Worm:Win32/Arhost.C
James White
Updated on March 21, 2026
What is Worm:Win32/Arhost.C infection?
In this post you will find about the meaning of Worm:Win32/Arhost.C as well as its adverse influence on your computer. Such ransomware are a type of malware that is elaborated by on-line scams to require paying the ransom by a sufferer.
Most of the instances, Worm:Win32/Arhost.C infection will advise its targets to launch funds move for the objective of reducing the effects of the changes that the Trojan infection has introduced to the sufferer’s tool.
Worm:Win32/Arhost.C Summary
These alterations can be as complies with:
- 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.
- Injection (inter-process);
- Injection (Process Hollowing);
- Attempts to connect to a dead IP:Port (1 unique times);
- 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.
- The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
- Uses Windows utilities for basic functionality;
- Executed a process and injected code into it, probably while unpacking;
- Checks for the presence of known windows from debuggers and forensic tools;
- 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.
- Detects VirtualBox through the presence of a registry key;
- Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
- Ciphering the documents located on the sufferer’s hard disk — so the sufferer can no longer use the information;
- Preventing regular accessibility to the sufferer’s workstation;
| z.whorecord.xyz | Ransom:Win32/Blocker.9b81a272 |
| a.tomx.xyz | Ransom:Win32/Blocker.9b81a272 |
Worm:Win32/Arhost.C
The most typical networks through which Worm:Win32/Arhost.C are infused are:
- By means of phishing emails;
- As a repercussion of user ending up on a source that hosts a malicious software;
As quickly as the Trojan is efficiently infused, it will certainly either cipher the information on the victim’s computer or avoid the device from operating in a proper fashion – while likewise placing a ransom money note that points out the requirement for the targets to impact the settlement for the function of decrypting the files or recovering the data system back to the preliminary problem. In most instances, the ransom note will certainly turn up when the client restarts the COMPUTER after the system has already been harmed.
Worm:Win32/Arhost.C distribution channels.
In numerous edges of the globe, Worm:Win32/Arhost.C grows by leaps as well as bounds. Nevertheless, the ransom money notes and also techniques of extorting the ransom money amount may vary relying on particular local (local) settings. The ransom notes and also methods of obtaining the ransom money quantity may differ depending on particular neighborhood (local) settings.
For instance:
Faulty notifies about unlicensed software application.
In certain areas, the Trojans often wrongfully report having actually identified some unlicensed applications enabled on the target’s gadget. The alert after that requires the user to pay the ransom money.
Faulty declarations concerning unlawful content.
In countries where software program piracy is less popular, this approach is not as efficient for the cyber frauds. Alternatively, the Worm:Win32/Arhost.C popup alert might wrongly assert to be deriving from a law enforcement establishment and also will report having situated kid porn or other illegal information on the tool.
Worm:Win32/Arhost.C popup alert might falsely declare to be acquiring from a law enforcement institution and will report having situated youngster porn or other unlawful information on the device. The alert will in a similar way have a demand for the user to pay the ransom.
Technical details
File Info:
crc32: 58115EE8md5: f70204d61c2b140cef7216e7c56f1360name: F70204D61C2B140CEF7216E7C56F1360.mlwsha1: 8c82877acaaf3db78a34c3717ffd706ab0a87941sha256: 09d88d461539d9d1f47a1b49ea3267152c5c8d57fceb94688c006610f1901727sha512: 0601752a7c6fba01fc72aa3a3bb8186c493fda895c917a9af7af63c2466b9f86f4f7ff75ca5c892aed132f9300664f2cbfc81c40a56df6786745298d4c12fe4bssdeep: 3072:DRzDVV3vIV06KJpkHtRB+LaDsZWm+sgnhv/88:DpBV3vIVhKJaHtmLF1+Pnhbtype: PE32 executable (GUI) Intel 80386, for MS WindowsVersion Info:
0: [No Data]
Worm:Win32/Arhost.C also known as:
| GridinSoft | Trojan.Ransom.Gen |
| Bkav | W32.AIDetect.malware1 |
| K7AntiVirus | EmailWorm ( 003c363a1 ) |
| Elastic | malicious (high confidence) |
| DrWeb | BackDoor.HostBooter.2 |
| Cynet | Malicious (score: 100) |
| ALYac | Gen:Trojan.ProcessHijack.imX@amgoyKdi |
| Cylance | Unsafe |
| Zillya | Trojan.Blocker.Win32.35157 |
| Sangfor | Trojan.Win32.Save.a |
| CrowdStrike | win/malicious_confidence_100% (D) |
| Alibaba | Ransom:Win32/Blocker.9b81a272 |
| K7GW | EmailWorm ( 003c363a1 ) |
| Cybereason | malicious.61c2b1 |
| Symantec | ML.Attribute.HighConfidence |
| ESET-NOD32 | a variant of Win32/Injector.CILU |
| APEX | Malicious |
| Avast | Win32:Dropper-gen [Drp] |
| ClamAV | Win.Worm.Generickdv-9772477-0 |
| Kaspersky | Trojan-Ransom.Win32.Blocker.bbis |
| BitDefender | Gen:Trojan.ProcessHijack.imX@amgoyKdi |
| NANO-Antivirus | Trojan.Win32.Blocker.fhcfdt |
| MicroWorld-eScan | Gen:Trojan.ProcessHijack.imX@amgoyKdi |
| Tencent | Malware.Win32.Gencirc.114d331a |
| Ad-Aware | Gen:Trojan.ProcessHijack.imX@amgoyKdi |
| Sophos | ML/PE-A |
| Comodo | Malware@#1fequ8745fnnj |
| BitDefenderTheta | Gen:NN.ZevbaF.34690.imX@amgoyKdi |
| VIPRE | Trojan.Win32.Generic!BT |
| McAfee-GW-Edition | BehavesLike.Win32.VBObfus.cc |
| FireEye | Generic.mg.f70204d61c2b140c |
| Emsisoft | Gen:Trojan.ProcessHijack.imX@amgoyKdi (B) |
| SentinelOne | Static AI – Malicious PE |
| Jiangmin | Trojan.Blocker.ijn |
| Avira | HEUR/AGEN.1126329 |
| eGambit | Generic.Malware |
| Antiy-AVL | Trojan/Generic.ASMalwS.168C53 |
| Microsoft | Worm:Win32/Arhost.C |
| GData | Gen:Trojan.ProcessHijack.imX@amgoyKdi |
| AhnLab-V3 | Trojan/Win32.Blocker.C166023 |
| McAfee | GenericR-CUC!F70204D61C2B |
| MAX | malware (ai score=100) |
| VBA32 | Hoax.Blocker |
| Panda | Trj/Genetic.gen |
| Rising | Trojan.Win32.Generic.14924056 (C64:YzY0OmIl9mwH+C17) |
| Yandex | Trojan.GenAsa!DYTYYeYobh0 |
| Ikarus | Worm.Win32.Arhost |
| MaxSecure | Trojan.Malware.300983.susgen |
| Fortinet | W32/Generic.AP.1EADFC!tr |
| AVG | Win32:Dropper-gen [Drp] |
| Paloalto | generic.ml |
How to remove Worm:Win32/Arhost.C virus?
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 Worm:Win32/Arhost.C 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 Worm:Win32/Arhost.C you can always ask me in the comments for getting help.
References
- GridinSoft Anti-Malware Review from HowToFix site:
- More information about GridinSoft products:
