Win32:TeslaCrypt-B [Trj]

Written by Robert Bailey

What is Win32:TeslaCrypt-B [Trj] infection?

In this article you will certainly discover about the definition of Win32:TeslaCrypt-B [Trj] and its negative effect on your computer. Such ransomware are a form of malware that is elaborated by on-line fraudulences to demand paying the ransom by a target.

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In the majority of the instances, Win32:TeslaCrypt-B [Trj] virus will certainly instruct its sufferers to launch funds move for the function of neutralizing the modifications that the Trojan infection has actually presented to the target’s device.

Win32:TeslaCrypt-B [Trj] Summary

These alterations can be as follows:

  • 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.
  • 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
  • Writes a potential ransom message to disk;
  • 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 situated on the sufferer’s hard disk — so the target can no longer use the information;
  • Preventing regular access to the sufferer’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:TeslaCrypt-B [Trj]

One of the most common channels where Win32:TeslaCrypt-B [Trj] are injected are:

  • By methods of phishing emails;
  • As a consequence of user winding up on a source that organizes a malicious software;

As quickly as the Trojan is effectively infused, it will certainly either cipher the data on the sufferer’s computer or protect against the device from working in an appropriate fashion – while likewise placing a ransom money note that discusses the demand for the sufferers to impact the settlement for the objective of decrypting the files or restoring the documents system back to the preliminary problem. In the majority of circumstances, the ransom money note will certainly turn up when the customer restarts the COMPUTER after the system has already been damaged.

Win32:TeslaCrypt-B [Trj] circulation networks.

In various corners of the globe, Win32:TeslaCrypt-B [Trj] expands by jumps as well as bounds. However, the ransom notes and also methods of obtaining the ransom money amount might vary depending on specific regional (regional) settings. The ransom money notes and also tricks of obtaining the ransom quantity might differ depending on specific neighborhood (regional) settings.

Ransomware injection

As an example:

    Faulty signals about unlicensed software program.

    In certain areas, the Trojans often wrongfully report having actually spotted some unlicensed applications made it possible for on the victim’s tool. The sharp after that demands the user to pay the ransom.

    Faulty declarations concerning unlawful material.

    In nations where software piracy is less popular, this approach is not as efficient for the cyber frauds. Additionally, the Win32:TeslaCrypt-B [Trj] popup alert might falsely declare to be stemming from a police establishment and also will certainly report having located child porn or other illegal information on the gadget.

    Win32:TeslaCrypt-B [Trj] popup alert might wrongly declare to be obtaining from a law enforcement organization and will report having situated kid pornography or various other unlawful data on the tool. The alert will similarly consist of a demand for the customer to pay the ransom money.

Technical details

File Info:

crc32: C1FDC6F9
md5: 4c1626ea1439d9ad45d3efa5de84edb9
name: 4C1626EA1439D9AD45D3EFA5DE84EDB9.mlw
sha1: 2c736ddc4159ef0671508cb54d20068e4581ce56
sha256: ef6e9e5c78935d2248bea62cffff95ec3b4bef29ffb3d3d916f6aaf57bcb572f
sha512: 00875d867697fcc4fb0b6d0828d5dd14633d3d428f60d18eb536906d8699799f444d61b3b2973f9b484018cd1f23378030aa1cf787ae30eadb652d928aebb57f
ssdeep: 6144:nQ4j7Bh1yWfFTifakJuhe+2cPZ2n088f5g8P4Tb+w:t7Bh1yWfFmykJtRWD55g8QX+w
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32:TeslaCrypt-B [Trj] also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.FamVT.RazyNHmC.Trojan
K7AntiVirus Trojan ( 004d96cd1 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.3325
Cynet Malicious (score: 100)
CAT-QuickHeal Ransom.Crowti.A4
ALYac Trojan.Downloader.JSNH
Cylance Unsafe
Zillya Trojan.Kryptik.Win32.825189
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Tescrypt.4dc9655f
K7GW Trojan ( 004d96061 )
Cybereason malicious.a1439d
Baidu Win32.Trojan.Kryptik.vh
Cyren W32/Agent.XL.gen!Eldorado
ESET-NOD32 Win32/Filecoder.TeslaCrypt.I
Zoner Trojan.Win32.37131
APEX Malicious
Avast Win32:TeslaCrypt-B [Trj]
ClamAV Win.Ransomware.TeslaCrypt-9830423-0
Kaspersky Trojan.Win32.Inject.voan
BitDefender Trojan.Downloader.JSNH
NANO-Antivirus Trojan.Win32.Encoder.efgzqh
ViRobot Trojan.Win32.R.Agent.356864.M
SUPERAntiSpyware Ransom.TeslaCrypt/Variant
MicroWorld-eScan Trojan.Downloader.JSNH
Tencent Malware.Win32.Gencirc.10c49dfa
Ad-Aware Trojan.Downloader.JSNH
Sophos ML/PE-A + Troj/Ransom-BVI
Comodo TrojWare.Win32.Droma.EQJ@6b1t5k
BitDefenderTheta Gen:NN.ZexaF.34628.vuW@aCwGVKDi
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_CRYPTESLA.SMA1
McAfee-GW-Edition Generic.xt
Emsisoft Trojan.Downloader.JSNH (B)
SentinelOne Static AI – Suspicious PE
Webroot W32.Trojan.Gen
Avira TR/Crypt.XPACK.342085
eGambit Unsafe.AI_Score_99%
Kingsoft Win32.TrojDownloader.JSNH.v.(kcloud)
Microsoft Ransom:Win32/Tescrypt
Arcabit Trojan.Downloader.JSNH
AegisLab Trojan.Win32.Inject.4!c
GData Win32.Application.Agent.UT3X47
TACHYON Trojan/W32.TeslaCrypt.356864
AhnLab-V3 Trojan/Win32.NgrBot.C1313253
McAfee Generic.xt
MAX malware (ai score=100)
VBA32 Trojan.Inject
Malwarebytes Trojan.Zbot
Panda Trj/WLT.B
TrendMicro-HouseCall Ransom_CRYPTESLA.SMA1
Rising Trojan.Spy.Win32.Tescrypt.z (CLOUD)
Ikarus Trojan.Win32.Filecoder
Fortinet W32/Strap.S!tr
AVG Win32:TeslaCrypt-B [Trj]
Qihoo-360 Win32/Ransom.Tescrypt.HwoCEpsA

How to remove Win32:TeslaCrypt-B [Trj] 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.

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 Win32:TeslaCrypt-B [Trj] 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 Win32:TeslaCrypt-B [Trj] you can always ask me in the comments for getting help.

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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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