TrojanDropper:Win32/Surldoe!A Virus Removal

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

Spectating the TrojanDropper:Win32/Surldoe!A detection name means that your PC is in big danger. This computer virus can correctly be identified as ransomware – type of malware which encrypts your files and asks you to pay for their decryption. Removing it requires some specific steps that must be done as soon as possible.

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TrojanDropper:Win32/Surldoe!A detection is a malware detection you can spectate in your system. It generally shows up after the preliminary actions on your PC – opening the suspicious e-mail messages, clicking the advertisement in the Internet or setting up the program from suspicious resources. From the instance it appears, you have a short time to do something about it before it starts its harmful action. And be sure – it is far better not to await these harmful actions.

What is TrojanDropper:Win32/Surldoe!A virus?

TrojanDropper:Win32/Surldoe!A is ransomware-type malware. It looks for the documents on your disk drives, ciphers it, and then asks you to pay the ransom for getting the decryption key. Besides making your documents locked, this virus also does a lot of damage to your system. It changes the networking settings in order to avoid you from reading the elimination guides or downloading the anti-malware program. Sometimes, TrojanDropper:Win32/Surldoe!A can even stop the launching of anti-malware programs.

TrojanDropper:Win32/Surldoe!A Summary

In summary, TrojanDropper:Win32/Surldoe!A malware activities in the infected computer are next:

  • Behavioural detection: Executable code extraction – unpacking;
  • Reads data out of its own binary image;
  • CAPE extracted potentially suspicious content;
  • Drops a binary and executes it;
  • 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);
  • Checks for the presence of known windows from debuggers and forensic tools;
  • Checks for the presence of known devices from debuggers and forensic tools;
  • Checks for the presence of known devices from debuggers and forensic tools;
  • Checks the version of Bios, possibly for anti-virtualization;
  • Detected Armadillo packer using a known mutex;
  • Detected Armadillo packer using a known registry key;
  • Attempts to interact with an Alternate Data Stream (ADS);
  • Created a service that was not started;
  • Collects information to fingerprint the system;
  • Installs WinPCAP;
  • Yara rule detections observed from a process memory dump/dropped files/CAPE;
  • Ciphering the files kept on the target’s disk drives — so the victim cannot check these files;
  • Blocking the launching of .exe files of anti-malware apps
  • Blocking the launching of installation files of anti-malware apps

Ransomware has been a major problem for the last 4 years. It is difficult to imagine a more harmful virus for both individuals and businesses. The algorithms used in TrojanDropper:Win32/Surldoe!A (generally, 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 actually exists, and possibly will exist. But that virus does not do all these unpleasant things instantly – it can require up to a few hours to cipher all of your files. Hence, seeing the TrojanDropper:Win32/Surldoe!A detection is a clear signal that you need to begin the clearing procedure.

Where did I get the TrojanDropper:Win32/Surldoe!A?

Usual methods of TrojanDropper:Win32/Surldoe!A spreading are usual for all other ransomware examples. Those are one-day landing web pages where users are offered to download the free software, so-called bait emails and hacktools. Bait e-mails are a quite modern method in malware spreading – you get the email that imitates some regular notifications about shippings or bank service conditions updates. Inside of the e-mail, there is a corrupted MS Office file, or a link which leads to the exploit landing site.

Malicious email spam

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

Avoiding it looks quite easy, however, still demands a lot of focus. Malware can hide in different places, and it is better to stop it even before it gets into your system than to rely upon an anti-malware program. Common cybersecurity awareness is just an important item in the modern world, even if your interaction with a PC remains on YouTube videos. That may keep you a lot of money and time which you would certainly spend while looking for a solution.

TrojanDropper:Win32/Surldoe!A malware technical details

File Info:

name: F30FDE8077316DD20E78.mlw
path: /opt/CAPEv2/storage/binaries/0f5739fec34bfdd5783e0227e386da060fed71b9ed076c93fa1a883365f7a02f
crc32: E96235EF
md5: f30fde8077316dd20e78ec0a240e4ac0
sha1: 628607bfb34166e0bdb68440954fb48a0bdb459f
sha256: 0f5739fec34bfdd5783e0227e386da060fed71b9ed076c93fa1a883365f7a02f
sha512: 4153d4480d99688a0ef5a45a97b8a5c5af016bd556924583850c227943ab1b82e2958da8f3de51c3f9870be8dc5a52fc7ddbb66ddb521538ae8f3a7e3daffa63
ssdeep: 24576:oTr7JB5IFJz07GuoUVNZpbq08VfsfpUztGVM+gzHugidSqunQe:ojJB5CJz07+UnZp4tLGVMZugidSlQ
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1C15523924045A1E4FBD32DF0562A76E4464B70271A4F73528F27CDD8DAB2DDBCB8290B
sha3_384: c5a800a946647b8c862cd55ba74e4a558d9815578cbb39c9c700db974822180e8522f9150b56af7d145a3b4bf85ededf
ep_bytes: 60be006096008dbe00b0a9ff5783cdff
timestamp: 1992-06-19 22:22:17

