TrojanDownloader:Win32/SmallAgent!atmn Virus Removal

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

Spectating the TrojanDownloader:Win32/SmallAgent!atmn detection usually means that your system is in big danger. This computer virus can correctly be identified as ransomware – virus which encrypts your files and asks you to pay for their decryption. Deleteing it requires some unusual steps that must be done as soon as possible.

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TrojanDownloader:Win32/SmallAgent!atmn detection is a malware detection you can spectate in your system. It generally shows up after the provoking procedures on your computer – opening the dubious email messages, clicking the banner in the Internet or mounting the program from untrustworthy sources. From the instance it shows up, you have a short time to do something about it before it starts its harmful activity. And be sure – it is far better not to wait for these destructive actions.

What is TrojanDownloader:Win32/SmallAgent!atmn virus?

TrojanDownloader:Win32/SmallAgent!atmn is ransomware-type malware. It looks for the documents on your disks, encrypts it, and then asks you to pay the ransom for getting the decryption key. Besides making your files inaccessible, this malware also does a ton of damage to your system. It alters the networking settings in order to avoid you from reading the elimination guides or downloading the anti-malware program. In some cases, TrojanDownloader:Win32/SmallAgent!atmn can additionally prevent the setup of anti-malware programs.

TrojanDownloader:Win32/SmallAgent!atmn Summary

In summary, TrojanDownloader:Win32/SmallAgent!atmn ransomware actions in the infected system are next:

  • Sample contains Overlay data;
  • The binary contains an unknown PE section name indicative of packing;
  • Authenticode signature is invalid;
  • Attempts to modify proxy settings;
  • Ciphering the documents located on the victim’s drives — so the victim cannot use these documents;
  • Blocking the launching of .exe files of anti-virus programs
  • Blocking the launching of installation files of anti-malware programs

Ransomware has been a major problem for the last 4 years. It is challenging to realize a more damaging virus for both individuals and organizations. The algorithms utilized in TrojanDownloader:Win32/SmallAgent!atmn (typically, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have more time than our galaxy currently exists, and possibly will exist. But that malware does not do all these terrible things without delay – it may take up to several hours to cipher all of your documents. Thus, seeing the TrojanDownloader:Win32/SmallAgent!atmn detection is a clear signal that you should begin the elimination process.

Where did I get the TrojanDownloader:Win32/SmallAgent!atmn?

Standard tactics of TrojanDownloader:Win32/SmallAgent!atmn distribution are basic for all other ransomware examples. Those are one-day landing websites where users are offered to download the free software, so-called bait e-mails and hacktools. Bait emails are a quite modern tactic in malware distribution – you get the email that mimics some routine notifications about shipments or bank service conditions modifications. Inside of the email, there is a malicious MS Office file, or a web 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 fairly uncomplicated, however, still needs a lot of recognition. Malware can hide in various spots, and it is far better to prevent it even before it invades your system than to trust in an anti-malware program. Common cybersecurity awareness is just an important thing in the modern-day world, even if your interaction with a computer remains on YouTube videos. That may keep you a lot of time and money which you would certainly spend while trying to find a fixing guide.

TrojanDownloader:Win32/SmallAgent!atmn malware technical details

File Info:

name: A0C37B43FE6F2708F73A.mlw
path: /opt/CAPEv2/storage/binaries/f2ae7536d502e0ca6a93a43515e47e800e305b2763a198d5aab25ca3bef5451a
crc32: 2F595A00
md5: a0c37b43fe6f2708f73a988297a5c2e7
sha1: 91a0a1cffbfbc9728224d23620e435118905142d
sha256: f2ae7536d502e0ca6a93a43515e47e800e305b2763a198d5aab25ca3bef5451a
sha512: a1593de81764958fa5162e71cc490c351be42902bcea172cd0eed6cd31dc5ebd6c9483345c9760944534dbe861752965df6c50a9537d107627b79c30dacc28a1
ssdeep: 49152:KfoOvtpBd4CafaCJrMtvMGPqceTZhTkBjPDFlwyj:6oOVOC4aCBMtvMGP1eTZhABLDFlwy
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T170A56B01F850A466DB823072ED2DE6396B287E1D87F248F3B6947CD87F751D2313A19A
sha3_384: 8e394aadaba53cea91be4bd98df55587c81a9b74168304b4702b839367c79a548d1796c1cda7c036b1db87b302cc54c1
ep_bytes: 558bec81ec78090000e8e20c00008985
timestamp: 1970-01-01 15:50:05

Version Info:

CompanyName: Opera Software
FileDescription: Opera Browser Assistant Installer
FileVersion: 92.0.4561.21
InternalName: Opera
LegalCopyright: Copyright Opera Software 2022
ProductName: Opera Browser Assistant Installer
ProductVersion: 92.0.4561.21
Translation: 0x0409 0x04b0

TrojanDownloader:Win32/SmallAgent!atmn also known as:

Elasticmalicious (high confidence)
K7AntiVirusVirus ( 0055485e1 )
K7GWVirus ( 0055485e1 )
CynetMalicious (score: 100)
AvastWin32:DeadZero [Inf]
EmsisoftGen:Variant.Ransom.GandCrab.2689 (B)
MAXmalware (ai score=89)
RisingWorm.Phorpiex!1.BB1C (CLASSIC)
AVGWin32:DeadZero [Inf]
CrowdStrikewin/malicious_confidence_100% (W)

How to remove TrojanDownloader:Win32/SmallAgent!atmn?

TrojanDownloader:Win32/SmallAgent!atmn malware is incredibly difficult to erase manually. It places its documents in several locations throughout the disk, and can get back itself from one of the parts. Moreover, a lot of modifications in the registry, networking configurations and also Group Policies are fairly hard to find and return to the original. It is better to use a special tool – exactly, an anti-malware app. GridinSoft Anti-Malware will definitely fit the best for malware removal goals.

Remove TrojanDownloader:Win32/SmallAgent!atmn 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 TrojanDownloader:Win32/SmallAgent!atmn 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 TrojanDownloader:Win32/SmallAgent!atmn 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 TrojanDownloader:Win32/SmallAgent!atmn 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 TrojanDownloader:Win32/SmallAgent!atmn 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 “TrojanDownloader:Win32/SmallAgent!atmn” 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 TrojanDownloader:Win32/SmallAgent!atmn Virus

Step 4: Remove Found Threats:

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

Searching TrojanDownloader:Win32/SmallAgent!atmn 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 TrojanDownloader:Win32/SmallAgent!atmn 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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