Win32/Kryptik.GKVF
William Burgess What is Win32/Kryptik.GKVF infection?
In this short article you will discover regarding the interpretation of Win32/Kryptik.GKVF as well as its negative effect on your computer. Such ransomware are a kind of malware that is clarified by on the internet frauds to require paying the ransom by a target.
In the majority of the instances, Win32/Kryptik.GKVF virus will instruct its sufferers to initiate funds transfer for the purpose of counteracting the modifications that the Trojan infection has introduced to the victim’s gadget.
Win32/Kryptik.GKVF 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.
- A process attempted to delay the analysis task.;
- Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
- Unconventionial language used in binary resources: Portuguese (Brazilian);
- The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
- Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
- Creates a registry key or value with NUL characters to avoid detection with regedit;
- 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 browser security settings;
- Creates a copy of itself;
- Attempts to disable browser security warnings;
- Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
- Ciphering the papers located on the target’s hard disk drive — so the sufferer can no more make use of the information;
- Preventing regular accessibility to the target’s workstation;
Win32/Kryptik.GKVF
One of the most regular channels whereby Win32/Kryptik.GKVF Trojans are injected are:
- By means of phishing e-mails;
- As a repercussion of user winding up on a source that hosts a destructive software application;
As soon as the Trojan is successfully injected, it will either cipher the information on the target’s PC or avoid the tool from operating in an appropriate manner – while also putting a ransom note that mentions the demand for the targets to impact the payment for the purpose of decrypting the records or restoring the documents system back to the first problem. In a lot of circumstances, the ransom note will certainly turn up when the client restarts the PC after the system has currently been harmed.
Win32/Kryptik.GKVF circulation channels.
In different corners of the world, Win32/Kryptik.GKVF expands by jumps and bounds. However, the ransom notes and also tricks of extorting the ransom money amount may vary depending upon specific local (local) settings. The ransom money notes as well as techniques of obtaining the ransom amount may differ depending on specific regional (local) settings.
As an example:
Faulty informs regarding unlicensed software program.
In particular locations, the Trojans commonly wrongfully report having found some unlicensed applications made it possible for on the target’s gadget. The alert after that demands the individual to pay the ransom.
Faulty declarations concerning unlawful content.
In nations where software program piracy is much less preferred, this technique is not as reliable for the cyber scams. Additionally, the Win32/Kryptik.GKVF popup alert may falsely declare to be originating from a law enforcement organization and will report having located child porn or other illegal information on the gadget.
Win32/Kryptik.GKVF popup alert might wrongly declare to be obtaining from a legislation enforcement organization and will certainly report having located child porn or various other illegal data on the gadget. The alert will similarly contain a requirement for the customer to pay the ransom money.
Technical details
File Info:
