What is Program:Win32/Ymacco.AA77 infection?

In this post you will certainly locate about the meaning of Program:Win32/Ymacco.AA77 and also its unfavorable effect on your computer system. Such ransomware are a kind of malware that is clarified by online scams to demand paying the ransom by a victim.

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It is better to prevent, than repair and repent!

When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
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Most of the instances, Program:Win32/Ymacco.AA77 ransomware will certainly instruct its sufferers to initiate funds move for the purpose of counteracting the amendments that the Trojan infection has actually introduced to the sufferer’s device.

Program:Win32/Ymacco.AA77 Summary

These adjustments can be as complies with:

  • Injection with CreateRemoteThread in a remote process;
  • Attempts to connect to a dead IP:Port (3 unique times);
  • Presents an Authenticode digital signature;
  • 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.
  • Possible date expiration check, exits too soon after checking local time;
  • 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.
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • A scripting utility was executed;
  • Uses Windows utilities for basic functionality;
  • Code injection with CreateRemoteThread in a remote process;
  • 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
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the documents located on the victim’s hard drive — so the sufferer can no more use the information;
  • Preventing normal accessibility to the victim’s workstation;
Similar behavior
Related domains Generic.Ransom.Buhtrap.4D947393 Generic.Ransom.Buhtrap.4D947393 Generic.Ransom.Buhtrap.4D947393 Generic.Ransom.Buhtrap.4D947393 Generic.Ransom.Buhtrap.4D947393 Generic.Ransom.Buhtrap.4D947393 Generic.Ransom.Buhtrap.4D947393


One of the most common channels whereby Program:Win32/Ymacco.AA77 Ransomware Trojans are infused are:

  • By means of phishing emails;
  • As an effect of user ending up on a source that hosts a malicious software application;

As soon as the Trojan is successfully infused, it will either cipher the information on the target’s PC or stop the device from operating in a correct manner – while likewise positioning a ransom note that discusses the need for the victims to impact the payment for the function of decrypting the papers or recovering the file system back to the first problem. In many circumstances, the ransom note will show up when the client reboots the COMPUTER after the system has already been harmed.

Program:Win32/Ymacco.AA77 distribution channels.

In numerous corners of the world, Program:Win32/Ymacco.AA77 grows by jumps as well as bounds. However, the ransom money notes and methods of extorting the ransom quantity might differ depending upon particular regional (local) setups. The ransom notes as well as tricks of extorting the ransom money amount might differ depending on specific neighborhood (local) settings.

Ransomware injection

For example:

    Faulty notifies regarding unlicensed software program.

    In particular locations, the Trojans typically wrongfully report having identified some unlicensed applications allowed on the sufferer’s device. The sharp then demands the user to pay the ransom.

    Faulty statements concerning unlawful material.

    In countries where software piracy is much less popular, this technique is not as reliable for the cyber frauds. Conversely, the Program:Win32/Ymacco.AA77 popup alert might falsely declare to be stemming from a police organization as well as will report having situated kid pornography or various other illegal data on the tool.

    Program:Win32/Ymacco.AA77 popup alert might wrongly assert to be obtaining from a legislation enforcement institution and also will certainly report having situated child porn or various other unlawful data on the tool. The alert will in a similar way include a need for the individual to pay the ransom money.

Technical details

File Info:

crc32: A18D8F97
md5: 9993dc8dfabca3331e3d9b15dc10928d
name: 9993DC8DFABCA3331E3D9B15DC10928D.mlw
sha1: 8c529a8d526b50ddf5e2c66b591feb1f444acffe
sha256: 778f30d268f051802cd3b1fe3f8a4bd010f7ab3dae1dc4e6073c0b2f972effb0
sha512: 907dc2d6851d9d4e628c272108f5a12b67cd547e74db40450e8141c6ff5179c858cb7021430abd8d440c220707e8a4eecc013b18bfd9f6747d8f0d2bfc3cdf0e
ssdeep: 12288:9Y20AljdZgBPfKfY8qQxAogJfqsUsz0cX0kJ9tdr95aj:S20gPgFKA8qQxAVBbIcXj9tdZC
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Program:Win32/Ymacco.AA77 also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Riskware ( 0040eff71 )
DrWeb Trojan.Encoder.33333
MicroWorld-eScan Generic.Ransom.Buhtrap.4D947393
ALYac Trojan.Ransom.VegaLocker
Cylance Unsafe
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Generic.29a12777
K7GW Riskware ( 0040eff71 )
Cybereason malicious.dfabca
Symantec Downloader
APEX Malicious
Avast Win32:Malware-gen
Cynet Malicious (score: 100)
BitDefender Generic.Ransom.Buhtrap.4D947393
NANO-Antivirus Trojan.Win32.Vega.iexzsa
Tencent Win32.Trojan.Falsesign.Hvix
Sophos Mal/Generic-S (PUA)
TrendMicro TROJ_FRS.VSNTA721
McAfee-GW-Edition RDN/Ransom
FireEye Generic.Ransom.Buhtrap.4D947393
Emsisoft Generic.Ransom.Buhtrap.4D947393 (B)
Jiangmin Trojan.Scar.roh
Avira TR/Redcap.usjri
eGambit PE.Heur.InvalidSig
Microsoft Program:Win32/Ymacco.AA77
Arcabit Generic.Ransom.Buhtrap.4D947393
AegisLab Trojan.Win32.Vega.j!c
GData Generic.Ransom.Buhtrap.4D947393
AhnLab-V3 Malware/Win32.Generic.C4293578
McAfee RDN/Ransom
MAX malware (ai score=99)
Malwarebytes Ransom.FakeSig
TrendMicro-HouseCall TROJ_FRS.VSNTA721
Ikarus Trojan.Inject
AVG Win32:Malware-gen

How to remove Program:Win32/Ymacco.AA77 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

There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

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 Program:Win32/Ymacco.AA77 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 Program:Win32/Ymacco.AA77 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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