Win32/Remtasu.O Virus Removal

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

Spectating the Win32/Remtasu.O detection name means that your system is in big danger. This virus can correctly be named as ransomware – type of malware which ciphers your files and asks you to pay for their decryption. Stopping it requires some specific steps that must be taken as soon as possible.

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Win32/Remtasu.O detection is a malware detection you can spectate in your system. It generally appears after the provoking procedures on your computer – opening the untrustworthy email messages, clicking the advertisement in the Internet or installing the program from untrustworthy sources. From the second it appears, you have a short time to do something about it before it begins its malicious activity. And be sure – it is much better not to wait for these malicious things.

What is Win32/Remtasu.O virus?

Win32/Remtasu.O is ransomware-type malware. It looks for the documents on your computer, encrypts it, and after that asks you to pay the ransom for receiving the decryption key. Besides making your files inaccessible, this virus additionally does a lot of harm to your system. It alters the networking settings in order to prevent you from looking for the removal tutorials or downloading the antivirus. In some cases, Win32/Remtasu.O can even stop the launching of anti-malware programs.

Win32/Remtasu.O Summary

In summary, Win32/Remtasu.O malware actions in the infected PC are next:

  • CAPE extracted potentially suspicious content;
  • The binary contains an unknown PE section name indicative of packing;
  • The binary likely contains encrypted or compressed data.;
  • The executable is compressed using UPX;
  • Authenticode signature is invalid;
  • Behavioural detection: Injection (inter-process);
  • Behavioural detection: Injection with CreateRemoteThread in a remote process;
  • CAPE detected the Xtreme malware family;
  • Attempts to modify proxy settings;
  • CAPE detected injection into a browser process, likely for Man-In-Browser (MITB) infostealing;
  • Creates a copy of itself;
  • Touches a file containing cookies, possibly for information gathering;
  • Creates known XtremeRAT mutexes;
  • Yara detections observed in process dumps, payloads or dropped files;
  • Ciphering the documents kept on the target’s disk drive — so the victim cannot open these files;
  • Blocking the launching of .exe files of security tools
  • Blocking the launching of installation files of anti-virus apps

Ransomware has been a headache for the last 4 years. It is hard to realize a more harmful virus for both individual users and businesses. The algorithms used in Win32/Remtasu.O (usually, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need a lot more time than our galaxy already exists, and possibly will exist. But that malware does not do all these bad things immediately – it may take up to a few hours to cipher all of your files. Thus, seeing the Win32/Remtasu.O detection is a clear signal that you should begin the clearing procedure.

Where did I get the Win32/Remtasu.O?

Typical ways of Win32/Remtasu.O distribution are standard for all other ransomware examples. Those are one-day landing websites where users are offered to download and install the free program, so-called bait emails and hacktools. Bait emails are a relatively new tactic in malware distribution – you receive the email that simulates some standard notifications about shippings or bank service conditions changes. Within the e-mail, there is a corrupted MS Office file, or a link which opens the exploit landing site.

Malicious email spam

Malicious email message. This one tricks you to open the phishing website.

Preventing it looks quite simple, but still demands a lot of recognition. Malware can hide in different places, and it is far better to stop it even before it invades your PC than to rely upon an anti-malware program. Standard cybersecurity knowledge is just an important thing in the modern world, even if your interaction with a computer remains on YouTube videos. That may keep you a great deal of money and time which you would spend while trying to find a solution.

Win32/Remtasu.O malware technical details

File Info:

name: F4418705CEADD4DE736B.mlw
path: /opt/CAPEv2/storage/binaries/ff9159b1ada580a7286db0951a7f4af31196424a320562acd027a51b5c62af88
crc32: 4513A1A3
md5: f4418705ceadd4de736b1ec3cd306626
sha1: 396f60d2c16ff71f57ed68fc0cd18288757c4862
sha256: ff9159b1ada580a7286db0951a7f4af31196424a320562acd027a51b5c62af88
sha512: 3216f89571888fe3b2e8847f00b1f3b20c5027fbfb6e0be2815cbaec8343bea901a829d3f092f47b3966b3c1664b94c90e580b44f77712ec928daf59204e7f6b
ssdeep: 384:1+nD2eetIgFttzfA8WFRGlm/L5wp2ZDvDqVJMoz7x4JbpL1SkLLR:1Y2PtxFt9m7GSL5UVJtz7xcpL1VJ
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T19A92C00B3ACD1C11EA6349B85B80734BE709BC2563EB47AD9BB4518F7DBF4900E5543A
sha3_384: eff13df1ac0bddc41bd192cb455b2649821c25c33ffabc03ac10c9b76701865e2f84086510310152e6238362497144b7
ep_bytes: 60be0000c9008dbe0010ffff57eb0b90
timestamp: 1992-06-19 22:22:17

Version Info:

0: [No Data]

Win32/Remtasu.O also known as:

Elasticmalicious (moderate confidence)
K7AntiVirusTrojan ( 0038dcf91 )
K7GWTrojan ( 0038dcf91 )
CrowdStrikewin/malicious_confidence_100% (D)
ESET-NOD32a variant of Win32/Remtasu.O
AvastWin32:Xtrat-I [Trj]
EmsisoftGen:Variant.Ransom.Loki.9339 (B)
CynetMalicious (score: 100)
MAXmalware (ai score=100)
PandaGeneric Malware
RisingBackdoor.Xtrat!1.6A25 (CLASSIC)
SentinelOneStatic AI – Malicious PE
AVGWin32:Xtrat-I [Trj]

How to remove Win32/Remtasu.O?

