the majority of the instances, Win32/TrojanDropper.Small.NLV infection will certainly advise its victims to start funds move for the purpose of counteracting the changes that the Trojan infection has presented to the victim’s device.

Win32/TrojanDropper.Small.NLV Summary

These modifications 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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.
  • Possible date expiration check, exits too soon after checking local time;
  • 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.

  • 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;
  • 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
  • Collects information about installed applications;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Clears web history;
  • Ciphering the documents situated on the sufferer’s hard disk — so the target can no more make use of 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.


The most normal channels through which Win32/TrojanDropper.Small.NLV are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As an effect of individual winding up on a source that organizes a harmful software application;

As quickly as the Trojan is efficiently injected, it will either cipher the data on the sufferer’s PC or protect against the device from operating in a correct way – while additionally placing a ransom money note that mentions the demand for the targets to impact the repayment for the purpose of decrypting the papers or bring back the file system back to the first problem. In many circumstances, the ransom note will come up when the customer reboots the COMPUTER after the system has actually already been harmed.

Win32/TrojanDropper.Small.NLV circulation networks.

In various corners of the globe, Win32/TrojanDropper.Small.NLV grows by jumps and also bounds. Nonetheless, the ransom money notes and tricks of obtaining the ransom money quantity may vary depending upon specific regional (regional) setups. The ransom notes and methods of extorting the ransom amount might differ depending on specific regional (regional) settings.

Ransomware injection

As an example:

    Faulty informs regarding unlicensed software.

    In certain locations, the Trojans frequently wrongfully report having actually detected some unlicensed applications enabled on the target’s tool. The sharp then requires the user to pay the ransom.

    Faulty statements about unlawful web content.

    In countries where software application piracy is much less prominent, this approach is not as efficient for the cyber scams. Conversely, the Win32/TrojanDropper.Small.NLV popup alert may falsely claim to be deriving from a police institution and also will report having situated youngster pornography or other illegal information on the tool.

    Win32/TrojanDropper.Small.NLV popup alert may falsely assert to be deriving from a legislation enforcement establishment and will certainly report having located kid porn or various other prohibited data on the tool. The alert will similarly contain a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: 7A017FCA
md5: 63ac5d64d5d0f068926d4b4aa5584a94
name: 63AC5D64D5D0F068926D4B4AA5584A94.mlw
sha1: 6c5bfbfd10cf346a4e947d10049c1cf5d71235c5
sha256: d6223959ea436993fbe113ebd53a33c278547de5ef862550fde2d88bf364e188
sha512: 673c61581017d433a6ec3ea1275c599234cfe50af5e26c3ad15c91e92f95279bd58532e0d94fac9aa58747b147a0ca5ccb349106d5302c8e1c685106de8f27f1
ssdeep: 24576:D8CrmEi4mUFUwJr8CrmEi/xXvHucjkXmqmufKGu8y2Hx+u:D8CCwJr8CgxfPO1mufKGu6Rn
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Application Layer Gateway Service
FileVersion: 3.40
FileDescription: Application Layer Gateway Service
Translation: 0x0409 0x04b0

Win32/TrojanDropper.Small.NLV also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0040f2c01 )
Elastic malicious (high confidence)
DrWeb Trojan.Siggen3.7449
Cynet Malicious (score: 100)
ALYac MemScan:Backdoor.Generic.559734
Cylance Unsafe
Zillya Dropper.Mudrop.Win32.4457
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_60% (D)
Alibaba TrojanDropper:Win32/Mudrop.51e0d128
K7GW Trojan ( 0040f2c01 )
Cybereason malicious.4d5d0f
Cyren W32/Trojan.GVUU-1131
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/TrojanDropper.Small.NLV
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky Trojan-Dropper.Win32.Mudrop.myi
BitDefender MemScan:Backdoor.Generic.559734
NANO-Antivirus Trojan.Win32.Mudrop.ctjwx
ViRobot Trojan.Win32.MulDrop.1019392
MicroWorld-eScan MemScan:Backdoor.Generic.559734
Tencent Win32.Trojan.Crypt.Woqe
Ad-Aware MemScan:Backdoor.Generic.559734
Sophos Mal/Generic-R + Mal/Behav-112
Comodo TrojWare.Win32.Ransom.Xorist.ET@4mg4hg
F-Secure Trojan.TR/Crypt.XDR.Gen
BitDefenderTheta AI:Packer.A7DF885E1F
VIPRE FraudTool.Win32.WinWebSecurity.pj!1a
TrendMicro TROJ_FRS.0NA103BL20
McAfee-GW-Edition BehavesLike.Win32.Backdoor.dc
Emsisoft MemScan:Backdoor.Generic.559734 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin TrojanDropper.Mudrop.cds
Webroot Vir.Tool.Gen
Avira TR/Crypt.XDR.Gen
eGambit Generic.Malware
Antiy-AVL Trojan[Dropper]/Win32.Mudrop
Kingsoft Heur.SSC.2617084.0010.(kcloud)
Microsoft Spammer:Win32/Fifesock.B
Arcabit Backdoor.Generic.D88A76
AegisLab Trojan.Win32.Mudrop.4!c
ZoneAlarm Trojan-Dropper.Win32.Mudrop.myi
GData MemScan:Backdoor.Generic.559734
AhnLab-V3 Trojan/Win32.VBKrypt.C85782
Acronis suspicious
McAfee Artemis!63AC5D64D5D0
MAX malware (ai score=100)
VBA32 SScope.Trojan.VBRA.3560
Malwarebytes Generic.Malware/Suspicious
Panda Trj/Genetic.gen
TrendMicro-HouseCall TROJ_FRS.0NA103BL20
Rising Dropper.Generic!8.35E (CLOUD)
Yandex Trojan.GenAsa!A1zdrmpzkQ4
Ikarus Trojan-Dropper.Win32.Small
MaxSecure Trojan.Malware.2135731.susgen
Fortinet W32/Mudrop.MYI!tr
AVG Win32:Trojan-gen
Qihoo-360 Win32/TrojanDropper.Mudrop.HxQBEpsA

How to remove Win32/TrojanDropper.Small.NLV 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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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 Win32/TrojanDropper.Small.NLV 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 Win32/TrojanDropper.Small.NLV you can always ask me in the comments for getting help.

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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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