crc32: F8D91B99md5: e530e344f52c84ae8caf3aee1f6dc223name: E530E344F52C84AE8CAF3AEE1F6DC223.mlwsha1: de296d217905fffc596f4dc091861a2e7c319fb2sha256: 79e8de80ce067dd756de0d9057ba7640895f28b42ff1a401aabbcdc74b6ddb83sha512: 3127870e6162741e1ddf8161ed6a998539136f60729b1aa59bd2aab498eb5253d12c77f1617ece3e737e758ed14b949fb828c7a2fd68899cfa2f32e6da9549c1ssdeep: 3072:5ffGIvQ8MYwfEh+AocP8aQJ1wjZTYFjLe:B5vQ8MKqcbjaFjLetype: PE32 executable (GUI) Intel 80386, for MS WindowsVersion Info:
FileVersion: 1.0.0.2Translation: 0x0809 0x04b0
Win32/Kryptik.GKVF also known as:
| GridinSoft | Trojan.Ransom.Gen |
| Bkav | W32.AIDetect.malware1 |
| Elastic | malicious (high confidence) |
| DrWeb | Trojan.TinyNuke.9 |
| MicroWorld-eScan | Trojan.BRMon.Gen.4 |
| FireEye | Generic.mg.e530e344f52c84ae |
| McAfee | Trojan-FQPW!E530E344F52C |
| Cylance | Unsafe |
| AegisLab | Trojan.Win32.Fareit.4!c |
| Sangfor | Trojan.Win32.Save.a |
| K7AntiVirus | Trojan ( 0053d5971 ) |
| BitDefender | Trojan.BRMon.Gen.4 |
| K7GW | Trojan ( 0053d5971 ) |
| CrowdStrike | win/malicious_confidence_80% (D) |
| BitDefenderTheta | Gen:NN.ZexaF.34608.hu0@aWAIgDcG |
| Symantec | Packed.Generic.525 |
| APEX | Malicious |
| Avast | Win32:PWSX-gen [Trj] |
| Kaspersky | Trojan-PSW.Win32.Fareit.ejwo |
| Alibaba | TrojanPSW:Win32/Fareit.882b2020 |
| NANO-Antivirus | Trojan.Win32.Fareit.fhvzuj |
| ViRobot | Trojan.Win32.U.GandCrab.172032 |
| Rising | Trojan.Vigorf!8.EAEA (TFE:5:MzMuGJdPmpB) |
| Ad-Aware | Trojan.BRMon.Gen.4 |
| Sophos | Mal/Generic-S |
| Comodo | TrojWare.Win32.TrojanSpy.Ursnif.EM@7vyz23 |
| F-Secure | |
| TrendMicro | TSPY_FAREIT.THOIBOAH |
| McAfee-GW-Edition | BehavesLike.Win32.Generic.ch |
| Emsisoft | Trojan.BRMon.Gen.4 (B) |
| SentinelOne | Static AI – Malicious PE |
| Avira | HEUR/AGEN.1106537 |
| MAX | malware (ai score=80) |
| Antiy-AVL | Trojan[PSW]/Win32.Fareit |
| Microsoft | Trojan:Win32/Occamy.C |
| Arcabit | Trojan.BRMon.Gen.4 |
| AhnLab-V3 | Trojan/Win32.Ursnif.C2720809 |
| ZoneAlarm | Trojan-PSW.Win32.Fareit.ejwo |
| GData | Win32.Trojan-Ransom.GandCrab.O |
| Cynet | Malicious (score: 100) |
| ESET-NOD32 | a variant of Win32/Kryptik.GKVF |
| Acronis | suspicious |
| VBA32 | BScope.TrojanRansom.GandCrypt |
| ALYac | Trojan.BRMon.Gen.4 |
| Panda | Trj/GdSda.A |
| TrendMicro-HouseCall | TSPY_FAREIT.THOIBOAH |
| Tencent | Win32.Trojan-qqpass.Qqrob.Aihk |
| Yandex | Trojan.GenAsa!ei4eE51FG8s |
| Ikarus | Trojan.Win32.Ranumbot |
| Fortinet | W32/Kryptik.GMSM!tr |
| AVG | Win32:PWSX-gen [Trj] |
| Cybereason | malicious.4f52c8 |
| Paloalto | generic.ml |
| Qihoo-360 | Win32/Trojan.PSW.b81 |
How to remove Win32/Kryptik.GKVF ransomware?
There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft">2.
Download GridinSoft Anti-Malware.
You can download GridinSoft Anti-Malware by clicking the button below:
Download GridinSoft Anti-MalwareRun 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.
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.
Press “Install” button.
Once installed, Anti-Malware will automatically run.
Wait for the Anti-Malware scan to complete.
GridinSoft Anti-Malware will automatically start scanning your system for Win32/Kryptik.GKVF 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.
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.
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 Anti-Malware
If the guide doesn’t help you to remove Win32/Kryptik.GKVF you can always ask me in the comments for getting help.
References
- GridinSoft Anti-Malware Review from HowToFix site:
- More information about GridinSoft products:
