Categories: Malware

What is “Win32:VB-NSF [Wrm]”?

The Win32:VB-NSF [Wrm] 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.

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What Win32:VB-NSF [Wrm] virus can do?

  • Behavioural detection: Executable code extraction – unpacking
  • Sample contains Overlay data
  • Reads data out of its own binary image
  • CAPE extracted potentially suspicious content
  • Drops a binary and executes it
  • Authenticode signature is invalid
  • Behavioural detection: Injection (inter-process)
  • CAPE detected the embedded win api malware family
  • Anomalous binary characteristics
  • Attempts to modify Explorer settings to prevent hidden files from being displayed
  • Yara detections observed in process dumps, payloads or dropped files

How to determine Win32:VB-NSF [Wrm]?


File Info:

name: 31F768A29184A6F8591F.mlwpath: /opt/CAPEv2/storage/binaries/6930b70cb13681728ce43e344bbbed0ce6f260e2cd04f675a755fa37be8427adcrc32: 06EBDABFmd5: 31f768a29184a6f8591f981325c1d648sha1: 8b8d4e3f7d82b49bb4d7687393c2b569f379be39sha256: 6930b70cb13681728ce43e344bbbed0ce6f260e2cd04f675a755fa37be8427adsha512: bd670cc93caa049ddc8229dca2377ddabb0c7262ae3b0b97d6a6ebcaf3cf58c12304c242dcd8d361b97d7ffb1cc6c7bbfd7ded382dc86adc3722393047cebd05ssdeep: 768:o4Ha5MdAarqVD1J1twDd/v/jdISproC6RHwibw5/Fzp7x:oFtYqVD/HwDR3jRoC6RHOp7xtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1353371AF7AC75646E90C2339B1AFCAC46213F8D93E071243B05D277EB862D615E17227sha3_384: 38e1c93756fa778bc2cba186dd0ec625884ae975ab9ca3dccd9f9e552f8a652d74ee926729060a2043a3ad902f4e8857ep_bytes: 68d4124000e8eeffffff000000000000timestamp: 2009-12-20 10:49:14

Version Info:

Translation: 0x0409 0x04b0CompanyName: xrrAwOKhProductName: xrrAwOKhFileVersion: 1.36ProductVersion: 1.36InternalName: xrrAwOKhOriginalFilename: xrrAwOKh.exe

Win32:VB-NSF [Wrm] also known as:

Bkav W32.AIDetectMalware
AVG Win32:VB-NSF [Wrm]
tehtris Generic.Malware
MicroWorld-eScan Gen:Trojan.Chinky.2
CAT-QuickHeal Trojan.Vobfus.gen
Skyhigh BehavesLike.Win32.VBObfus.qm
McAfee VBObfus
Malwarebytes Generic.Malware.AI.DDS
VIPRE Gen:Trojan.Chinky.2
Sangfor Suspicious.Win32.Save.vb
K7AntiVirus NetWorm ( 700000151 )
K7GW NetWorm ( 700000151 )
CrowdStrike win/malicious_confidence_100% (D)
Baidu Win32.Worm.Autorun.z
VirIT Worm.Win32.VBNA.KQQ
Symantec ML.Attribute.HighConfidence
Elastic malicious (high confidence)
ESET-NOD32 Win32/AutoRun.VB.IQ
Cynet Malicious (score: 100)
APEX Malicious
Kaspersky Worm.Win32.VBNA.brbj
BitDefender Gen:Trojan.Chinky.2
NANO-Antivirus Trojan.Win32.Dorifel.dzktnv
SUPERAntiSpyware Trojan.Agent/Gen-Vbcop
Avast Win32:VB-NSF [Wrm]
Rising Trojan.Autorun!1.DA78 (CLASSIC)
Emsisoft Gen:Trojan.Chinky.2 (B)
F-Secure Worm.WORM/Vobfus.F
DrWeb Trojan.Siggen.38892
Zillya Worm.VBNAGen.Win32.2
TrendMicro WORM_VBNA.SM
FireEye Generic.mg.31f768a29184a6f8
Sophos Mal/SillyFDC-D
SentinelOne Static AI – Malicious PE
Jiangmin Worm/VBNA.hgwh
Varist W32/Vobfus.D.gen!Eldorado
Avira WORM/Vobfus.F
MAX malware (ai score=86)
Antiy-AVL Trojan/Win32.VB
Microsoft Worm:Win32/Vobfus.AC
Xcitium Worm.Win32.Vobfus.F0@1n9m6y
Arcabit Trojan.Chinky.2
ZoneAlarm Worm.Win32.VBNA.brbj
GData Gen:Trojan.Chinky.2
Google Detected
AhnLab-V3 Win32/Vbna4.worm.Gen
Acronis suspicious
VBA32 TScope.Trojan.VB
ALYac Gen:Trojan.Chinky.2
Cylance unsafe
Panda W32/Vobfus.CP.worm
TrendMicro-HouseCall WORM_VBNA.SM
Tencent Worm.Win32.Vbna.zb
Yandex Trojan.GenAsa!JVveEt5lA3E
Ikarus Worm.Win32.Vobfus
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/VBObfus.BDBD!tr
BitDefenderTheta AI:Packer.5C3BF62A20
Cybereason malicious.29184a
DeepInstinct MALICIOUS
alibabacloud Worm:Win/Vobfus.544299ea

How to remove Win32:VB-NSF [Wrm]?

  • 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.
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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