Written by Robert Bailey

What is Worm:MSIL/Knowlog.A infection?

In this article you will find concerning the definition of Worm:MSIL/Knowlog.A and its adverse effect on your computer. Such ransomware are a form of malware that is elaborated by on the internet frauds to demand paying the ransom by a target.

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Most of the situations, Worm:MSIL/Knowlog.A infection will certainly advise its targets to initiate funds transfer for the purpose of counteracting the modifications that the Trojan infection has actually introduced to the victim’s gadget.

Worm:MSIL/Knowlog.A Summary

These modifications can be as adheres to:

  • 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.
  • 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.
  • 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;
  • Ciphering the papers situated on the victim’s hard disk drive — so the victim can no longer utilize the data;
  • Preventing routine accessibility to the target’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.
Similar behavior
Related domains
automation.whatismyip.com Trojan-Ransom.Win32.Blocker.kqeh


The most regular channels through which Worm:MSIL/Knowlog.A Trojans are infused are:

  • By means of phishing emails;
  • As an effect of user winding up on a resource that organizes a harmful software program;

As soon as the Trojan is efficiently injected, it will certainly either cipher the information on the sufferer’s PC or avoid the device from functioning in a correct manner – while additionally putting a ransom note that mentions the need for the sufferers to impact the payment for the objective of decrypting the papers or recovering the documents system back to the preliminary problem. In many instances, the ransom note will certainly turn up when the customer reboots the COMPUTER after the system has actually currently been damaged.

Worm:MSIL/Knowlog.A circulation channels.

In numerous corners of the world, Worm:MSIL/Knowlog.A expands by jumps and bounds. Nonetheless, the ransom money notes as well as methods of obtaining the ransom quantity might differ depending on certain regional (regional) setups. The ransom money notes and methods of obtaining the ransom quantity might differ depending on specific local (local) settings.

Ransomware injection

As an example:

    Faulty notifies concerning unlicensed software.

    In certain locations, the Trojans frequently wrongfully report having detected some unlicensed applications enabled on the sufferer’s gadget. The alert then requires the customer to pay the ransom money.

    Faulty statements regarding illegal content.

    In countries where software application piracy is much less preferred, this method is not as reliable for the cyber scams. Additionally, the Worm:MSIL/Knowlog.A popup alert might wrongly claim to be originating from a police establishment as well as will certainly report having located youngster porn or other illegal data on the device.

    Worm:MSIL/Knowlog.A popup alert may incorrectly declare to be deriving from a law enforcement establishment and will report having located youngster pornography or various other prohibited data on the tool. The alert will in a similar way consist of a need for the individual to pay the ransom.

Technical details

File Info:

crc32: DCD2836E
md5: b7cd02414d36b2ec624140faebf175a1
name: B7CD02414D36B2EC624140FAEBF175A1.mlw
sha1: 4e6deb0737e724831dda45489e2d3686ca643234
sha256: 0a979377dfb37d034c29911e74193f82918289e72ed62092edacd322d36fb416
sha512: 2d76261135072fff2f5db3d9fc7c705397886dc247d0e891c52469f7954f44b4951267cc63464dd4c5267cf8aef0d0d599655fe0eaa54840821d8644c56f0348
ssdeep: 6144:t6ByCLWztvZLgnr9tDRTEf9n6evNZ6KZoS:Q0CktlytTg96evNZ6KZoS
type: PE32 executable (console) Intel 80386, for MS Windows, UPX compressed

Version Info:

0: [No Data]

Worm:MSIL/Knowlog.A also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0051918e1 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop7.57551
Cynet Malicious (score: 100)
ALYac Gen:Variant.Symmi.86895
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
K7GW Trojan ( 0051918e1 )
Cybereason malicious.14d36b
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Trojan.Jaiko-7603839-0
Kaspersky Trojan-Ransom.Win32.Blocker.kqeh
BitDefender Gen:Variant.Symmi.86895
NANO-Antivirus Trojan.Win32.Kryptik.ewvdar
MicroWorld-eScan Gen:Variant.Symmi.86895
Tencent Win32.Trojan.Blocker.Phqj
Ad-Aware Gen:Variant.Symmi.86895
Sophos Mal/Generic-S
Comodo Malware@#7b3x5359lbla
BitDefenderTheta Gen:NN.ZexaF.34684.mmGfamY5iep
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.cc
FireEye Generic.mg.b7cd02414d36b2ec
Emsisoft Gen:Variant.Symmi.86895 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Worm.Generic.dwh
Avira HEUR/AGEN.1115821
eGambit Unsafe.AI_Score_99%
Antiy-AVL Trojan/Win32.SchoolBoy
Microsoft Worm:MSIL/Knowlog.A
Arcabit Trojan.Symmi.D1536F
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm Trojan-Ransom.Win32.Blocker.kqeh
GData Gen:Variant.Symmi.86895
AhnLab-V3 Malware/Win32.RL_Generic.R267931
Acronis suspicious
McAfee Artemis!B7CD02414D36
MAX malware (ai score=96)
VBA32 Trojan.MulDrop
Malwarebytes Malware.AI.674547925
Panda Trj/CI.A
Rising Worm.Knowlog!8.261 (CLOUD)
Yandex Trojan.Blocker!LJJ99hxC4zU
Ikarus Trojan.Win32.Crypt
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Generic.AC.4030da!tr
AVG Win32:Malware-gen
Paloalto generic.ml

How to remove Worm:MSIL/Knowlog.A ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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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 Worm:MSIL/Knowlog.A 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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Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Worm:MSIL/Knowlog.A you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://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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