Backdoor:Win32/Hostil!A
Ava White
Updated on March 31, 2026
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.
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;
Backdoor:Win32/Hostil!A
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.
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: 50865B55md5: e65e29b71f02f45f9b8aaed2d0e1f6fename: E65E29B71F02F45F9B8AAED2D0E1F6FE.mlwsha1: 1f019072ac8d8d5e33b28c3061e3a30d0f14b1dcsha256: 0ebc638d3a0eefdf27bcf5a69b3748ac56c31e785605ad0aebdf3c492b94f5a5sha512: a3523ddb2beaad736e4e12aa0a0183bdaaf7fc098c5c818eec48c5c2254d877eb46db5bb03c80b342844be940c23af22d02bef12bcbbc1297927e7d660908f45ssdeep: 1536:dL5LszUt9iSze7BIdmoC+6Ph38YctRV+MKvA/di6ZEIEbCjbLJHt5NWBpS:dezE87GQ3pctCMKvA6IEbCjbdHtqBtype: PE32 executable (GUI) Intel 80386, for MS WindowsVersion 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 |
| McAfee-GW-Edition | BehavesLike.Win32.Generic.nc |
| FireEye | Generic.mg.e65e29b71f02f45f |
| 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 BackDoor.cz |
| 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] |
| Paloalto | generic.ml |
| Qihoo-360 | HEUR/Malware.QVM10.Gen |
How to remove Backdoor:Win32/Hostil!A ransomware?
There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft">2.
Download GridinSoft Anti-Malware.
You can download GridinSoft Anti-Malware by clicking the button below:
Download GridinSoft Anti-MalwareRun 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.
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.
Press “Install” button.
Once installed, Anti-Malware will automatically run.
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.
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.
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 Anti-Malware
If the guide doesn’t help you to remove Backdoor:Win32/Hostil!A you can always ask me in the comments for getting help.
References
- GridinSoft Anti-Malware Review from HowToFix site:
- More information about GridinSoft products:
