Trojan:Win32/Koobface.K Virus Removal

Seeing the Trojan:Win32/Koobface.K detection name usually means that your computer is in big danger. This computer virus can correctly be identified as ransomware – virus which ciphers your files and forces you to pay for their decryption. Deleteing it requires some unusual steps that must be taken as soon as possible.

Trojan:Win32/Koobface.K detection is a virus detection you can spectate in your computer. It usually shows up after the preliminary activities on your computer – opening the untrustworthy email, clicking the advertisement in the Internet or setting up the program from suspicious sources. From the second it shows up, you have a short time to act before it starts its harmful activity. And be sure – it is better not to await these malicious actions.

What is Trojan:Win32/Koobface.K virus?

Trojan:Win32/Koobface.K is ransomware-type malware. It looks for the documents on your disk drive, ciphers it, and after that asks you to pay the ransom for getting the decryption key. Besides making your files locked, this malware also does a lot of harm to your system. It modifies the networking settings in order to prevent you from looking for the elimination tutorials or downloading the anti-malware program. In some cases, Trojan:Win32/Koobface.K can additionally block the setup of anti-malware programs.

Trojan:Win32/Koobface.K Summary

In total, Trojan:Win32/Koobface.K virus activities in the infected computer are next:

  • Sample contains Overlay data;
  • Unconventionial binary language: Russian;
  • Unconventionial language used in binary resources: Russian;
  • 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;
  • Yara detections observed in process dumps, payloads or dropped files;
  • Encrypting the documents located on the target’s disk — so the victim cannot open these files;
  • Blocking the launching of .exe files of anti-malware programs
  • Blocking the launching of installation files of security tools

Ransomware has been a major problem for the last 4 years. It is difficult to picture a more dangerous malware for both individual users and businesses. The algorithms utilized in Trojan:Win32/Koobface.K (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 already exists, and possibly will exist. However, that virus does not do all these bad things immediately – it can require up to a few hours to cipher all of your files. Therefore, seeing the Trojan:Win32/Koobface.K detection is a clear signal that you must begin the removal procedure.

Where did I get the Trojan:Win32/Koobface.K?

Usual ways of Trojan:Win32/Koobface.K injection are standard for all other ransomware variants. Those are one-day landing sites where users are offered to download the free software, so-called bait e-mails and hacktools. Bait e-mails are a pretty new tactic in malware distribution – you receive the e-mail that imitates some standard notifications about deliveries or bank service conditions modifications. Inside of the email, there is an infected 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 quite easy, but still demands a lot of awareness. Malware can hide in various places, and it is far better to prevent it even before it goes into your PC than to rely upon an anti-malware program. Simple cybersecurity awareness is just an important thing in the modern-day world, even if your relationship with a PC stays on YouTube videos. That can save you a great deal of time and money which you would certainly spend while seeking a fixing guide.

Trojan:Win32/Koobface.K malware technical details

File Info:

name: 18812D503DEE9ACC26BA.mlwpath: /opt/CAPEv2/storage/binaries/032a8e35be5406d2b61287ad40a91eb5aa6178f36da9a432ee2a3528fd953e7dcrc32: B8A5E954md5: 18812d503dee9acc26baf353d58a5462sha1: e33364c1200b8cc79a7a68b819000b51e5d83669sha256: 032a8e35be5406d2b61287ad40a91eb5aa6178f36da9a432ee2a3528fd953e7dsha512: fe1885eb7b060e90b8d6b6c7f2ed95272e2f8125ef9e8b0553d9df858ff57dfc1dce2f0a9a8d2bebc3af38f63c229955384058c60430bc3d1738b90182e23e4cssdeep: 1536:YoYHOJZGCzsDor44jCojxkwaknRFHQAAD8lco+T1ikF0kBpUx:Yoj3z44jC4xkhkRFwP4lL+T1ikvpUxtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1B643F215EEA9481FF19B5EB200DB4FD3307B718EDF5A0BA80E4A902639748CC25D6D79sha3_384: dfa61816b4cf918d5f23201b2c628b1b0a6ad9d20fab59d0348bb500a6dce48e2ac3b4179026a702f309cb950e560ed6ep_bytes: 60be006041008dbe00b0feff57eb0b90timestamp: 2011-04-28 12:59:11

