Written by Robert Bailey

What is PWS:Win32/Zuler.B infection?

In this article you will locate concerning the interpretation of PWS:Win32/Zuler.B as well as its negative influence on your computer. Such ransomware are a form of malware that is elaborated by online frauds to demand paying the ransom by a victim.

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Most of the situations, PWS:Win32/Zuler.B virus will instruct its sufferers to start funds move for the function of counteracting the amendments that the Trojan infection has actually presented to the sufferer’s tool.

PWS:Win32/Zuler.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.
  • A process attempted to delay the analysis task.;
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • 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.

  • 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.
  • Exhibits behavior characteristic of iSpy Keylogger;
  • Harvests credentials from local FTP client softwares;
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the records situated on the target’s disk drive — so the target can no longer use the information;
  • Preventing regular 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.


One of the most regular channels where PWS:Win32/Zuler.B Ransomware are injected are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As a repercussion of customer winding up on a resource that hosts a malicious software;

As quickly as the Trojan is successfully infused, it will either cipher the information on the sufferer’s PC or stop the gadget from functioning in an appropriate way – while also positioning a ransom money note that states the demand for the victims to effect the repayment for the purpose of decrypting the records or recovering the documents system back to the initial problem. In many instances, the ransom money note will show up when the client restarts the COMPUTER after the system has actually already been damaged.

PWS:Win32/Zuler.B distribution channels.

In different corners of the globe, PWS:Win32/Zuler.B grows by leaps as well as bounds. However, the ransom money notes as well as methods of extorting the ransom money quantity might vary depending on particular local (regional) settings. The ransom money notes and also techniques of obtaining the ransom quantity might vary depending on particular regional (regional) settings.

Ransomware injection

For example:

    Faulty alerts about unlicensed software.

    In certain locations, the Trojans usually wrongfully report having detected some unlicensed applications allowed on the target’s device. The alert after that demands the individual to pay the ransom money.

    Faulty declarations concerning illegal content.

    In nations where software piracy is much less preferred, this approach is not as effective for the cyber scams. Conversely, the PWS:Win32/Zuler.B popup alert may falsely assert to be originating from a police organization and also will certainly report having located child pornography or various other prohibited data on the device.

    PWS:Win32/Zuler.B popup alert might falsely claim to be acquiring from a legislation enforcement establishment as well as will certainly report having situated kid pornography or other illegal data on the tool. The alert will likewise consist of a requirement for the customer to pay the ransom.

Technical details

File Info:

crc32: D0E6B9C0
md5: 40d8d3a543647b2d4a6a33deeba44907
name: 40D8D3A543647B2D4A6A33DEEBA44907.mlw
sha1: 41377be43390d3beaab62e184d9ee37389bd766d
sha256: 8e9397426512123d2fa5b385e5576aa64d4d637be614a2840d7575b27ecafed6
sha512: 83fa53db1c3e8b6f026b794d0761eba53d53ea886ea5db0e1a258f978e7fe91c5fb4e2d09a3c61acc7334ee4cad0607f7eba67fc19762aef012cb1bca2178d71
ssdeep: 24576:1bbuSRUys9Mj8Gouudf+aKrhWh11D2ITi8ndG0VY/G3qejfqSVvCz/3zx:FrUTaj8GoJEaKrhWh11D285VcO/fBCz9
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

PWS:Win32/Zuler.B also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Trojan.DownloaderNET.57
ClamAV Win.Trojan.Agent-928375
ALYac Dropped:Trojan.Generic.5332630
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (D)
Alibaba TrojanPSW:Win32/Blocker.f9b0df3e
K7GW Trojan ( 004b8b661 )
K7AntiVirus Trojan ( 004b8b661 )
Cyren W32/Trojan.FVRZ-7286
Symantec ML.Attribute.HighConfidence
ESET-NOD32 multiple detections
APEX Malicious
Avast Win32:Malware-gen
Cynet Malicious (score: 99)
Kaspersky Trojan-Ransom.Win32.Blocker.kpsz
BitDefender Dropped:Trojan.Generic.5332630
NANO-Antivirus Trojan.Win32.Win32.dchptk
MicroWorld-eScan Dropped:Trojan.Generic.5332630
Tencent Win32.Trojan.Generic.Pcsu
Ad-Aware Dropped:Trojan.Generic.5332630
Sophos Mal/Generic-S
Comodo Malware@#n9zquvl6hpsk
BitDefenderTheta Gen:NN.ZemsilF.34678.zm0@aqN6fOj
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_Blocker.R046C0GL320
McAfee-GW-Edition Generic Packed
Emsisoft Dropped:Trojan.Generic.5332630 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin TrojanDropper.Clons.btd
Webroot W32.Malware.Gen
Avira TR/Dropper.Gen
eGambit Unsafe.AI_Score_100%
Kingsoft Win32.Troj.Clons.(kcloud)
Microsoft PWS:Win32/Zuler.B
AegisLab Trojan.Win32.Generic.m119
GData Dropped:Trojan.Generic.5332630
McAfee Artemis!40D8D3A54364
MAX malware (ai score=100)
VBA32 Worm.MSIL.Agent
Malwarebytes MachineLearning/Anomalous.100%
Panda Trj/CI.A
TrendMicro-HouseCall Ransom_Blocker.R046C0GL320
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.DR.Agent!H+dFyuUJw1k
Ikarus Gen.Variant.MSILKrypt
Fortinet MSIL/Injector.PE!tr
AVG Win32:Malware-gen
Qihoo-360 Win32/Ransom.Blocker.HyoDhdsA

How to remove PWS:Win32/Zuler.B 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 PWS:Win32/Zuler.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?

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 PWS:Win32/Zuler.B 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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