Win32/Otfrem.B

Spectating the Win32/Otfrem.B detection name usually means that your computer is in big danger. This virus can correctly be named as ransomware – type of malware which ciphers your files and forces you to pay for their decryption. Deleteing it requires some specific steps that must be done as soon as possible.

Win32/Otfrem.B detection is a malware detection you can spectate in your system. It frequently appears after the provoking activities on your PC – opening the untrustworthy email, clicking the advertisement in the Web or setting up the program from dubious sources. From the second it shows up, you have a short time to act until it starts its harmful activity. And be sure – it is much better not to await these malicious actions.

What is Win32/Otfrem.B virus?

Win32/Otfrem.B is ransomware-type malware. It searches 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 additionally does a lot of harm to your system. It changes the networking setups in order to prevent you from checking out the removal articles or downloading the antivirus. In some cases, Win32/Otfrem.B can also block the setup of anti-malware programs.

Win32/Otfrem.B Summary

Summarizingly, Win32/Otfrem.B ransomware actions in the infected system are next:

  • Authenticode signature is invalid;
  • Anomalous binary characteristics;
  • Encrypting the files kept on the target’s disks — so the victim cannot open these files;
  • Blocking the launching of .exe files of security tools
  • Blocking the launching of installation files of security tools

Ransomware has actually been a headache for the last 4 years. It is hard to realize a more harmful malware for both individuals and companies. The algorithms utilized in Win32/Otfrem.B (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 currently exists, and possibly will exist. However, 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 Win32/Otfrem.B detection is a clear signal that you must start the elimination procedure.

Where did I get the Win32/Otfrem.B?

Typical tactics of Win32/Otfrem.B injection are usual for all other ransomware examples. Those are one-day landing web pages where victims are offered to download the free software, so-called bait emails and hacktools. Bait e-mails are a quite new method in malware distribution – you get the e-mail that simulates some normal notifications about deliveries or bank service conditions shifts. Within the e-mail, 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.

Avoiding it looks fairly uncomplicated, but still demands a lot of focus. Malware can hide in various spots, and it is far better to prevent 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-day 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 spend while searching for a fixing guide.

Win32/Otfrem.B malware technical details

File Info:

name: CF410542700EDFA5A3C4.mlwpath: /opt/CAPEv2/storage/binaries/d06a07ef5027bd351b20f38a9f37f222f1c027737a611094948be0188b4aa9d7crc32: 84F1D8A3md5: cf410542700edfa5a3c4fd9e7b49cdb6sha1: 6027927a09079899c3816a8e774c322e2902faedsha256: d06a07ef5027bd351b20f38a9f37f222f1c027737a611094948be0188b4aa9d7sha512: 78e92c0d6ea182d300a728a6af0d8353540a2963e7f2d503141ae68a75869b039cb89cbf76a4b436af984b6d9d2715b846df88c699560d271102f8fee752ff1dssdeep: 1536:S4+aEpOwd/VxDy/i4+aEpOwd/VxDy/5X2++jCx3kdjKsPGR7ehp3vmLvsZIZwTc/:obpDC4bpDCw1p3vmLvsZIaVtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T165D37316F710941AF54280B53528E2BBB91A2D721685EC03FB866F5838B47D7F4F4B0Bsha3_384: 4293ed4c984fcb11cda0452b900296ccc3fe91a4f06b9d9dea49dd8ad7268a3b475fa8e967613c4f2dd78a83acaea037ep_bytes: 687c224000e8f0ffffff000000000000timestamp: 2008-11-16 03:29:47

Version Info:

0: [No Data]

Win32/Otfrem.B also known as:

Bkav W32.AIDetect.malware1
Lionic Trojan.Win32.Lunam.tn6c
Elastic malicious (high confidence)
DrWeb Win32.HLLW.Autoruner.48319
MicroWorld-eScan Trojan.GenericKD.40647399
FireEye Generic.mg.cf410542700edfa5
ALYac Trojan.GenericKD.40647399
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_90% (W)
Alibaba Trojan:Win32/Lunam.33b
K7GW Trojan ( 0054dc901 )
K7AntiVirus Trojan ( 0054dc901 )
BitDefenderTheta Gen:NN.ZevbaF.34182.imW@aq1xs8f
VirIT Trojan.Win32.VBCrypt.ELK
Cyren W32/Barys.AU.gen!Eldorado
Symantec W32.SillyFDC.BCR
ESET-NOD32 a variant of Win32/Otfrem.B
TrendMicro-HouseCall TROJ_GEN.R002C0OB122
Paloalto generic.ml
ClamAV Win.Malware.Lunam-6749633-0
Kaspersky Trojan.Win32.Lunam.a
BitDefender Trojan.GenericKD.40647399
NANO-Antivirus Trojan.Win32.Lunam.endniy
Avast Win32:Malware-gen
Tencent Win32.Virus.Otfrem.Taon
Emsisoft Trojan.GenericKD.40647399 (B)
Comodo TrojWare.Win32.Spy.Agent.1396070@1qn3u3
Baidu Win32.Trojan.Otfrem.b
McAfee-GW-Edition BehavesLike.Win32.Generic.cm
Sophos ML/PE-A + Mal/SillyFDC-K
Ikarus Trojan.VB.Crypt
Jiangmin Trojan/Lunam.b
Avira TR/Patched.Ren.Gen
MAX malware (ai score=85)
Antiy-AVL Trojan/Generic.ASBOL.C599
Microsoft Trojan:Win32/Sabsik.FL.B!ml
ZoneAlarm Trojan.Win32.Lunam.a
GData Trojan.GenericKD.40647399
Cynet Malicious (score: 100)
McAfee Generic VB.b
VBA32 Trojan.Lunam
Malwarebytes Ransom.Agent.ED
APEX Malicious
Rising Virus.Otfrem!8.6E8 (CLOUD)
SentinelOne Static AI – Malicious PE
Fortinet W32/Lunam.A!tr
AVG Win32:Malware-gen
Cybereason malicious.2700ed
Panda Trj/CI.A

How to remove Win32/Otfrem.B?

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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