Written by Robert Bailey

What is Win32/TrojanDownloader.Nymaim.BA infection?

In this article you will discover about the meaning of Win32/TrojanDownloader.Nymaim.BA as well as its unfavorable impact on your computer. Such ransomware are a form of malware that is elaborated by online frauds to require paying the ransom money by a victim.

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In the majority of the situations, Win32/TrojanDownloader.Nymaim.BA virus will certainly instruct its sufferers to start funds move for the objective of reducing the effects of the changes that the Trojan infection has actually introduced to the victim’s gadget.

Win32/TrojanDownloader.Nymaim.BA 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.
  • 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;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers situated on the target’s disk drive — so the victim can no more utilize the data;
  • Preventing normal accessibility to the victim’s workstation;


The most typical networks whereby Win32/TrojanDownloader.Nymaim.BA Trojans are infused are:

  • By means of phishing emails;
  • As a repercussion of user winding up on a resource that hosts a malicious software program;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the data on the sufferer’s PC or prevent the device from functioning in a proper manner – while also placing a ransom money note that discusses the requirement for the victims to effect the payment for the objective of decrypting the files or bring back the documents system back to the initial condition. In a lot of instances, the ransom note will certainly show up when the customer reboots the COMPUTER after the system has currently been harmed.

Win32/TrojanDownloader.Nymaim.BA distribution channels.

In numerous corners of the world, Win32/TrojanDownloader.Nymaim.BA expands by leaps and bounds. However, the ransom notes as well as methods of obtaining the ransom quantity may vary relying on specific neighborhood (local) setups. The ransom notes and techniques of obtaining the ransom money amount may differ depending on certain regional (regional) setups.

Ransomware injection

As an example:

    Faulty notifies about unlicensed software application.

    In certain locations, the Trojans usually wrongfully report having actually found some unlicensed applications allowed on the target’s tool. The alert after that demands the user to pay the ransom.

    Faulty statements concerning unlawful material.

    In nations where software program piracy is much less prominent, this technique is not as reliable for the cyber scams. Additionally, the Win32/TrojanDownloader.Nymaim.BA popup alert may wrongly declare to be deriving from a police establishment and will report having located kid porn or various other prohibited data on the tool.

    Win32/TrojanDownloader.Nymaim.BA popup alert might wrongly declare to be acquiring from a regulation enforcement establishment and will certainly report having situated child porn or various other illegal information on the device. The alert will likewise include a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: 18C844F7
md5: d6a71ff4604c566fa053b12247d2a08b
name: D6A71FF4604C566FA053B12247D2A08B.mlw
sha1: ff2e9380c6b307147627d77a4926de3967595a22
sha256: f8d82443d8aaea08ab8911dc0d21df74b58c437213e9a9f64f3ad4c2c0c04755
sha512: cb20d1426b11f57d9b9be5a88217d4dac2a085518c8e1c7c1bed72bb3b4666b48b40972294852f4c3f81cce1e1cf7ccf08f9bda471aef3193acef0c1c2a039b7
ssdeep: 12288:z+X7dkVkJuSv/cFa9dGvfKqFEdpt3NrClbn/adUIGw7:wJ3uW/cFamvfTq2NiyIG
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/TrojanDownloader.Nymaim.BA also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Trojan.PackedENT.44
MicroWorld-eScan Trojan.Brsecmon.1
ALYac Trojan.Brsecmon.1
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.Cryptoff.j!c
Sangfor Malware
K7AntiVirus Trojan ( 00512c141 )
BitDefender Trojan.Brsecmon.1
K7GW Trojan ( 00512c141 )
Cybereason malicious.4604c5
BitDefenderTheta Gen:NN.ZexaF.34804.LmW@aenCX2d
Cyren W32/Nymaim.BC.gen!Eldorado
Symantec ML.Attribute.HighConfidence
TrendMicro-HouseCall TROJ_NYMAIM.SMR2
Avast Win32:Malware-gen
Kaspersky HEUR:Trojan.Win32.Regsup.pef
NANO-Antivirus Trojan.Win32.Cryptoff.erocym
Rising Ransom.Cryptoff!8.E62C (CLOUD)
Ad-Aware Trojan.Brsecmon.1
Emsisoft Trojan.Brsecmon.1 (B)
Comodo Malware@#366oy9n2gkw54
F-Secure Heuristic.HEUR/AGEN.1104194
McAfee-GW-Edition BehavesLike.Win32.Generic.jc
Sophos Mal/Generic-S
Ikarus Trojan.Inject
Jiangmin Trojan.Cryptoff.y
Avira HEUR/AGEN.1104194
Antiy-AVL Trojan/Win32.TSGeneric
Microsoft TrojanDownloader:Win32/Silcon!rfn
Arcabit Trojan.Brsecmon.1
ZoneAlarm HEUR:Trojan.Win32.Regsup.pef
GData Trojan.Brsecmon.1
Cynet Malicious (score: 100)
AhnLab-V3 Malware/Win32.Generic.C2076125
Acronis suspicious
McAfee Packed-PB.c!D6A71FF4604C
MAX malware (ai score=100)
VBA32 Trojan-Ransom.Cryptoff
Malwarebytes Malware.AI.3627546638
Panda Trj/GdSda.A
APEX Malicious
ESET-NOD32 Win32/TrojanDownloader.Nymaim.BA
Tencent Malware.Win32.Gencirc.10b3d5f3
Yandex Trojan.Cryptoff!Fuu1Wo6XLIE
SentinelOne Static AI – Malicious PE – Downloader
eGambit Unsafe.AI_Score_99%
Fortinet W32/Nymaim.BA!tr
AVG Win32:Malware-gen
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Win32/Trojan.Cryptoff.T

How to remove Win32/TrojanDownloader.Nymaim.BA 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.

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.

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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/TrojanDownloader.Nymaim.BA 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 Win32/TrojanDownloader.Nymaim.BA 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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