Ransom:Win32/Teerac!rfn

What is Ransom:Win32/Teerac!rfn infection?

In this article you will locate concerning the meaning of Ransom:Win32/Teerac!rfn and its negative effect on your computer system. Such ransomware are a kind of malware that is specified by on-line frauds to demand paying the ransom by a sufferer.

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In the majority of the situations, Ransom:Win32/Teerac!rfn infection will certainly advise its victims to initiate funds transfer for the function of reducing the effects of the amendments that the Trojan infection has actually introduced to the victim’s device.

Ransom:Win32/Teerac!rfn Summary

These alterations 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);
  • Injection (Process Hollowing);
  • 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.;
  • 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;
  • Executed a process and injected code into it, probably while unpacking;
  • Attempts to delete volume shadow copies;
  • A system process is generating network traffic likely as a result of process injection;
  • Behavior consistent with a dropper attempting to download the next stage.;
  • 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
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Attempts to modify browser security settings;
  • Creates a copy of itself;
  • Harvests credentials from local FTP client softwares;
  • Harvests information related to installed mail clients;
  • 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.
  • Uses suspicious command line tools or Windows utilities;
  • Ciphering the files located on the target’s disk drive — so the victim can no more make use of the data;
  • Preventing regular accessibility to the victim’s workstation;

Ransom:Win32/Teerac!rfn

One of the most common channels through which Ransom:Win32/Teerac!rfn Trojans are injected are:

  • By means of phishing emails;
  • As a consequence of user ending up on a source that hosts a malicious software application;

As soon as the Trojan is efficiently infused, it will either cipher the data on the victim’s PC or prevent the device from functioning in an appropriate manner – while likewise placing a ransom money note that points out the requirement for the sufferers to effect the payment for the function of decrypting the documents or recovering the data system back to the initial problem. In many instances, the ransom note will certainly turn up when the customer reboots the PC after the system has actually already been damaged.

Ransom:Win32/Teerac!rfn distribution channels.

In different edges of the world, Ransom:Win32/Teerac!rfn grows by jumps as well as bounds. However, the ransom money notes and methods of extorting the ransom money quantity may vary depending upon certain local (regional) setups. The ransom notes and methods of extorting the ransom amount may vary depending on particular neighborhood (regional) settings.

Ransomware injection

As an example:

    Faulty signals concerning unlicensed software program.

    In specific locations, the Trojans commonly wrongfully report having actually found some unlicensed applications made it possible for on the target’s device. The alert then demands the individual to pay the ransom money.

    Faulty declarations about prohibited material.

    In countries where software application piracy is less preferred, this method is not as reliable for the cyber fraudulences. Conversely, the Ransom:Win32/Teerac!rfn popup alert may incorrectly assert to be stemming from a police institution and will report having situated child porn or other unlawful data on the tool.

    Ransom:Win32/Teerac!rfn popup alert may wrongly declare to be obtaining from a regulation enforcement establishment and will certainly report having situated kid porn or other prohibited data on the device. The alert will similarly include a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 9D27BAAD
md5: c86a3887813d7c084833973c910b02a4
name: C86A3887813D7C084833973C910B02A4.mlw
sha1: 10f35960a8b8399dd03a30795976222b84505f65
sha256: a96e010f86d38528ff6039c16a36d75feef2471df9b6b3955a1f4c51d82fbf7d
sha512: 427a27cd6e08e453116243d76f7a6cab15fccfc664f72b07c5b9b33bf231b052677f6ba536381b4acd9ede4b69e1ae9b18a6f05f74ace68685b77b8a202302df
ssdeep: 6144:EAsBZ7WEysj09jdWQKDP9+roqRStG1s6ZIaw1JgpxiGCn3mFb0+EhOYh+NjwI4Vg:WWM87fSc1smEJgXUn3gXGOYhswIJ
type: PE32 executable (GUI) Intel 80386, for MS Windows, Nullsoft Installer self-extracting archive

Version Info:

0: [No Data]

Ransom:Win32/Teerac!rfn also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 0055e3ef1 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.4549
MicroWorld-eScan Trojan.GenericKD.3240422
ALYac Trojan.GenericKD.3240422
Cylance Unsafe
Zillya Trojan.Onion.Win32.1095
Sangfor Trojan.Win32.GenericKD.4
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Backdoor:Win32/Androm.6d437a3b
K7GW Trojan ( 0055e3ef1 )
Cybereason malicious.7813d7
Symantec Ransom.TorrentLocker
ESET-NOD32 Win32/Filecoder.TorrentLocker.A
APEX Malicious
Avast Win32:Malware-gen
Cynet Malicious (score: 100)
Kaspersky HEUR:Backdoor.Win32.Androm.gen
BitDefender Trojan.GenericKD.3240422
NANO-Antivirus Trojan.Win32.Encoder.ecnlxe
ViRobot Dropper.S.Agent.380007
Tencent Win32.Trojan.Filecoder.Syrq
Ad-Aware Trojan.GenericKD.3240422
Sophos Mal/Generic-R + Mal/Cerber-Z
Comodo Malware@#sdotzqvaqep8
BitDefenderTheta Gen:NN.ZedlaF.34628.du8@aCbE@Nbi
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_CRILOCK.CBQ165G
McAfee-GW-Edition BehavesLike.Win32.Dropper.fc
FireEye Generic.mg.c86a3887813d7c08
Emsisoft Trojan.GenericKD.3240422 (B)
SentinelOne Static AI – Suspicious PE
Webroot W32.Trojan.Gen
Avira TR/Dropper.Gen
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Ransom:Win32/Teerac!rfn
Arcabit Trojan.Generic.D3171E6
AegisLab Trojan.Win32.Androm.4!c
ZoneAlarm HEUR:Backdoor.Win32.Androm.gen
GData Trojan.GenericKD.3240422
AhnLab-V3 Trojan/Win32.ZBot.C1442030
McAfee Artemis!C86A3887813D
MAX malware (ai score=100)
VBA32 Trojan-Ransom.Onion
Panda Trj/CI.A
TrendMicro-HouseCall Ransom_CRILOCK.CBQ165G
Rising Trojan.Injector!8.C4 (CLOUD)
Ikarus Trojan.Win32.Injector
Fortinet W32/Malicious_Behavior.VEX
AVG Win32:Malware-gen
Qihoo-360 Win32/Backdoor.Androm.HyoDEpsA

How to remove Ransom:Win32/Teerac!rfn 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

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 Ransom:Win32/Teerac!rfn 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 Ransom:Win32/Teerac!rfn you can always ask me in the comments for getting help.

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/products/

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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