Win32/Injector.CTJR

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

What is Win32/Injector.CTJR infection?

In this article you will discover about the definition of Win32/Injector.CTJR as well as its unfavorable influence on your computer system. Such ransomware are a kind of malware that is clarified by on the internet scams to demand paying the ransom by a victim.

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In the majority of the situations, Win32/Injector.CTJR virus will advise its targets to initiate funds move for the objective of counteracting the changes that the Trojan infection has presented to the victim’s tool.

Win32/Injector.CTJR Summary

These adjustments 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Injection with CreateRemoteThread in a remote process;
  • Attempts to connect to a dead IP:Port (2 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.
  • Possible date expiration check, exits too soon after checking local time;
  • 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.
  • Performs some HTTP requests;
  • Unconventionial language used in binary resources: Russian;
  • Uses Windows utilities for basic functionality;
  • Executed a process and injected code into it, probably while unpacking;
  • 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
  • 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 papers found on the victim’s hard drive — so the victim can no longer make use of the data;
  • Preventing normal 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
ocsp.digicert.com Gen:Variant.Ransom.Cryak.48
dop.premiocastelloacaja.com Gen:Variant.Ransom.Cryak.48

Win32/Injector.CTJR

One of the most typical channels whereby Win32/Injector.CTJR Ransomware are infused are:

  • By methods of phishing emails;
  • As a repercussion of individual winding up on a source that organizes a malicious software;

As quickly as the Trojan is successfully infused, it will certainly either cipher the information on the victim’s computer or stop the device from operating in a proper manner – while additionally placing a ransom money note that discusses the demand for the sufferers to effect the payment for the function of decrypting the records or recovering the file system back to the preliminary problem. In most instances, the ransom note will certainly come up when the customer reboots the PC after the system has actually already been damaged.

Win32/Injector.CTJR distribution networks.

In numerous corners of the world, Win32/Injector.CTJR grows by leaps and also bounds. Nonetheless, the ransom notes and techniques of extorting the ransom amount might differ depending on specific regional (local) settings. The ransom money notes and also methods of obtaining the ransom quantity may vary depending on certain local (regional) settings.

Ransomware injection

For example:

    Faulty signals concerning unlicensed software program.

    In specific locations, the Trojans commonly wrongfully report having discovered some unlicensed applications allowed on the sufferer’s device. The alert then demands the individual to pay the ransom money.

    Faulty statements concerning prohibited material.

    In nations where software program piracy is less preferred, this technique is not as effective for the cyber scams. Alternatively, the Win32/Injector.CTJR popup alert may wrongly claim to be deriving from a law enforcement institution and also will certainly report having located youngster porn or various other illegal data on the device.

    Win32/Injector.CTJR popup alert might incorrectly declare to be obtaining from a legislation enforcement establishment as well as will certainly report having situated youngster porn or other unlawful data on the tool. The alert will likewise consist of a need for the customer to pay the ransom.

Technical details

File Info:

crc32: F6B13A87
md5: 4122b389db95396a02a4b4a03bcb4877
name: 4122B389DB95396A02A4B4A03BCB4877.mlw
sha1: 137dfe428f4b30ddc9c27221c7fdb57994b3d58d
sha256: a8f17e6f3cfab3ed3f0d6c315e16f1ae8d1298efb102e950a8b65736ccef0886
sha512: 1a02feda345af5cadd60f2171907fd51db88fd421a6e09f0c2d740965f448c7dcd30fdd13ac7dc1d9846e49f7aac82463f021888aebd39965e9fe32bfd0d02ae
ssdeep: 3072:7iZIYt1fg53ToSa9ECuYQCOGBakgGs7MlQmMt+V+jS:7iZPSAErY1OGBaDGscLMkD
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x0409 0x04b0
LegalCopyright: xa9 1990-2012 The raw and ready LPJ14 derives its timeless Les Paul-style tone from Gibson's new '61 Zebra humbucking pickups, craft
InternalName: XjqZBX4WB
FileVersion: 5.01.0308
CompanyName: flASh
Comments: Zebra humbucking
ProductName: Zebra
ProductVersion: 5.01.0308
FileDescription: timeless Les Paul-style tone from Gibson's new '61
OriginalFilename: XjqZBX4WB.exe

Win32/Injector.CTJR also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0055e3991 )
Elastic malicious (high confidence)
Cynet Malicious (score: 100)
ALYac Gen:Variant.Ransom.Cryak.48
Cylance Unsafe
Zillya Trojan.Scar.Win32.98884
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Trojan:Win32/Injector.7935c8a0
K7GW Trojan ( 0055e3991 )
Cybereason malicious.9db953
Cyren W32/Kovter.J.gen!Eldorado
Symantec Trojan.Kotver!gen8
ESET-NOD32 a variant of Win32/Injector.CTJR
APEX Malicious
Avast Win32:GenMalicious-NPN [Trj]
ClamAV Win.Trojan.Emotet-6444504-0
Kaspersky Trojan.Win32.Scar.ngxy
BitDefender Gen:Variant.Ransom.Cryak.48
NANO-Antivirus Trojan.Win32.Scar.earpjf
MicroWorld-eScan Gen:Variant.Ransom.Cryak.48
Tencent Win32.Trojan.Scar.Oyyc
Ad-Aware Gen:Variant.Ransom.Cryak.48
Sophos ML/PE-A + Mal/Ransom-EV
Comodo Malware@#16nl94xy8znis
BitDefenderTheta Gen:NN.ZevbaF.34738.jm3@aKJqRLlk
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.ch
FireEye Generic.mg.4122b389db95396a
Emsisoft Gen:Variant.Ransom.Cryak.48 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Scar.ech
Webroot Trojan.Dropper.Gen
Avira HEUR/AGEN.1127027
eGambit Unsafe.AI_Score_98%
Antiy-AVL Trojan/Generic.ASMalwS.1746FE5
Kingsoft Win32.Troj.Scar.ng.(kcloud)
Microsoft Trojan:Win32/Dynamer!ac
AegisLab Trojan.Win32.Scar.4!c
ZoneAlarm Trojan.Win32.Scar.ngxy
GData Gen:Variant.Ransom.Cryak.48
McAfee BackDoor-FHZL!4122B389DB95
MAX malware (ai score=100)
Panda Trj/CI.A
Yandex Trojan.Scar!OZXOZYU8f+8
Ikarus Trojan.Win32.Filecoder
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Scar.NGXY!tr
AVG Win32:GenMalicious-NPN [Trj]
Paloalto generic.ml

How to remove Win32/Injector.CTJR 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 Win32/Injector.CTJR 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.CTJR 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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