Version Info:

CompanyName: Windows ServiceFileDescription: Windows ServiceFileVersion: 1.0.0.1InternalName: NotifyLegalCopyright: Copyright (C) 2011ProductName: Windows ServiceProductVersion: 1.0.0.1Translation: 0x0419 0x04b0

Trojan:Win32/Koobface.K also known as:

Bkav W32.AIDetectMalware
Lionic Worm.Win32.Koobface.p!c
MicroWorld-eScan Gen:Variant.Ransom.Nemty.17
FireEye Generic.mg.18812d503dee9acc
Skyhigh GenericRXKI-GC!68AD72DFBF91
ALYac Gen:Variant.Ransom.Nemty.17
Cylance unsafe
Zillya Worm.Koobface.Win32.6766
Sangfor Trojan.Win32.Save.a
K7AntiVirus Riskware ( 0040eff71 )
Alibaba Worm:Win32/Koobface.ae347505
K7GW Riskware ( 0040eff71 )
Cybereason malicious.03dee9
BitDefenderTheta AI:Packer.DB2C6E951F
Symantec ML.Attribute.HighConfidence
Elastic malicious (moderate confidence)
ESET-NOD32 a variant of Win32/Spammer.Agent.J
APEX Malicious
TrendMicro-HouseCall TROJ_KOOBFACE_000000c.TOMA
ClamAV Win.Worm.Koobface-365
Kaspersky Net-Worm.Win32.Koobface.babd
BitDefender Gen:Variant.Ransom.Nemty.17
NANO-Antivirus Trojan.Win32.Koobface.kxzvx
Avast Win32:Downloader-GQF [Trj]
Tencent Malware.Win32.Gencirc.13c1b5fd
Emsisoft Gen:Variant.Ransom.Nemty.17 (B)
F-Secure Trojan.TR/Spy.Gen
DrWeb Win32.HLLW.Facebook.989
VIPRE Gen:Variant.Ransom.Nemty.17
TrendMicro TROJ_KOOBFACE_000000c.TOMA
Trapmine malicious.high.ml.score
Sophos Mal/Generic-S
SentinelOne Static AI – Malicious PE
Jiangmin Worm/Koobface.bof
Google Detected
Avira TR/Spy.Gen
Varist W32/Koobface.R.gen!Eldorado
Antiy-AVL Worm[Net]/Win32.Koobface
Kingsoft Win32.Troj.Undef.a
Microsoft Trojan:Win32/Koobface.K
Xcitium TrojWare.Win32.Agent.tmbl@3z144o
Arcabit Trojan.Ransom.Nemty.17
ViRobot Worm.Win32.A.Net-Koobface.57864.A[UPX]
ZoneAlarm Net-Worm.Win32.Koobface.babd
GData Gen:Variant.Ransom.Nemty.17
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Jorik.R4582
McAfee Artemis!18812D503DEE
MAX malware (ai score=100)
VBA32 BScope.Worm.Koobface
Panda Trj/Genetic.gen
Rising Trojan.Koobface!8.CD6 (TFE:5:1oO4FbbcIeP)
Yandex Worm.Koobface!uqicOsPUL/c
Ikarus Trojan.Win32.Jorik
MaxSecure Trojan.Malware.2076871.susgen
Fortinet W32/KoobFace.IED!tr
AVG Win32:Downloader-GQF [Trj]
DeepInstinct MALICIOUS
CrowdStrike win/malicious_confidence_100% (W)
alibabacloud Worm[net]:Win/Koobface.babd

How to remove Trojan:Win32/Koobface.K?

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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