Written by Robert Bailey

What is MSIL/TrojanDropper.Agent.COX infection?

In this short article you will certainly locate about the meaning of MSIL/TrojanDropper.Agent.COX and its negative influence on your computer system. Such ransomware are a type of malware that is elaborated by online frauds to demand paying the ransom by a victim.

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When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
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In the majority of the situations, MSIL/TrojanDropper.Agent.COX infection will certainly instruct its victims to launch funds move for the objective of counteracting the changes that the Trojan infection has actually presented to the target’s gadget.

MSIL/TrojanDropper.Agent.COX Summary

These adjustments can be as adheres to:

  • The binary likely contains encrypted or compressed data.;
  • Network activity detected but not expressed in API logs;
  • Ciphering the papers located on the victim’s disk drive — so the sufferer can no more utilize the data;
  • Preventing regular access to the target’s workstation;


The most typical channels through which MSIL/TrojanDropper.Agent.COX Trojans are infused are:

  • By methods of phishing e-mails;
  • As an effect of user winding up on a resource that holds a malicious software program;

As soon as the Trojan is efficiently infused, it will certainly either cipher the information on the victim’s PC or prevent the device from functioning in a proper manner – while likewise positioning a ransom money note that points out the need for the sufferers to effect the payment for the function of decrypting the papers or bring back the data system back to the initial problem. In the majority of instances, the ransom money note will show up when the client restarts the COMPUTER after the system has already been harmed.

MSIL/TrojanDropper.Agent.COX circulation channels.

In numerous corners of the world, MSIL/TrojanDropper.Agent.COX expands by leaps and bounds. However, the ransom money notes and methods of extorting the ransom money quantity may differ depending on particular regional (regional) setups. The ransom money notes as well as methods of obtaining the ransom money amount might differ depending on certain local (regional) settings.

Ransomware injection

For example:

    Faulty signals concerning unlicensed software.

    In certain locations, the Trojans commonly wrongfully report having discovered some unlicensed applications allowed on the victim’s device. The sharp then requires the individual to pay the ransom money.

    Faulty statements regarding unlawful web content.

    In nations where software piracy is much less prominent, this technique is not as effective for the cyber frauds. Additionally, the MSIL/TrojanDropper.Agent.COX popup alert might falsely assert to be deriving from a law enforcement organization and also will report having situated child porn or various other illegal data on the device.

    MSIL/TrojanDropper.Agent.COX popup alert may falsely assert to be acquiring from a legislation enforcement institution and will certainly report having located child pornography or other illegal data on the device. The alert will in a similar way consist of a demand for the user to pay the ransom money.

Technical details

File Info:

crc32: 904F8F0E
md5: 4fabff2d62382a1dfc5bddcea90337ec
name: 4FABFF2D62382A1DFC5BDDCEA90337EC.mlw
sha1: d101b15aa5126c3f2158464a0d0a37033887b034
sha256: 67bc301c606aeba7de4ec47953174d85beb56bfe94f8fcf9b9ed2c9e18e0cdfa
sha512: 5fff7d263176d70e728de87face21ce4ef947cdc4f6bb4cb23a8467722636b97e2ebe65fd2a9ba64c9d89e90972482c54ed00c205a4579077aadc9e68757fe0e
ssdeep: 24576:pQbz/cjmUFgLTuMqIBFfZi/9D5Mun5C6ekLt833td4sAAHHpL83YE3CC:pQPcfauVIBDot5Mg5lekLt833/4OHJo
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright: Copyright xa9 2018
Assembly Version:
InternalName: Fssk.exe
ProductName: Fssk
FileDescription: Fssk
OriginalFilename: Fssk.exe

MSIL/TrojanDropper.Agent.COX also known as:

GridinSoft Trojan.Ransom.Gen
Lionic Trojan.Win32.Generic.lKGX
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader12.19594
ALYac Gen:Variant.MSILPerseus.168171
Cylance Unsafe
Zillya Dropper.Blocker.Win32.245
Sangfor Suspicious.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Ransom:MSIL/Blocker.d362a549
K7GW Trojan ( 004fe99a1 )
K7AntiVirus Trojan ( 004fe99a1 )
Cyren W32/MSIL_Troj.DL.gen!Eldorado
ESET-NOD32 a variant of MSIL/TrojanDropper.Agent.COX
APEX Malicious
Avast MSIL:Injector-KT [Trj]
Cynet Malicious (score: 100)
Kaspersky HEUR:Trojan-Ransom.MSIL.Blocker.gen
BitDefender Gen:Variant.MSILPerseus.168171
NANO-Antivirus Trojan.Win32.Dwn.fjboiz
MicroWorld-eScan Gen:Variant.MSILPerseus.168171
Tencent Msil.Trojan.Blocker.Phhb
Ad-Aware Gen:Variant.MSILPerseus.168171
Sophos ML/PE-A
Comodo Malware@#32vkp094gxhwj
BitDefenderTheta Gen:NN.ZemsilF.34142.zn0@aCXAmPh
TrendMicro Ransom_Blocker.R002C0GE721
Emsisoft Gen:Variant.MSILPerseus.168171 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.MSIL.khlz
Avira TR/Dropper.MSIL.Gen
eGambit Unsafe.AI_Score_99%
Antiy-AVL Trojan/Generic.ASMalwS.28922F6
Microsoft Backdoor:MSIL/Bladabindi!rfn
Arcabit Trojan.MSILPerseus.D290EB
GData Gen:Variant.MSILPerseus.168171
McAfee Artemis!4FABFF2D6238
MAX malware (ai score=100)
VBA32 TrojanRansom.MSIL.Blocker
Malwarebytes MachineLearning/Anomalous.100%
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom_Blocker.R002C0GE721
Ikarus Trojan-Dropper.MSIL.Agent
MaxSecure Trojan.Malware.300983.susgen
Fortinet MSIL/Generic.AP.A9C450A!tr
AVG MSIL:Injector-KT [Trj]

How to remove MSIL/TrojanDropper.Agent.COX 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 MSIL/TrojanDropper.Agent.COX 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove MSIL/TrojanDropper.Agent.COX you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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