Win32/Cridex.AA

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

What is Win32/Cridex.AA infection?

In this post you will certainly find about the meaning of Win32/Cridex.AA and its negative impact on your computer system. Such ransomware are a kind of malware that is specified by online scams to require paying the ransom by a sufferer.

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Most of the cases, Win32/Cridex.AA ransomware will advise its targets to start funds transfer for the objective of reducing the effects of the modifications that the Trojan infection has introduced to the sufferer’s gadget.

Win32/Cridex.AA Summary

These alterations 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.
  • 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files located on the victim’s hard drive — so the sufferer can no longer use the information;
  • Preventing routine accessibility to the target’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/Cridex.AA

One of the most normal networks where Win32/Cridex.AA Ransomware Trojans are infused are:

  • By ways of phishing emails;
  • As a repercussion of customer ending up on a source that holds a destructive software;

As soon as the Trojan is successfully infused, it will certainly either cipher the information on the sufferer’s PC or avoid the tool from working in a proper way – while additionally positioning a ransom money note that states the demand for the victims to effect the payment for the function of decrypting the files or bring back the documents system back to the preliminary problem. In a lot of instances, the ransom money note will certainly turn up when the client restarts the COMPUTER after the system has currently been damaged.

Win32/Cridex.AA circulation channels.

In different edges of the world, Win32/Cridex.AA grows by jumps as well as bounds. Nevertheless, the ransom notes as well as methods of extorting the ransom amount may differ relying on particular regional (regional) settings. The ransom money notes as well as tricks of obtaining the ransom quantity might vary depending on specific local (regional) settings.

Ransomware injection

For instance:

    Faulty informs regarding unlicensed software application.

    In specific locations, the Trojans often wrongfully report having actually detected some unlicensed applications allowed on the victim’s gadget. The alert after that requires the user to pay the ransom money.

    Faulty declarations about illegal web content.

    In nations where software application piracy is less preferred, this approach is not as efficient for the cyber scams. Alternatively, the Win32/Cridex.AA popup alert may falsely declare to be originating from a law enforcement organization and also will report having situated youngster porn or various other prohibited information on the device.

    Win32/Cridex.AA popup alert may incorrectly claim to be obtaining from a legislation enforcement institution and also will report having located child porn or various other illegal data on the tool. The alert will similarly include a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: F77FF662
md5: 31b9f27f2614e18397b6cebd9c01cf50
name: 31B9F27F2614E18397B6CEBD9C01CF50.mlw
sha1: 6e1c61014b55340eb20cd10b66d674166f6e63d5
sha256: 9c62466076359c500aeb1c8f0f61afb80e67695f173e0ee6227c78df16cc3c15
sha512: d5f4e81718e1d31e01e38a38c3fab0447e263e291a8fd3d8d7a1bafa5fcbc34ec397f6510b6d18009b96b99e497a9b465ab006220d9bf74c25d240d4b4e2b61a
ssdeep: 1536:CzUHtgitOssPWAGPRlZ2Za2PZe++0qFTUTI98BdWDjauRbRXc4ruHM52d0CJCyk:C0tgFEf/F44++zU7YDmu5RXEd0Ak
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Cridex.AA also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus EmailWorm ( 003247681 )
Elastic malicious (high confidence)
DrWeb Trojan.Necurs.97
Cynet Malicious (score: 100)
ALYac Gen:Variant.Razy.524966
Cylance Unsafe
Zillya Trojan.PornoAsset.Win32.4714
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (D)
K7GW EmailWorm ( 003247681 )
Cybereason malicious.f2614e
Cyren W32/Trojan.JJQE-3056
Symantec Trojan.Ransomlock!g11
ESET-NOD32 Win32/Cridex.AA
APEX Malicious
Avast Win32:Crypt-NWI [Trj]
ClamAV Win.Ransomware.Zbot-9825405-0
Kaspersky UDS:DangerousObject.Multi.Generic
BitDefender Gen:Variant.Razy.524966
NANO-Antivirus Trojan.Win32.PornoAsset.bbugky
ViRobot Trojan.Win32.A.PornoAsset.100864.D
SUPERAntiSpyware Trojan.Agent/Gen-Ransom
MicroWorld-eScan Gen:Variant.Razy.524966
Tencent Malware.Win32.Gencirc.11bc56cb
Ad-Aware Gen:Variant.Razy.524966
Sophos ML/PE-A + Mal/ZboCheMan-D
Comodo TrojWare.Win32.Kryptik.AMMJ@4r4i67
BitDefenderTheta Gen:NN.ZexaF.34688.g4W@aWZ9UHci
VIPRE LooksLike.Win32.ZboCheman.a (v)
McAfee-GW-Edition BehavesLike.Win32.ZBot.nh
FireEye Generic.mg.31b9f27f2614e183
Emsisoft Gen:Variant.Razy.524966 (B)
SentinelOne Static AI – Malicious PE
Avira TR/Crypt.XPACK.Gen
eGambit Trojan.Generic
Antiy-AVL Trojan/Generic.ASMalwS.6AA43
Kingsoft Win32.Heur.KVM007.a.(kcloud)
Microsoft Worm:Win32/Cridex.E
Arcabit Trojan.Razy.D802A6
GData Gen:Variant.Razy.524966
AhnLab-V3 Trojan/Win32.PornoAsset.R38083
Acronis suspicious
McAfee PWS-Zbot.gen.anq
MAX malware (ai score=88)
VBA32 BScope.Worm.Cridex.2112
Panda Trj/Genetic.gen
Rising Ransom.PornoAsset!8.6AA (CLOUD)
Yandex Trojan.GenAsa!oTL/99c9n9M
Ikarus Trojan-Ransom.PornoAsset
Fortinet W32/ZeroAccess.B!tr
AVG Win32:Crypt-NWI [Trj]

How to remove Win32/Cridex.AA virus?

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/Cridex.AA 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/Cridex.AA 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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