Win32/Kryptik.GUHU

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Win32/Kryptik.GUHU infection?

In this post you will certainly discover regarding the interpretation of Win32/Kryptik.GUHU and its unfavorable impact on your computer system. Such ransomware are a form of malware that is clarified by online fraudulences to demand paying the ransom money by a sufferer.

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In the majority of the cases, Win32/Kryptik.GUHU ransomware will instruct its victims to start funds move for the function of counteracting the changes that the Trojan infection has actually introduced to the victim’s gadget.

Win32/Kryptik.GUHU 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.
  • Attempts to connect to a dead IP:Port (4 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.
  • Possible date expiration check, exits too soon after checking local time;
  • 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.
  • Performs some HTTP requests;
  • Executed a very long command line or script command which may be indicative of chained commands or obfuscation;
  • Uses Windows utilities for basic functionality;
  • Attempts to delete volume shadow copies;
  • Modifies boot configuration settings;
  • 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;
  • Clears Windows events or logs;
  • Creates a copy of itself;
  • 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 documents found on the target’s hard drive — so the victim can no longer utilize the data;
  • Preventing routine access to the sufferer’s workstation;
Similar behavior
Related domains
iplogger.ruTrojan-Ransom.Win32.Encoder.cya
iplogger.orgTrojan-Ransom.Win32.Encoder.cya
apps.identrust.comTrojan-Ransom.Win32.Encoder.cya
isrg.trustid.ocsp.identrust.comTrojan-Ransom.Win32.Encoder.cya
ocsp.int-x3.letsencrypt.orgTrojan-Ransom.Win32.Encoder.cya
redirector.gvt1.comTrojan-Ransom.Win32.Encoder.cya

Win32/Kryptik.GUHU

The most common channels whereby Win32/Kryptik.GUHU Ransomware Trojans are injected are:

  • By methods of phishing emails;
  • As a repercussion of individual ending up on a resource that hosts a destructive software application;

As quickly as the Trojan is effectively injected, it will either cipher the data on the victim’s computer or protect against the tool from working in a correct manner – while also putting a ransom note that states the requirement for the sufferers to impact the repayment for the function of decrypting the documents or recovering the data system back to the first problem. In the majority of circumstances, the ransom money note will certainly turn up when the client restarts the COMPUTER after the system has actually already been damaged.

Win32/Kryptik.GUHU circulation channels.

In various edges of the globe, Win32/Kryptik.GUHU expands by jumps and bounds. Nonetheless, the ransom notes and tricks of extorting the ransom money quantity might vary depending upon specific neighborhood (regional) settings. The ransom notes and tricks of extorting the ransom money amount might differ depending on particular regional (local) settings.

Ransomware injection

For example:

    Faulty informs regarding unlicensed software.

    In certain locations, the Trojans often wrongfully report having actually identified some unlicensed applications made it possible for on the target’s device. The sharp then demands the customer to pay the ransom money.

    Faulty statements about unlawful web content.

    In nations where software piracy is less prominent, this approach is not as reliable for the cyber fraudulences. Conversely, the Win32/Kryptik.GUHU popup alert may incorrectly declare to be originating from a police institution as well as will certainly report having situated child porn or various other prohibited information on the device.

    Win32/Kryptik.GUHU popup alert may falsely assert to be obtaining from a regulation enforcement organization and also will report having situated youngster porn or other prohibited data on the gadget. The alert will similarly consist of a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: 86765CFA
md5: 824c20b4ba06bd9ec5ed999cb7525b36
name: b.exe
sha1: c6e2707673294e7000d389405db0718c7c5a980c
sha256: 24d70038e548e6e1322e5922587d803f181a5a0d8ba95a1a264caa93ccc664a7
sha512: b523b224946e482411de1e34efc8cd40ee831b4c7c27bcbe3670fcb98b7ae9871d494bb4f4fe441c277ab846539a2d258be8967eb7c3e943eb25231c426cd82b
ssdeep: 3072:m87zzhhyoKQMl92cyrrabaDo8RKQELAW0NHMG/CifYNk1G84ot2fm/6X0Sk2LF:m8/zhQadRb1Ht0ot4YYX
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.GUHU also known as:

GridinSoftTrojan.Ransom.Gen
DrWebTrojan.Encoder.28645
MicroWorld-eScanTrojan.GenericKD.41404348
FireEyeGeneric.mg.824c20b4ba06bd9e
Qihoo-360HEUR/QVM19.1.27DB.Malware.Gen
McAfeeRDN/Generic.fap
VIPRETrojan.Win32.Generic!BT
SangforMalware
K7AntiVirusTrojan ( 005511e81 )
BitDefenderTrojan.GenericKD.41404348
K7GWTrojan ( 005511e81 )
CrowdStrikewin/malicious_confidence_100% (W)
TrendMicroTrojan.Win32.WACATAC.USXVPFS19
BitDefenderThetaGen:NN.ZexaF.33558.ruW@aCtj8waG
CyrenW32/Trojan.YLYU-0129
SymantecML.Attribute.HighConfidence
APEXMalicious
AvastWin32:Malware-gen
GDataTrojan.GenericKD.41404348
KasperskyTrojan-Ransom.Win32.Encoder.cya
AlibabaRansom:Win32/Encoder.4a4e8bc5
NANO-AntivirusTrojan.Win32.Encoder.frygji
AegisLabTrojan.Win32.Malicious.4!c
RisingTrojan.Generic@ML.85 (RDMK:eF1I3uGNKdK4lA47GWVw9g)
Ad-AwareTrojan.GenericKD.41404348
EmsisoftTrojan.GenericKD.41404348 (B)
ComodoMalware@#2ni2mokcmo0uh
F-SecureTrojan.TR/AD.ZardRansom.uumrf
ZillyaTrojan.Encoder.Win32.941
Invinceaheuristic
McAfee-GW-EditionBehavesLike.Win32.Pate.dm
SophosMal/Generic-S
IkarusTrojan.Win32.Krypt
WebrootW32.Trojan.Emotet
AviraTR/AD.ZardRansom.uumrf
Endgamemalicious (high confidence)
ArcabitTrojan.Generic.D277C7BC
ZoneAlarmTrojan-Ransom.Win32.Encoder.cya
MicrosoftTrojan:Win32/Occamy.C
AhnLab-V3Malware/Win32.Generic.C3314923
VBA32BScope.Trojan.Wacatac
ALYacTrojan.Ransom.VegaLocker
PandaTrj/CI.A
ESET-NOD32a variant of Win32/Kryptik.GUHU
TrendMicro-HouseCallTrojan.Win32.WACATAC.USXVPFS19
SentinelOneDFI – Malicious PE
AVGWin32:Malware-gen
Cybereasonmalicious.673294
Paloaltogeneric.ml
MaxSecureVirus.Patched.OF

How to remove Win32/Kryptik.GUHU 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

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.

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.GUHU 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 Win32/Kryptik.GUHU 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/comparison

About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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