Win32/Kryptik.ASNC

Written by Robert Bailey

What is Win32/Kryptik.ASNC infection?

In this post you will find regarding the meaning of Win32/Kryptik.ASNC and also its negative impact on your computer. Such ransomware are a form of malware that is elaborated by online scams to require paying the ransom by a sufferer.

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In the majority of the cases, Win32/Kryptik.ASNC virus will certainly instruct its victims to initiate funds transfer for the purpose of counteracting the amendments that the Trojan infection has actually introduced to the target’s device.

Win32/Kryptik.ASNC Summary

These modifications 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);
  • Presents an Authenticode digital signature;
  • 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.
  • A process attempted to delay the analysis task.;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Executed a process and injected code into it, probably while unpacking;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Behavior consistent with a dropper attempting to download the next stage.;
  • 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;
  • Ciphering the records located on the target’s hard disk — so the target can no more utilize the information;
  • Preventing normal 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/Kryptik.ASNC

One of the most typical networks where Win32/Kryptik.ASNC Trojans are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a repercussion of individual winding up on a resource that holds a harmful software;

As soon as the Trojan is effectively infused, it will certainly either cipher the information on the sufferer’s PC or avoid the device from operating in an appropriate fashion – while also positioning a ransom money note that states the requirement for the sufferers to effect the repayment for the function of decrypting the papers or bring back the data system back to the initial condition. In the majority of circumstances, the ransom note will certainly come up when the customer reboots the PC after the system has actually currently been damaged.

Win32/Kryptik.ASNC distribution channels.

In different edges of the globe, Win32/Kryptik.ASNC expands by leaps and also bounds. Nonetheless, the ransom money notes and also methods of obtaining the ransom money quantity may vary depending upon certain local (local) setups. The ransom notes and also methods of obtaining the ransom quantity might differ depending on specific neighborhood (regional) setups.

Ransomware injection

For example:

    Faulty alerts about unlicensed software application.

    In specific locations, the Trojans commonly wrongfully report having discovered some unlicensed applications allowed on the victim’s gadget. The sharp after that demands the individual to pay the ransom money.

    Faulty declarations about illegal web content.

    In nations where software program piracy is less popular, this method is not as efficient for the cyber fraudulences. Conversely, the Win32/Kryptik.ASNC popup alert might falsely assert to be stemming from a law enforcement organization and will certainly report having located child pornography or other unlawful information on the device.

    Win32/Kryptik.ASNC popup alert might incorrectly declare to be acquiring from a legislation enforcement establishment and also will certainly report having located youngster pornography or other illegal data on the tool. The alert will likewise consist of a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: A307E0CA
md5: 3e87d4c53b834f287310797a7304897a
name: 3E87D4C53B834F287310797A7304897A.mlw
sha1: 945e62bbfb388cc8c9d48f9f2ed8b0175bf811c1
sha256: 4799031ddad1f73e2e6e94d660c625c932899be9a86b934a31f5dec1b906effc
sha512: e3a1bba4f273afb7307d6632dea8943b9952e7061be3fdfc55843a2464fd53eca407e95060d8958ee8985474676f3379d2bb83cc34b2246a2ac9a60f7001852e
ssdeep: 768:LGxYYYCiQzqHC+oblMytpaOQj4chpdsO5/CIaylInsu:LGHPzqNWl73aOQj4Updx5/9ayansu
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: xa9 Microsoft Corporation. All rights reserved.
InternalName: PERFMON.EXE
FileVersion: 5.1.2600.5512 (xpsp.080413-2105)
CompanyName: Microsoft Corporation
ProductName: Microsoftxae Windowsxae Operating System
ProductVersion: 5.1.2600.5512
FileDescription: Performance Monitor Command Line Shell
OriginalFilename: PERFMON.EXE
Translation: 0x0409 0x04b0

Win32/Kryptik.ASNC also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Trojan.Winlock.8040
ALYac Gen:Variant.Symmi.10910
Cylance Unsafe
Zillya Trojan.Blocker.Win32.3890
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (D)
Alibaba Ransom:Win32/Tobfy.d969dcf5
K7GW Trojan ( 0040f26d1 )
K7AntiVirus Trojan ( 0040f26d1 )
Cyren W32/S-bda99710!Eldorado
Symantec Packed.Generic.399
ESET-NOD32 a variant of Win32/Kryptik.ASNC
APEX Malicious
Avast Win32:Crypt-OUF [Trj]
Cynet Malicious (score: 100)
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Symmi.10910
NANO-Antivirus Trojan.Win32.Drop.ccqtxj
MicroWorld-eScan Gen:Variant.Symmi.10910
Tencent Win32.Trojan.Falsesign.Lnet
Ad-Aware Gen:Variant.Symmi.10910
Sophos ML/PE-A + Troj/Zbot-DUZ
Comodo Malware@#cmbvtngeql0
BitDefenderTheta Gen:NN.ZexaF.34628.fC1@aaCOosfi
VIPRE Virtool.Win32.Obfuscator.as!c (v)
TrendMicro TSPY_ZBOT.SMAM
FireEye Generic.mg.3e87d4c53b834f28
Emsisoft Gen:Variant.Symmi.10910 (B)
Jiangmin Trojan.Generic.dvmnk
Webroot W32.Rogue.Gen
Avira TR/Dropper.Gen
eGambit Generic.Malware
Kingsoft Win32.Heur.KVMH019.a.(kcloud)
Microsoft Ransom:Win32/Tobfy.N
AegisLab Trojan.Win32.Generic.4!c
GData Gen:Variant.Symmi.10910
TACHYON Trojan/W32.Blocker.83960
AhnLab-V3 Trojan/Win32.Blocker.R50721
McAfee PWS-Zbot.gen.aua
MAX malware (ai score=100)
VBA32 BScope.Trojan.MulDrop
Malwarebytes Trojan.FakeMS.ED
Panda Trj/Hexas.HEU
TrendMicro-HouseCall TSPY_ZBOT.SMAM
Rising Ransom.Tobfy!8.339 (CLOUD)
Yandex Trojan.GenAsa!vwXnHZ498kI
SentinelOne Static AI – Suspicious PE
MaxSecure Trojan.Malware.7164915.susgen
Fortinet W32/Zbot.JDKV!tr
AVG Win32:Crypt-OUF [Trj]
Qihoo-360 Win32/Ransom.Generic.HxQBEpsA

How to remove Win32/Kryptik.ASNC 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/Kryptik.ASNC 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/Kryptik.ASNC 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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