Win32/Kryptik.CVYW

Written by Robert Bailey

What is Win32/Kryptik.CVYW infection?

In this post you will certainly locate concerning the interpretation of Win32/Kryptik.CVYW as well as its adverse influence on your computer system. Such ransomware are a type of malware that is clarified by on-line scams to demand paying the ransom money by a target.

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In the majority of the instances, Win32/Kryptik.CVYW virus will certainly instruct its victims to launch funds move for the purpose of neutralizing the modifications that the Trojan infection has introduced to the target’s tool.

Win32/Kryptik.CVYW Summary

These modifications can be as follows:

  • 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);
  • Attempts to connect to a dead IP:Port (2 unique times);
  • 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 attempted to delay the analysis task.;
  • 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.

  • A process created a hidden window;
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • Unconventionial binary language: Russian;
  • Executed a process and injected code into it, probably while unpacking;
  • Attempts to delete volume shadow copies;
  • A system process is generating network traffic likely as a result of process injection;
  • Behavior consistent with a dropper attempting to download the next stage.;
  • 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
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Attempts to modify browser security settings;
  • Creates a copy of itself;
  • Harvests information related to installed mail clients;
  • 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.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the files located on the target’s hard disk drive — so the victim can no longer make use of the information;
  • Preventing normal 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.
Similar behavior
Related domains
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ifgvipe.blasters.biz Trojan.Ransom.Cerber.1
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wlplad.blasters.biz Trojan.Ransom.Cerber.1

Win32/Kryptik.CVYW

The most normal networks through which Win32/Kryptik.CVYW 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 repercussion of user winding up on a resource that holds a destructive software;

As quickly as the Trojan is successfully injected, it will either cipher the information on the target’s PC or protect against the device from functioning in a proper manner – while also putting a ransom note that mentions the demand for the sufferers to effect the settlement for the objective of decrypting the records or restoring the documents system back to the preliminary condition. In many circumstances, the ransom money note will certainly come up when the customer reboots the PC after the system has already been harmed.

Win32/Kryptik.CVYW circulation networks.

In various corners of the world, Win32/Kryptik.CVYW expands by jumps and also bounds. Nevertheless, the ransom notes as well as tricks of extorting the ransom money amount might differ depending on particular local (regional) settings. The ransom notes as well as tricks of extorting the ransom amount might differ depending on specific local (regional) settings.

Ransomware injection

As an example:

    Faulty informs regarding unlicensed software application.

    In specific locations, the Trojans typically wrongfully report having actually discovered some unlicensed applications allowed on the victim’s device. The alert then requires the customer to pay the ransom.

    Faulty declarations regarding unlawful content.

    In nations where software program piracy is much less prominent, this technique is not as effective for the cyber fraudulences. Alternatively, the Win32/Kryptik.CVYW popup alert may falsely assert to be deriving from a law enforcement establishment as well as will report having located kid pornography or various other unlawful information on the tool.

    Win32/Kryptik.CVYW popup alert may incorrectly assert to be obtaining from a legislation enforcement establishment and also will report having located child porn or other illegal information on the gadget. The alert will in a similar way have a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: 0EA25BD7
md5: afc76d82ca51724e9368828dab2cb598
name: AFC76D82CA51724E9368828DAB2CB598.mlw
sha1: f58bcb2383a8178190c887c07301f4a7e66047cc
sha256: a0034b618bd6519ad19534fb1f6069a309e07bb2bb2c3ae4a710bf3bb1eb86dc
sha512: 869e8a2cc7196e5faa2a39d73594139892a98dfdf15c3695c9422fbcbf9c227e747ed9f28bb3c31537382d572e4c7412901aac35ddaa38c56b82ba7582107508
ssdeep: 24576:PxlVNsOsJZZCd+Inb8Xik8V/Hu4DwOARLs0:Px/qJZunb8XkV/OtBRY
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: xa9 gora
InternalName: Button For 7z SFX
FileVersion: Version of file 4.2.4 build 2000 [x86]
CompanyName: Company 'gora-sah'
PrivateBuild: 08.06.2012
LegalTrademarks: Still is not present
Comments: Button For creation and job with 7z SXF archives
ProductName: Button v4.2.4 [x86]
SpecialBuild: For all users
ProductVersion: Version of product 4.2.4 [x86]
FileDescription: 7z SFX archive tool. The last version of 'Button' you can find on http://buttontc.7zsfx.info
OriginalFilename: Button.exe
Translation: 0x0419 0x04b0

Win32/Kryptik.CVYW also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 005224381 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.761
Cynet Malicious (score: 99)
ALYac Trojan.Ransom.Cerber.1
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba TrojanDropper:Win32/dropper.ali1003001
K7GW Trojan ( 005224381 )
Cybereason malicious.2ca517
Baidu Win32.Trojan.Kryptik.anp
Symantec Packed.Generic.459
ESET-NOD32 a variant of Win32/Kryptik.CVYW
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Ransomware.Cerber-9779166-0
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.Ransom.Cerber.1
NANO-Antivirus Trojan.Win32.Kryptik.evpeya
MicroWorld-eScan Trojan.Ransom.Cerber.1
Tencent Win32.Trojan.Generic.Lrsh
Ad-Aware Trojan.Ransom.Cerber.1
Sophos ML/PE-A + Mal/Ransom-EJ
Comodo TrojWare.Win32.Kryptik.ERJ@6l0vie
BitDefenderTheta Gen:NN.ZexaF.34690.yr0@aW@mZMci
VIPRE Trojan.Win32.Generic.pak!cobra
TrendMicro Ransom_HPCERBER.SMALY5A
McAfee-GW-Edition BehavesLike.Win32.Generic.tm
FireEye Generic.mg.afc76d82ca51724e
Emsisoft Trojan.Ransom.Cerber.1 (B)
SentinelOne Static AI – Suspicious PE
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1109746
eGambit Unsafe.AI_Score_100%
Antiy-AVL Trojan/Generic.ASMalwS.22E79E2
Microsoft Ransom:Win32/Teerac.A
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.Ransom.Cerber.1
AhnLab-V3 Win-Trojan/Lukitus2.Exp
Acronis suspicious
McAfee GenericRXDH-ZL!AFC76D82CA51
MAX malware (ai score=99)
VBA32 BScope.TrojanProxy.Bunitu
Malwarebytes Spyware.Zbot.ED
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom_HPCERBER.SMALY5A
Rising Trojan.Kryptik!1.AE9C (CLOUD)
Yandex Trojan.GenAsa!fKLk7NtCfS8
Ikarus Trojan.Win32.Crypt
Fortinet W32/Dridex.DD!tr
AVG Win32:Malware-gen
Paloalto generic.ml

How to remove Win32/Kryptik.CVYW ransomware?

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 Win32/Kryptik.CVYW 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/Kryptik.CVYW 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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