Win32/Injector.CRSF

What is Win32/Injector.CRSF infection?

In this short article you will certainly find concerning the definition of Win32/Injector.CRSF and also its adverse effect on your computer system. Such ransomware are a form of malware that is specified by online frauds to require paying the ransom by a sufferer.

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Most of the situations, Win32/Injector.CRSF ransomware will certainly instruct its sufferers to launch funds move for the purpose of counteracting the amendments that the Trojan infection has actually introduced to the target’s gadget.

Win32/Injector.CRSF 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.
  • 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.
  • Mimics the system’s user agent string for its own requests;
  • 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.

  • Unconventionial language used in binary resources: Russian;
  • 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;
  • Executed a process and injected code into it, probably while unpacking;
  • Deletes its original binary from disk;
  • Exhibits behavior characteristic of Cryptowall 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
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Ciphering the documents found on the target’s hard drive — so the target can no more use the information;
  • 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.

Win32/Injector.CRSF

The most common networks whereby Win32/Injector.CRSF Ransomware are injected are:

  • By methods of phishing emails;
  • As an effect of user ending up on a source that hosts a destructive software program;

As soon as the Trojan is effectively injected, it will certainly either cipher the information on the victim’s PC or protect against the tool from functioning in an appropriate manner – while additionally putting a ransom money note that states the need for the targets to effect the settlement for the objective of decrypting the files or restoring the file system back to the first condition. In the majority of circumstances, the ransom note will show up when the client reboots the PC after the system has actually already been harmed.

Win32/Injector.CRSF distribution networks.

In different corners of the globe, Win32/Injector.CRSF expands by leaps as well as bounds. Nonetheless, the ransom money notes as well as techniques of extorting the ransom money quantity may differ depending on particular regional (regional) settings. The ransom money notes as well as tricks of extorting the ransom money amount might vary depending on certain regional (regional) settings.

Ransomware injection

For example:

    Faulty signals regarding unlicensed software application.

    In certain locations, the Trojans often wrongfully report having actually found some unlicensed applications made it possible for on the sufferer’s gadget. The sharp then demands the user to pay the ransom money.

    Faulty statements about unlawful material.

    In countries where software application piracy is much less preferred, this approach is not as effective for the cyber scams. Conversely, the Win32/Injector.CRSF popup alert might incorrectly claim to be originating from a police organization as well as will report having situated kid porn or other unlawful information on the gadget.

    Win32/Injector.CRSF popup alert might wrongly assert to be acquiring from a regulation enforcement organization as well as will certainly report having situated child porn or various other unlawful information on the tool. The alert will in a similar way contain a demand for the user to pay the ransom.

Technical details

File Info:

crc32: B96EFD97
md5: e5a8f43b64f300bcd2acb0bf7fbf5790
name: E5A8F43B64F300BCD2ACB0BF7FBF5790.mlw
sha1: 2e2b8d2d9a1b199e5c8a62df81444d149074144c
sha256: 9218d3c399d8bed21f5926f6df24fc41a78bb4e1045661d93cca4e55d1fccf9b
sha512: 6861d3b5cf65e6eff4b9bed02384d86da1a190ce5de489bce978fa4641a5271ea1452f77bacea2d9efa34878ab907daddfbb3065c25246f785769df9b91580d7
ssdeep: 6144:fFgftpLCh1nj0JH9HbGpBEI126ZbVjVZ3bG77jg8eJ:fWftGIV9HbGpBEJ6ZbVjVkDQ
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

Translation: 0x0409 0x04b0
LegalCopyright: chart type and compare iShares Morningstar Mid-Cap Gro against other companies.
InternalName: Certyu
FileVersion: 5.02.0014
CompanyName: fLash x11amechart type and compare iShares Morningstar Mid-Cap Gro against other companies.
LegalTrademarks: chart type and compare iShares Morningstar Mid-Cap Gro against other companies.
Comments: chart type and compare iShares Morningstar Mid-Cap Gro against other companies.
ProductName: chart type and compare iShares Morningstar Mid-Cap Gro against other companies.
ProductVersion: 5.02.0014
FileDescription: chart type and compare iShares Morningstar Mid-Cap Gro against other companies.
OriginalFilename: Certyu.exe

Win32/Injector.CRSF also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0050a06e1 )
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Symmi.60764
ALYac Gen:Variant.Symmi.60764
Cylance Unsafe
Zillya Trojan.Cryptodef.Win32.2818
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Cryptodef.ef6ce52e
K7GW Trojan ( 0050a06e1 )
Cybereason malicious.b64f30
BitDefenderTheta Gen:NN.ZevbaF.34628.omNfaiiIiepk
ESET-NOD32 a variant of Win32/Injector.CRSF
APEX Malicious
Avast Win32:Malware-gen
Cynet Malicious (score: 100)
Kaspersky Trojan-Ransom.Win32.Cryptodef.adhl
BitDefender Gen:Variant.Symmi.60764
NANO-Antivirus Trojan.Win32.Cryptodef.eobyrf
Tencent Win32.Trojan.Cryptodef.Akyq
Ad-Aware Gen:Variant.Symmi.60764
Sophos ML/PE-A
DrWeb Trojan.KillProc.52277
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Autorun.dc
FireEye Generic.mg.e5a8f43b64f300bc
Emsisoft Gen:Variant.Symmi.60764 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Cryptodef.abi
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1113143
Arcabit Trojan.Symmi.DED5C
AegisLab Trojan.Win32.Cryptodef.j!c
GData Gen:Variant.Symmi.60764
McAfee Artemis!E5A8F43B64F3
MAX malware (ai score=82)
Malwarebytes Malware.Heuristic.1003
Panda Trj/CI.A
Rising Ransom.Cryptodef!8.672 (CLOUD)
Ikarus Trojan.Win32.Filecoder
Fortinet W32/Cryptodef.ADHL!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Cryptodef.HwsB8a8A

How to remove Win32/Injector.CRSF 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

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.CRSF 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:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Win32/Injector.CRSF 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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