What is Backdoor:Win32/Hostil!A infection?

In this article you will certainly find regarding the definition of Backdoor:Win32/Hostil!A as well as its negative effect on your computer system. Such ransomware are a form of malware that is elaborated by on the internet frauds to require paying the ransom money by a sufferer.

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Most of the cases, Backdoor:Win32/Hostil!A ransomware will advise its victims to start funds move for the function of neutralizing the modifications that the Trojan infection has actually introduced to the victim’s device.

Backdoor:Win32/Hostil!A Summary

These modifications can be as complies with:

  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Injection with CreateRemoteThread in a remote process;
  • 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.;
  • 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.
  • Executed a process and injected code into it, probably while unpacking;
  • Deletes its original binary from disk;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Mimics the file times of a Windows system file;
  • 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
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records located on the victim’s hard drive — so the sufferer can no longer use the information;
  • Preventing regular accessibility to the victim’s workstation;


One of the most regular channels whereby Backdoor:Win32/Hostil!A Ransomware Trojans are infused are:

  • By ways of phishing e-mails;
  • As a repercussion of customer winding up on a source that holds a harmful software;

As soon as the Trojan is efficiently injected, it will either cipher the information on the sufferer’s PC or avoid the device from operating in an appropriate way – while also positioning a ransom note that discusses the demand for the sufferers to impact the settlement for the function of decrypting the papers or bring back the documents system back to the initial condition. In the majority of instances, the ransom note will show up when the customer reboots the PC after the system has currently been harmed.

Backdoor:Win32/Hostil!A circulation channels.

In numerous corners of the world, Backdoor:Win32/Hostil!A expands by leaps and bounds. Nonetheless, the ransom money notes and also methods of extorting the ransom amount may differ depending upon particular regional (regional) settings. The ransom notes and also tricks of extorting the ransom amount may vary depending on particular local (regional) setups.

Ransomware injection

For instance:

    Faulty alerts about unlicensed software.

    In certain areas, the Trojans usually wrongfully report having spotted some unlicensed applications made it possible for on the sufferer’s device. The sharp then demands the customer to pay the ransom.

    Faulty declarations regarding prohibited material.

    In nations where software piracy is less prominent, this method is not as efficient for the cyber frauds. Alternatively, the Backdoor:Win32/Hostil!A popup alert may wrongly claim to be originating from a law enforcement institution and will report having situated kid pornography or other unlawful data on the device.

    Backdoor:Win32/Hostil!A popup alert may wrongly claim to be obtaining from a law enforcement institution as well as will report having located child porn or other prohibited data on the gadget. The alert will likewise contain a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 50865B55
md5: e65e29b71f02f45f9b8aaed2d0e1f6fe
name: E65E29B71F02F45F9B8AAED2D0E1F6FE.mlw
sha1: 1f019072ac8d8d5e33b28c3061e3a30d0f14b1dc
sha256: 0ebc638d3a0eefdf27bcf5a69b3748ac56c31e785605ad0aebdf3c492b94f5a5
sha512: a3523ddb2beaad736e4e12aa0a0183bdaaf7fc098c5c818eec48c5c2254d877eb46db5bb03c80b342844be940c23af22d02bef12bcbbc1297927e7d660908f45
ssdeep: 1536:dL5LszUt9iSze7BIdmoC+6Ph38YctRV+MKvA/di6ZEIEbCjbLJHt5NWBpS:dezE87GQ3pctCMKvA6IEbCjbdHtqB
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Backdoor:Win32/Hostil!A also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 003aebf01 )
Elastic malicious (high confidence)
DrWeb Trojan.MBRlock.103
Cynet Malicious (score: 100)
ALYac Trojan.Generic.KDZ.8049
Cylance Unsafe
Zillya Trojan.Foreign.Win32.3380
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (D)
Alibaba Trojan:Win32/Trustezeb.ab15af6c
K7GW Trojan ( 003aebf01 )
Cybereason malicious.71f02f
Cyren W32/Trojan.AQOD-1483
Symantec Trojan.Ransomlock
ESET-NOD32 Win32/Trustezeb.C
APEX Malicious
Avast Win32:Rootkit-gen [Rtk]
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.Generic.KDZ.8049
NANO-Antivirus Virus.Win32.Gen-Crypt.ccnc
MicroWorld-eScan Trojan.Generic.KDZ.8049
Tencent Win32.Trojan.Generic.Ajlm
Ad-Aware Trojan.Generic.KDZ.8049
Sophos Mal/Generic-R + Troj/Foreign-B
Comodo Suspicious@#cu37tk0fqxkx
BitDefenderTheta Gen:NN.ZexaF.34628.fyW@ay9N30gi
VIPRE Trojan-PWS.Win32.Zbot.asv (v)
TrendMicro TROJ_SPNR.35CA13
Emsisoft Trojan.Generic.KDZ.8049 (B)
SentinelOne Static AI – Suspicious PE
Webroot W32.Fakealert.Gen
Avira TR/Matsnu.EB.111
eGambit Generic.Malware
Microsoft Backdoor:Win32/Hostil.gen!A
Arcabit Trojan.Generic.KDZ.D1F71
AegisLab Trojan.Win32.Foreign.j!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.Generic.KDZ.8049
TACHYON Trojan/W32.Foreign.97280.D
AhnLab-V3 Trojan/Win32.Foreign.R54596
Acronis suspicious
McAfee Generic
MAX malware (ai score=100)
VBA32 BScope.Trojan.Download
Malwarebytes Malware.AI.3225231697
Panda Trj/Genetic.gen
TrendMicro-HouseCall TROJ_SPNR.35CA13
Rising Trojan.Bulta!8.35D (CLOUD)
Ikarus Trojan-Ransom.Foreign
Fortinet W32/Injector.ZVR!tr
AVG Win32:Rootkit-gen [Rtk]
Qihoo-360 HEUR/Malware.QVM10.Gen

How to remove Backdoor:Win32/Hostil!A 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 Backdoor:Win32/Hostil!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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If the guide doesn’t help you to remove Backdoor:Win32/Hostil!A you can always ask me in the comments for getting help.

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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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