Win32/Bifrose.NKU removal guide

The Win32/Bifrose.NKU is considered dangerous by lots of security experts. When this infection is active, you may notice unwanted processes in Task Manager list. In this case, it is adviced to scan your computer with GridinSoft Anti-Malware.

GridinSoft Anti-Malware

Gridinsoft Anti-Malware

Removing PC viruses manually may take hours and may damage your PC in the process. We recommend using GridinSoft Anti-Malware for virus removal. Allows to complete scan and cure your PC during the trial period.

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What Win32/Bifrose.NKU virus can do?

Behavioural detection: Executable code extraction – unpacking
At least one process apparently crashed during execution
Dynamic (imported) function loading detected
Authenticode signature is invalid
Anomalous binary characteristics

How to determine Win32/Bifrose.NKU?


File Info:
name: 43FF75DF943495316040.mlw
path: /opt/CAPEv2/storage/binaries/00c7c93f51b34c175b9cd1c6c5ad3e135e898afe1a2de87c1a394ed4450da1d9
crc32: 607FCB1C
md5: 43ff75df94349531604058afe44da14c
sha1: 5a6d768699d3bc058e0e66fb1cbdb25e186d319a
sha256: 00c7c93f51b34c175b9cd1c6c5ad3e135e898afe1a2de87c1a394ed4450da1d9
sha512: 290c40bac506e1971788f430675b6fd0fda5154462008d08250f0d244254e2ee03cbeaaf42374dfdcf0211182d5bb4edb8ed1d2ed51f007bbe7b3c4e30a080f5
ssdeep: 1536:/ZDNDYrc9o0xwwlM12DBii3KRWrKIN00ACySXxuqEed0J88xQXmope3mye4vB/mg:RKcszg4gNV0ShQADQQxJS17UnmCg5v
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T131745F3E18B91237C1B4DAB6CBE68837F414E46B31126E36A4D78799870794379CB13E
sha3_384: 8ba9d0c706c0878d74084889331b6098d27634f3e0b18beffc6d85549c031ede7199b7fc3a6a09bb85154805c7888344
ep_bytes: 689c154000e8eeffffff000000000000
timestamp: 2011-10-17 01:47:09

Version Info:
Translation: 0x0409 0x04b0
Comments: IJTdYBQk
CompanyName: MjHNJUY
FileDescription: ShNgRVvjhbt
LegalCopyright: lcqAjjVIj
ProductName: cbrvypOeQGorL
FileVersion: 554.66.0056
ProductVersion: 554.66.0056
InternalName: Project1
OriginalFilename: Project1.pif

Win32/Bifrose.NKU also known as:

Bkav	W32.AIDetect.malware2
MicroWorld-eScan	Gen:Heur.VB.Krypt.13
ALYac	Gen:Heur.VB.Krypt.13
Cylance	Unsafe
Sangfor	[MICROSOFT VISUAL BASIC 5.0]
Alibaba	Worm:Win32/Bifrose.63eb9a50
Cybereason	malicious.f94349
Symantec	Trojan.Gen
Elastic	malicious (high confidence)
ESET-NOD32	a variant of Win32/Bifrose.NKU
APEX	Malicious
ClamAV	Win.Dropper.Poison-6823320-0
Kaspersky	Worm.Win32.WBNA.ipa
BitDefender	Gen:Heur.VB.Krypt.13
NANO-Antivirus	Trojan.Win32.VB.ursfc
Avast	Win32:Bifrose-EZJ [Trj]
Tencent	Win32.Trojan-dropper.Injector.Peqh
Ad-Aware	Gen:Heur.VB.Krypt.13
Sophos	ML/PE-A + Mal/VBCheMan-A
Comodo	TrojWare.Win32.VB.GE@4pqh5b
McAfee-GW-Edition	BehavesLike.Win32.Trojan.fz
FireEye	Generic.mg.43ff75df94349531
Emsisoft	Gen:Heur.VB.Krypt.13 (B)
SentinelOne	Static AI – Malicious PE
GData	Gen:Heur.VB.Krypt.13
Webroot	W32.Malware.Gen
Avira	TR/Dropper.Gen
MAX	malware (ai score=98)
Antiy-AVL	Trojan/Generic.ASBOL.5
Kingsoft	Win32.Troj.Generic.(kcloud)
Arcabit	Trojan.VB.Krypt.13
ZoneAlarm	Worm.Win32.WBNA.ipa
Microsoft	Trojan:Win32/Wacatac.B!ml
Cynet	Malicious (score: 100)
McAfee	Generic VB.fl
VBA32	Malware-Cryptor.VB.gen.7
Rising	Dropper.Injector!8.DC (CLOUD)
Ikarus	Trojan.Win32.Scar
Fortinet	W32/Bifrose.NKY!tr
BitDefenderTheta	AI:Packer.DA7179D320
AVG	Win32:Bifrose-EZJ [Trj]
Panda	Generic Malware
CrowdStrike	win/malicious_confidence_100% (W)

How to remove Win32/Bifrose.NKU?

Win32/Bifrose.NKU removal tool

Download and install GridinSoft Anti-Malware.
Open GridinSoft Anti-Malware and perform a “Standard scan“.
“Move to quarantine” all items.
Open “Tools” tab – Press “Reset Browser Settings“.
Select proper browser and options – Click “Reset”.
Restart your computer.

About the author

Paul Valéry

I'm a cyber security analyst and data science expert with 5+ years of experience with security software contractors.

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