Version Info:

0: [No Data]

TrojanDropper:Win32/Surldoe!A also known as:

Lionic Trojan.Win32.KGen.kZ3j
tehtris Generic.Malware
MicroWorld-eScan Gen:Variant.Jaik.46054
Skyhigh GenericRXGB-VR!BDA95B1ACA8B
McAfee Artemis!F30FDE807731
Malwarebytes Malware.Heuristic.2047
VIPRE Gen:Variant.Jaik.46054
Sangfor Trojan.Win32.Surldoe.gen!A
K7AntiVirus Trojan ( 0055e3dd1 )
BitDefender Gen:Variant.Jaik.46054
K7GW Trojan ( 0055e3dd1 )
BitDefenderTheta AI:Packer.AFFE330A1F
Symantec ML.Attribute.HighConfidence
Elastic malicious (moderate confidence)
ESET-NOD32 a variant of Win32/TrojanDropper.Delf.NQG
Cynet Malicious (score: 100)
APEX Malicious
ClamAV Win.Malware.Vundo-9850571-0
Kaspersky Backdoor.Win32.SdBot.pyv
Alibaba TrojanDropper:Win32/SdBot.f9ab4c59
NANO-Antivirus Trojan.Win32.Bifrose.beqgh
ViRobot Backdoor.Win32.IRCBot.1377792
Rising Backdoor.SdBot!8.1E8 (CLOUD)
Sophos Mal/Generic-S
F-Secure Dropper.DR/Delphi.Gen
DrWeb BackDoor.Pigeon.12912
Zillya Backdoor.Hupigon.Win32.83993
Emsisoft Gen:Variant.Jaik.46054 (B)
Ikarus Trojan.Win32.ProcessHijack
GData Gen:Variant.Jaik.46054
Jiangmin Backdoor.SdBot.lf
Webroot W32.Malware.Gen
Varist W32/Backdoor.NFES-9296
Avira DR/Delphi.Gen
Antiy-AVL Trojan[Backdoor]/Win32.SdBot
Xcitium TrojWare.Win32.TrojanDropper.Agent.~YCA@197ro
Arcabit Trojan.Jaik.DB3E6
ZoneAlarm Backdoor.Win32.SdBot.pyv
Microsoft TrojanDropper:Win32/Surldoe.gen!A
Google Detected
AhnLab-V3 Worm/Win32.IRCBot.C39679
VBA32 Backdoor.SdBot
ALYac Gen:Variant.Jaik.46054
DeepInstinct MALICIOUS
Cylance unsafe
Panda Generic Malware
TrendMicro-HouseCall BKDR_SDBOT.RO
Tencent Backdoor.Win32.Sdbot.pyv
Yandex Worm.SdBot!hpiJ3e4Wuhs
SentinelOne Static AI – Malicious PE
MaxSecure Trojan.Malware.804895.susgen
Fortinet W32/Generic.AC.1F068E!tr
AVG Win32:Evo-gen [Trj]
Avast Win32:Evo-gen [Trj]
CrowdStrike win/malicious_confidence_100% (W)

How to remove TrojanDropper:Win32/Surldoe!A?

TrojanDropper:Win32/Surldoe!A malware is extremely difficult to remove manually. It places its files in multiple places throughout the disk, and can recover itself from one of the elements. Furthermore, a number of alterations in the windows registry, networking configurations and also Group Policies are fairly hard to find and revert to the initial. It is much better to utilize a special tool – exactly, an anti-malware program. GridinSoft Anti-Malware will definitely fit the best for virus elimination reasons.

Remove TrojanDropper:Win32/Surldoe!A 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 TrojanDropper:Win32/Surldoe!A 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 TrojanDropper:Win32/Surldoe!A 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 TrojanDropper:Win32/Surldoe!A 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 TrojanDropper:Win32/Surldoe!A 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 “TrojanDropper:Win32/Surldoe!A” 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 TrojanDropper:Win32/Surldoe!A Virus

Step 4: Remove Found Threats:

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

Searching TrojanDropper:Win32/Surldoe!A 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 TrojanDropper:Win32/Surldoe!A 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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