Sf:Crypt-BT [Trj] Virus Removal

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

Seeing the Sf:Crypt-BT [Trj] malware detection usually means that your computer is in big danger. This computer virus can correctly be named as ransomware – virus which ciphers your files and asks you to pay for their decryption. Removing it requires some peculiar steps that must be done as soon as possible.

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Sf:Crypt-BT [Trj] detection is a malware detection you can spectate in your computer. It usually appears after the provoking activities on your PC – opening the suspicious email messages, clicking the banner in the Web or setting up the program from untrustworthy resources. From the instance it shows up, you have a short time to do something about it until it starts its malicious action. And be sure – it is far better not to await these destructive effects.

What is Sf:Crypt-BT [Trj] virus?

Sf:Crypt-BT [Trj] is ransomware-type malware. It looks for the documents on your disk, ciphers it, and then asks you to pay the ransom for receiving the decryption key. Besides making your documents inaccessible, this virus additionally does a ton of damage to your system. It alters the networking settings in order to prevent you from reading the removal guidelines or downloading the antivirus. In some cases, Sf:Crypt-BT [Trj] can additionally prevent the launching of anti-malware programs.

Sf:Crypt-BT [Trj] Summary

In total, Sf:Crypt-BT [Trj] malware activities in the infected system are next:

  • Sample contains Overlay data;
  • Uses Windows utilities for basic functionality;
  • Performs HTTP requests potentially not found in PCAP.;
  • Reads data out of its own binary image;
  • CAPE extracted potentially suspicious content;
  • Drops a binary and executes it;
  • The binary likely contains encrypted or compressed data.;
  • Authenticode signature is invalid;
  • Behavioural detection: Injection (inter-process);
  • Behavioural detection: Injection with CreateRemoteThread in a remote process;
  • Attempts to modify proxy settings;
  • Deletes executed files from disk;
  • Collects information to fingerprint the system;
  • Yara detections observed in process dumps, payloads or dropped files;
  • Ciphering the documents located on the target’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 apps

Ransomware has actually been a nightmare for the last 4 years. It is challenging to imagine a more hazardous malware for both individual users and companies. The algorithms used in Sf:Crypt-BT [Trj] (typically, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need to have a lot more time than our galaxy actually exists, and possibly will exist. But that virus does not do all these unpleasant things immediately – it may take up to several hours to cipher all of your files. Thus, seeing the Sf:Crypt-BT [Trj] detection is a clear signal that you must start the clearing process.

Where did I get the Sf:Crypt-BT [Trj]?

Standard methods of Sf:Crypt-BT [Trj] spreading are typical for all other ransomware examples. Those are one-day landing sites where users are offered to download and install the free program, so-called bait e-mails and hacktools. Bait e-mails are a pretty modern tactic in malware spreading – you get the email that imitates some regular notifications about shipments or bank service conditions updates. Inside of the email, 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.

Avoiding it looks fairly simple, however, still needs tons of attention. Malware can hide in different places, and it is much better to stop it even before it invades your system than to depend on an anti-malware program. General cybersecurity knowledge is just an important thing in the modern world, even if your relationship with a computer stays on YouTube videos. That can keep you a great deal of time and money which you would certainly spend while looking for a solution.

Sf:Crypt-BT [Trj] malware technical details

File Info:

name: E964264C54CCEBD4DA20.mlw
path: /opt/CAPEv2/storage/binaries/23d5e55fad57b1bf0f6a934c958e554fba139a7a2926b69b7c290a5f95a2887f
crc32: E4F5DCB9
md5: e964264c54ccebd4da20a0997894401d
sha1: e1ae3ab5ed27b4a7f308ab6725d76b376a943eb6
sha256: 23d5e55fad57b1bf0f6a934c958e554fba139a7a2926b69b7c290a5f95a2887f
sha512: 3dacbb2cdf39586d529b3a91f3fa304a3961e97e9a88532c12a8d05934ab0cb63ab429d416e372373bd57c086038056c427970987a33e49d460f19bf6aa86b18
ssdeep: 3072:/im2sIUqeDPaHAfKDnyuxzP1L77fni/IG1shn662vhoi2j6fEzby5Ax:/i4TqeDPagfKDnyurjq/IRUv6iGy5Ax
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1BFD3B07AF481D0B5C9973674DEA9B62623FFCE2020399C93E3980D5528B5853B72E347
sha3_384: 8dddd3185b6e329fac10b1c51a13c2a546b90e7f08b9093665ba62295b50cbe983871f408dc2b7278f882a3298c8eecd
ep_bytes: 558bec83ec0c536a0032dbe89deeffff
timestamp: 2012-02-26 10:44:29

