Written by Robert Bailey

What is Ransom:Win32/Tescrypt.O infection?

In this short article you will discover regarding the interpretation of Ransom:Win32/Tescrypt.O as well as its adverse effect on your computer. Such ransomware are a type of malware that is elaborated by on-line scams to demand paying the ransom 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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In the majority of the cases, Ransom:Win32/Tescrypt.O ransomware will certainly advise its targets to start funds move for the function of counteracting the changes that the Trojan infection has actually introduced to the target’s gadget.

Ransom:Win32/Tescrypt.O 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.
  • A process attempted to delay the analysis task.;
  • 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.
  • Uses Windows utilities for basic functionality;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • Attempts to delete volume shadow copies;
  • Exhibits behavior characteristic of Alphacrypt/Teslacrypt ransomware;
  • 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
  • Exhibits possible ransomware file modification behavior;
  • Writes a potential ransom message to disk;
  • 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;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the files located on the victim’s hard disk — so the target can no longer make use of the data;
  • Preventing regular accessibility to the target’s workstation;


The most normal channels through which Ransom:Win32/Tescrypt.O Ransomware are infused are:

  • By ways of phishing e-mails;
  • As an effect of customer ending up on a source that holds a destructive software application;

As quickly as the Trojan is efficiently infused, it will either cipher the information on the victim’s computer or protect against the tool from working in a correct manner – while additionally positioning a ransom money note that points out the need for the victims to impact the payment for the function of decrypting the records or restoring the file system back to the initial condition. In many instances, the ransom money note will show up when the client restarts the PC after the system has currently been damaged.

Ransom:Win32/Tescrypt.O circulation networks.

In different edges of the globe, Ransom:Win32/Tescrypt.O grows by jumps and bounds. Nonetheless, the ransom money notes and also tricks of extorting the ransom amount might differ depending upon specific neighborhood (regional) setups. The ransom notes and tricks of obtaining the ransom quantity might vary depending on certain neighborhood (regional) settings.

Ransomware injection

For instance:

    Faulty notifies regarding unlicensed software program.

    In specific areas, the Trojans frequently wrongfully report having identified some unlicensed applications made it possible for on the victim’s tool. The sharp after that requires the user to pay the ransom money.

    Faulty statements regarding prohibited material.

    In countries where software piracy is much less popular, this method is not as reliable for the cyber fraudulences. Additionally, the Ransom:Win32/Tescrypt.O popup alert might falsely assert to be stemming from a police establishment and will report having situated youngster pornography or other prohibited information on the gadget.

    Ransom:Win32/Tescrypt.O popup alert may falsely claim to be acquiring from a legislation enforcement organization and will report having located youngster porn or other unlawful information on the tool. The alert will in a similar way consist of a requirement for the user to pay the ransom money.

Technical details

File Info:

crc32: ED30DD13
md5: 4c797c97311407c5a96a1aa7f08e9db0
name: 4C797C97311407C5A96A1AA7F08E9DB0.mlw
sha1: 5e85936ba9886c67c340b51588569636a1ffc520
sha256: 4cc9dc0fd4c34008f5cd90a2b7ed5f3ff1b1e69ed96ba709a089cacd868bb36b
sha512: ef1ece39891066206c91ca5af5489109038865308a126a938404cc2307b2cd4fd136b1e6f26346fdec02cff0dd50b564528cf5a1a565224e49f75a39acea5b5e
ssdeep: 6144:vB8iFYYFywXwM1d0FkmFT1zTM6bDf0HFr3grgciKwQ7dkDRpMH4H6dd6:DF8w91d0FkmFTl1fCBIP6MH4HS
type: PE32 executable (console) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright xa9 2000 - 2001 S3/Diamond Multimedia
CompanyName: S3/Diamond Multimedia
Comments: Media Device Manager for Rio 800 device
ProductName: Diamond Rio800
FileDescription: MDM Device Interface for Rio 800 device.
OriginalFilename: spRio800.dll
Translation: 0x0409 0x04b0

Ransom:Win32/Tescrypt.O also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 004dfff61 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.4116
Cynet Malicious (score: 100)
CAT-QuickHeal Ransomware.Gen.WR1
ALYac Gen:Variant.Razy.29119
Cylance Unsafe
Zillya Trojan.Bitman.Win32.1852
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Ransom:Win32/Tescrypt.94763b59
K7GW Trojan ( 004dfff61 )
Cybereason malicious.731140
Cyren W32/S-06a6b9c6!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Kryptik.EQLZ
APEX Malicious
Avast Win32:TeslaCrypt-HS [Trj]
ClamAV Win.Malware.Razy-7076941-0
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Razy.29119
NANO-Antivirus Trojan.Win32.Encoder.eawpup
ViRobot Trojan.Win32.U.Agent.483328.J
MicroWorld-eScan Gen:Variant.Razy.29119
Tencent Malware.Win32.Gencirc.10bfea2b
Ad-Aware Gen:Variant.Razy.29119
Sophos ML/PE-A + Mal/EncPk-ANR
Comodo TrojWare.Win32.Crypmod.EQL@6b1qbt
BitDefenderTheta Gen:NN.ZexaF.34628.Dy0@aqIirxgi
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_CRYPTESLA.SMCP
McAfee-GW-Edition Ransom-Tescrypt!4C797C973114
FireEye Generic.mg.4c797c97311407c5
Emsisoft Gen:Variant.Razy.29119 (B)
Jiangmin Trojan.Generic.dwhgr
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1108573
eGambit Generic.Malware
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Ransom:Win32/Tescrypt.O
AegisLab Trojan.Win32.Generic.4!c
GData Gen:Variant.Razy.29119
AhnLab-V3 Trojan/Win32.Teslacrypt.R175991
McAfee Ransom-Tescrypt!4C797C973114
MAX malware (ai score=100)
VBA32 Hoax.Bitman
Malwarebytes Trojan.Pseudo
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_CRYPTESLA.SMCP
Rising Ransom.Tescrypt!8.3AF (CLOUD)
Yandex Trojan.GenAsa!+v9zDBE/Los
SentinelOne Static AI – Malicious PE
Fortinet W32/Kryptik.EQAA!tr
AVG Win32:TeslaCrypt-HS [Trj]
Qihoo-360 Win32/Ransom.Tescrypt.HxQBEpsA

How to remove Ransom:Win32/Tescrypt.O 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 Ransom:Win32/Tescrypt.O 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 Ransom:Win32/Tescrypt.O you can always ask me in the comments for getting help.

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  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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