What is Backdoor:Win32/Xtrat.AC infection?

In this post you will discover regarding the interpretation of Backdoor:Win32/Xtrat.AC as well as its negative influence on your computer system. Such ransomware are a type of malware that is specified by on the internet frauds to demand paying the ransom by a target.

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In the majority of the instances, Backdoor:Win32/Xtrat.AC virus will advise its victims to initiate funds move for the purpose of reducing the effects of the amendments that the Trojan infection has introduced to the target’s device.

Backdoor:Win32/Xtrat.AC Summary

These modifications can be as adheres to:

  • 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.
  • Unconventionial language used in binary resources: Arabic (Iraq);
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • Uses Windows utilities for basic functionality;
  • Executed a process and injected code into it, probably while unpacking;
  • Code injection with CreateRemoteThread in a remote process;
  • 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.
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records found on the victim’s hard drive — so the sufferer can no more make use of the information;
  • Preventing regular accessibility to the victim’s workstation;


One of the most typical channels through which Backdoor:Win32/Xtrat.AC Ransomware are infused are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a repercussion of user ending up on a source that holds a malicious software;

As quickly as the Trojan is efficiently injected, it will certainly either cipher the data on the sufferer’s computer or avoid the tool from working in a correct manner – while additionally putting a ransom money note that discusses the requirement for the sufferers to impact the payment for the purpose of decrypting the files or bring back the data system back to the first condition. In most instances, the ransom note will certainly turn up when the customer restarts the PC after the system has actually currently been damaged.

Backdoor:Win32/Xtrat.AC circulation channels.

In various corners of the globe, Backdoor:Win32/Xtrat.AC grows by leaps and bounds. However, the ransom notes and also techniques of extorting the ransom money amount might vary relying on specific neighborhood (local) setups. The ransom money notes as well as tricks of extorting the ransom money amount may differ depending on certain local (regional) setups.

Ransomware injection

For example:

    Faulty alerts regarding unlicensed software program.

    In particular locations, the Trojans commonly wrongfully report having actually discovered some unlicensed applications allowed on the victim’s tool. The alert after that demands the user to pay the ransom.

    Faulty declarations concerning prohibited material.

    In countries where software piracy is much less prominent, this technique is not as effective for the cyber frauds. Alternatively, the Backdoor:Win32/Xtrat.AC popup alert may wrongly declare to be deriving from a police establishment and will certainly report having located youngster porn or other unlawful information on the device.

    Backdoor:Win32/Xtrat.AC popup alert might falsely assert to be acquiring from a legislation enforcement organization and will certainly report having situated youngster pornography or various other unlawful data on the gadget. The alert will similarly contain a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: 597A2E51
md5: 4fe282522965681cc68a81866292113e
name: 4FE282522965681CC68A81866292113E.mlw
sha1: f59e2a12b1ed4bed6241f0e2fca9b77a3f7f6c0c
sha256: 90718f930046250f6ae41c9069533271c9171c053332ebd78273a2f1bff2cb00
sha512: 72f5292b1627b688275f0a927919a89f3774944f92318cce01e07c809525783d25c28a45f9db358fd831ee6a65c7336d4b47a661feddf5fc23c643458ceb3c92
ssdeep: 12288:PBEJrXuWhKo5yM5QVuXDgmRKEAekO17D33w6fWoQ42CJ4hKU46gZtmSFFIvllah:6JaaFQGQggyVp18sQ4ShMZASFFQn
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

0: [No Data]

Backdoor:Win32/Xtrat.AC also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Riskware ( 0040eff71 )
DrWeb Trojan.DownLoader9.43701
Cynet Malicious (score: 85)
ALYac Gen:Variant.Ransom.Strictor.14
Cylance Unsafe
Zillya Backdoor.Xtreme.Win32.13408
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (W)
Alibaba Backdoor:Win32/Xtreme.3627df5c
K7GW Riskware ( 0040eff71 )
Cybereason malicious.229656
Cyren W32/Trojan.ITSH-2961
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/Remtasu.F
APEX Malicious
TotalDefense Win32/Tnega.RSLUYMB
Avast Win32:Malware-gen
Kaspersky Backdoor.Win32.Xtreme.arxz
BitDefender Gen:Variant.Ransom.Strictor.14
NANO-Antivirus Trojan.Win32.Androm.dnqrwy
ViRobot Backdoor.Win32.S.Xtreme.875008
MicroWorld-eScan Gen:Variant.Ransom.Strictor.14
Tencent Win32.Backdoor.Bp-fakems.Tnkq
Ad-Aware Gen:Variant.Ransom.Strictor.14
Comodo Malware@#hhbb3t21t4sd
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition RDN/Generic.bc
FireEye Gen:Variant.Ransom.Strictor.14
Emsisoft Gen:Variant.Ransom.Strictor.14 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Backdoor/Xtreme.bye
Webroot W32.Malware.Gen
Avira HEUR/AGEN.1129031
eGambit Generic.Malware
Microsoft Backdoor:Win32/Xtrat.AC
Arcabit Trojan.Ransom.Strictor.14
GData Gen:Variant.Ransom.Strictor.14
AhnLab-V3 Backdoor/Win32.Xtreme.R130406
McAfee RDN/Generic.bc
MAX malware (ai score=100)
VBA32 TScope.Trojan.Delf
Malwarebytes Malware.Heuristic.1003
Panda Trj/Genetic.gen
TrendMicro-HouseCall TROJ_FORUCON.BME
Rising Backdoor.Xtreme!8.25A (CLOUD)
Yandex Backdoor.Xtreme!9cFFnOu5LI4
Ikarus Backdoor.Win32.Xtreme
Fortinet W32/Injector.COBZ!tr
AVG Win32:Malware-gen
Qihoo-360 Win32/Backdoor.Xtreme.HgIASOUA

How to remove Backdoor:Win32/Xtrat.AC ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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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/Xtrat.AC 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/Xtrat.AC 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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