Written by Robert Bailey

What is Trojan:Win32/Ymacco.AA84 infection?

In this short article you will find about the interpretation of Trojan:Win32/Ymacco.AA84 as well as its negative effect on your computer. Such ransomware are a kind of malware that is clarified by on-line scams to demand paying the ransom money by a sufferer.

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In the majority of the cases, Trojan:Win32/Ymacco.AA84 virus will advise its victims to launch funds transfer for the function of neutralizing the modifications that the Trojan infection has actually presented to the sufferer’s gadget.

Trojan:Win32/Ymacco.AA84 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.
  • Attempts to connect to a dead IP:Port (2 unique times);
  • 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.;
  • 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;
  • Performs some HTTP requests;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses Windows utilities for basic functionality;
  • 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
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Mimics icon used for popular non-executable file format;
  • Creates a slightly modified copy of itself;
  • Ciphering the papers located on the sufferer’s disk drive — so the sufferer can no longer use the information;
  • Preventing regular 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.


The most normal channels whereby Trojan:Win32/Ymacco.AA84 are infused are:

  • By ways of phishing e-mails;
  • As a consequence of user winding up on a source that hosts a malicious software;

As soon as the Trojan is effectively infused, it will either cipher the information on the sufferer’s computer or protect against the tool from operating in a correct way – while additionally putting a ransom money note that mentions the demand for the sufferers to impact the settlement for the objective of decrypting the documents or bring back the data system back to the initial problem. In most instances, the ransom money note will turn up when the customer reboots the PC after the system has already been damaged.

Trojan:Win32/Ymacco.AA84 circulation networks.

In numerous corners of the world, Trojan:Win32/Ymacco.AA84 grows by leaps as well as bounds. Nevertheless, the ransom notes and also tricks of extorting the ransom money quantity may vary relying on certain local (regional) setups. The ransom money notes as well as techniques of extorting the ransom amount might differ depending on specific neighborhood (regional) settings.

Ransomware injection

For instance:

    Faulty notifies regarding unlicensed software application.

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

    Faulty statements about illegal material.

    In nations where software program piracy is less prominent, this technique is not as efficient for the cyber frauds. Additionally, the Trojan:Win32/Ymacco.AA84 popup alert may incorrectly declare to be deriving from a police institution and will report having located kid pornography or other unlawful data on the device.

    Trojan:Win32/Ymacco.AA84 popup alert may incorrectly assert to be deriving from a law enforcement institution and will certainly report having situated kid pornography or other illegal information on the device. The alert will in a similar way have a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 7FCA56CE
md5: 25489394a1f1c4d620185db426187edf
name: upload_file
sha1: e5b58284161d226e16221cecf230ceabd87cfca0
sha256: 8433ac6d87185d65251a833f4f37ac4095395d2751da1ff95e8d9d4e53656480
sha512: 4e032482b226b8f6924dd2716a7f8a503a9018851c2091f0402bffa52d8f1d14b3e21b0a151797b77490297b8771a40fec029c05ce158b78aae36c911f4ef4f4
ssdeep: 12288:bmARKftlbPTtfDuu755dhg0YXAqd9F56FVJS0ZGmOdnDU4EzHoH:bmAgjbPhy21hgnlNgFVAXbJDLEK
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Ymacco.AA84 also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware2
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.GenericKD.43697036
CAT-QuickHeal Ransomware.Tescrypt.WR5
McAfee RDN/Generic PWS.y
Cylance Unsafe
Sangfor Malware
K7AntiVirus Adware ( 004e9fec1 )
Alibaba Trojan:Win32/runner.ali1000123
K7GW Adware ( 004e9fec1 )
CrowdStrike win/malicious_confidence_90% (W)
Arcabit Trojan.Generic.D29AC38C
Invincea heuristic
Cyren W32/Trojan.NXTC-8191
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:MalwareX-gen [Trj]
Cynet Malicious (score: 100)
Kaspersky Trojan-PSW.MSIL.Agensla.smw
BitDefender Trojan.GenericKD.43697036
ViRobot Trojan.Win32.Z.Woreflint.516096
Rising Trojan.GenKryptik!8.AA55 (CLOUD)
Ad-Aware Trojan.GenericKD.43697036
Comodo TrojWare.Win32.Unclassified.gen@0
F-Secure Trojan.TR/Injector.jqssf
DrWeb Trojan.Inject3.51959
VIPRE Trojan.Win32.Generic!BT
Sophos Mal/Generic-S
Ikarus Trojan.SuspectCRC
Avira TR/Injector.jqssf
Antiy-AVL Trojan[PSW]/MSIL.Agensla
Microsoft Trojan:Win32/Ymacco.AA84
AegisLab Trojan.MSIL.Agensla.i!c
ZoneAlarm Trojan-PSW.MSIL.Agensla.smw
GData Trojan.GenericKD.43697036
TACHYON Trojan-PWS/W32.AgentTesla.516096
AhnLab-V3 Trojan/Win32.Kryptik.R348618
BitDefenderTheta Gen:NN.ZexaF.34196.FuW@aW96vLmi
ALYac Trojan.GenericKD.43697036
MAX malware (ai score=84)
VBA32 Trojan.Woreflint
Malwarebytes Trojan.MalPack.XOR
ESET-NOD32 a variant of Generik.HYGFMJC
TrendMicro-HouseCall TrojanSpy.MSIL.AGENSLA.USXVPHJ20
Tencent Malware.Win32.Gencirc.11acde70
SentinelOne DFI – Malicious PE
MaxSecure Trojan.Malware.105528051.susgen
Fortinet W32/GenKryptik.EQAH!tr
AVG Win32:MalwareX-gen [Trj]
Cybereason malicious.4161d2
Panda Trj/CI.A
Qihoo-360 Generic/Trojan.PSW.1dc

How to remove Trojan:Win32/Ymacco.AA84 virus?

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

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.AA84 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 Trojan:Win32/Ymacco.AA84 you can always ask me in the comments for getting help.

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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