Win32/Injector.CAOL

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Win32/Injector.CAOL infection?

In this short article you will certainly locate concerning the interpretation of Win32/Injector.CAOL and its negative effect on your computer system. Such ransomware are a form of malware that is clarified by online fraudulences to demand paying the ransom by a sufferer.

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In the majority of the instances, Win32/Injector.CAOL infection will certainly instruct its targets to launch funds transfer for the objective of reducing the effects of the changes that the Trojan infection has presented to the target’s gadget.

Win32/Injector.CAOL 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);
  • 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.
  • Loads a driver;
  • Expresses interest in specific running processes;
  • 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.

  • 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.
  • Executed a process and injected code into it, probably while unpacking;
  • Code injection with CreateRemoteThread in a remote process;
  • A process attempted to delay the analysis task by a long amount of time.;
  • 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!
  • 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
  • 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 documents found on the sufferer’s disk drive — so the victim can no more utilize the data;
  • Preventing regular access to the victim’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.
Similar behavior
Related domains
z.whorecord.xyz Win32/Trojan.Ransom.207
a.tomx.xyz Win32/Trojan.Ransom.207
icomedic.com Win32/Trojan.Ransom.207

Win32/Injector.CAOL

One of the most typical channels whereby Win32/Injector.CAOL Ransomware are injected are:

  • By methods of phishing emails;
  • As an effect of customer winding up on a resource that organizes a malicious software program;

As soon as the Trojan is efficiently injected, it will certainly either cipher the information on the victim’s PC or stop the device from working in a correct manner – while likewise positioning a ransom note that mentions the requirement for the sufferers to effect the payment for the function of decrypting the papers or recovering the documents system back to the initial problem. In many instances, the ransom note will certainly turn up when the client restarts the COMPUTER after the system has already been damaged.

Win32/Injector.CAOL circulation networks.

In various corners of the world, Win32/Injector.CAOL expands by jumps and also bounds. However, the ransom notes as well as tricks of extorting the ransom amount may vary depending upon particular neighborhood (regional) setups. The ransom notes and also methods of obtaining the ransom money amount might differ depending on particular regional (regional) setups.

Ransomware injection

As an example:

    Faulty alerts regarding unlicensed software program.

    In specific areas, the Trojans often wrongfully report having detected some unlicensed applications made it possible for on the sufferer’s gadget. The alert after that requires the individual to pay the ransom.

    Faulty declarations about unlawful web content.

    In nations where software program piracy is much less popular, this technique is not as effective for the cyber fraudulences. Additionally, the Win32/Injector.CAOL popup alert may falsely declare to be originating from a police organization and will certainly report having situated youngster pornography or other illegal information on the tool.

    Win32/Injector.CAOL popup alert might falsely claim to be obtaining from a law enforcement organization and also will report having situated kid porn or other illegal information on the device. The alert will similarly contain a demand for the user to pay the ransom.

Technical details

File Info:

crc32: 2BEB5BC4
md5: 79c8661bd5e69df5bb94032a356adc33
name: nyf1.exe
sha1: 1efa8798d819147300a6aa27d0cc54f4b929badf
sha256: b3ee4352927895ace4609609ea3476e2724ee492cfb48a608ecd08827e112770
sha512: db4f8832de8c74e174a6f4356cbfc8044027a4f6c15374f6da9b2601b66162288c67df99679a68eb97ea713c9dbcca9f36d15bc426b3c86554a5532573d86f4a
ssdeep: 12288:83Nw5TIWrgjSQ3F5RhrK35xyET/T97L24928Tkr9IihCE:89ITIrjtFhrK3rzN7nTkBv
type: PE32 executable (GUI) Intel 80386, for MS Windows, Nullsoft Installer self-extracting archive

Version Info:

LegalCopyright: (c) AMD.All rights reserved.
FileVersion: 1.1.0.0
CompanyName: AMD
ProductName: AMD Driver Autodetect
ProductVersion: 1.1.0.0
FileDescription: AMD Driver Autodetect
Translation: 0x0000 0x04e4

Win32/Injector.CAOL also known as:

GridinSoft Trojan.Ransom.Gen
MicroWorld-eScan Trojan.GenericKD.32775412
CAT-QuickHeal Trojan.Generic
Qihoo-360 Win32/Trojan.Ransom.207
McAfee Artemis!79C8661BD5E6
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Malware
K7AntiVirus Riskware ( 0040eff71 )
BitDefender Trojan.GenericKD.32775412
K7GW Riskware ( 0040eff71 )
Cybereason malicious.bd5e69
Symantec Infostealer.Alina
APEX Malicious
Paloalto generic.ml
GData Trojan.GenericKD.32775412
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba Trojan:Win32/Injector.8f412fd5
NANO-Antivirus Trojan.Win32.CAOL.drqwlp
AegisLab Trojan.NSIS.Onion.j!c
Ad-Aware Trojan.GenericKD.32775412
Sophos Mal/Generic-S
Comodo Malware@#34nrerv0wjl1e
F-Secure Trojan.TR/Injector.43008.26
DrWeb Trojan.DownLoader13.52773
TrendMicro TSPY_ALINAOS.DEX
McAfee-GW-Edition Generic.eoo
FireEye Trojan.GenericKD.32775412
Emsisoft Trojan.GenericKD.32775412 (B)
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1018247
Arcabit Trojan.Generic.D1F41CF4
ZoneAlarm HEUR:Trojan.Win32.Generic
Microsoft Trojan:Win32/Tiggre!rfn
AhnLab-V3 Trojan/Win32.Injector.R147171
ALYac Trojan.GenericKD.32775412
MAX malware (ai score=100)
VBA32 Trojan.Downloader
Panda Trj/CI.A
ESET-NOD32 Win32/Injector.CAOL
TrendMicro-HouseCall TSPY_ALINAOS.DEX
Yandex Trojan.Injector!pVusIw9o5Jg
Ikarus Trojan.Win32.Injector
Fortinet W32/Injector.CAOL!tr
AVG Win32:Malware-gen
Avast Win32:Malware-gen
CrowdStrike win/malicious_confidence_90% (W)
MaxSecure Trojan.Malware.8447746.susgen

How to remove Win32/Injector.CAOL virus?

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.

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 Win32/Injector.CAOL 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 Win32/Injector.CAOL you can always ask me in the comments for getting help.

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/comparison

About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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