Win32/Kryptik. Gyyr

Win32/Kryptik. Gyyr

What is Win32/Kryptik.GYYR infection?

In this article you will locate about the meaning of Win32/Kryptik.GYYR and also its adverse impact on your computer system. Such ransomware are a form of malware that is elaborated by on-line fraudulences to require paying the ransom by a target.

In the majority of the cases, Win32/Kryptik.GYYR infection will instruct its targets to initiate funds move for the purpose of reducing the effects of the changes that the Trojan infection has presented to the victim’s tool.

Win32/Kryptik.GYYR 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.
  • 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;
  • Attempts to delete volume shadow copies;
  • 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 copy of itself;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the files located on the sufferer’s hard disk — so the target can no more use the information;
  • Preventing regular accessibility to the target’s workstation;
z.whorecord.xyzRansom.Crysis
a.tomx.xyzRansom.Crysis

Win32/Kryptik.GYYR

The most typical channels through which Win32/Kryptik.GYYR Ransomware are injected are:

  • By means of phishing emails;
  • As a repercussion of individual winding up on a source that hosts a malicious software application;

As quickly as the Trojan is efficiently injected, it will either cipher the data on the victim’s PC or protect against the gadget from functioning in a correct manner – while likewise placing a ransom note that discusses the demand for the victims to impact the payment for the objective of decrypting the files or bring back the data system back to the first problem. In a lot of instances, the ransom money note will certainly turn up when the customer restarts the PC after the system has actually currently been harmed.

Win32/Kryptik.GYYR circulation networks.

In various corners of the world, Win32/Kryptik.GYYR expands by leaps as well as bounds. However, the ransom notes and also methods of obtaining the ransom quantity might differ relying on particular regional (regional) setups. The ransom money notes and techniques of extorting the ransom amount may vary depending on particular local (regional) settings.

For example:

    Faulty alerts regarding unlicensed software application.

    In particular locations, the Trojans usually wrongfully report having found some unlicensed applications made it possible for on the sufferer’s gadget. The alert after that requires the individual to pay the ransom money.

    Faulty declarations about unlawful web content.

    In nations where software program piracy is much less popular, this technique is not as effective for the cyber fraudulences. Alternatively, the Win32/Kryptik.GYYR popup alert may incorrectly assert to be deriving from a police establishment and also will certainly report having located child porn or other prohibited information on the gadget.

    Win32/Kryptik.GYYR popup alert may incorrectly declare to be deriving from a legislation enforcement institution and also will certainly report having situated child pornography or other unlawful information on the gadget. The alert will likewise contain a need for the customer to pay the ransom.

Technical details

File Info:

crc32: 3CA7CECEmd5: b96d7569d68440a9d6fc2f33d8adcae7name: dmx777.exesha1: 6379a05b3645203df1ec815ee5e81e7aa98088e9sha256: 79afaaa7fa75217d4a771f7f83c5ef4ec7b3dcd9e85deb6767933524ef6b9ee7sha512: 3a69754f4884fd9a47e25f2067fcb4e2afbeeedfe3286ed6e1daeacffbf98692bf84ee6abdfcef83d5b7d7192b34c7652adfea6cd67c96c3556febf8d9d7f33essdeep: 6144:pS6MrZzRgkkZ2rorInJp3cSaAQTnoo/75NZ:pkzdk0s0nXc9AQTnoolbtype: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: Copyright (c) Omnesys Technologies, Inc.InternalName: 931667FileVersion: 3.8.7.6CompanyName: Omnesys Technologies, Inc.LegalTrademarks: Copyright (c) Omnesys Technologies, Inc.ProductName: 931667ProductVersion: 3.8.7.6FileDescription: Translation Hand Truncatin Counterrotating Clients ServicesTranslation: 0x0409 0x04b0

Win32/Kryptik.GYYR also known as:

GridinSoftTrojan.Ransom.Gen
MicroWorld-eScanTrojan.GenericKD.42074338
McAfeeRDN/Generic.tfr
ALYacTrojan.GenericKD.42074338
MalwarebytesTrojan.MalPack.UPX
VIPRETrojan.Win32.Generic!BT
AegisLabTrojan.Win32.Malicious.4!c
SangforMalware
CrowdStrikewin/malicious_confidence_90% (W)
BitDefenderTrojan.GenericKD.42074338
K7GWTrojan ( 0055c8711 )
K7AntiVirusTrojan ( 0055c8711 )
BitDefenderThetaGen:NN.ZexaF.32517.smKfaO2hz1di
SymantecRansom.Crysis
ESET-NOD32a variant of Win32/Kryptik.GYYR
APEXMalicious
GDataTrojan.GenericKD.42074338
KasperskyTrojan.Win32.DelShad.brv
Endgamemalicious (moderate confidence)
SophosMal/Generic-S
F-Secure
DrWebTrojan.Encoder.3953
Invinceaheuristic
McAfee-GW-EditionBehavesLike.Win32.Dropper.dc
Trapminemalicious.moderate.ml.score
FireEyeGeneric.mg.b96d7569d68440a9
IkarusTrojan.Win32.Crypt
CyrenW32/Trojan.YUGK-9327
JiangminTrojan.DelShad.lb
WebrootW32.Trojan.GenKD
AviraTR/AD.Crysis.gub
MAXmalware (ai score=83)
ArcabitTrojan.Generic.D28200E2
ZoneAlarmTrojan.Win32.DelShad.brv
MicrosoftTrojan:Win32/Tiggre!rfn
Ad-AwareTrojan.GenericKD.42074338
PandaTrj/CI.A
TrendMicro-HouseCallTROJ_GEN.R03BC0PL219
SentinelOneDFI – Suspicious PE
FortinetW32/Kryptik.GVSM!tr
AVGFileRepMalware
Cybereasonmalicious.b36452
Paloaltogeneric.ml
Qihoo-360Win32/Trojan.ddc
Marcus Vance
Author

Marcus Vance

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.