Backdoor:Win32/Kelihos.F Virus Removal

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

Spectating the Backdoor:Win32/Kelihos.F malware detection usually means that your computer is in big danger. This computer virus can correctly be identified as ransomware – sort of malware which ciphers your files and forces you to pay for their decryption. Deleteing it requires some specific steps that must be taken as soon as possible.

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Backdoor:Win32/Kelihos.F detection is a malware detection you can spectate in your computer. It often shows up after the preliminary procedures on your computer – opening the untrustworthy email, clicking the advertisement in the Internet or setting up the program from unreliable sources. From the second it appears, you have a short time to do something about it before it begins its harmful action. And be sure – it is much better not to wait for these malicious effects.

What is Backdoor:Win32/Kelihos.F virus?

Backdoor:Win32/Kelihos.F is ransomware-type malware. It searches for the documents on your disk, encrypts it, and after that asks you to pay the ransom for getting the decryption key. Besides making your documents inaccessible, this virus additionally does a lot of harm to your system. It alters the networking settings in order to prevent you from reading the removal guidelines or downloading the anti-malware program. In some cases, Backdoor:Win32/Kelihos.F can even block the setup of anti-malware programs.

Backdoor:Win32/Kelihos.F Summary

In total, Backdoor:Win32/Kelihos.F virus activities in the infected PC are next:

  • Behavioural detection: Executable code extraction – unpacking;
  • A file was accessed within the Public folder.;
  • Reads data out of its own binary image;
  • CAPE extracted potentially suspicious content;
  • The binary likely contains encrypted or compressed data.;
  • Authenticode signature is invalid;
  • Attempts to access Bitcoin/ALTCoin wallets;
  • Harvests credentials from local FTP client softwares;
  • Installs WinPCAP;
  • Anomalous binary characteristics;
  • Yara rule detections observed from a process memory dump/dropped files/CAPE;
  • Ciphering the documents kept on the victim’s drive — so the victim cannot use these files;
  • Blocking the launching of .exe files of anti-malware programs
  • Blocking the launching of installation files of anti-virus apps

Ransomware has actually been a headache for the last 4 years. It is hard to imagine a more hazardous malware for both individual users and corporations. The algorithms used in Backdoor:Win32/Kelihos.F (typically, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need more time than our galaxy currently exists, and possibly will exist. But that virus does not do all these horrible things instantly – it may take up to several hours to cipher all of your files. Hence, seeing the Backdoor:Win32/Kelihos.F detection is a clear signal that you must start the removal procedure.

Where did I get the Backdoor:Win32/Kelihos.F?

Ordinary ways of Backdoor:Win32/Kelihos.F spreading are usual for all other ransomware variants. Those are one-day landing sites where victims are offered to download the free software, so-called bait e-mails and hacktools. Bait e-mails are a quite modern tactic in malware distribution – you receive the email that imitates some standard notifications about shipments or bank service conditions modifications. Within the email, there is an infected MS Office file, or a web link which opens the exploit landing site.

Malicious email spam

Malicious email message. This one tricks you to open the phishing website.

Avoiding it looks fairly uncomplicated, however, still demands a lot of awareness. Malware can hide in different spots, and it is far better to prevent it even before it invades your computer than to trust in an anti-malware program. Standard cybersecurity awareness is just an important item in the modern world, even if your relationship with a PC stays on YouTube videos. That can save you a great deal of time and money which you would spend while searching for a fixing guide.

Backdoor:Win32/Kelihos.F malware technical details

File Info:

name: 8BA2C02BB1C698BF648F.mlw
path: /opt/CAPEv2/storage/binaries/1ebddc4c8d0f4562c776a50fd2473b25aefa72e954512e6737e30b833c8b021b
crc32: 4D9FEC54
md5: 8ba2c02bb1c698bf648f8a6e732d9ee4
sha1: 2c43d0cbc871e100d5330608c9b53374867f8e8f
sha256: 1ebddc4c8d0f4562c776a50fd2473b25aefa72e954512e6737e30b833c8b021b
sha512: a0a95132e747697dfa2f60e8eecb409c9e4a2e32ecd3ca76034c6cb45ae099974e9fc3cec04d4176597cc010c99e77168c1a18d81b9c212fdacc564fb15da654
ssdeep: 12288:nNb/Rq+6eAI/IaJZxeRlHWPYvHqz8EatF1UAohPt7hjSaHD2U0bc:NbZqJeu+Zx2lHQQqAt7yTfAc
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T169F42393846758C1E0E59F75206E4E6AA722BD16AB26CDFCB4BE303E177DBC210951F0
sha3_384: c4dfc70ed07e9feca6cffb36e9622fbb716aabf82e967249f38837d775708756b454a40447ee56cbdb1d485bcee4e669
ep_bytes: bffc3f400083c7045768143140005f83
timestamp: 2012-10-02 22:22:22

