Troj/Avaddon-A

Written by Robert Bailey

What is Troj/Avaddon-A infection?

In this short article you will certainly discover regarding the meaning of Troj/Avaddon-A as well as its adverse impact on your computer. Such ransomware are a form of malware that is elaborated by online fraudulences to require paying the ransom money by a sufferer.

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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 situations, Troj/Avaddon-A infection will advise its sufferers to start funds transfer for the objective of reducing the effects of the changes that the Trojan infection has presented to the victim’s gadget.

Troj/Avaddon-A Summary

These modifications can be as adheres to:

  • Attempts to connect to a dead IP:Port (1 unique times);
  • A process attempted to delay the analysis task.;
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
  • 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.
  • Creates an autorun.inf file;
  • Uses Windows utilities for basic functionality;
  • Attempts to delete volume shadow copies;
  • 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.
  • Clears Windows events or logs;
  • Creates a copy of itself;
  • 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 UAC prompt behavior;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the documents situated on the sufferer’s disk drive — so the victim can no longer make use of the data;
  • Preventing normal 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.

Troj/Avaddon-A

The most typical networks where Troj/Avaddon-A are injected are:

  • By means of phishing e-mails;
  • As a repercussion of user ending up on a source that holds a destructive software program;

As soon as the Trojan is efficiently infused, it will certainly either cipher the information on the sufferer’s PC or prevent the device from working in an appropriate fashion – while likewise positioning a ransom money note that mentions the requirement for the victims to effect the payment for the function of decrypting the files or bring back the file system back to the initial problem. In many instances, the ransom money note will certainly show up when the client restarts the PC after the system has already been harmed.

Troj/Avaddon-A circulation channels.

In different corners of the world, Troj/Avaddon-A expands by jumps as well as bounds. However, the ransom notes and techniques of extorting the ransom quantity might vary depending on certain regional (regional) setups. The ransom notes and methods of extorting the ransom money quantity might vary depending on particular local (regional) setups.

Ransomware injection

For example:

    Faulty notifies concerning unlicensed software program.

    In certain areas, the Trojans usually wrongfully report having discovered some unlicensed applications made it possible for on the victim’s tool. The sharp then requires the user to pay the ransom money.

    Faulty declarations concerning illegal web content.

    In countries where software program piracy is less preferred, this approach is not as effective for the cyber scams. Conversely, the Troj/Avaddon-A popup alert might incorrectly declare to be deriving from a law enforcement institution and also will report having located youngster pornography or other illegal data on the device.

    Troj/Avaddon-A popup alert may wrongly declare to be deriving from a regulation enforcement establishment as well as will certainly report having located child pornography or various other unlawful information on the tool. The alert will in a similar way include a demand for the individual to pay the ransom money.

Technical details

File Info:

crc32: 6AD508BF
md5: 0b486fe0503524cfe4726a4022fa6a68
name: 0B486FE0503524CFE4726A4022FA6A68.mlw
sha1: 297dea71d489768ce45d23b0f8a45424b469ab00
sha256: 1228d0f04f0ba82569fc1c0609f9fd6c377a91b9ea44c1e7f9f84b2b90552da2
sha512: f4273ca5cc3a9360af67f4b4ee0bf067cf218c5dc8caeafbfa1b809715effe742f2e1f54e4fe9ec8d4b8e3ae697d57f91c2b49bdf203648508d75d4a76f53619
ssdeep: 24576:TCs99+OXLpMePfI8TgmBTCDqEbOpPtpFhyxfq:5GOXLpMePfzVTCD7gPtLhSfq
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: xa9 Microsoft Corporation. All rights reserved.
InternalName: taskhost.exe
FileVersion: 10.0.17763.831 (WinBuild.160101.0800)
CompanyName: Microsoft Corporation
ProductName: Microsoftxae Windowsxae Operating System
ProductVersion: 10.0.17763.831
FileDescription: Host Process for Windows Tasks
OriginalFilename: taskhost.exe
Translation: 0x0409 0x04b0

Troj/Avaddon-A also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 00577dec1 )
Elastic malicious (high confidence)
DrWeb Trojan.MulDrop16.12853
Cynet Malicious (score: 100)
ALYac Gen:Variant.Ransom.Avaddon.3
Cylance Unsafe
Zillya Trojan.Filecoder.Win32.18512
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_70% (D)
K7GW Trojan ( 00577dec1 )
Cybereason malicious.050352
Cyren W32/Ransom.OS.gen!Eldorado
Symantec Ransom.Avaddon!g1
ESET-NOD32 a variant of Win32/Filecoder.Avaddon.C
APEX Malicious
Avast Win32:Trojan-gen
ClamAV Win.Ransomware.Avaddon-9852658-0
Kaspersky HEUR:Trojan.Win32.DelShad.gen
BitDefender Gen:Variant.Ransom.Avaddon.3
MicroWorld-eScan Gen:Variant.Ransom.Avaddon.3
Tencent Malware.Win32.Gencirc.10ce4b59
Ad-Aware Gen:Variant.Ransom.Avaddon.3
Sophos Troj/Avaddon-A
BitDefenderTheta Gen:NN.ZexaF.34690.Wu0@a8mRu3ni
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom.Win32.AVADDON.SMTHA
McAfee-GW-Edition Trojan-FTMI!0B486FE05035
FireEye Generic.mg.0b486fe0503524cf
Emsisoft Gen:Variant.Ransom.Avaddon.3 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan.DelShad.bhg
Avira HEUR/AGEN.1136765
eGambit Unsafe.AI_Score_100%
Microsoft Ransom:Win32/Avaddon.MK!MTB
Arcabit Trojan.Ransom.Avaddon.3
GData Gen:Variant.Ransom.Avaddon.3
AhnLab-V3 Malware/Win32.Ransom.C4280530
McAfee Trojan-FTMI!0B486FE05035
MAX malware (ai score=86)
VBA32 Trojan.DelShad
Malwarebytes Ransom.Avaddon
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom.Win32.AVADDON.SMTHA
Rising Ransom.Avaddon!1.C7A8 (CLASSIC)
Yandex Trojan.DelShad!9+W8qxhoK3A
Ikarus Trojan-Ransom.Avaddon
MaxSecure Trojan.Malware.74279478.susgen
Fortinet W32/Avaddon.C!tr.ransom
AVG Win32:Trojan-gen

How to remove Troj/Avaddon-A 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 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 Troj/Avaddon-A 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 Troj/Avaddon-A 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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