What is TrojanDownloader:Win32/Skidlo.AC infection?

In this article you will locate regarding the meaning of TrojanDownloader:Win32/Skidlo.AC and also its adverse impact on your computer system. Such ransomware are a type of malware that is specified by on the internet scams to require paying the ransom by a target.

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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 situations, TrojanDownloader:Win32/Skidlo.AC virus will advise its targets to initiate funds move for the function of neutralizing the modifications that the Trojan infection has actually introduced to the sufferer’s gadget.

TrojanDownloader:Win32/Skidlo.AC 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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.
  • 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;
  • Attempts to delete volume shadow copies;
  • Executed a process and injected code into it, probably while unpacking;
  • Attempts to stop active services;
  • Modifies boot configuration settings;
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the files situated on the sufferer’s hard disk drive — so the victim can no more use the data;
  • Preventing routine accessibility to the target’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.
Similar behavior
Related domains Ransomware.Tescrypt.WR5 Ransomware.Tescrypt.WR5 Ransomware.Tescrypt.WR5


The most typical channels where TrojanDownloader:Win32/Skidlo.AC are injected are:

  • By ways of phishing emails;
  • As a repercussion of individual ending up on a resource that holds a destructive software program;

As quickly as the Trojan is effectively injected, it will either cipher the data on the target’s PC or stop the tool from functioning in a correct way – while likewise putting a ransom money note that mentions the need for the sufferers to effect the payment for the function of decrypting the documents or recovering the documents system back to the initial problem. In many circumstances, the ransom money note will certainly come up when the client restarts the COMPUTER after the system has actually currently been damaged.

TrojanDownloader:Win32/Skidlo.AC distribution networks.

In different edges of the globe, TrojanDownloader:Win32/Skidlo.AC expands by leaps and also bounds. However, the ransom notes and also tricks of obtaining the ransom quantity might vary depending on particular local (local) settings. The ransom notes as well as tricks of extorting the ransom money amount may differ depending on certain regional (regional) setups.

Ransomware injection

For instance:

    Faulty notifies concerning unlicensed software application.

    In particular areas, the Trojans often wrongfully report having actually identified some unlicensed applications enabled on the target’s gadget. The alert after that requires the user to pay the ransom money.

    Faulty statements about prohibited web content.

    In nations where software program piracy is much less preferred, this method is not as reliable for the cyber frauds. Additionally, the TrojanDownloader:Win32/Skidlo.AC popup alert might falsely assert to be stemming from a law enforcement institution and will certainly report having located youngster pornography or other unlawful information on the device.

    TrojanDownloader:Win32/Skidlo.AC popup alert may falsely assert to be obtaining from a law enforcement institution and will certainly report having situated child pornography or other illegal data on the tool. The alert will similarly have a need for the user to pay the ransom.

Technical details

File Info:

crc32: 884E24E8
md5: c77e1e3da5123cdaf34f4109ea2098f0
name: C77E1E3DA5123CDAF34F4109EA2098F0.mlw
sha1: 8a5d28883e2f3ed295d3e4dcc6d5a9342f85e901
sha256: 14b4cbd05ded6674c042b148392c7ffbef532dcef102319000d9510c50f35236
sha512: 528aa779d23ff37f5e24d133da9e0a91de0a86e5acacdd8900bdc6d31f42fd3a0965fca0c6e2d2592fca5d316b9f5a3b13f80a1cf5c4f53aed51dc65100ec005
ssdeep: 1536:CVMUe8lG01fPqnYDIdPn2sEjmohHPDvns50WtzoZNH+dSnL:OMYoaH7DIUjjvs50YGHWY
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright 1996- 2007
FileVersion: 7,2,8,1
CompanyName: QQQ&AlinSoft
ProductName: YqcfBwgaZU
ProductVersion: 7,2,8,1
FileDescription: qcfBwgaZU
OriginalFilename: YqcfBwgaZU.exe
Translation: 0x0407 0x04e8

TrojanDownloader:Win32/Skidlo.AC also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Heur.Mint.Dreidel.fq0@xKRgtini
CAT-QuickHeal Ransomware.Tescrypt.WR5
McAfee Downloader-FBIH!C77E1E3DA512
Cylance Unsafe
VIPRE Trojan.Win32.TeslaCrypt.a (v)
AegisLab Trojan.Win32.Zlader.4!c
Sangfor Malware
CrowdStrike win/malicious_confidence_100% (W)
BitDefender Gen:Heur.Mint.Dreidel.fq0@xKRgtini
K7GW Trojan ( 0056fb141 )
K7AntiVirus Trojan ( 0056fb141 )
Invincea Mal/Generic-R + Troj/Agent-ASXC
Symantec Trojan Horse
APEX Malicious
Kaspersky Trojan.Win32.Zlader.f
Alibaba Trojan:Win32/Zlader.f9ff50f9
NANO-Antivirus Trojan.Win32.TrjGen.eewvwn
ViRobot Trojan.Win32.Z.Zlader.88064
Rising Downloader.Skidlo!8.1B69 (TFE:5:FeBiP1VcG4G)
Ad-Aware Gen:Heur.Mint.Dreidel.fq0@xKRgtini
Sophos Troj/Agent-ASXC
Comodo Malware@#2ud92yi6cweju
F-Secure Heuristic.HEUR/AGEN.1107232
DrWeb Trojan.PWS.Siggen1.54890
Zillya Trojan.Zlader.Win32.114
Emsisoft Gen:Heur.Mint.Dreidel.fq0@xKRgtini (B)
Ikarus Trojan-Downloader.Win32.Small
Jiangmin Trojan.Zlader.g
Webroot W32.Malware.Gen
Avira HEUR/AGEN.1107232
MAX malware (ai score=100)
Antiy-AVL Trojan/Win32.Zlader
Kingsoft Win32.Troj.Zlader.f.(kcloud)
Microsoft TrojanDownloader:Win32/Skidlo.AC
Arcabit Trojan.Mint.Dreidel.EDB693
SUPERAntiSpyware Ransom.Tobfy/Variant
ZoneAlarm Trojan.Win32.Zlader.f
GData Win32.Trojan-Ransom.Cryptolocker.AB
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Agent.C1510086
VBA32 Heur.Malware-Cryptor.Filecoder
ALYac Gen:Heur.Mint.Dreidel.fq0@xKRgtini
TACHYON Trojan/W32.Zlader.88064
Panda Trj/Genetic.gen
ESET-NOD32 Win32/Zlader.L
Tencent Win32.Trojan.Zlader.Syru
Yandex Trojan.Zlader!3Za+w/wv/a4
SentinelOne Static AI – Malicious PE
Fortinet W32/Injector.DDEA!tr
BitDefenderTheta Gen:NN.ZexaF.34634.fq0@aKRgtini
AVG Win32:Malware-gen
Cybereason malicious.da5123
Avast Win32:Malware-gen
Qihoo-360 HEUR/QVM10.2.8199.Malware.Gen

How to remove TrojanDownloader:Win32/Skidlo.AC 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

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.

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 TrojanDownloader:Win32/Skidlo.AC 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 TrojanDownloader:Win32/Skidlo.AC 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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