Trojan.Nymaim

Written by Robert Bailey

What is Trojan.Nymaim infection?

In this short article you will certainly find concerning the definition of Trojan.Nymaim and also its adverse influence on your computer. Such ransomware are a type of malware that is clarified by on-line fraudulences to demand paying the ransom money by a victim.

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Most of the cases, Trojan.Nymaim infection will certainly instruct its targets to launch funds transfer for the function of neutralizing the modifications that the Trojan infection has presented to the sufferer’s device.

Trojan.Nymaim Summary

These modifications can be as adheres to:

  • 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);
  • 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.
  • A process created a hidden window;
  • 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;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • Exhibits behavior characteristic of Nymaim malware;
  • Zeus P2P (Banking Trojan);
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers situated on the target’s hard disk drive — so the sufferer can no longer utilize the data;
  • Preventing routine accessibility to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

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Trojan.Nymaim

The most common networks through which Trojan.Nymaim Ransomware are infused are:

  • By ways of phishing e-mails;
  • As an effect of individual winding up on a resource that holds a malicious software program;

As soon as the Trojan is effectively injected, it will either cipher the information on the victim’s computer or avoid the device from operating in a proper manner – while additionally positioning a ransom money note that points out the need for the sufferers to effect the settlement for the function of decrypting the papers or bring back the file system back to the first problem. In most instances, the ransom money note will certainly come up when the customer restarts the COMPUTER after the system has currently been harmed.

Trojan.Nymaim circulation networks.

In numerous corners of the world, Trojan.Nymaim expands by leaps as well as bounds. However, the ransom notes and methods of extorting the ransom quantity may vary relying on specific regional (local) settings. The ransom money notes as well as tricks of obtaining the ransom amount might differ depending on specific local (regional) setups.

Ransomware injection

As an example:

    Faulty informs about unlicensed software program.

    In specific areas, the Trojans often wrongfully report having actually found some unlicensed applications allowed on the victim’s tool. The sharp then requires the individual to pay the ransom money.

    Faulty declarations concerning illegal material.

    In nations where software program piracy is less prominent, this approach is not as reliable for the cyber fraudulences. Conversely, the Trojan.Nymaim popup alert might incorrectly claim to be originating from a police establishment and will report having situated kid porn or various other unlawful information on the device.

    Trojan.Nymaim popup alert might incorrectly assert to be acquiring from a law enforcement establishment and also will report having situated child pornography or other prohibited information on the gadget. The alert will in a similar way include a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: 84ABDA56
md5: 129f81d2e91304a525cdb969e5cd74e0
name: 129F81D2E91304A525CDB969E5CD74E0.mlw
sha1: 710fb818b771a25f7ab04e4e7792fa103c9ebd38
sha256: dcab880f79529b98057f087c24d72468a3d38c9efa1bf5207aeb75f9a2d0f078
sha512: 922c640cb735482a8388c91346c7981b20775f42b8a3ff08b53be3a8cbd5ed2ee2209a72413eb208d1e03c9c483855b043d61145e5b77d288f9f74716e5da0a9
ssdeep: 12288:P8t3EsUEMdXXNK3rsJ65AqdK85suWRazNTPEFHcl6oKE4TRye:P8t3Es0orsRqdY8VPEFroKEMEe
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan.Nymaim also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.Agent.CQWS
FireEye Generic.mg.129f81d2e91304a5
CAT-QuickHeal Ransom.Cerber.ZZ4
ALYac Trojan.Agent.CQWS
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
K7AntiVirus Trojan ( 0051aaa01 )
BitDefender Trojan.Agent.CQWS
K7GW Trojan ( 0051aaa01 )
Cybereason malicious.2e9130
BitDefenderTheta Gen:NN.ZexaF.34804.MuW@aCQHAEb
Cyren W32/S-02235887!Eldorado
Symantec Packed.Generic.493
APEX Malicious
Avast Win32:Malware-gen
Kaspersky HEUR:Trojan-Banker.Win32.GozNym.pef
NANO-Antivirus Trojan.Win32.Kryptik.evfwdl
AegisLab Trojan.Win32.Refinka.4!c
Rising Trojan.Kryptik!1.AE8F (CLASSIC)
Ad-Aware Trojan.Agent.CQWS
TACHYON Trojan/W32.Refinka.626688.AT
Emsisoft Trojan.Agent.CQWS (B)
Comodo TrojWare.Win32.Crypt.C@7vajd0
F-Secure Heuristic.HEUR/AGEN.1111254
DrWeb Trojan.Inject2.63739
Zillya Trojan.FakeAV.Win32.335786
TrendMicro TROJ_KRYPTIK_GK270081.UVPM
McAfee-GW-Edition BehavesLike.Win32.Dropper.jc
Sophos Mal/Generic-S + Mal/Elenoocka-E
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Refinka.aip
Avira HEUR/AGEN.1111254
Antiy-AVL Trojan/Win32.TSGeneric
Microsoft TrojanDownloader:Win32/Nymaim.K
Arcabit Trojan.Agent.CQWS
ZoneAlarm HEUR:Trojan-Banker.Win32.GozNym.pef
GData Trojan.Agent.CQWS
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Nymaim.R214335
Acronis suspicious
McAfee Trojan-FOIZ!129F81D2E913
MAX malware (ai score=100)
VBA32 Trojan.FakeAv
Malwarebytes Trojan.Nymaim
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/Kryptik.GCCF
TrendMicro-HouseCall TROJ_KRYPTIK_GK270081.UVPM
Tencent Malware.Win32.Gencirc.10b7a265
Yandex Trojan.GenAsa!L1gbhBczgkU
Ikarus Trojan-Downloader.Win32.Nymaim
eGambit Unsafe.AI_Score_95%
Fortinet W32/Kryptik.GKMB!tr
AVG Win32:Malware-gen
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Win32/Trojan.297

How to remove Trojan.Nymaim ransomware?

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.

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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 Trojan.Nymaim 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?

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If the guide doesn’t help you to remove Trojan.Nymaim 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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