TrojanDownloader:Win32/Nymaim.K

Written by Robert Bailey

What is TrojanDownloader:Win32/Nymaim.K infection?

In this article you will discover concerning the meaning of TrojanDownloader:Win32/Nymaim.K and also its unfavorable effect on your computer system. Such ransomware are a kind of malware that is clarified by online scams to demand paying the ransom money by a sufferer.

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Most of the instances, TrojanDownloader:Win32/Nymaim.K infection will instruct its victims to start funds move for the objective of reducing the effects of the amendments that the Trojan infection has presented to the sufferer’s gadget.

TrojanDownloader:Win32/Nymaim.K Summary

These alterations 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.
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers situated on the sufferer’s hard disk drive — so the target can no more make use of the data;
  • Preventing routine access 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.

TrojanDownloader:Win32/Nymaim.K

One of the most regular channels where TrojanDownloader:Win32/Nymaim.K Trojans are injected are:

  • By means of phishing e-mails;
  • As a consequence of individual ending up on a resource that organizes a destructive software program;

As quickly as the Trojan is effectively infused, it will either cipher the information on the target’s computer or prevent the gadget from functioning in a proper manner – while likewise putting a ransom note that states the need for the targets to effect the repayment for the objective of decrypting the papers or recovering the file system back to the initial problem. In a lot of circumstances, the ransom note will certainly show up when the client reboots the COMPUTER after the system has actually currently been harmed.

TrojanDownloader:Win32/Nymaim.K distribution networks.

In various edges of the globe, TrojanDownloader:Win32/Nymaim.K expands by leaps and bounds. Nonetheless, the ransom notes and also methods of obtaining the ransom quantity may vary depending on certain neighborhood (local) setups. The ransom money notes and methods of extorting the ransom money amount might differ depending on specific local (local) settings.

Ransomware injection

For example:

    Faulty signals about unlicensed software program.

    In specific areas, the Trojans often wrongfully report having discovered some unlicensed applications enabled on the sufferer’s device. The alert after that requires the user to pay the ransom money.

    Faulty statements concerning illegal material.

    In nations where software application piracy is less preferred, this approach is not as effective for the cyber frauds. Alternatively, the TrojanDownloader:Win32/Nymaim.K popup alert may falsely assert to be deriving from a police institution and also will certainly report having located youngster pornography or various other unlawful data on the tool.

    TrojanDownloader:Win32/Nymaim.K popup alert might wrongly assert to be obtaining from a regulation enforcement organization and will report having situated child porn or other unlawful information on the tool. The alert will likewise consist of a need for the customer to pay the ransom.

Technical details

File Info:

crc32: 900FD2C5
md5: d520fe9e1426c041645a5a090e3f79aa
name: D520FE9E1426C041645A5A090E3F79AA.mlw
sha1: a541b0f59283a64c9fd997ff68e786a22cd5c701
sha256: dcb56d7d4fec125ccdc86cb6eb384a0024bc8130b21e4dba7d1cef4ac864e2a2
sha512: dba05f59dfc44ff2a6cdec5bd980112a63cf93daf09da2a1a32455907e65bf3815c44fb62e9663d7618706caca79d4076b346f66d5475da25c14497025439caa
ssdeep: 12288:CIZUFOEM7XzWwVLKok7TSNekfwZQlj4uR481ARCL1r:IWDpEoESNNNlF4qAY1
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

TrojanDownloader:Win32/Nymaim.K also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware2
Elastic malicious (high confidence)
DrWeb Trojan.Siggen7.29857
MicroWorld-eScan Generic.Nymaim.E.A0E00B69
FireEye Generic.mg.d520fe9e1426c041
ALYac Generic.Nymaim.E.A0E00B69
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Malware
K7AntiVirus Trojan ( 0051b2ad1 )
BitDefender Generic.Nymaim.E.A0E00B69
K7GW Trojan ( 00516f3d1 )
Cybereason malicious.e1426c
BitDefenderTheta Gen:NN.ZexaF.34804.EmW@aiZkTkn
Cyren W32/S-942a1160!Eldorado
Symantec Packed.Generic.493
APEX Malicious
Avast Win32:TrojanX-gen [Trj]
ClamAV Win.Trojan.Tofsee-6345150-0
Kaspersky HEUR:Trojan.Win32.Generic
NANO-Antivirus Trojan.Win32.Cryptoff.esukpq
AegisLab Trojan.Win32.Cryptoff.j!c
Tencent Malware.Win32.Gencirc.10b75302
Ad-Aware Generic.Nymaim.E.A0E00B69
Emsisoft Generic.Nymaim.E.A0E00B69 (B)
Comodo Backdoor.Win32.Tofsee.FV@7l1ow1
F-Secure Heuristic.HEUR/AGEN.1120889
Baidu Win32.Trojan.Kryptik.rb
Zillya Downloader.Nymaim.Win32.2084
TrendMicro Ransom_CERBER.SMALY0
McAfee-GW-Edition BehavesLike.Win32.Ransomware.gc
Sophos Mal/Generic-S + Mal/Elenoocka-E
Ikarus Trojan-Downloader.Nymaim
Jiangmin Trojan.Cryptoff.ct
eGambit Unsafe.AI_Score_99%
Avira HEUR/AGEN.1120889
Antiy-AVL Trojan/Win32.TSGeneric
Microsoft TrojanDownloader:Win32/Nymaim.K
Arcabit Generic.Nymaim.E.A0E00B69
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Generic.Nymaim.E.A0E00B69
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Cryptoff.C2142188
Acronis suspicious
McAfee Ransomware-GFM!D520FE9E1426
MAX malware (ai score=100)
VBA32 Trojan.FakeAV.01657
Malwarebytes Malware.AI.1627931571
Panda Trj/Genetic.gen
ESET-NOD32 Win32/TrojanDownloader.Nymaim.BA
TrendMicro-HouseCall Ransom_CERBER.SMALY0
Rising Ransom.Cryptoff!8.E62C (TFE:5:E6HioxbMCFI)
Yandex Trojan.GenAsa!d3Ii7rnNc2Q
SentinelOne Static AI – Malicious PE – Downloader
MaxSecure Win.MxResIcn.Heur.Gen
Fortinet W32/Kryptik.FXFR!tr
AVG Win32:TrojanX-gen [Trj]
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Win32/Trojan.Ransom.819

How to remove TrojanDownloader:Win32/Nymaim.K 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.

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Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for TrojanDownloader:Win32/Nymaim.K 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 TrojanDownloader:Win32/Nymaim.K 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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