Win32/Otfrem.B

Written by Robert Bailey
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.
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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.mlw
path: /opt/CAPEv2/storage/binaries/d06a07ef5027bd351b20f38a9f37f222f1c027737a611094948be0188b4aa9d7
crc32: 84F1D8A3
md5: cf410542700edfa5a3c4fd9e7b49cdb6
sha1: 6027927a09079899c3816a8e774c322e2902faed
sha256: d06a07ef5027bd351b20f38a9f37f222f1c027737a611094948be0188b4aa9d7
sha512: 78e92c0d6ea182d300a728a6af0d8353540a2963e7f2d503141ae68a75869b039cb89cbf76a4b436af984b6d9d2715b846df88c699560d271102f8fee752ff1d
ssdeep: 1536:S4+aEpOwd/VxDy/i4+aEpOwd/VxDy/5X2++jCx3kdjKsPGR7ehp3vmLvsZIZwTc/:obpDC4bpDCw1p3vmLvsZIaV
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T165D37316F710941AF54280B53528E2BBB91A2D721685EC03FB866F5838B47D7F4F4B0B
sha3_384: 4293ed4c984fcb11cda0452b900296ccc3fe91a4f06b9d9dea49dd8ad7268a3b475fa8e967613c4f2dd78a83acaea037
ep_bytes: 687c224000e8f0ffffff000000000000
timestamp: 2008-11-16 03:29:47

Version Info:

0: [No Data]

Win32/Otfrem.B also known as:

BkavW32.AIDetect.malware1
LionicTrojan.Win32.Lunam.tn6c
Elasticmalicious (high confidence)
DrWebWin32.HLLW.Autoruner.48319
MicroWorld-eScanTrojan.GenericKD.40647399
FireEyeGeneric.mg.cf410542700edfa5
ALYacTrojan.GenericKD.40647399
CylanceUnsafe
SangforTrojan.Win32.Save.a
CrowdStrikewin/malicious_confidence_90% (W)
AlibabaTrojan:Win32/Lunam.33b
K7GWTrojan ( 0054dc901 )
K7AntiVirusTrojan ( 0054dc901 )
BitDefenderThetaGen:NN.ZevbaF.34182.imW@aq1xs8f
VirITTrojan.Win32.VBCrypt.ELK
CyrenW32/Barys.AU.gen!Eldorado
SymantecW32.SillyFDC.BCR
ESET-NOD32a variant of Win32/Otfrem.B
TrendMicro-HouseCallTROJ_GEN.R002C0OB122
Paloaltogeneric.ml
ClamAVWin.Malware.Lunam-6749633-0
KasperskyTrojan.Win32.Lunam.a
BitDefenderTrojan.GenericKD.40647399
NANO-AntivirusTrojan.Win32.Lunam.endniy
AvastWin32:Malware-gen
TencentWin32.Virus.Otfrem.Taon
EmsisoftTrojan.GenericKD.40647399 (B)
ComodoTrojWare.Win32.Spy.Agent.1396070@1qn3u3
BaiduWin32.Trojan.Otfrem.b
McAfee-GW-EditionBehavesLike.Win32.Generic.cm
SophosML/PE-A + Mal/SillyFDC-K
IkarusTrojan.VB.Crypt
JiangminTrojan/Lunam.b
AviraTR/Patched.Ren.Gen
MAXmalware (ai score=85)
Antiy-AVLTrojan/Generic.ASBOL.C599
MicrosoftTrojan:Win32/Sabsik.FL.B!ml
ZoneAlarmTrojan.Win32.Lunam.a
GDataTrojan.GenericKD.40647399
CynetMalicious (score: 100)
McAfeeGeneric VB.b
VBA32Trojan.Lunam
MalwarebytesRansom.Agent.ED
APEXMalicious
RisingVirus.Otfrem!8.6E8 (CLOUD)
SentinelOneStatic AI – Malicious PE
FortinetW32/Lunam.A!tr
AVGWin32:Malware-gen
Cybereasonmalicious.2700ed
PandaTrj/CI.A

How to remove Win32/Otfrem.B?

Win32/Otfrem.B malware is extremely hard to remove by hand. It stores its data in multiple places throughout the disk, and can restore itself from one of the parts. Additionally, a number of alterations in the registry, networking configurations and also Group Policies are pretty hard to locate and return to the original. It is much better to utilize a specific tool – exactly, an anti-malware app. GridinSoft Anti-Malware will definitely fit the best for virus removal objectives.

Why GridinSoft Anti-Malware? It is really lightweight and has its detection databases updated just about every hour. In addition, it does not have such bugs and vulnerabilities as Microsoft Defender does. The combination of these facts makes GridinSoft Anti-Malware suitable for getting rid of malware of any kind.

Remove the viruses with GridinSoft Anti-Malware

  • Download and install GridinSoft Anti-Malware. After the installation, you will be offered to perform the Standard Scan. Approve this action.
  • Gridinsoft Anti-Malware during the scan process

  • Standard scan checks the logical disk where the system files are stored, together with the files of programs you have already installed. The scan lasts up to 6 minutes.
  • GridinSoft Anti-Malware scan results

  • When the scan is over, you may choose the action for each detected virus. For all files of [SHORT_NAME] the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning
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About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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