Trojan:Win32/Ymacco.AA41

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

What is Trojan:Win32/Ymacco.AA41 infection?

In this post you will certainly discover concerning the interpretation of Trojan:Win32/Ymacco.AA41 as well as its unfavorable influence on your computer system. Such ransomware are a type of malware that is elaborated by on the internet fraudulences to demand paying the ransom by a victim.

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Most of the situations, Trojan:Win32/Ymacco.AA41 virus will certainly instruct its victims to start funds move for the function of reducing the effects of the changes that the Trojan infection has actually presented to the sufferer’s device.

Trojan:Win32/Ymacco.AA41 Summary

These alterations 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.
  • 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.
  • Detected script timer window indicative of sleep style evasion;
  • 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.

  • A process created a hidden window;
  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • A scripting utility was executed;
  • Uses Windows utilities for basic functionality;
  • Deletes its original binary from disk;
  • 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;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files located on the sufferer’s hard drive — so the target can no more make use of the data;
  • Preventing routine 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.
Similar behavior
Related domains
z.whorecord.xyzTrojan-Ransom.Win32.SageCrypt.fjo
a.tomx.xyzTrojan-Ransom.Win32.SageCrypt.fjo

Trojan:Win32/Ymacco.AA41

One of the most typical channels where Trojan:Win32/Ymacco.AA41 Ransomware 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 an effect of customer winding up on a source that hosts a harmful software program;

As quickly as the Trojan is efficiently infused, it will certainly either cipher the data on the sufferer’s PC or avoid the device from working in a proper manner – while likewise putting a ransom note that states the demand for the victims to effect the settlement for the objective of decrypting the records or bring back the data system back to the initial condition. In a lot of instances, the ransom money note will show up when the customer reboots the COMPUTER after the system has already been damaged.

Trojan:Win32/Ymacco.AA41 circulation channels.

In various edges of the world, Trojan:Win32/Ymacco.AA41 grows by leaps and bounds. Nevertheless, the ransom money notes and tricks of extorting the ransom money quantity may differ depending on specific neighborhood (local) settings. The ransom money notes as well as techniques of obtaining the ransom amount may differ depending on specific neighborhood (regional) settings.

Ransomware injection

As an example:

    Faulty signals about unlicensed software.

    In certain locations, the Trojans commonly wrongfully report having actually identified some unlicensed applications made it possible for on the victim’s tool. The sharp then demands the individual to pay the ransom.

    Faulty declarations concerning prohibited material.

    In countries where software application piracy is much less preferred, this method is not as reliable for the cyber scams. Conversely, the Trojan:Win32/Ymacco.AA41 popup alert might wrongly claim to be originating from a police organization and will certainly report having situated kid pornography or other illegal data on the gadget.

    Trojan:Win32/Ymacco.AA41 popup alert might wrongly claim to be obtaining from a law enforcement establishment and also will certainly report having located kid porn or various other illegal information on the tool. The alert will in a similar way have a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: 7ED99207
md5: b7ce67956662c89700c91291b11583e6
name: upload_file
sha1: a797541689aba3c49c467af764d75b586b8b4af5
sha256: 41ad22e98d897261ae57cd021c5dd9fbbc09f1fb39765e0d1b68a78625840555
sha512: 3a64c474f65afb8478b85ab3d9bc96e537acbfd3d16bc18cd17579929108762577f0d515a656abf227993b73462d8ce7a55a3e6271b3ecd13183cebe7d6a428a
ssdeep: 6144:I2EDYH4aaPx2v909HPNvg/7K4GHTOmQcdKsXv5o7bKSMwaM0hY:dV5l09lg/7HGqm50sXv5gKSMwaM0hY
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Ymacco.AA41 also known as:

GridinSoftTrojan.Ransom.Gen
BkavW32.AIDetectVM.malware1
CynetMalicious (score: 100)
FireEyeGeneric.mg.b7ce67956662c897
McAfeeArtemis!B7CE67956662
CylanceUnsafe
ZillyaTrojan.SageCrypt.Win32.204
AegisLabTrojan.Win32.Malicious.4!c
SangforMalware
CrowdStrikewin/malicious_confidence_100% (W)
BitDefenderTrojan.GenericKD.43557493
K7GWTrojan ( 0050b2d01 )
K7AntiVirusTrojan ( 0050b2d01 )
TrendMicroMal_MiliCry-2t
SymantecML.Attribute.HighConfidence
APEXMalicious
AvastWin32:Trojan-gen
GDataTrojan.GenericKD.43557493
KasperskyTrojan-Ransom.Win32.SageCrypt.fjo
AlibabaRansom:Win32/generic.ali2000010
MicroWorld-eScanTrojan.GenericKD.43557493
RisingStealer.Delf!8.415 (CLOUD)
Endgamemalicious (high confidence)
EmsisoftTrojan.GenericKD.43557493 (B)
F-SecureHeuristic.HEUR/AGEN.1115437
DrWebTrojan.Encoder.32240
VIPRETrojan.Win32.Generic!BT
Invinceaheuristic
Trapminemalicious.high.ml.score
SophosMal/Generic-S
IkarusTrojan.Win32.Crypt
JiangminTrojan.SageCrypt.gg
AviraHEUR/AGEN.1115437
MAXmalware (ai score=89)
Antiy-AVLTrojan[Ransom]/Win32.SageCrypt
ArcabitTrojan.Generic.D298A275
ZoneAlarmTrojan-Ransom.Win32.SageCrypt.fjo
MicrosoftTrojan:Win32/Ymacco.AA41
AhnLab-V3Trojan/Win32.Kryptik.R346410
Acronissuspicious
VBA32Hoax.SageCrypt
ALYacTrojan.GenericKD.43557493
TACHYONRansom/W32.SageCrypt.416256
Ad-AwareTrojan.GenericKD.43557493
PandaTrj/CI.A
ESET-NOD32a variant of Win32/Kryptik.GPRG
TrendMicro-HouseCallMal_MiliCry-2t
TencentMalware.Win32.Gencirc.10bbe17d
SentinelOneDFI – Suspicious PE
eGambitUnsafe.AI_Score_99%
FortinetW32/Kryptik.GPRG!tr
BitDefenderThetaGen:NN.ZexaF.34142.zOW@aKOZYNni
AVGWin32:Trojan-gen
Cybereasonmalicious.56662c
Paloaltogeneric.ml
Qihoo-360HEUR/QVM10.1.6284.Malware.Gen

How to remove Trojan:Win32/Ymacco.AA41 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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The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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 Trojan:Win32/Ymacco.AA41 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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Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Trojan:Win32/Ymacco.AA41 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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