Written by Robert Bailey

What is Trojan.IStartSurf infection?

In this article you will find about the definition of Trojan.IStartSurf as well as its unfavorable effect on your computer system. Such ransomware are a type of malware that is specified by on-line frauds to require paying the ransom by a sufferer.

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In the majority of the instances, Trojan.IStartSurf virus will advise its targets to initiate funds move for the purpose of counteracting the amendments that the Trojan infection has actually presented to the victim’s gadget.

Trojan.IStartSurf Summary

These modifications 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.
  • Injection (inter-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.
  • Expresses interest in specific running processes;
  • 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.
  • Unconventionial language used in binary resources: Chinese (Simplified);
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • The executable is compressed using UPX;
  • Uses Windows utilities for basic functionality;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • Network activity detected but not expressed in API logs. Microsoft built an API solution right into its Windows operating system it reveals network activity for all apps and programs that ran on the computer in the past 30-days. This malware hides network activity.
  • Detects VirtualBox through the presence of a file;
  • Detects VirtualBox through the presence of a registry key;
  • Detects VMware through the presence of a file;
  • Detects VMware through the presence of a registry key;
  • Ciphering the records located on the sufferer’s hard drive — so the sufferer can no longer make use of the information;
  • Preventing normal accessibility 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.


One of the most normal channels through which Trojan.IStartSurf Trojans are infused are:

  • By methods of phishing emails;
  • As a consequence of customer winding up on a resource that organizes a malicious software program;

As soon as the Trojan is effectively injected, it will either cipher the information on the target’s PC or avoid the tool from operating in a correct fashion – while also putting a ransom note that points out the demand for the targets to effect the settlement for the purpose of decrypting the files or recovering the data system back to the first condition. In many circumstances, the ransom money note will certainly come up when the customer restarts the PC after the system has actually already been damaged.

Trojan.IStartSurf circulation networks.

In numerous edges of the globe, Trojan.IStartSurf grows by jumps and bounds. Nevertheless, the ransom money notes and tricks of obtaining the ransom quantity may vary depending upon specific neighborhood (regional) settings. The ransom money notes and methods of extorting the ransom quantity might vary depending on certain regional (local) setups.

Ransomware injection

As an example:

    Faulty informs about unlicensed software program.

    In particular areas, the Trojans commonly wrongfully report having spotted some unlicensed applications enabled on the victim’s gadget. The sharp then requires the user to pay the ransom.

    Faulty statements regarding unlawful web content.

    In countries where software application piracy is less prominent, this method is not as efficient for the cyber fraudulences. Conversely, the Trojan.IStartSurf popup alert may falsely claim to be originating from a police organization as well as will certainly report having located child porn or other illegal data on the gadget.

    Trojan.IStartSurf popup alert might wrongly assert to be deriving from a legislation enforcement establishment and also will certainly report having located youngster pornography or various other illegal information on the tool. The alert will likewise contain a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 094E13DC
md5: 65a4fbb76160d2a355bf261520d8da8c
name: tdcapture_1164.exe
sha1: 55c36ace28fc869535069161b9b302c1a51b2c72
sha256: 32032b031081157ac4f73f96706bbe6b40ccc027f14dd3424b93950fb63f41ac
sha512: 2964f731b35569aba4acc758c64355b62711ce860894686b294631e7489223a8bbdd9316e8a66a6a8ae6139f6fbb6a9cc1d34a2ebae68e45dea13a003294fcec
ssdeep: 49152:L692CWJfaJAwH2V+fXLRE4xPEUlP/J6bi4Sqd:a2CUwHz5pEE/J6biWd
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

0: [No Data]

Trojan.IStartSurf also known as:

GridinSoft Trojan.Ransom.Gen
CAT-QuickHeal Trojan.IgenericRI.S6086868
Qihoo-360 Win32/Virus.Adware.5f0
Malwarebytes Trojan.IStartSurf
Sangfor Malware
CrowdStrike win/malicious_confidence_100% (D)
K7GW Trojan ( 005511781 )
K7AntiVirus Trojan ( 005511781 )
F-Prot W32/S-d4f5c8bf!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Agent.AAPH
GData Win32.Trojan.Agent.AQI
Kaspersky not-a-virus:HEUR:AdWare.Win32.DealPly.gen
Avast Win64:AdwareX-gen [Adw]
Sophos Mal/Generic-S
F-Secure Heuristic.HEUR/AGEN.1040616
Invincea heuristic
SentinelOne DFI – Malicious PE
Emsisoft Application.Generic (A)
APEX Malicious
Cyren W32/S-d4f5c8bf!Eldorado
Jiangmin TrojanDropper.Roxer.e
Avira HEUR/AGEN.1040616
Endgame malicious (moderate confidence)
AhnLab-V3 Adware/Win32.Agent.R327548
ZoneAlarm not-a-virus:HEUR:AdWare.Win32.DealPly.gen
Microsoft Trojan:Win32/Wacatac.D!ml
Acronis suspicious
McAfee GenericRXHL-WZ!B974D6F2BF5A
VBA32 BScope.TrojanDropper.Roxer
Cylance Unsafe
Rising Stealer.Agent!8.C2 (TFE:dGZlOgW6CczNo/cD2g)
Ikarus Trojan.Win32.Krypt
eGambit Unsafe.AI_Score_99%
Fortinet W32/GenKryptik.CMPB!tr
AVG Win64:AdwareX-gen [Adw]
Cybereason malicious.76160d
Panda Trj/Genetic.gen

How to remove Trojan.IStartSurf virus?

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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The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

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.

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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.IStartSurf 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.

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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 Trojan.IStartSurf 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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