Win32/Filecoder.TeslaCrypt.B

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Win32/Filecoder.TeslaCrypt.B infection?

In this article you will locate about the meaning of Win32/Filecoder.TeslaCrypt.B as well as its negative effect on your computer system. Such ransomware are a kind of malware that is clarified by online fraudulences to require paying the ransom money by a victim.

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In the majority of the situations, Win32/Filecoder.TeslaCrypt.B ransomware will advise its sufferers to initiate funds move for the objective of reducing the effects of the changes that the Trojan infection has introduced to the target’s tool.

Win32/Filecoder.TeslaCrypt.B 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.
  • 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;
  • Deletes its original binary from disk;
  • Network activity contains more than one unique useragent.;
  • 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;
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Creates a known TeslaCrypt/AlphaCrypt ransomware decryption instruction / key file.;
  • 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 papers located on the sufferer’s hard disk drive — so the target can no more utilize the data;
  • Preventing regular access 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.

Win32/Filecoder.TeslaCrypt.B

One of the most normal networks through which Win32/Filecoder.TeslaCrypt.B Ransomware Trojans are injected are:

  • By ways of phishing e-mails;
  • As a consequence of user ending up on a resource that hosts a destructive software application;

As soon as the Trojan is successfully infused, it will certainly either cipher the information on the victim’s PC or protect against the device from working in an appropriate way – while likewise putting a ransom note that mentions the need for the sufferers to effect the settlement for the purpose of decrypting the files or recovering the file system back to the preliminary condition. In most circumstances, the ransom note will certainly come up when the client restarts the COMPUTER after the system has already been damaged.

Win32/Filecoder.TeslaCrypt.B circulation channels.

In different corners of the world, Win32/Filecoder.TeslaCrypt.B grows by jumps and also bounds. Nevertheless, the ransom money notes as well as methods of extorting the ransom money quantity may differ relying on specific regional (local) settings. The ransom money notes as well as methods of obtaining the ransom money quantity might vary depending on specific regional (local) settings.

Ransomware injection

For example:

    Faulty informs about unlicensed software program.

    In specific locations, the Trojans usually wrongfully report having detected some unlicensed applications made it possible for on the victim’s gadget. The sharp then requires the customer to pay the ransom.

    Faulty statements concerning illegal web content.

    In countries where software application piracy is much less prominent, this method is not as reliable for the cyber fraudulences. Additionally, the Win32/Filecoder.TeslaCrypt.B popup alert may wrongly claim to be stemming from a police establishment as well as will report having situated kid pornography or other prohibited data on the device.

    Win32/Filecoder.TeslaCrypt.B popup alert might falsely declare to be obtaining from a legislation enforcement establishment as well as will certainly report having located youngster pornography or various other illegal data on the tool. The alert will likewise consist of a need for the individual to pay the ransom.

Technical details

File Info:

crc32: 2DCB6BB0
md5: f3bd44d06b2b8b5f6e9d6d431b50dc9c
name: F3BD44D06B2B8B5F6E9D6D431B50DC9C.mlw
sha1: 7d76fc8c006d339f4d0a5ec3850bd43a9ddb2dec
sha256: 7bab6a3bd9b84de244157db582179fff707226672464b4375cf18757e94e2bee
sha512: 49ee89a85c7ac68f11ee25906f3a122df052b0dee5ffa1644f1b7100db16a576203c905a5039a7227ae9c4cc19eba3e816abfc288844005fdebeda728208b2e2
ssdeep: 12288:/wEu4xOnqJcmmQ7veQ7Y/vEQwo/AF5mEsOJ9PJx3Vmd4:tHYnScmmKmQ78JwVF5mqBb
type: PE32 executable (GUI) Intel 80386 system file, for MS Windows

Version Info:

LegalCopyright: Copyright xa92003-2011 Photodex Corporation
CompanyName: Photodex Corporation
LegalTrademarks: Photodex Corporation
ProductName: Control Help Utility
ProductVersion: 1.2.0.7
FileDescription: Control Help Utility
Translation: 0x0409 0x04b0

Win32/Filecoder.TeslaCrypt.B also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.888
Cynet Malicious (score: 85)
CAT-QuickHeal Trojan.Generic.B4
ALYac Gen:Variant.Zusy.319394
Cylance Unsafe
Zillya Trojan.Deshacop.Win32.56
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (D)
Alibaba Ransom:Win32/Blocker.22a681bc
K7GW Trojan ( 004be4ff1 )
K7AntiVirus Trojan ( 004be4ff1 )
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/Filecoder.TeslaCrypt.B
APEX Malicious
Avast Win32:TeslaCrypt-BK [Trj]
Kaspersky Trojan-Ransom.Win32.Blocker.jiqf
BitDefender Gen:Variant.Zusy.319394
NANO-Antivirus Trojan.Win32.Deshacop.dsduoc
ViRobot Trojan.Win32.Ransom.525824
SUPERAntiSpyware Ransom.TeslaCrypt/Variant
MicroWorld-eScan Gen:Variant.Zusy.319394
Tencent Malware.Win32.Gencirc.114cb32e
Ad-Aware Gen:Variant.Zusy.319394
Sophos Mal/Generic-S
Comodo Malware@#3vzvb147ce5g8
F-Secure Trojan-Spy:W32/Ranbyus.A
BitDefenderTheta Gen:NN.ZexaF.34608.Gu0@aGDdi@pi
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Emotet.hc
FireEye Generic.mg.f3bd44d06b2b8b5f
Emsisoft Gen:Variant.Zusy.319394 (B)
SentinelOne Static AI – Malicious PE
Webroot Trojan.Dropper.Gen
Avira HEUR/AGEN.1117311
eGambit Unsafe.AI_Score_99%
Antiy-AVL Trojan/Win32.Deshacop
Microsoft Ransom:Win32/Tescrypt.A
Arcabit Trojan.Zusy.D4DFA2
AegisLab Trojan.Win32.Deshacop.4!c
ZoneAlarm Trojan-Ransom.Win32.Blocker.jiqf
GData Gen:Variant.Zusy.319394
TACHYON Trojan/W32.Ransom.525824
AhnLab-V3 Trojan/Win32.Teslacrypt.R150075
Acronis suspicious
McAfee GenericR-EIJ!F3BD44D06B2B
MAX malware (ai score=80)
VBA32 Trojan.Deshacop
Malwarebytes MachineLearning/Anomalous.97%
Panda Trj/Genetic.gen
Rising Ransom.Tescrypt!8.3AF (CLOUD)
Yandex Trojan.Deshacop!C0veP+zEITk
Ikarus Trojan.Win32.Kovter
Fortinet W32/Filecoder.EM!tr
AVG Win32:TeslaCrypt-BK [Trj]
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Tescrypt.HgIASPkA

How to remove Win32/Filecoder.TeslaCrypt.B 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.

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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 Win32/Filecoder.TeslaCrypt.B 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?

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If the guide doesn’t help you to remove Win32/Filecoder.TeslaCrypt.B 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/comparison

About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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