Win32/Injector.CTAU

Written by Robert Bailey

What is Win32/Injector.CTAU infection?

In this post you will certainly locate about the definition of Win32/Injector.CTAU and its adverse impact on your computer system. Such ransomware are a type of malware that is specified by online frauds to demand paying the ransom money by a victim.

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In the majority of the cases, Win32/Injector.CTAU virus will instruct its victims to initiate funds move for the purpose of neutralizing the changes that the Trojan infection has presented to the sufferer’s device.

Win32/Injector.CTAU Summary

These adjustments 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);
  • Compression (or decompression);
  • 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.

  • A process created a hidden window;
  • Unconventionial language used in binary resources: Chinese (Simplified);
  • Uses Windows utilities for basic functionality;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Attempts to delete volume shadow copies;
  • Executed a process and injected code into it, probably while unpacking;
  • Exhibits behavior characteristic of Alphacrypt/Teslacrypt ransomware;
  • 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
  • Writes a potential ransom message to disk;
  • 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.
  • Attempts to identify installed AV products by registry key;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the files situated on the sufferer’s hard disk — so the target can no more make use of the information;
  • Preventing regular accessibility to the victim’s workstation;

Win32/Injector.CTAU

The most normal networks where Win32/Injector.CTAU Ransomware are infused are:

  • By means of phishing e-mails;
  • As a consequence of user winding up on a source that holds a harmful software;

As quickly as the Trojan is efficiently injected, it will either cipher the data on the target’s PC or prevent the gadget from working in a proper manner – while additionally putting a ransom note that discusses the need for the victims to effect the payment for the function of decrypting the files or recovering the data system back to the preliminary problem. In the majority of circumstances, the ransom money note will certainly turn up when the customer reboots the PC after the system has actually currently been harmed.

Win32/Injector.CTAU circulation networks.

In numerous edges of the globe, Win32/Injector.CTAU grows by leaps and also bounds. Nonetheless, the ransom money notes as well as methods of obtaining the ransom money quantity may differ depending upon certain neighborhood (regional) setups. The ransom notes and methods of obtaining the ransom quantity might differ depending on specific neighborhood (local) setups.

Ransomware injection

For example:

    Faulty notifies about unlicensed software.

    In specific locations, the Trojans often wrongfully report having actually identified some unlicensed applications allowed on the target’s gadget. The sharp then demands the user to pay the ransom.

    Faulty statements about unlawful web content.

    In nations where software program piracy is much less preferred, this approach is not as efficient for the cyber fraudulences. Additionally, the Win32/Injector.CTAU popup alert may wrongly claim to be originating from a law enforcement establishment and will certainly report having situated child pornography or other unlawful information on the tool.

    Win32/Injector.CTAU popup alert may wrongly assert to be deriving from a regulation enforcement institution as well as will certainly report having situated child pornography or various other unlawful information on the gadget. The alert will in a similar way have a need for the individual to pay the ransom.

Technical details

File Info:

crc32: 5EE03F15
md5: 92c6f241a5bf0afd3c8f570f106a891f
name: 92C6F241A5BF0AFD3C8F570F106A891F.mlw
sha1: 3ec68294787d96551c3170c6a9c1337b886b6c2c
sha256: ec25a54c1d84d0c7cd4c49a3392192fd5ad1a065b182c9a1761ce88ee1ddc2f3
sha512: f167a79f966774f4f11a6789f6a3506713e81d0f175ff7bb71bff5fc9662472fc99176c0f35126b5209a69099e6c2b049991b825692d9f7cd78ac1196d0fc0e0
ssdeep: 6144:Kfj1L+imRD3p8wG/ge4eox1wRsiPpgcZObqPPJHqNFpIpevSVe3u08yhSH5zDQX:zh36ge4/wRhVkGPlqLRb+0LhSH5PQNB
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright (C) 2014
InternalName: Restroom
FileVersion: 0.131.242.164
CompanyName: Global Locate, Inc.
SpecialBuild: 0.213.228.31
LegalTrademarks: Temporaries
Comments: Resale
ProductName: Rotated Sparta
ProductVersion: 0.40.88.217
FileDescription: Refocus Retched Toileting
OriginalFilename: Staturesl.EXE

Win32/Injector.CTAU also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 0055e3991 )
Elastic malicious (high confidence)
DrWeb Trojan.AVKill.59977
Cynet Malicious (score: 100)
CAT-QuickHeal Ransom.Teslacrypt.OL4
McAfee Ransomware-FEB!92C6F241A5BF
Cylance Unsafe
Zillya Trojan.Bitman.Win32.1071
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Ransom:Win32/Bitman.1d3ec9c4
K7GW Trojan ( 0055e3991 )
Cybereason malicious.1a5bf0
Baidu Win32.Trojan.Filecoder.k
ESET-NOD32 a variant of Win32/Injector.CTAU
APEX Malicious
Avast Win32:GenMalicious-NNI [Trj]
Kaspersky Trojan-Ransom.Win32.Bitman.jzf
BitDefender Trojan.Ransom.AQM
NANO-Antivirus Trojan.Win32.AVKill.eamngp
ViRobot Trojan.Win32.R.Agent.389120.BV
MicroWorld-eScan Trojan.Ransom.AQM
Tencent Malware.Win32.Gencirc.10c1b57d
Ad-Aware Trojan.Ransom.AQM
Sophos ML/PE-A + Mal/Ransom-EK
Comodo TrojWare.Win32.Ransom.TeslaCrypt.AS@6avt1u
BitDefenderTheta Gen:NN.ZexaF.34628.xq0@ammKIGcb
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_CRYPTESLA.SMJ7
McAfee-GW-Edition BehavesLike.Win32.Ransomware.fm
FireEye Generic.mg.92c6f241a5bf0afd
Emsisoft Trojan.Ransom.AQM (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Bitman.if
Webroot Ransom.Telsacrypt.Gen
Avira HEUR/AGEN.1111324
eGambit Unsafe.AI_Score_100%
Microsoft Ransom:Win32/Tescrypt
AegisLab Trojan.Win32.Bitman.tpWE
GData Trojan.Ransom.AQM
AhnLab-V3 Trojan/Win32.Teslacrypt.R174965
Acronis suspicious
VBA32 Hoax.Bitman
MAX malware (ai score=100)
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_CRYPTESLA.SMJ7
Rising Trojan.Ransom-Tesla!1.A322 (CLOUD)
Yandex Trojan.Bitman!GONs32cGJn0
Ikarus Trojan.Win32.Injector
Fortinet W32/Kryptik.EOVH!tr
AVG Win32:GenMalicious-NNI [Trj]
Qihoo-360 Win32/Ransom.Bitman.HwcBZRMA

How to remove Win32/Injector.CTAU 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

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.CTAU 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.CTAU 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/products/

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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