Trojan:Win32/Ymacco.AA92

Written by Robert Bailey

What is Trojan:Win32/Ymacco.AA92 infection?

In this article you will certainly discover about the interpretation of Trojan:Win32/Ymacco.AA92 and also its unfavorable influence on your computer. Such ransomware are a type of malware that is clarified by online scams to demand paying the ransom by a sufferer.

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In the majority of the instances, Trojan:Win32/Ymacco.AA92 virus will certainly advise its targets to start funds move for the objective of counteracting the amendments that the Trojan infection has introduced to the target’s gadget.

Trojan:Win32/Ymacco.AA92 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.
  • 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.
  • 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • A scripting utility was executed;
  • Uses Windows utilities for basic functionality;
  • Deletes its original binary from disk;
  • 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.
  • Creates a copy of itself;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • 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 disk drive — so the victim can no more use the information;
  • Preventing routine access to the sufferer’s workstation;

Trojan:Win32/Ymacco.AA92

One of the most normal channels through which Trojan:Win32/Ymacco.AA92 Ransomware Trojans are infused are:

  • By means of phishing e-mails;
  • As a consequence of customer ending up on a resource that hosts a malicious software;

As quickly as the Trojan is successfully injected, it will certainly either cipher the data on the victim’s PC or protect against the gadget from functioning in a correct way – while also placing a ransom money note that mentions the requirement for the targets to impact the settlement for the objective of decrypting the files or bring back the data system back to the preliminary condition. In the majority of instances, the ransom note will certainly show up when the client restarts the PC after the system has already been damaged.

Trojan:Win32/Ymacco.AA92 distribution channels.

In various edges of the globe, Trojan:Win32/Ymacco.AA92 expands by leaps and also bounds. Nonetheless, the ransom notes as well as methods of extorting the ransom money quantity might vary depending upon particular regional (regional) setups. The ransom notes as well as tricks of extorting the ransom amount might differ depending on particular local (local) setups.

Ransomware injection

For instance:

    Faulty signals concerning unlicensed software program.

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

    Faulty declarations about unlawful content.

    In countries where software program piracy is less prominent, this technique is not as efficient for the cyber fraudulences. Alternatively, the Trojan:Win32/Ymacco.AA92 popup alert might incorrectly declare to be stemming from a police institution and will certainly report having located youngster pornography or various other illegal data on the device.

    Trojan:Win32/Ymacco.AA92 popup alert may falsely claim to be acquiring from a regulation enforcement organization as well as will report having situated child pornography or other illegal data on the device. The alert will in a similar way contain a need for the user to pay the ransom money.

Technical details

File Info:

crc32: B4D53FFE
md5: 9b163a5ca8bdb527de702718ce487383
name: upload_file
sha1: 8830a08089cec18587c202e3adfc25940a40eace
sha256: 929dea381136f491a6b9e291182835ab8d9b190614fed258d744cac0939aada4
sha512: 8fff3d22c83290dd4dd7b9015ea319a498797c2e4ae9fe1acbf1481706d898541068c3994b799d8b83f0ebe4edac904ca7e684515fd3cf20995c52ad09aa4b46
ssdeep: 6144:b2EDYH4aaPx2v909HPNvg/7K4GHTOmVcdKsXv5o7bKSMwaM0hY:CV5l09lg/7HGqmm0sXv5gKSMwaM0hY
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Ymacco.AA92 also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.GenericKD.43557469
FireEye Generic.mg.9b163a5ca8bdb527
McAfee Artemis!9B163A5CA8BD
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
K7AntiVirus Trojan ( 0050b2d01 )
BitDefender Trojan.GenericKD.43557469
K7GW Trojan ( 0050b2d01 )
Cybereason malicious.ca8bdb
Invincea heuristic
Symantec ML.Attribute.HighConfidence
APEX Malicious
Avast Win32:Trojan-gen
Kaspersky Trojan-Ransom.Win32.SageCrypt.fjk
Alibaba Ransom:Win32/generic.ali2000010
AegisLab Trojan.Win32.Malicious.4!c
Tencent Malware.Win32.Gencirc.10bbe17d
Ad-Aware Trojan.GenericKD.43557469
Sophos Mal/Generic-S
F-Secure Heuristic.HEUR/AGEN.1115437
DrWeb Trojan.Encoder.32240
Zillya Trojan.SageCrypt.Win32.204
TrendMicro Mal_MiliCry-2t
Fortinet W32/Kryptik.GPRG!tr
Emsisoft Trojan.GenericKD.43557469 (B)
SentinelOne DFI – Suspicious PE
Jiangmin Trojan.SageCrypt.gg
Avira HEUR/AGEN.1115437
MAX malware (ai score=85)
Antiy-AVL Trojan[Ransom]/Win32.SageCrypt
Arcabit Trojan.Generic.D298A25D
ZoneAlarm Trojan-Ransom.Win32.SageCrypt.fjk
Microsoft Trojan:Win32/Ymacco.AA92
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Kryptik.R346410
Acronis suspicious
BitDefenderTheta Gen:NN.ZexaF.34142.zOW@aq5KsDfi
ALYac Trojan.GenericKD.43557469
TACHYON Ransom/W32.SageCrypt.416256
VBA32 Hoax.SageCrypt
Panda Trj/CI.A
ESET-NOD32 a variant of Win32/Kryptik.GPRG
TrendMicro-HouseCall Mal_MiliCry-2t
Rising Stealer.Delf!8.415 (CLOUD)
Ikarus Trojan.Win32.Crypt
eGambit Unsafe.AI_Score_99%
GData Trojan.GenericKD.43557469
AVG Win32:Trojan-gen
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (W)
Qihoo-360 HEUR/QVM10.1.62C2.Malware.Gen

How to remove Trojan:Win32/Ymacco.AA92 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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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.

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Once installed, Anti-Malware will automatically run.

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Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for Trojan:Win32/Ymacco.AA92 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.AA92 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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