What is Backdoor:Win32/Caphaw.R infection?

In this short article you will certainly locate concerning the definition of Backdoor:Win32/Caphaw.R as well as its negative influence on your computer. Such ransomware are a kind of malware that is clarified by online frauds to require paying the ransom money by a victim.

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Most of the cases, Backdoor:Win32/Caphaw.R ransomware will instruct its victims to launch funds move for the purpose of neutralizing the changes that the Trojan infection has presented to the victim’s tool.

Backdoor:Win32/Caphaw.R Summary

These modifications can be as follows:

  • 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.
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Queries information on disks, possibly for anti-virtualization. Since VMs share the same disk space so it is expected that they won’t be getting as much space as an application running on
    native hardware will have access to.
  • Likely installs a bootkit via raw harddisk modifications;
  • 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.
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents located on the victim’s hard disk drive — so the victim can no longer use the information;
  • Preventing regular accessibility to the victim’s workstation;


The most common networks whereby Backdoor:Win32/Caphaw.R are infused are:

  • By methods of phishing emails;
  • As a repercussion of customer ending up on a resource that holds a harmful software;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the information on the sufferer’s PC or protect against the tool from operating in an appropriate fashion – while likewise putting a ransom money note that states the demand for the sufferers to effect the payment for the function of decrypting the documents or recovering the documents system back to the first problem. In a lot of instances, the ransom money note will show up when the customer reboots the PC after the system has already been harmed.

Backdoor:Win32/Caphaw.R circulation channels.

In various corners of the world, Backdoor:Win32/Caphaw.R expands by leaps and bounds. However, the ransom money notes as well as tricks of extorting the ransom money amount may vary depending on certain neighborhood (local) settings. The ransom money notes and also methods of extorting the ransom money amount might vary depending on specific neighborhood (regional) settings.

Ransomware injection

For instance:

    Faulty signals about unlicensed software application.

    In certain locations, the Trojans typically wrongfully report having actually discovered some unlicensed applications made it possible for on the victim’s device. The sharp then demands the individual to pay the ransom.

    Faulty declarations concerning prohibited content.

    In nations where software piracy is less prominent, this method is not as reliable for the cyber frauds. Alternatively, the Backdoor:Win32/Caphaw.R popup alert might incorrectly assert to be originating from a law enforcement establishment and will certainly report having situated youngster pornography or various other illegal information on the tool.

    Backdoor:Win32/Caphaw.R popup alert might incorrectly claim to be acquiring from a law enforcement establishment and will certainly report having located child porn or other prohibited information on the tool. The alert will in a similar way contain a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: 9725EBBC
md5: ca0403ea24fe2a7771b99cea55826c9b
name: f65fa71e8ffe11bb6e7c6c84c3d365f4fe729e1e9c38cb4f073d2b65058465fa
sha1: f8da98763e345f42c62db02e51bf5d80342cd4d2
sha256: f65fa71e8ffe11bb6e7c6c84c3d365f4fe729e1e9c38cb4f073d2b65058465fa
sha512: 3fe1bc108f1ad8e3c89bda5608897b0244fec9caa1a60e4537d2da7ce8052513218b70f5cbe35b1d650ba1ce7fdb889ab198fce564031371dba3b821c0320ada
ssdeep: 3072:IQf2nP4clkIOJ5NpJ70/94IU3sJGnlCv1vp9IPFpW5:IQeNl4NHw/94IU8JGivp9EFY5
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Backdoor:Win32/Caphaw.R also known as:

GridinSoft Trojan.Ransom.Gen
MicroWorld-eScan Gen:Heur.FKP.21
McAfee BackDoor-FHI.n
Cylance Unsafe
Sangfor Malware
K7AntiVirus Backdoor ( 003d8c2b1 )
BitDefender Gen:Heur.FKP.21
K7GW Backdoor ( 003d8c2b1 )
Cybereason malicious.a24fe2
Invincea heuristic
F-Prot W32/Caphaw.I
Symantec Trojan.Shylock!gen4
TotalDefense Win32/Caphaw.B!generic
APEX Malicious
ClamAV Win.Dropper.Daws-2
GData Gen:Heur.FKP.21
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba Backdoor:Win32/Caphaw.f3e6e114
NANO-Antivirus Trojan.Win32.DiskWriter.ejwywk
Avast Win32:Caphaw-X [Trj]
Tencent Win32.Trojan.Generic.Sxea
Endgame malicious (high confidence)
Emsisoft Gen:Heur.FKP.21 (B)
Comodo Malware@#1p2pnby6bg8qh
F-Secure Trojan.TR/Crypt.ZPACK.Gen8
DrWeb Trojan.AVKill.18882
Zillya Dropper.Daws.Win32.6846
TrendMicro TROJ_GEN.R002C0CKC19
McAfee-GW-Edition BehavesLike.Win32.Ransomware.dh
MaxSecure Trojan.Malware.10311303.susgen
Sophos Mal/EncPk-AER
SentinelOne DFI – Malicious PE
Cyren W32/Caphaw.PIVG-4171
Jiangmin TrojanDropper.Injector.accd
Webroot W32.Dropper.Gen
Avira TR/Crypt.ZPACK.Gen8
Antiy-AVL Trojan[Dropper]/Win32.Daws
Arcabit Trojan.FKP.21
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
Microsoft Backdoor:Win32/Caphaw.R
AhnLab-V3 Malware/Win32.Generic.C2587354
Acronis suspicious
BitDefenderTheta Gen:NN.ZexaF.34090.rqW@a4OyyIci
ALYac Gen:Heur.FKP.21
MAX malware (ai score=100)
VBA32 Trojan.DiskWriter
ESET-NOD32 Win32/Wolcape.B
TrendMicro-HouseCall TROJ_GEN.R002C0CKC19
Rising Backdoor.Caphaw!8.190 (CLOUD)
Yandex Trojan.DR.Daws!kH1eZJA6l0I
Ikarus Backdoor.Win32.Caphaw
eGambit Unsafe.AI_Score_99%
Fortinet W32/Caphaw.AER!tr
Ad-Aware Gen:Heur.FKP.21
AVG Win32:Caphaw-X [Trj]
Panda Trj/Caphaw.gen
CrowdStrike win/malicious_confidence_100% (W)
Qihoo-360 HEUR/Malware.QVM08.Gen

How to remove Backdoor:Win32/Caphaw.R 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

The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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.

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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/Caphaw.R 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/Caphaw.R 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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