Worm

Worm.Win32.Vobfus.efir (file analysis)

Malware Removal

The Worm.Win32.Vobfus.efir 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 Worm.Win32.Vobfus.efir virus can do?

  • Behavioural detection: Executable code extraction – unpacking
  • 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 pe malware family
  • Attempts to disable Windows Auto Updates
  • 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 Worm.Win32.Vobfus.efir?


File Info:

name: F91A3F4E34E7FF48ED6B.mlw
path: /opt/CAPEv2/storage/binaries/176a267b3ee08fdd95bfce4feabc52cc3888d381f46464bc212353f4cf1adb60
crc32: 31725762
md5: f91a3f4e34e7ff48ed6bdd9c45b13406
sha1: b08cbbc6e732d8a667b321f48fda715c819f736b
sha256: 176a267b3ee08fdd95bfce4feabc52cc3888d381f46464bc212353f4cf1adb60
sha512: c888955e0afd71d4bcffa735064d3cd5aef2d9131c154057c3db26c3e0651e76b884cefa6d1a6c0c5ad716868f082d4468892e890af2bc98f90594bfbd73f9dc
ssdeep: 3072:9sg/rTiooHiUS41IGymUU5fkUehyB456JnLw6BoiEx4PvsL2o5n33ygoe:CAToHiUBiGyuT236JndeiEx4PvRo53Fv
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T18C44811972C0F77ED821C6F43A5643A4A53EED322491A807F6D21F1A37B5E87E261363
sha3_384: 69fde4512bdc58103084570529598b7d076b934f506854793354499dd9bf8a64834bb5261baa3651658e02a221777b91
ep_bytes: 6810404000e8f0ffffff000000000000
timestamp: 1998-03-15 16:33:28

Version Info:

0: [No Data]

Worm.Win32.Vobfus.efir also known as:

BkavW32.AIDetectMalware
Elasticmalicious (high confidence)
MicroWorld-eScanGen:Variant.Sirefef.942
FireEyeGeneric.mg.f91a3f4e34e7ff48
CAT-QuickHealTrojan.Beebone.D
SkyhighBehavesLike.Win32.VBObfus.dm
McAfeeVBObfus.eq
MalwarebytesGeneric.Malware.AI.DDS
SangforSuspicious.Win32.Save.vb
K7AntiVirusEmailWorm ( 0054d10f1 )
K7GWEmailWorm ( 0054d10f1 )
CrowdStrikewin/malicious_confidence_100% (W)
BitDefenderThetaGen:NN.ZevbaF.36802.qmW@aq5dESbi
VirITTrojan.Win32.Zyx.HH
SymantecW32.Changeup!gen15
ESET-NOD32a variant of Win32/AutoRun.VB.AQN
CynetMalicious (score: 100)
APEXMalicious
ClamAVWin.Trojan.Vobfus-70360
KasperskyWorm.Win32.Vobfus.efir
BitDefenderGen:Variant.Sirefef.942
NANO-AntivirusTrojan.Win32.Otran.jwdzws
SUPERAntiSpywareTrojan.Agent/Gen-Multi[VB]
AvastWin32:VB-AASQ [Trj]
TencentWorm.Win32.Vobfus.kh
TACHYONWorm/W32.Vobfus.266240
EmsisoftGen:Variant.Sirefef.942 (B)
BaiduWin32.Trojan.VBObfus.f
F-SecureTrojan.TR/Otran.aymb
DrWebWorm.Siggen.8271
VIPREGen:Variant.Sirefef.942
TrendMicroWORM_VOBFUS.SM10
Trapminemalicious.high.ml.score
SophosMal/SillyFDC-U
IkarusWorm.Win32.Vobfus
GDataGen:Variant.Sirefef.942
AviraTR/Otran.aymb
Antiy-AVLWorm/Win32.WBNA.gen
Kingsoftmalware.kb.a.1000
XcitiumTrojWare.Win32.Diple.EMIB@4pez3w
ArcabitTrojan.Sirefef.942
ViRobotTrojan.Win32.A.Vobfus.266240
ZoneAlarmWorm.Win32.Vobfus.efir
MicrosoftWorm:Win32/Vobfus!pz
VaristW32/Vobfus.BE.gen!Eldorado
AhnLab-V3Trojan/Win32.Diple.R44447
Acronissuspicious
VBA32BScope.Trojan-Dropper.Injector
ALYacGen:Variant.Sirefef.942
MAXmalware (ai score=89)
Cylanceunsafe
PandaW32/Vobfus.GEW.worm
TrendMicro-HouseCallWORM_VOBFUS.SM10
RisingWorm.VobfusEx!1.99DB (CLASSIC)
YandexTrojan.GenAsa!SaCOTwa1z30
SentinelOneStatic AI – Malicious PE
FortinetW32/Diple.EJQE!tr
AVGWin32:VB-AASQ [Trj]
Cybereasonmalicious.e34e7f
DeepInstinctMALICIOUS
alibabacloudTrojan:Win/Vobfus.8cc5bd08

How to remove Worm.Win32.Vobfus.efir?

Worm.Win32.Vobfus.efir 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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