Written by Robert Bailey

What is Trojan:Win32/Ymacco.AAB9 infection?

In this post you will discover concerning the meaning of Trojan:Win32/Ymacco.AAB9 and its unfavorable impact on your computer. Such ransomware are a type of malware that is clarified by on-line fraudulences to demand paying the ransom by a target.

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Most of the situations, Trojan:Win32/Ymacco.AAB9 ransomware will instruct its targets to initiate funds transfer for the function of counteracting the changes that the Trojan infection has presented to the victim’s device.

Trojan:Win32/Ymacco.AAB9 Summary

These alterations can be as adheres to:

  • Attempts to connect to a dead IP:Port (3 unique times);
  • Possible date expiration check, exits too soon after checking local time;
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • 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.
  • Performs some HTTP requests;
  • The executable is compressed using UPX;
  • Uses Windows utilities for basic functionality;
  • Sniffs keystrokes;
  • 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;
  • Attempts to create or modify system certificates;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents situated on the sufferer’s disk drive — so the sufferer can no longer use the information;
  • 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 Ransom.Win32.Wacatac.oa


The most regular channels whereby Trojan:Win32/Ymacco.AAB9 Ransomware are infused are:

  • By ways of phishing emails;
  • As a repercussion of user winding up on a source that hosts a harmful software;

As quickly as the Trojan is effectively injected, it will certainly either cipher the information on the sufferer’s computer or stop the device from functioning in a proper manner – while likewise placing a ransom money note that states the demand for the victims to effect the payment for the purpose of decrypting the records or restoring the file system back to the preliminary problem. In most circumstances, the ransom note will certainly turn up when the customer reboots the PC after the system has actually already been damaged.

Trojan:Win32/Ymacco.AAB9 distribution networks.

In numerous corners of the globe, Trojan:Win32/Ymacco.AAB9 expands by jumps as well as bounds. Nonetheless, the ransom money notes and techniques of obtaining the ransom money quantity may vary depending upon specific local (regional) settings. The ransom money notes and tricks of extorting the ransom money quantity may vary depending on particular regional (regional) setups.

Ransomware injection

As an example:

    Faulty informs concerning unlicensed software.

    In particular areas, the Trojans usually wrongfully report having actually discovered some unlicensed applications enabled on the victim’s tool. The alert after that demands the customer to pay the ransom.

    Faulty statements regarding unlawful content.

    In countries where software application piracy is much less prominent, this method is not as efficient for the cyber frauds. Additionally, the Trojan:Win32/Ymacco.AAB9 popup alert might incorrectly declare to be deriving from a police organization and also will certainly report having situated youngster porn or various other unlawful data on the gadget.

    Trojan:Win32/Ymacco.AAB9 popup alert may wrongly claim to be deriving from a legislation enforcement institution and will report having located youngster porn or various other prohibited data on the tool. The alert will likewise consist of a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 1300CF05
md5: 76a358875f6089577a1d223712190015
name: 76A358875F6089577A1D223712190015.mlw
sha1: 0d70b30f20ecb891ee130f9f98b52804cbcb755a
sha256: b926187727e7694734415325657b2e2c4feb80a5c71cb3ca6c67970e4c586a50
sha512: b4f6cbe273f46bf318e513346ac7105bb6c72364f44c913cf911665f03f9811bc7da4b3e20d57c0ff051c676affbc4f4eacc1930bcc2ec7599b1068305b67946
ssdeep: 1536:eLdbirqaB/18lHtgsQDom/ZZPvaTfXgY1zUTyN5hoDd:eLM/18T6DphZPKXgTTYj6d
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

LegalCopyright: Copyright 1984-2008 Adobe Systems Incorporated and its licensors. All rights reserved.
CompanyName: Adobe Systems Incorporated
ProductName: Adobe Reader
FileDescription: Adobe Reader 9.0
OriginalFilename: AcroRd32.exe
Translation: 0x0409 0x04e4

Trojan:Win32/Ymacco.AAB9 also known as:

GridinSoft Trojan.Ransom.Gen
MicroWorld-eScan Gen:Variant.Graftor.890643
ALYac Gen:Variant.Bulz.288060
Cylance Unsafe
AegisLab Trojan.Win32.Generic.lzIt
Sangfor Malware
K7AntiVirus Password-Stealer ( 00508f801 )
BitDefender Gen:Variant.Graftor.890643
K7GW Password-Stealer ( 00508f801 )
Cybereason malicious.75f608
BitDefenderTheta AI:Packer.B36A9E8D21
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/PSW.Delf.OQJ
APEX Malicious
ClamAV Win.Trojan.Ag-1
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba TrojanPSW:Win32/Generic.63fa15e5
ViRobot Trojan.Win32.Z.Bulz.345255
Rising Stealer.Delf!8.415 (TFE:5:j5DHic3C67T)
Ad-Aware Gen:Variant.Graftor.890643
Sophos Mal/Generic-S
Comodo Malware@#26hbnezbl7off
F-Secure Trojan.TR/PSW.Agent.llomh
Emsisoft Gen:Variant.Graftor.890643 (B)
Ikarus Trojan-PWS.Agent
Avira TR/PSW.Agent.llomh
MAX malware (ai score=81)
Microsoft Trojan:Win32/Ymacco.AAB9
Gridinsoft Ransom.Win32.Wacatac.oa
Arcabit Trojan.Graftor.DD9713
AhnLab-V3 Trojan/Win32.Banload.C2009700
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Gen:Variant.Graftor.890643
Cynet Malicious (score: 90)
McAfee Artemis!76A358875F60
VBA32 BScope.Trojan.Dynamer
Malwarebytes Spyware.PasswordStealer
Panda Trj/GdSda.A
Zoner Trojan.Win32.100454
TrendMicro-HouseCall TROJ_GEN.R002H09A621
Tencent Win32.Trojan.Generic.Airz
Yandex Trojan.GenAsa!xOqX9vfyego
eGambit Unsafe.AI_Score_98%
Fortinet W32/Generic.OQJ!tr
AVG Win32:Trojan-gen
Avast Win32:Trojan-gen
CrowdStrike win/malicious_confidence_70% (D)

How to remove Trojan:Win32/Ymacco.AAB9 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

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.

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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.AAB9 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 Trojan:Win32/Ymacco.AAB9 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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