Ransom:Win32/Exmas

What is Ransom:Win32/Exmas infection?

In this post you will certainly locate regarding the interpretation of Ransom:Win32/Exmas as well as its negative impact on your computer system. Such ransomware are a kind of malware that is specified by on the internet scams to demand paying the ransom by a sufferer.

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In the majority of the instances, Ransom:Win32/Exmas ransomware will certainly advise its targets to launch funds transfer for the function of counteracting the modifications that the Trojan infection has presented to the victim’s device.

Ransom:Win32/Exmas 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Presents an Authenticode digital signature;
  • 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.
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • 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;
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Attempts to create or modify system certificates;
  • 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 sufferer’s hard disk drive — so the target can no longer use 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.

Ransom:Win32/Exmas

The most common channels where Ransom:Win32/Exmas Ransomware Trojans 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 a consequence of customer winding up on a resource that holds a destructive software program;

As quickly as the Trojan is successfully infused, it will certainly either cipher the information on the victim’s computer or protect against the gadget from working in a proper manner – while also placing a ransom money note that points out the need for the targets to impact the payment for the purpose of decrypting the records or bring back the file system back to the first problem. In most circumstances, the ransom note will certainly come up when the client reboots the COMPUTER after the system has currently been harmed.

Ransom:Win32/Exmas distribution channels.

In various edges of the globe, Ransom:Win32/Exmas grows by leaps and also bounds. However, the ransom notes and also techniques of extorting the ransom amount might vary depending on particular neighborhood (local) settings. The ransom notes and also methods of extorting the ransom money amount may differ depending on certain regional (regional) setups.

Ransomware injection

For example:

    Faulty informs regarding unlicensed software.

    In certain locations, the Trojans usually wrongfully report having actually discovered some unlicensed applications enabled on the victim’s device. The sharp after that requires the individual to pay the ransom.

    Faulty declarations about unlawful web content.

    In countries where software program piracy is less popular, this technique is not as reliable for the cyber scams. Additionally, the Ransom:Win32/Exmas popup alert might wrongly claim to be originating from a law enforcement establishment and will report having situated child porn or other prohibited data on the gadget.

    Ransom:Win32/Exmas popup alert might falsely assert to be obtaining from a legislation enforcement institution as well as will certainly report having located youngster porn or various other prohibited information on the gadget. The alert will in a similar way contain a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: 4EB20E12
md5: 887b35a87fb75e2d889694143e3c9014
name: 887B35A87FB75E2D889694143E3C9014.mlw
sha1: c8be4500127bfce10ab38152a8a5003b75613603
sha256: 78cc9626bb8d6f9d8ddf8236c197894a86f9d54a294b38c9c0b82744496b3fae
sha512: 98cf0e201092e6d43a7ec5db4d80e6cc20ec9a983098b04597039b244535f78a4096b76bc62e591336b810fafa302e1009a64be6e788f24dcc8b3ac0c8eb930a
ssdeep: 3072:b2HPbwlPLBkWW+DrxsYwvif/Sx+YzM5ul7SaD82gHxoLoPTI1IL7vtJf:bYT0PLB3QNJz6uhbDju6c3LJl
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

LegalCopyright: xa9 Copyright 2015
FileVersion: 2.70.312
CompanyName:
Comments: This installation was built with Inno Setup.
ProductName: Advanced Malware Protection
ProductVersion: 2.70.312
FileDescription: Advanced Malware Protection
Translation: 0x0000 0x04b0

Ransom:Win32/Exmas also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 005020721 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.10098
Cynet Malicious (score: 100)
ALYac Trojan.Ransom.MerryXMas
Cylance Unsafe
Zillya Trojan.Crynigma.Win32.31
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Trojan:Win32/Kryptik.ali2000016
K7GW Trojan ( 005020721 )
Cybereason malicious.87fb75
Symantec Ransom.TeslaCrypt
ESET-NOD32 a variant of MSIL/Injector.RBY
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Trojan.Agent-5577198-0
Kaspersky Trojan-Ransom.Win32.Crynigma.bb
BitDefender Gen:Variant.Ransom.Xmas.5
NANO-Antivirus Trojan.Win32.Crynigma.ekigyz
ViRobot Trojan.Win32.Z.Injector.210368
MicroWorld-eScan Gen:Variant.Ransom.Xmas.5
Tencent Win32.Trojan.Raas.Auto
Ad-Aware Gen:Variant.Ransom.Xmas.5
Sophos Troj/Ransom-ECJ
Comodo Malware@#3771nxqpstaq3
BitDefenderTheta Gen:NN.ZemsilF.34670.mm2@amAWrWjO
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_EXMAS.C
McAfee-GW-Edition RDN/Spybot.ag
FireEye Generic.mg.887b35a87fb75e2d
Emsisoft Gen:Variant.Ransom.Xmas.5 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Generic.bretf
Webroot W32.Suspicious.Heur
Avira HEUR/AGEN.1121944
eGambit PE.Heur.InvalidSig
Kingsoft Win32.Troj.GenericKD.v.(kcloud)
Microsoft Ransom:Win32/Exmas
Arcabit Trojan.Ransom.Xmas.5
GData Gen:Variant.Ransom.Xmas.5
AhnLab-V3 Trojan/Win32.Ransom.C1739129
McAfee RDN/Spybot.ag
MAX malware (ai score=100)
VBA32 Trojan-Ransom.Crynigma
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom_EXMAS.C
Rising Ransom.Crynigma!8.61B4 (CLOUD)
Ikarus Trojan.MSIL.Krypt
Fortinet W32/Crynigma.BB!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Generic.HgIASOgA

How to remove Ransom:Win32/Exmas virus?

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 Ransom:Win32/Exmas 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 Ransom:Win32/Exmas 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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