Trojan:Win32/Ymacco.AA3C

What is Trojan:Win32/Ymacco.AA3C infection?

In this post you will locate concerning the meaning of Trojan:Win32/Ymacco.AA3C and also its adverse impact on your computer. Such ransomware are a kind of malware that is elaborated by online fraudulences to demand paying the ransom money by a target.

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In the majority of the cases, Trojan:Win32/Ymacco.AA3C ransomware will certainly advise its sufferers to launch funds transfer for the objective of counteracting the amendments that the Trojan infection has actually introduced to the victim’s gadget.

Trojan:Win32/Ymacco.AA3C Summary

These adjustments 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.
  • Injection with CreateRemoteThread in a remote process;
  • 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;
  • A process created a hidden window;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • Sniffs keystrokes;
  • 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;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers situated on the sufferer’s hard drive — so the victim can no more use the information;
  • Preventing normal accessibility to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.

Trojan:Win32/Ymacco.AA3C

One of the most regular networks whereby Trojan:Win32/Ymacco.AA3C Ransomware are injected are:

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

As quickly as the Trojan is efficiently infused, it will certainly either cipher the information on the target’s PC or protect against the tool from operating in an appropriate way – while likewise positioning a ransom money note that mentions the demand for the targets to effect the repayment for the purpose of decrypting the files or bring back the documents system back to the first condition. In many instances, the ransom money note will turn up when the client restarts the COMPUTER after the system has actually already been harmed.

Trojan:Win32/Ymacco.AA3C distribution networks.

In different corners of the world, Trojan:Win32/Ymacco.AA3C expands by leaps and bounds. However, the ransom notes and methods of obtaining the ransom money quantity may vary depending upon specific local (local) setups. The ransom money notes and also methods of extorting the ransom money amount might vary depending on specific regional (regional) setups.

Ransomware injection

For example:

    Faulty informs regarding unlicensed software.

    In particular locations, the Trojans commonly wrongfully report having actually identified some unlicensed applications enabled on the sufferer’s device. The sharp after that requires the user to pay the ransom money.

    Faulty declarations about unlawful content.

    In countries where software piracy is less preferred, this technique is not as reliable for the cyber frauds. Conversely, the Trojan:Win32/Ymacco.AA3C popup alert may incorrectly declare to be stemming from a law enforcement organization as well as will certainly report having located child porn or various other unlawful data on the device.

    Trojan:Win32/Ymacco.AA3C popup alert may incorrectly assert to be acquiring from a legislation enforcement organization and also will report having located kid porn or other unlawful information on the device. The alert will similarly contain a requirement for the individual to pay the ransom.

Technical details

File Info:

crc32: CB60BBB3
md5: d5c265378bd9e1d93875df5e2c46838b
name: D5C265378BD9E1D93875DF5E2C46838B.mlw
sha1: 4a6be6cd2d9a33de6b851ac3fc856d50fbb54e4e
sha256: 3c686cb78bc738b4f108f2caed53267420d1b1b6f052ec74a02187226be5f860
sha512: e4b76b30c283b6afda5715a7747d9ae57b5de57761e0e8b0e73edd41ba7507afb8386fd1768ca4fdad0d3fc9d0dc098a6c2686e15ee1c99bfb20b9f24a44b872
ssdeep: 6144:6gOr4OW+pT+dnbC19aBgv3snHTRTVmziR/vMLZ935PFXwz6Ui:6gOr4GIbo9Cg0DI9dSz6
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

0: [No Data]

Trojan:Win32/Ymacco.AA3C also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 00578bc91 )
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader37.7397
Cynet Malicious (score: 100)
ALYac Trojan.GenericKD.36444344
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
Alibaba Ransom:Win32/generic.ali2000010
K7GW Trojan ( 00578bc91 )
Cybereason malicious.78bd9e
Cyren W32/Trojan.BHCP-4675
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/Filecoder.Buran.H
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Vega.aq
BitDefender Trojan.GenericKD.36444344
MicroWorld-eScan Trojan.GenericKD.36444344
Ad-Aware Trojan.GenericKD.36444344
Sophos ML/PE-A + Mal/EncPk-APW
F-Secure Trojan.TR/AD.ZardRansom.jwcnv
BitDefenderTheta Gen:NN.ZexaF.34608.umGfayqMQshG
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.fc
FireEye Generic.mg.d5c265378bd9e1d9
Emsisoft Trojan.GenericKD.36444344 (B)
SentinelOne Static AI – Malicious PE
Avira TR/AD.ZardRansom.jwcnv
eGambit Unsafe.AI_Score_54%
Antiy-AVL Trojan[Ransom]/Win32.Buran
Microsoft Trojan:Win32/Ymacco.AA3C
Arcabit Trojan.Generic.D22C18B8
AegisLab Trojan.Win32.Vega.j!c
ZoneAlarm Trojan-Ransom.Win32.Vega.aq
GData Win32.Trojan.Agent.2OFQG3
AhnLab-V3 Malware/Gen.Reputation.C4364815
McAfee RDN/Ransom
MAX malware (ai score=86)
Malwarebytes Ransom.FileCryptor
Panda Trj/CI.A
TrendMicro-HouseCall TROJ_GEN.R002H0CC521
Rising Ransom.Vega!8.109AB (CLOUD)
Ikarus Trojan.Crypt
Fortinet W32/Kryptik.HJEK!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Heur.Generic.HwsBsV4A

How to remove Trojan:Win32/Ymacco.AA3C ransomware?

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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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 Trojan:Win32/Ymacco.AA3C 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.AA3C 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/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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