Version Info:

0: [No Data]

Sf:Crypt-BT [Trj] also known as:

Bkav W32.AIDetectMalware
Lionic Trojan.Win32.Zbot.l!c
Elastic malicious (high confidence)
DrWeb Trojan.PWS.Panda.368
MicroWorld-eScan Gen:Variant.Ransom.Natas.3
FireEye Generic.mg.e964264c54ccebd4
CAT-QuickHeal Trojan.Necurs.MUE.A3
Skyhigh BehavesLike.Win32.PWSZbot.ch
McAfee PWS-Zbot.gen.ave
Zillya Trojan.Zbot.Win32.60603
Sangfor Trojan.Win32.Save.a
K7AntiVirus Spyware ( 002891031 )
Alibaba TrojanPSW:Win32/GenMalicious.f3ae3aff
K7GW Spyware ( 002891031 )
CrowdStrike win/malicious_confidence_100% (D)
BitDefenderTheta Gen:NN.ZexaF.36744.imX@aucwBqf
VirIT Trojan.Win32.Generic.BXBH
Symantec Trojan.Zbot
tehtris Generic.Malware
ESET-NOD32 a variant of Win32/Spy.Zbot.YW
APEX Malicious
ClamAV Win.Spyware.Zbot-1275
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Gen:Variant.Ransom.Natas.3
NANO-Antivirus Trojan.Win32.Panda.ssflk
Avast Sf:Crypt-BT [Trj]
Tencent Trojan.Win32.Zbot.aaw
Emsisoft Gen:Variant.Ransom.Natas.3 (B)
Google Detected
F-Secure Trojan.TR/Kazy.MK
Baidu Win32.Trojan.Zbot.a
VIPRE Gen:Variant.Ransom.Natas.3
TrendMicro Cryp_Xin1
Trapmine malicious.high.ml.score
Sophos Troj/PWS-BSF
SentinelOne Static AI – Malicious PE
GData Gen:Variant.Ransom.Natas.3
Jiangmin Trojan/Generic.abgnz
Webroot W32.Infostealer.Zeus
Varist W32/Zbot.BR.gen!Eldorado
Avira TR/Kazy.MK
MAX malware (ai score=100)
Antiy-AVL Trojan[Spy]/Win32.Zbot
Kingsoft malware.kb.a.1000
Xcitium Malware@#22bjw6zhc3siw
Arcabit Trojan.Ransom.Natas.3
ViRobot Trojan.Win32.A.Zbot.135680.AW
ZoneAlarm HEUR:Trojan.Win32.Generic
Microsoft PWS:Win32/Zbot!CI
Cynet Malicious (score: 100)
AhnLab-V3 Win-Trojan/Malpacked3.Gen
Acronis suspicious
ALYac Gen:Variant.Ransom.Natas.3
TACHYON Trojan-Spy/W32.ZBot.135680.BZ
VBA32 SScope.Trojan.FakeAV.01110
Cylance unsafe
Panda Trj/Genetic.gen
TrendMicro-HouseCall Cryp_Xin1
Rising Spyware.Zbot!1.648A (CLASSIC)
Yandex Trojan.GenAsa!gPxoCHHDNXw
Ikarus Trojan-Spy.Banker.Citadel
MaxSecure Trojan.Malware.7164915.susgen
Fortinet W32/Zbot.AAU!tr
AVG Sf:Crypt-BT [Trj]
Cybereason malicious.5ed27b
DeepInstinct MALICIOUS

How to remove Sf:Crypt-BT [Trj]?

Sf:Crypt-BT [Trj] malware is incredibly difficult to remove by hand. It places its files in multiple places throughout the disk, and can get back itself from one of the elements. In addition, numerous modifications in the windows registry, networking setups and also Group Policies are pretty hard to locate and revert to the original. It is better to make use of a specific app – exactly, an anti-malware app. GridinSoft Anti-Malware will definitely fit the best for malware removal reasons.

<”h3″ style="text-align: center">Remove ”Sf:Crypt-BT 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 Malware as shown from our tests with the software, and we assure you that it can remove ”Sf:Crypt-BT 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 gridinsoft.com.

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 ”Sf:Crypt-BT Malware

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 ”Sf:Crypt-BT 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 ”Sf:Crypt-BT 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.

<”h3″>Trojan Killer for "”Sf:Crypt-BT" 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 (gridinsoft.com) 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 ”Sf:Crypt-BT Virus

Step 4: Remove Found Threats:

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

Searching ”Sf:Crypt-BT 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 ”Sf:Crypt-BT 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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