Written by Robert Bailey

What is Trojan:Win32/Stoberox.B infection?

In this short article you will find about the interpretation of Trojan:Win32/Stoberox.B and its negative effect on your computer system. Such ransomware are a type of malware that is clarified by online frauds to require paying the ransom by a target.

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In the majority of the situations, Trojan:Win32/Stoberox.B infection will instruct its targets to start funds move for the purpose of neutralizing the amendments that the Trojan infection has actually introduced to the target’s device.

Trojan:Win32/Stoberox.B Summary

These adjustments can be as complies with:

  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Injection with CreateRemoteThread in a remote process;
  • 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.
  • Starts servers listening on,;
  • 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.
  • Unconventionial language used in binary resources: Syriac;
  • 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;
  • Executed a process and injected code into it, probably while unpacking;
  • Code injection with CreateRemoteThread in a remote process;
  • Attempts to remove evidence of file being downloaded from the Internet;
  • A process attempted to delay the analysis task by a long amount of time.;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • Mimics the file times of a Windows system file;
  • 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.
  • Operates on local firewall’s policies and settings;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents found on the victim’s hard disk drive — so the target can no more make use of 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.


The most normal networks whereby Trojan:Win32/Stoberox.B Ransomware are infused are:

  • By means of phishing emails;
  • As a repercussion of customer ending up on a resource that hosts a harmful software program;

As quickly as the Trojan is effectively injected, it will either cipher the data on the target’s PC or avoid the tool from working in an appropriate manner – while additionally positioning a ransom money note that points out the requirement for the sufferers to impact the settlement for the function of decrypting the documents or restoring the data system back to the initial condition. In most circumstances, the ransom money note will certainly show up when the customer reboots the PC after the system has already been harmed.

Trojan:Win32/Stoberox.B distribution channels.

In numerous corners of the world, Trojan:Win32/Stoberox.B grows by leaps as well as bounds. However, the ransom money notes as well as techniques of obtaining the ransom money quantity might vary depending on particular neighborhood (regional) settings. The ransom money notes as well as methods of extorting the ransom quantity might vary depending on specific regional (regional) settings.

Ransomware injection

As an example:

    Faulty alerts about unlicensed software application.

    In certain locations, the Trojans frequently wrongfully report having identified some unlicensed applications allowed on the victim’s gadget. The alert after that requires the customer to pay the ransom money.

    Faulty statements regarding unlawful content.

    In nations where software program piracy is much less preferred, this approach is not as effective for the cyber frauds. Alternatively, the Trojan:Win32/Stoberox.B popup alert may falsely assert to be originating from a police institution and also will certainly report having located child pornography or various other prohibited data on the gadget.

    Trojan:Win32/Stoberox.B popup alert might falsely declare to be obtaining from a regulation enforcement institution as well as will report having located child pornography or other prohibited information on the gadget. The alert will likewise have a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: 5C1FFCE6
md5: 84d9595292523984220f61c3be37fc80
name: 84D9595292523984220F61C3BE37FC80.mlw
sha1: c5e2642b2c628940db8e80da0b50652af2982598
sha256: bf9e21764aca7786311da5655fc2b9bc4ae64cf5a4ef0a743e6b3854cbf95fc6
sha512: 44488003ec057613893efc07ccfaa09d0439de4263e737eddafc2cb1b4fc1c0d06ca66cae7a18320c55130d120b0e948a9b119bd6506492b3add8fd8d9e78ca5
ssdeep: 3072:NCBaEANS2A0YtlRmuFIAwP1pesuMN9i3:NaaEAK0YtThQ3J9
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright xa9 1997-2011 Simon Tatham.
InternalName: PuTTY
FileVersion: Release 0.62
CompanyName: Simon Tatham
ProductName: PuTTY suite
ProductVersion: Release 0.62
FileDescription: SSH, Telnet and Rlogin client
OriginalFilename: PuTTY
Translation: 0x0809 0x04b0

Trojan:Win32/Stoberox.B also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0040f8241 )
Elastic malicious (high confidence)
DrWeb BackDoor.Tishop.25
Cynet Malicious (score: 100)
ALYac Gen:Variant.Symmi.23358
Malwarebytes Trojan.FakePutt
Zillya Trojan.Injector.Win32.407141
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_80% (D)
Alibaba Ransom:Win32/Foreign.db83ed91
K7GW Trojan ( 0040f8241 )
Cybereason malicious.292523
Cyren W32/S-f21b3f83!Eldorado
ESET-NOD32 a variant of Win32/Injector.AISI
Zoner Trojan.Win32.16705
APEX Malicious
TotalDefense Win32/Matsnu.BS
Avast Win32:Cryptor
Kaspersky Trojan-Ransom.Win32.Foreign.ehjy
BitDefender Gen:Variant.Symmi.23358
NANO-Antivirus Virus.Win32.Gen-Crypt.ccnc
MicroWorld-eScan Gen:Variant.Symmi.23358
Tencent Win32.Trojan.Foreign.Ecar
Ad-Aware Gen:Variant.Symmi.23358
Sophos ML/PE-A + Mal/EncPk-AKA
Comodo TrojWare.Win32.Ransom.Foreign.EHJY@538z47
BitDefenderTheta Gen:NN.ZexaF.34628.iu0@aiGxcGiO
VIPRE Trojan.Win32.Reveton.a (v)
TrendMicro TROJ_SPNR.1BG313
Emsisoft Gen:Variant.Symmi.23358 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan/Foreign.otg
Webroot Trojan.Dropper.Gen
Avira TR/Crypt.XPACK.Gen7
eGambit Generic.Malware
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Trojan:Win32/Stoberox.B
Arcabit Trojan.Symmi.D5B3E
AegisLab Trojan.Win32.Foreign.4!c
GData Gen:Variant.Symmi.23358
AhnLab-V3 Trojan/Win32.Foreign.C169121
Acronis suspicious
McAfee PWS-Zbot-FAXY!84D959529252
MAX malware (ai score=100)
VBA32 Trojan-Ransom.Foreign
Panda Trj/Dtcontx.F
TrendMicro-HouseCall TROJ_SPNR.1BG313
Rising Ransom.Foreign!8.292 (CLOUD)
Ikarus Trojan-Ransom.Foreign
MaxSecure Trojan.Malware.5891295.susgen
Fortinet W32/Generic.AC.209C1A!tr
AVG Win32:Cryptor
Qihoo-360 Win32/Trojan.Foreign.HwoC1ucA

How to remove Trojan:Win32/Stoberox.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 Trojan:Win32/Stoberox.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:

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Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Trojan:Win32/Stoberox.B 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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