Version Info:

0: [No Data]

Backdoor:Win32/Kelihos.F also known as:

BkavW32.AIDetectMalware
LionicTrojan.Win32.Generic.lmka
CAT-QuickHealTrojan.Urausy.C
ALYacGen:Heur.Honret.2
Cylanceunsafe
SangforTrojan.Win32.Save.a
K7AntiVirusTrojan ( 0040f2c01 )
AlibabaBackdoor:Win32/Kelihos.06afa678
K7GWTrojan ( 0040f2c01 )
Cybereasonmalicious.bb1c69
BitDefenderThetaGen:NN.ZexaF.36348.UuW@ayNr6zb
CyrenW32/FakeAlert.WV.gen!Eldorado
SymantecML.Attribute.HighConfidence
Elasticmalicious (high confidence)
ESET-NOD32a variant of Win32/Kryptik.ATDT
APEXMalicious
CynetMalicious (score: 100)
KasperskyTrojan-Ransom.Win32.Agent.hsk
BitDefenderGen:Heur.Honret.2
NANO-AntivirusTrojan.Win32.MlwGen.crjgoa
MicroWorld-eScanGen:Heur.Honret.2
AvastWin32:Kryptik-LBI [Trj]
TencentMalware.Win32.Gencirc.10be5c9b
EmsisoftGen:Heur.Honret.2 (B)
F-SecureTrojan.TR/Winwebsec.445879
DrWebBackDoor.Slym.1387
VIPREGen:Heur.Honret.2
TrendMicroWORM_KREPTK.SM
McAfee-GW-EditionBehavesLike.Win32.PdfCrypt.bc
Trapminemalicious.high.ml.score
FireEyeGeneric.mg.8ba2c02bb1c698bf
SophosTroj/Ransom-MV
SentinelOneStatic AI – Malicious PE
JiangminTrojan/Tepfer.Gen
AviraTR/Winwebsec.445879
Antiy-AVLTrojan/Win32.Kryptik
MicrosoftBackdoor:Win32/Kelihos.F
XcitiumTrojWare.Win32.Kryptik.ASTY@4tdntw
ArcabitTrojan.Honret.2
SUPERAntiSpywareTrojan.Agent/Gen-RogueRel
ZoneAlarmTrojan-Ransom.Win32.Agent.hsk
GDataGen:Heur.Honret.2
GoogleDetected
AhnLab-V3Trojan/Win32.Tepfer.R50361
McAfeeBackDoor-FJW
VBA32Heur.Trojan.Hlux
MalwarebytesGeneric.Malware.AI.DDS
PandaTrj/Tepfer.A
TrendMicro-HouseCallWORM_KREPTK.SM
RisingRansom.Agent!8.6B7 (TFE:3:Gt0iXDmEqMU)
YandexTrojan.GenAsa!35qNgOsVyPc
IkarusTrojan-PSW.Win32.Tepfer
FortinetW32/Krypt.HAHA!tr
AVGWin32:Kryptik-LBI [Trj]
DeepInstinctMALICIOUS
CrowdStrikewin/malicious_confidence_100% (D)

How to remove Backdoor:Win32/Kelihos.F?

Backdoor:Win32/Kelihos.F malware is incredibly difficult to delete manually. It stores its files in a variety of locations throughout the disk, and can restore itself from one of the parts. In addition, a number of alterations in the registry, networking setups and also Group Policies are really hard to discover and return to the initial. It is much better to make use of a special program – exactly, an anti-malware tool. GridinSoft Anti-Malware will fit the most ideal for malware elimination purposes.

Remove Backdoor:Win32/Kelihos.F with Gridinsoft Anti-Malware

We have also been using this software on our systems ever since, and it has always been successful in detecting viruses. It has blocked the most common Trojans as shown from our tests with the software, and we assure you that it can remove Backdoor:Win32/Kelihos.F as well as other malware hiding on your computer.

