Win32/Kelihos.C

Written by Robert Bailey

What is Win32/Kelihos.C infection?

In this short article you will certainly find about the definition of Win32/Kelihos.C and also its unfavorable effect on your computer system. Such ransomware are a form of malware that is specified by on the internet fraudulences to demand paying the ransom by a victim.

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Most of the situations, Win32/Kelihos.C virus will certainly instruct its targets to initiate funds move for the objective of reducing the effects of the amendments that the Trojan infection has presented to the victim’s gadget.

Win32/Kelihos.C Summary

These alterations 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.
  • Attempts to connect to a dead IP:Port (14 unique times);
  • Starts servers listening on 127.0.0.1:0;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • Exhibits behavior characteristic of Kelihos malware;
  • 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
  • Installs WinPCAP;
  • Ciphering the documents located on the victim’s hard drive — so the victim can no longer use the data;
  • Preventing regular accessibility to the target’s workstation;

Win32/Kelihos.C

One of the most normal channels whereby Win32/Kelihos.C are infused are:

  • By means of phishing emails;
  • As a repercussion of individual ending up on a source that organizes a harmful software program;

As soon as the Trojan is effectively infused, it will either cipher the data on the sufferer’s computer or protect against the device from working in a correct fashion – while likewise placing a ransom money note that discusses the need for the sufferers to impact the settlement for the purpose of decrypting the records or restoring the data system back to the initial problem. In most instances, the ransom money note will certainly turn up when the customer reboots the PC after the system has actually already been harmed.

Win32/Kelihos.C circulation networks.

In different edges of the globe, Win32/Kelihos.C grows by jumps and bounds. However, the ransom money notes and also methods of obtaining the ransom money amount might vary relying on particular neighborhood (local) settings. The ransom money notes as well as methods of obtaining the ransom quantity may differ depending on particular local (local) setups.

Ransomware injection

As an example:

    Faulty alerts concerning unlicensed software.

    In particular locations, the Trojans usually wrongfully report having actually spotted some unlicensed applications allowed on the sufferer’s tool. The alert then demands the individual to pay the ransom.

    Faulty declarations concerning prohibited content.

    In countries where software application piracy is less preferred, this approach is not as efficient for the cyber scams. Alternatively, the Win32/Kelihos.C popup alert might falsely assert to be stemming from a law enforcement organization and will certainly report having located child porn or various other illegal data on the device.

    Win32/Kelihos.C popup alert may wrongly assert to be acquiring from a law enforcement institution and also will certainly report having located kid porn or other illegal information on the tool. The alert will likewise consist of a demand for the individual to pay the ransom.

Technical details

File Info:

crc32: 48506F64
md5: 16e855e5642ee6b21ccdfef286a5e505
name: 16E855E5642EE6B21CCDFEF286A5E505.mlw
sha1: 5b12cca3602c2119c08b37e10f987d4ae56f959e
sha256: eae15b3182b402e687336f242ab658f73590c3c882843a84eaea409cd387c0fc
sha512: 1eb9310e879b20494737d8fcd841fee3596ea70c5d570849598ee5ccf256f3cf1464e04318440b3ace871b69a26004e626f7ba713d464d7269333d53ab63f0a7
ssdeep: 24576:yuYcvy4Y9kDHYmm1rzMWVex5sCmQbN4hBAr/oeOPAQ5Q9Ts:yMhmN3MOyb2mDobPBQ
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: Copyright (C) 2010
InternalName: UIScanner
FileVersion: 13,0,21,1
CompanyName: BitDefender S.R.L.
ProductName: BitDefender 2010
ProductVersion: 13,0,18,344
FileDescription: BitDefender Antivirus Scanner
OriginalFilename: uiscan.exe
Translation: 0x0409 0x04b0

Win32/Kelihos.C also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 0026c9311 )
DrWeb BackDoor.Slym.16
Cynet Malicious (score: 100)
ALYac Gen:Heur.FKP.1
Cylance Unsafe
Zillya Backdoor.Bredolab.Win32.5251
Alibaba Trojan:Win32/Obfuscator.f08b26e1
K7GW Trojan ( 0026c9311 )
Cybereason malicious.5642ee
Cyren W32/S-bdcee22a!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Kelihos.C
APEX Malicious
Avast FileRepMetagen [Malware]
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Heur.FKP.1
NANO-Antivirus Trojan.Win32.Bredolab.daggt
MicroWorld-eScan Gen:Heur.FKP.1
Tencent Win32.Trojan.Generic.Eanw
Ad-Aware Gen:Heur.FKP.1
Sophos ML/PE-A + Mal/FakeAV-MR
Comodo MalCrypt.Indus!@1qrzi1
BitDefenderTheta Gen:NN.ZexaF.34692.9mKfaWw8Yrii
VIPRE Trojan.Win32.Ransom.do (v)
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
FireEye Generic.mg.16e855e5642ee6b2
Emsisoft Gen:Heur.FKP.1 (B)
SentinelOne Static AI – Suspicious PE
Webroot W32.Trojan.Gen
Avira TR/Crypt.XPACK.Gen
eGambit Generic.Malware
Antiy-AVL Trojan/Generic.ASMalwS.183998D
Microsoft Trojan:Win32/Occamy.C
AegisLab Trojan.Win32.Bredolab.m!c
GData Gen:Heur.FKP.1
AhnLab-V3 Trojan/Win32.FakeAV.R5556
McAfee FakeAV-SecurityTool.jq
MAX malware (ai score=100)
VBA32 Trojan.ExpProc.014
Malwarebytes Trojan.FakeAV
Panda Trj/CI.A
Rising Trojan.Win32.Generic.128CE4F4 (C64:YzY0Otg25BIxOtnW)
Ikarus Trojan.Win32.Yakes
Fortinet W32/BrowHost.KP!tr
AVG FileRepMetagen [Malware]
Paloalto generic.ml

How to remove Win32/Kelihos.C 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/Kelihos.C 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/Kelihos.C 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: http://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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