Win32/Kryptik.FOFF

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

What is Win32/Kryptik.FOFF infection?

In this short article you will certainly find about the interpretation of Win32/Kryptik.FOFF as well as its unfavorable effect on your computer. Such ransomware are a type of malware that is specified by online fraudulences to demand paying the ransom money by a target.

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Most of the instances, Win32/Kryptik.FOFF ransomware will certainly advise its targets to start funds move for the function of neutralizing the modifications that the Trojan infection has actually introduced to the victim’s device.

Win32/Kryptik.FOFF 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.
  • 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 attempted to delay the analysis task.;
  • 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;
  • 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;
  • Creates a copy of itself;
  • Ciphering the files located on the target’s disk drive — so the sufferer can no more make use of 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.

Win32/Kryptik.FOFF

One of the most common channels through which Win32/Kryptik.FOFF Ransomware are injected are:

  • By ways of phishing e-mails;
  • As a consequence of individual ending up on a resource that hosts a destructive software;

As quickly as the Trojan is successfully infused, it will either cipher the data on the sufferer’s PC or protect against the tool from operating in a correct way – while also positioning a ransom money note that points out the demand for the targets to effect the repayment for the function of decrypting the papers or restoring the file system back to the initial problem. In the majority of circumstances, the ransom note will come up when the client restarts the PC after the system has actually currently been harmed.

Win32/Kryptik.FOFF circulation networks.

In numerous edges of the world, Win32/Kryptik.FOFF grows by leaps and also bounds. However, the ransom notes and tricks of extorting the ransom money amount might differ depending upon certain neighborhood (local) setups. The ransom money notes and tricks of obtaining the ransom quantity may vary depending on specific regional (regional) settings.

Ransomware injection

For instance:

    Faulty informs regarding unlicensed software program.

    In specific locations, the Trojans often wrongfully report having actually found some unlicensed applications enabled on the target’s tool. The alert then demands the customer to pay the ransom.

    Faulty statements regarding prohibited material.

    In nations where software program piracy is less preferred, this method is not as reliable for the cyber fraudulences. Alternatively, the Win32/Kryptik.FOFF popup alert may incorrectly claim to be originating from a law enforcement institution and also will certainly report having located kid pornography or various other unlawful data on the tool.

    Win32/Kryptik.FOFF popup alert might falsely declare to be deriving from a legislation enforcement establishment and also will report having situated child porn or various other unlawful data on the device. The alert will similarly consist of a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: 697CA48B
md5: 2f17b4f3bfb8fd1f6f80ab6c6c7839dd
name: 2F17B4F3BFB8FD1F6F80AB6C6C7839DD.mlw
sha1: 60e4bd48f449ecfca5862496f53a47023083a637
sha256: e10af6f7eab61e4a9ccc002adc7d9c7165144e46188217f7b4607200f5f68547
sha512: 95f90c1c241dd031294d94e893d6e8dc418704a18edf843afd1816ff0551f7b249f4b3dd593aa0e126bb9ff2ec2b4d1f38d31e15c34d8f39960a5cdd681cf093
ssdeep: 3072:BnnnnnuHJbxBeH0MM/UaozUCpFCbWO4/wGZ58HVcFFFrnb/swh/dKQV1Z+WI7qd:q9BeUFM9ACSg/fZBFzjHhlK5W1YMl
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.FOFF also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetect.malware1
Elasticmalicious (high confidence)
DrWebTrojan.PWS.Sphinx.2
MicroWorld-eScanTrojan.Ransom.Spora.Gen.1
FireEyeGeneric.mg.2f17b4f3bfb8fd1f
CAT-QuickHealRansom.Exxroute.A3
Qihoo-360Win32/Ransom.Spora.HxQBPpsA
McAfeeRansomware-FMJ!2F17B4F3BFB8
CylanceUnsafe
ZillyaTrojan.Droma.Win32.1274
SangforTrojan.Win32.Save.a
K7AntiVirusTrojan ( 0050d3751 )
AlibabaTrojan:Win32/Viknok.ffeb2afe
K7GWTrojan ( 00504f761 )
Cybereasonmalicious.3bfb8f
BitDefenderThetaGen:NN.ZexaF.34590.omW@a4H9GMki
CyrenW32/Nymaim.BZ.gen!Eldorado
SymantecPacked.Generic.493
APEXMalicious
AvastWin32:Filecoder-AY [Trj]
ClamAVWin.Ransomware.Cerber-9801465-0
KasperskyHEUR:Trojan.Win32.Generic
BitDefenderTrojan.Ransom.Spora.Gen.1
NANO-AntivirusTrojan.Win32.Sphinx.evdrvm
Paloaltogeneric.ml
TencentMalware.Win32.Gencirc.10baa8e4
Ad-AwareTrojan.Ransom.Spora.Gen.1
SophosMal/Generic-R + Mal/Elenoocka-E
ComodoTrojWare.Win32.Crypt.C@7vajd0
BaiduWin32.Trojan.Cerber.k
VIPRETrojan.Win32.Generic!BT
TrendMicroRansom_CERBER.SM4
McAfee-GW-EditionBehavesLike.Win32.Ransomware.dc
EmsisoftTrojan.Ransom.Spora.Gen.1 (B)
SentinelOneStatic AI – Malicious PE
GDataTrojan.Ransom.Spora.Gen.1
JiangminTrojan.Droma.th
WebrootTrojan.Dropper.Gen
AviraHEUR/AGEN.1116787
Antiy-AVLTrojan/Win32.Droma
ArcabitTrojan.Ransom.Spora.Gen.1
AegisLabTrojan.Win32.Generic.4!c
ZoneAlarmHEUR:Trojan.Win32.Generic
MicrosoftTrojan:Win32/Viknok.B
CynetMalicious (score: 100)
AhnLab-V3Trojan/Win32.Cerber.R195090
Acronissuspicious
VBA32BScope.Backdoor.Tofsee
ALYacTrojan.Ransom.Spora.Gen.1
MAXmalware (ai score=100)
MalwarebytesCerber.Ransom.Encrypt.DDS
ESET-NOD32a variant of Win32/Kryptik.FOFF
TrendMicro-HouseCallRansom_CERBER.SM4
RisingRansom.Cerber!8.3058 (CLOUD)
YandexTrojan.GenAsa!tZSZ6mnoS+8
IkarusTrojan.Ransom.Spora
FortinetW32/Kryptik.GKVH!tr
AVGWin32:Filecoder-AY [Trj]
PandaTrj/Genetic.gen
CrowdStrikewin/malicious_confidence_100% (D)

How to remove Win32/Kryptik.FOFF 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.FOFF 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.FOFF 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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