Gridinsoft Anti-Malware - Main Screen

To use Gridinsoft for remove malicious threats, follow the steps below:

1. Begin by downloading Gridinsoft Anti-Malware, accessible via the blue button below or directly from the official website gridinsoft.com.

2.Once the Gridinsoft setup file (setup-gridinsoft-fix.exe) is downloaded, execute it by clicking on the file.

setup-gridinsoft-fix.exe

3.Follow the installation setup wizard's instructions diligently.

Gridinsoft Setup Wizard

4. Access the "Scan Tab" on the application's start screen and launch a comprehensive "Full Scan" to examine your entire computer. This inclusive scan encompasses the memory, startup items, the registry, services, drivers, and all files, ensuring that it detects malware hidden in all possible locations.

Scan for Backdoor:Win32/Kelihos.F Trojans

Be patient, as the scan duration depends on the number of files and your computer's hardware capabilities. Use this time to relax or attend to other tasks.

5. Upon completion, Anti-Malware will present a detailed report containing all the detected malicious items and threats on your PC.

The Backdoor:Win32/Kelihos.F was Found

6. Select all the identified items from the report and confidently click the "Clean Now" button. This action will safely remove the malicious files from your computer, transferring them to the secure quarantine zone of the anti-malware program to prevent any further harmful actions.

The Backdoor:Win32/Kelihos.F has been removed

8. If prompted, restart your computer to finalize the full system scan procedure. This step is crucial to ensure thorough removal of any remaining threats. After the restart, Gridinsoft Anti-Malware will open and display a message confirming the completion of the scan.

Remember Gridinsoft offers a 6-day free trial. This means you can take advantage of the trial period at no cost to experience the full benefits of the software and prevent any future malware infections on your system. Embrace this opportunity to fortify your computer's security without any financial commitment.

Trojan Killer for “Backdoor:Win32/Kelihos.F” removal on locked PC

In situations where it becomes impossible to download antivirus applications directly onto the infected computer due to malware blocking access to websites, an alternative solution is to utilize the Trojan Killer application.

Trojan Killer - Main View

There is a really little number of security tools that are able to be set up on the USB drives, and antiviruses that can do so in most cases require to obtain quite an expensive license. For this instance, I can recommend you to use another solution of GridinSoft - Trojan Killer Portable. It has a 14-days cost-free trial mode that offers the entire features of the paid version. This term will definitely be 100% enough to wipe malware out.

Trojan Killer is a valuable tool in your cybersecurity arsenal, helping you to effectively remove malware from infected computers. Now, we will walk you through the process of using Trojan Killer from a USB flash drive to scan and remove malware on an infected PC. Remember, always obtain permission to scan and remove malware from a computer that you do not own.

Step 1: Download & Install Trojan Killer on a Clean Computer:

1. Go to the official GridinSoft website (gridinsoft.com) and download Trojan Killer to a computer that is not infected.

Download Trojan Killer

2. Insert a USB flash drive into this computer.

3. Install Trojan Killer to the "removable drive" following the on-screen instructions.

Install Trojan Killer to Removable Drive

4. Once the installation is complete, launch Trojan Killer.

Step 2: Update Signature Databases:

5. After launching Trojan Killer, ensure that your computer is connected to the Internet.

6. Click "Update" icon to download the latest signature databases, which will ensure the tool can detect the most recent threats.

Click Update Button

Step 3: Scan the Infected PC:

7. Safely eject the USB flash drive from the clean computer.

8. Boot the infected computer to the Safe Mode.

9. Insert the USB flash drive.

10. Run tk.exe

11. Once the program is open, click on "Full Scan" to begin the malware scanning process.

Searching Backdoor:Win32/Kelihos.F Virus

Step 4: Remove Found Threats:

12. After the scan is complete, Trojan Killer will display a list of detected threats.

Searching Backdoor:Win32/Kelihos.F Finished

13. Click on "Cure PC!" to remove the identified malware from the infected PC.

14. Follow any additional on-screen prompts to complete the removal process.

Restart needed

Step 5: Restart Your Computer:

15. Once the threats are removed, click on "Restart PC" to reboot your computer.

16. Remove the USB flash drive from the infected computer.

Congratulations on effectively removing Backdoor:Win32/Kelihos.F and the concealed threats from your computer! You can now have peace of mind, knowing that they won't resurface again. Thanks to Gridinsoft's capabilities and commitment to cybersecurity, your system is now protected.

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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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