Trojan.Agent.ESTF

What is Trojan.Agent.ESTF infection?

In this post you will discover regarding the interpretation of Trojan.Agent.ESTF and its adverse impact on your computer system. Such ransomware are a type of malware that is clarified by online frauds to require paying the ransom by a victim.

In the majority of the instances, Trojan.Agent.ESTF ransomware will certainly instruct its victims to launch funds transfer for the purpose of counteracting the modifications that the Trojan infection has presented to the sufferer’s tool.

Trojan.Agent.ESTF Summary

These adjustments 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.
• Injection (inter-process);
• Injection (Process Hollowing);
• Attempts to connect to a dead IP:Port (1 unique times);
• Presents an Authenticode digital signature;
• 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.
• Possible date expiration check, exits too soon after checking local time;
• Mimics the system’s user agent string for its own requests;
• A process attempted to delay the analysis task.;
• Repeatedly searches for a not-found process, may want to run with startbrowser=1 option;
• 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.
• Performs some HTTP requests;
• Uses Windows utilities for basic functionality;
• Executed a process and injected code into it, probably while unpacking;
• A system process is generating network traffic likely as a result of process injection;
• 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
• Checks the version of Bios, possibly for anti-virtualization;
• Checks the CPU name from registry, possibly for anti-virtualization;
• Creates a copy of itself;
• 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 documents situated on the victim’s hard drive — so the sufferer can no more use the data;
• Preventing normal accessibility 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.

Similar behavior

Related domains

Trojan.Agent.ESTF

One of the most typical networks whereby Trojan.Agent.ESTF Ransomware are injected are:

• By methods of phishing emails;
• As an effect of user winding up on a resource that hosts a destructive software;

As soon as the Trojan is effectively infused, it will either cipher the information on the target’s computer or stop the tool from working in a correct fashion – while also placing a ransom money note that states the demand for the targets to impact the repayment for the purpose of decrypting the records or recovering the file system back to the first problem. In many circumstances, the ransom note will certainly show up when the client restarts the COMPUTER after the system has currently been damaged.

Trojan.Agent.ESTF distribution channels.

In various corners of the globe, Trojan.Agent.ESTF expands by leaps and bounds. Nonetheless, the ransom notes and also methods of extorting the ransom money amount may differ depending upon certain regional (local) settings. The ransom money notes and methods of extorting the ransom money amount may vary depending on specific neighborhood (regional) setups.

As an example:

Faulty alerts regarding unlicensed software program.

In particular locations, the Trojans commonly wrongfully report having spotted some unlicensed applications enabled on the target’s tool. The alert then requires the customer to pay the ransom money.

Faulty declarations about prohibited material.

In countries where software program piracy is less preferred, this approach is not as effective for the cyber fraudulences. Alternatively, the Trojan.Agent.ESTF popup alert might falsely assert to be deriving from a law enforcement establishment as well as will report having located child pornography or various other unlawful information on the gadget.

Trojan.Agent.ESTF popup alert might wrongly declare to be acquiring from a law enforcement establishment and also will certainly report having situated youngster porn or various other prohibited data on the device. The alert will in a similar way have a requirement for the individual to pay the ransom.

Technical details

File Info:
crc32: 06F83340md5: 8c7ddf6d414294f7aa7b9c2a6a4d4e59name: 88888.pngsha1: 7536978266272786e933d1f3c5eea41a5bc78db2sha256: 34e88835254bce5c5e8db21084b512cc67c17cee3aac5e45147ab4cbc9274a3dsha512: 505e8c34526c4409b445d6d0ac69515c332de02b6accb0ecf64bf23dc1bf52ee8780074fd147ebdc95096efc99d871b77a595bf1b7777679785df010cbed1350ssdeep: 12288:/lQq2wwLHqpVxT85LfHbRhco5QFuo+NMYkfgn6ggKa:X2wwTX5Ldhf5QUo+Nbkfg93atype: PE32 executable (GUI) Intel 80386, for MS Windows
Version Info:
0: [No Data]

Trojan.Agent.ESTF also known as:

How to remove Trojan.Agent.ESTF ransomware?

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

Run the setup file.

Press “Install” button.

Once installed, Anti-Malware will automatically run.

Wait for the Anti-Malware scan to complete.

Click on “Clean Now”.

Are Your Protected?

If the guide doesn’t help you to remove Trojan.Agent.ESTF you can always ask me in the comments for getting help.