Categories: Worm

Worm:Win32/Vobfus.YA removal

The Worm:Win32/Vobfus.YA 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.YA virus can do?

  • Behavioural detection: Executable code extraction – unpacking
  • Yara rule detections observed from a process memory dump/dropped files/CAPE
  • A file with an unusual extension was attempted to be loaded as a DLL.
  • Creates RWX memory
  • Possible date expiration check, exits too soon after checking local time
  • Dynamic (imported) function loading detected
  • Enumerates running processes
  • Reads data out of its own binary image
  • CAPE extracted potentially suspicious content
  • Drops a binary and executes it
  • The binary likely contains encrypted or compressed data.
  • Creates an autorun.inf file
  • Authenticode signature is invalid
  • Behavioural detection: Injection (Process Hollowing)
  • Executed a process and injected code into it, probably while unpacking
  • Behavioural detection: Injection (inter-process)
  • Created a process from a suspicious location
  • Installs itself for autorun at Windows startup
  • Creates a copy of itself
  • Attempts to disable Windows Auto Updates
  • Anomalous binary characteristics
  • Attempts to modify Explorer settings to prevent hidden files from being displayed

How to determine Worm:Win32/Vobfus.YA?


File Info:

name: AFFE489803869F90C762.mlwpath: /opt/CAPEv2/storage/binaries/ae38cd0b126dd7291f81d83d81d81daa5b91a3d206bfb77b6c11739a780d1569crc32: 2D5D1E19md5: affe489803869f90c7628ba3921a650asha1: 09e2a3c9691e79f8d4a811cb4b956ed294a89b15sha256: ae38cd0b126dd7291f81d83d81d81daa5b91a3d206bfb77b6c11739a780d1569sha512: 80521d7edc85aaf2df54b895c490d9eb3842af44d2d266fa0158434a9b51294d38eb7b32fdafff6c5980b6041fc878eb6bb4f9f30baadea9fcbf7a40cd1e930cssdeep: 3072:tgQq3GAAkj5LFr/JYuqJSLLBGKByfRC1t:w3GXG1FGzo/kay5Crtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T19CD39E29FA47C027E0115BF2569943D08BBDBD3329C3661BF7C566283AB31998491BF3sha3_384: 4fa68e00c5d79c5fcbc6685452a385dbb1caa342d6f3d9a8637738e3ce11a11632873be32c1486a028a0164c24b671e5ep_bytes: 68cc194000e8eeffffff000000000000timestamp: 2014-07-16 12:15:42

Version Info:

Translation: 0x0409 0x04b0

Worm:Win32/Vobfus.YA also known as:

Bkav W32.AIDetect.malware1
Lionic Worm.Win32.Vobfus.lPJK
tehtris Generic.Malware
MicroWorld-eScan Gen:Variant.Symmi.33043
FireEye Generic.mg.affe489803869f90
CAT-QuickHeal Trojan.Beebone.D
ALYac Gen:Variant.Symmi.33043
Cylance Unsafe
VIPRE Gen:Variant.Symmi.33043
Sangfor VISUAL BASIC4
K7AntiVirus Trojan ( 005042e71 )
K7GW Trojan ( 005042e71 )
Cybereason malicious.803869
Baidu Win32.Trojan.Inject.af
Cyren W32/Vobfus.OM.gen!Eldorado
Symantec W32.Changeup!gen46
Elastic malicious (high confidence)
ESET-NOD32 a variant of Win32/Injector.AZED
APEX Malicious
ClamAV Win.Malware.Vobfus-6907383-0
Kaspersky Worm.Win32.Vobfus.ertc
BitDefender Gen:Variant.Symmi.33043
NANO-Antivirus Trojan.Win32.Vobfus.dyhtkx
SUPERAntiSpyware Trojan.Agent/Gen-Rimecud
Avast Win32:VB-AHTQ [Trj]
Ad-Aware Gen:Variant.Symmi.33043
Emsisoft Gen:Variant.Symmi.33043 (B)
Comodo TrojWare.Win32.VB.ICOU@58gw6x
DrWeb Win32.HLLW.Autoruner2.9946
Zillya Worm.Vobfus.Win32.147972
McAfee-GW-Edition BehavesLike.Win32.PWSZbot.ch
Trapmine malicious.high.ml.score
Sophos ML/PE-A + Mal/VB-ALW
SentinelOne Static AI – Malicious PE
GData Gen:Variant.Symmi.33043
Avira TR/Badur.gyzq
Antiy-AVL Trojan/Generic.ASMalwS.488
Arcabit Trojan.Symmi.D8113
ZoneAlarm Worm.Win32.Vobfus.ertc
Microsoft Worm:Win32/Vobfus.YA
Cynet Malicious (score: 100)
McAfee W32/Worm-AAEH.f!AFFE48980386
MAX malware (ai score=89)
VBA32 TScope.Trojan.VB
Rising Trojan.Win32.Generic.169FFECC (C64:YzY0Okk6Ih4yjfUx)
Yandex Worm.Vobfus!6MRPc/MdYwg
Ikarus Worm.Win32.Vobfus
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/VBInjector.W!tr
BitDefenderTheta Gen:NN.ZevbaF.34582.im0@a4@PcMji
AVG Win32:VB-AHTQ [Trj]
Panda W32/Vobfus.GEP.worm
CrowdStrike win/malicious_confidence_100% (W)

How to remove Worm:Win32/Vobfus.YA?

  • 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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Paul Valéry

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