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

What is Win32/Kryptik.AAAB infection?

In this short article you will find regarding the meaning of Win32/Kryptik.AAAB and also its negative effect on your computer system. Such ransomware are a form of malware that is specified by on the internet frauds to require paying the ransom money by a victim.

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Most of the situations, Win32/Kryptik.AAAB infection will certainly instruct its sufferers to start funds transfer for the purpose of counteracting the amendments that the Trojan infection has presented to the sufferer’s device.

Win32/Kryptik.AAAB Summary

These alterations can be as adheres to:

  • 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.
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • 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.

  • 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;
  • 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
  • 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.
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records situated on the target’s hard disk drive — so the victim can no longer utilize the data;
  • Preventing regular accessibility to the target’s workstation;
Similar behavior
Related domains Ransom:Win32/PornoAsset.f66e8c5d Ransom:Win32/PornoAsset.f66e8c5d


The most common channels whereby Win32/Kryptik.AAAB Trojans are injected are:

  • By methods of phishing emails;
  • As an effect of individual winding up on a source that holds a destructive software;

As soon as the Trojan is efficiently injected, it will either cipher the information on the victim’s PC or protect against the device from working in a proper way – while also putting a ransom note that discusses the requirement for the sufferers to effect the payment for the function of decrypting the records or restoring the documents system back to the preliminary problem. In the majority of circumstances, the ransom note will certainly come up when the client restarts the PC after the system has already been harmed.

Win32/Kryptik.AAAB circulation channels.

In various corners of the globe, Win32/Kryptik.AAAB expands by leaps and also bounds. Nonetheless, the ransom notes and also methods of obtaining the ransom money quantity might vary relying on certain local (local) setups. The ransom notes as well as tricks of extorting the ransom money amount might differ depending on specific neighborhood (regional) settings.

Ransomware injection

As an example:

    Faulty informs regarding unlicensed software application.

    In certain locations, the Trojans commonly wrongfully report having actually detected some unlicensed applications made it possible for on the target’s gadget. The alert after that demands the customer to pay the ransom.

    Faulty declarations concerning unlawful content.

    In nations where software piracy is much less prominent, this technique is not as effective for the cyber frauds. Additionally, the Win32/Kryptik.AAAB popup alert might wrongly claim to be originating from a police establishment as well as will certainly report having situated kid porn or various other prohibited data on the device.

    Win32/Kryptik.AAAB popup alert may wrongly assert to be obtaining from a legislation enforcement establishment as well as will report having located child porn or various other illegal data on the device. The alert will likewise have a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 772CAD7C
md5: 1d7d9dd6e5e6444e003282d3b49f7d53
name: 1D7D9DD6E5E6444E003282D3B49F7D53.mlw
sha1: b71a9deab476393c70f2aff757b05badb04af4a4
sha256: 4ff3f5f7bf6aacab1951b03f3833c65ce83402ad50f9d30c58f17d2e3fc073cc
sha512: 830b81e38c02b9018d692987322956f4e68685531d4d680323334def2d29fd48b84cae010badac48684486444224724880eba8a8bcb2499ea1e5af898efe8883
ssdeep: 768:iw90yTKWbpx9Q6uMR4cmUIAEozpL4EGRNn+rM:iwlPp/Q6PR8Yzl0EIn+rM
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: Copyright xa9 Cakes Cite 1995-2009
InternalName: Cuff
FileVersion: 5.9
CompanyName: Doctor Laura Tidy Side
ProductName: Stomp Safes Sag Crows
ProductVersion: 5.9
FileDescription: Put Quiz Alias Chaos
OriginalFilename: Mates.exe
Translation: 0x0409 0x04b0

Win32/Kryptik.AAAB also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
DrWeb Trojan.Winlock.4142
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.Dofoil.A
ALYac Gen:Variant.Barys.665
Cylance Unsafe
Zillya Trojan.PornoAsset.Win32.634
Sangfor Suspicious.Win32.Barys.665
Alibaba Ransom:Win32/PornoAsset.f66e8c5d
Cybereason malicious.6e5e64
Cyren W32/Yakes.B.gen!Eldorado
Symantec Packed.Generic.340
ESET-NOD32 a variant of Win32/Kryptik.AAAB
APEX Malicious
Avast FileRepMalware
ClamAV Win.Trojan.Pornoasset-626
Kaspersky Trojan-Ransom.Win32.PornoAsset.azo
BitDefender Gen:Variant.Barys.665
NANO-Antivirus Trojan.Win32.Winlock.fjphk
MicroWorld-eScan Gen:Variant.Barys.665
Tencent Win32.Trojan.Pornoasset.lej
Ad-Aware Gen:Variant.Barys.665
Sophos ML/PE-A + Mal/EncPk-AAI
Comodo Suspicious@#1kh7pml9ljzp4
BitDefenderTheta Gen:NN.ZexaF.34692.bmKfaal0UUii
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition Ransom-AG
Emsisoft Gen:Variant.Barys.665 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan/PornoAsset.ty
Webroot W32.Malware.Gen
Avira TR/Crypt.ULPM.Gen
eGambit Unsafe.AI_Score_77%
Antiy-AVL Trojan/Generic.ASMalwS.752CAA
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Ransom:Win32/Trasbind.A
Arcabit Trojan.Barys.665
AegisLab Trojan.Win32.Monder.l6UV
GData Gen:Variant.Barys.665
AhnLab-V3 Trojan/Win32.Ransomlock.R11621
McAfee Artemis!1D7D9DD6E5E6
MAX malware (ai score=100)
VBA32 BScope.Trojan-Ransom.Winlock.7921
Panda Generic Malware
Rising Ransom.Trasbind!8.292E (CLOUD)
Yandex Trojan.Kryptik!I5FyHmrb/UI
Ikarus Trojan-Ransom.PornoAsset
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Yakes.B!tr
AVG FileRepMalware

How to remove Win32/Kryptik.AAAB 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/Kryptik.AAAB 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/Kryptik.AAAB you can always ask me in the comments for getting help.

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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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