Win32/Remtasu.O malware is extremely difficult to eliminate manually. It places its documents in several locations throughout the disk, and can recover itself from one of the parts. Additionally, a lot of changes in the windows registry, networking configurations and Group Policies are fairly hard to discover and return to the original. It is much better to use a specific program – exactly, an anti-malware program. GridinSoft Anti-Malware will fit the best for malware removal goals.

Remove Win32/Remtasu.O with Gridinsoft Anti-Malware

We have also been using this software on our systems ever since, and it has always been successful in detecting viruses. It has blocked the most common Trojans as shown from our tests with the software, and we assure you that it can remove Win32/Remtasu.O as well as other malware hiding on your computer.

Gridinsoft Anti-Malware - Main Screen

To use Gridinsoft for remove malicious threats, follow the steps below:

1. Begin by downloading Gridinsoft Anti-Malware, accessible via the blue button below or directly from the official website

2.Once the Gridinsoft setup file (setup-gridinsoft-fix.exe) is downloaded, execute it by clicking on the file.


3.Follow the installation setup wizard's instructions diligently.

Gridinsoft Setup Wizard

4. Access the "Scan Tab" on the application's start screen and launch a comprehensive "Full Scan" to examine your entire computer. This inclusive scan encompasses the memory, startup items, the registry, services, drivers, and all files, ensuring that it detects malware hidden in all possible locations.

Scan for Win32/Remtasu.O Trojans

Be patient, as the scan duration depends on the number of files and your computer's hardware capabilities. Use this time to relax or attend to other tasks.

5. Upon completion, Anti-Malware will present a detailed report containing all the detected malicious items and threats on your PC.

The Win32/Remtasu.O was Found

6. Select all the identified items from the report and confidently click the "Clean Now" button. This action will safely remove the malicious files from your computer, transferring them to the secure quarantine zone of the anti-malware program to prevent any further harmful actions.

The Win32/Remtasu.O has been removed

8. If prompted, restart your computer to finalize the full system scan procedure. This step is crucial to ensure thorough removal of any remaining threats. After the restart, Gridinsoft Anti-Malware will open and display a message confirming the completion of the scan.

Remember Gridinsoft offers a 6-day free trial. This means you can take advantage of the trial period at no cost to experience the full benefits of the software and prevent any future malware infections on your system. Embrace this opportunity to fortify your computer's security without any financial commitment.

Trojan Killer for “Win32/Remtasu.O” removal on locked PC

In situations where it becomes impossible to download antivirus applications directly onto the infected computer due to malware blocking access to websites, an alternative solution is to utilize the Trojan Killer application.

Trojan Killer - Main View

There is a really little number of security tools that are able to be set up on the USB drives, and antiviruses that can do so in most cases require to obtain quite an expensive license. For this instance, I can recommend you to use another solution of GridinSoft - Trojan Killer Portable. It has a 14-days cost-free trial mode that offers the entire features of the paid version. This term will definitely be 100% enough to wipe malware out.

Trojan Killer is a valuable tool in your cybersecurity arsenal, helping you to effectively remove malware from infected computers. Now, we will walk you through the process of using Trojan Killer from a USB flash drive to scan and remove malware on an infected PC. Remember, always obtain permission to scan and remove malware from a computer that you do not own.

Step 1: Download & Install Trojan Killer on a Clean Computer:

1. Go to the official GridinSoft website ( and download Trojan Killer to a computer that is not infected.

Download Trojan Killer

2. Insert a USB flash drive into this computer.

3. Install Trojan Killer to the "removable drive" following the on-screen instructions.

Install Trojan Killer to Removable Drive

4. Once the installation is complete, launch Trojan Killer.

Step 2: Update Signature Databases:

5. After launching Trojan Killer, ensure that your computer is connected to the Internet.

6. Click "Update" icon to download the latest signature databases, which will ensure the tool can detect the most recent threats.

Click Update Button

Step 3: Scan the Infected PC:

7. Safely eject the USB flash drive from the clean computer.

8. Boot the infected computer to the Safe Mode.

9. Insert the USB flash drive.

10. Run tk.exe

11. Once the program is open, click on "Full Scan" to begin the malware scanning process.

Searching Win32/Remtasu.O Virus

Step 4: Remove Found Threats:

12. After the scan is complete, Trojan Killer will display a list of detected threats.

Searching Win32/Remtasu.O Finished

13. Click on "Cure PC!" to remove the identified malware from the infected PC.

14. Follow any additional on-screen prompts to complete the removal process.

Restart needed

Step 5: Restart Your Computer:

15. Once the threats are removed, click on "Restart PC" to reboot your computer.

16. Remove the USB flash drive from the infected computer.

Congratulations on effectively removing Win32/Remtasu.O and the concealed threats from your computer! You can now have peace of mind, knowing that they won't resurface again. Thanks to Gridinsoft's capabilities and commitment to cybersecurity, your system is now protected.

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About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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