Troj/Krypt-FV

Seeing the Troj/Krypt-FV detection name means that your PC is in big danger. This virus can correctly be identified as ransomware – type of malware which encrypts your files and asks you to pay for their decryption. Deleteing it requires some unusual steps that must be taken as soon as possible.

Troj/Krypt-FV detection is a malware detection you can spectate in your system. It generally appears after the preliminary procedures on your computer – opening the untrustworthy e-mail messages, clicking the banner in the Web or mounting the program from unreliable sources. From the instance it shows up, you have a short time to do something about it until it starts its destructive activity. And be sure – it is better not to wait for these harmful actions.

What is Troj/Krypt-FV virus?

Troj/Krypt-FV is ransomware-type malware. It searches for the files on your disks, encrypts it, and after that asks you to pay the ransom for receiving the decryption key. Besides making your documents locked, this malware also does a lot of harm to your system. It modifies the networking setups in order to avoid you from checking out the elimination tutorials or downloading the anti-malware program. In rare cases, Troj/Krypt-FV can even prevent the setup of anti-malware programs.

Troj/Krypt-FV Summary

In summary, Troj/Krypt-FV ransomware activities in the infected computer are next:

  • SetUnhandledExceptionFilter detected (possible anti-debug);
  • Behavioural detection: Executable code extraction – unpacking;
  • Yara rule detections observed from a process memory dump/dropped files/CAPE;
  • Creates RWX memory;
  • Possible date expiration check, exits too soon after checking local time;
  • Dynamic (imported) function loading detected;
  • A process created a hidden window;
  • CAPE extracted potentially suspicious content;
  • Unconventionial language used in binary resources: Uzbek (Latin);
  • The binary contains an unknown PE section name indicative of packing;
  • The binary likely contains encrypted or compressed data.;
  • Authenticode signature is invalid;
  • Behavioural detection: Injection (Process Hollowing);
  • Executed a process and injected code into it, probably while unpacking;
  • Detects Sandboxie through the presence of a library;
  • Detects Avast Antivirus through the presence of a library;
  • Behavioural detection: Injection (inter-process);
  • Created a process from a suspicious location;
  • Checks the presence of disk drives in the registry, possibly for anti-virtualization;
  • Ciphering the documents located on the victim’s disks — so the victim cannot use these files;
  • 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 horror story for the last 4 years. It is challenging to picture a more dangerous virus for both individuals and companies. The algorithms utilized in Troj/Krypt-FV (generally, 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 without delay – it can take up to several hours to cipher all of your files. Thus, seeing the Troj/Krypt-FV detection is a clear signal that you have to begin the clearing procedure.

Where did I get the Troj/Krypt-FV?

Common ways of Troj/Krypt-FV injection are common 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 emails are a relatively modern method in malware spreading – you receive the e-mail that imitates some normal notifications about deliveries or bank service conditions updates. Within the e-mail, there is an infected 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 fairly simple, however, still requires a lot of attention. Malware can hide in different places, and it is much better to stop it even before it goes into your system than to rely upon an anti-malware program. General cybersecurity knowledge is just an important thing in the modern world, even if your interaction with a computer stays on YouTube videos. That can keep you a lot of time and money which you would spend while trying to find a fix guide.

Troj/Krypt-FV malware technical details

File Info:

name: 39ADF3F9F240AEA136C3.mlwpath: /opt/CAPEv2/storage/binaries/9b6dea6b5a7747d21327e04430b02a63d4e3cd6cf3fcfebc876c94fb6e6c2a64crc32: 259D1399md5: 39adf3f9f240aea136c3b5e631c316d8sha1: 7952568bb436970a90e2d0a1d1a10ce3cad01799sha256: 9b6dea6b5a7747d21327e04430b02a63d4e3cd6cf3fcfebc876c94fb6e6c2a64sha512: 468e9b083884535c183200e4c79532b445aaacee281591fa8616925b7ca3cdd71c509787370dd65b33db53b7ee211c42f3981c493b84132bc50d2e61fea219f5ssdeep: 6144:40NE4eQGcN/2PiTNb1mOzdveIaU0Z3mzGVt/EB20uCtnjA:jNpfxJ1pzZeIaUQU4t/JZtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1D8447D14BB90D034F5B712F4497993A9BA3ABEF19B2490CB62D52AED57346E0EC30317sha3_384: 5792297c455bd2bb2db9c3de0730cbc0a12b3ee95ae8d0b78c1560e714283e4ebe7b832bcc132ec02c3b2c58c0375751ep_bytes: 8bff558bece826d10000e8110000005dtimestamp: 2021-11-08 12:28:33

Version Info:

0: [No Data]

Troj/Krypt-FV also known as:

Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
FireEye Generic.mg.39adf3f9f240aea1
CAT-QuickHeal Ransom.Stop.P5
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Cyren W32/Kryptik.GTL.gen!Eldorado
tehtris Generic.Malware
APEX Malicious
Kaspersky UDS:DangerousObject.Multi.Generic
Avast FileRepMalware [Drp]
McAfee-GW-Edition BehavesLike.Win32.Lockbit.dh
Trapmine malicious.moderate.ml.score
Sophos Troj/Krypt-FV
SentinelOne Static AI – Malicious PE
Microsoft Ransom:Win32/StopCrypt!ml
Cynet Malicious (score: 100)
Acronis suspicious
McAfee Packed-GEE!39ADF3F9F240
VBA32 Malware-Cryptor.Azorult.gen
Malwarebytes Trojan.Agent.UKED
Rising [email protected] (RDML:FsBNu4pRAjNJJeicBEyodA)
Ikarus Trojan-Ransom.StopCrypt
MaxSecure Trojan.Malware.300983.susgen
AVG FileRepMalware [Drp]
Cybereason malicious.bb4369

How to remove Troj/Krypt-FV?

About the author

Robert Bailey

Security engineer focused on malware behavior, removal workflows, and Windows hardening. Robert reviews threat articles for practical accuracy, checking detection names, symptoms, and cleanup steps before publication.

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