Trojan:Win32/Ymacco.ABAF

Written by Robert Bailey

What is Trojan:Win32/Ymacco.ABAF infection?

In this short article you will certainly locate about the meaning of Trojan:Win32/Ymacco.ABAF and also its unfavorable influence on your computer. Such ransomware are a form of malware that is specified by online fraudulences to demand paying the ransom by a victim.

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In the majority of the situations, Trojan:Win32/Ymacco.ABAF ransomware will certainly instruct its sufferers to initiate funds transfer for the objective of neutralizing the modifications that the Trojan infection has actually presented to the victim’s tool.

Trojan:Win32/Ymacco.ABAF Summary

These modifications 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.
  • Expresses interest in specific running processes;
  • 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.
  • Uses Windows utilities for basic functionality;
  • A process attempted to delay the analysis task by a long amount of time.;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • 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.
  • Likely virus infection of existing system binary;
  • Attempts to identify installed AV products by installation directory;
  • Attempts to disable UAC.

    User Account Control or just UAC is a part of the Windows security system which prevents apps from making unwanted changes on PC.

    UAC includes several technologies 1:

    • File and egistry Virtualization;
    • Same-desktop Elevation;
    • Filtered Token;
    • User Interface Privilege Isolation;
    • Protected Mode Internet Explorer;
    • Installer Detection;
  • Attempts to modify Explorer settings to prevent file extensions from being displayed;
  • Attempts to modify Explorer settings to prevent hidden files from being displayed;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the files located on the victim’s hard drive — so the target can no longer make use of the information;
  • Preventing normal accessibility to the victim’s workstation;

Trojan:Win32/Ymacco.ABAF

The most common channels where Trojan:Win32/Ymacco.ABAF Ransomware 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 source that organizes a destructive software application;

As soon as the Trojan is efficiently infused, it will either cipher the information on the sufferer’s computer or prevent the device from functioning in a correct way – while likewise putting a ransom note that points out the demand for the targets to effect the repayment for the purpose of decrypting the files or bring back the data system back to the first problem. In many instances, the ransom money note will show up when the customer reboots the PC after the system has already been damaged.

Trojan:Win32/Ymacco.ABAF distribution channels.

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

Ransomware injection

For instance:

    Faulty alerts concerning unlicensed software.

    In specific locations, the Trojans usually wrongfully report having actually discovered some unlicensed applications allowed on the sufferer’s device. The alert then demands the individual to pay the ransom money.

    Faulty declarations concerning unlawful web content.

    In countries where software piracy is less prominent, this approach is not as efficient for the cyber frauds. Alternatively, the Trojan:Win32/Ymacco.ABAF popup alert may falsely declare to be originating from a police organization as well as will report having located child porn or various other prohibited data on the device.

    Trojan:Win32/Ymacco.ABAF popup alert might wrongly assert to be acquiring from a regulation enforcement institution as well as will certainly report having situated child porn or other prohibited information on the device. The alert will likewise consist of a requirement for the individual to pay the ransom money.

Technical details

File Info:

crc32: E42A48CF
md5: 17010f3492aec12a6e8379b3c31a69a4
name: 17010F3492AEC12A6E8379B3C31A69A4.mlw
sha1: 2792b883934143ba515e57f938e0b39247003c99
sha256: af703fa4548ac474eda8cec222435689fd3f8caa1cc03b9831f2583ab6618e2a
sha512: 75d47bbef666d3dae996f753c2433c7d559928982805ce9c530eaa03b63a3dcbadb9f7e160e1fa5f1693099c62ab4a92d294e4d833e3c61d1c012e90f6bfd566
ssdeep: 24576:0HHv4eHc6Y5IB1EOdhJLKK/tb9ovsnYqJ3zzt4y4D0ig/9eMV1/piHJ/yDNBVBS:0HHv4exY5OEO9KAasnYMzt+iJpE6DNB
type: MS-DOS executable, MZ for MS-DOS

Version Info:

0: [No Data]

Trojan:Win32/Ymacco.ABAF also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 004b6d5e1 )
Elastic malicious (high confidence)
DrWeb Win32.VirLock.16
Cynet Malicious (score: 100)
CAT-QuickHeal Ransom.PolyRansom.F3
ALYac Gen:Variant.Strictor.147770
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/polyransom.ali1020002
K7GW Trojan ( 004b6d5e1 )
Cybereason malicious.492aec
Cyren W32/S-024ada74!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Virlock.J
APEX Malicious
Avast Win32:Malware-gen
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Strictor.147770
NANO-Antivirus Trojan.Win32.VirLock.esxtzp
MicroWorld-eScan Gen:Variant.Strictor.147770
Tencent Virus.Win32.VirLocker.a
Ad-Aware Gen:Variant.Strictor.147770
Sophos Mal/Generic-R + W32/VirRnsm-F
Comodo Virus.Win32.VirLock.GA@7lv9go
BitDefenderTheta Gen:NN.ZexaF.34670.qnqaa0i@a!bi
VIPRE Virus.Win32.Nabucur.c (v)
McAfee-GW-Edition BehavesLike.Win32.Generic.tc
FireEye Generic.mg.17010f3492aec12a
Emsisoft Gen:Variant.Strictor.147770 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Generic.bkzpe
Avira TR/Crypt.XPACK.Gen
eGambit Unsafe.AI_Score_99%
Microsoft Trojan:Win32/Ymacco.ABAF
Arcabit Trojan.Strictor.D2413A
AegisLab Trojan.Win32.Generic.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Gen:Variant.Strictor.147770
AhnLab-V3 Trojan/Win32.Genasom.C2267544
Acronis suspicious
McAfee Artemis!17010F3492AE
MAX malware (ai score=100)
VBA32 Virus.PolyRansom.k
Malwarebytes Malware.Heuristic.1003
Panda Trj/Genetic.gen
TrendMicro-HouseCall TROJ_GEN.R002C0RDC21
Rising Ransom.Genasom!8.293 (CLOUD)
Yandex Trojan.GenAsa!bstCHARW9ZQ
Ikarus Worm.Win32.AutoRun
MaxSecure Virus.polyransom.k
Fortinet W32/Virlock.J
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Trojan.Generic.HxIBEpsA

How to remove Trojan:Win32/Ymacco.ABAF 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 GridinSoft2

There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft3.

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.ABAF 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.ABAF you can always ask me in the comments for getting help.

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References

  1. Microsoft Ignite: How to disable User Account Control (UAC) on Windows Server
  2. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  3. 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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