Categories: Malware

What is “Win32/AutoRun.VB.ASA”?

The Win32/AutoRun.VB.ASA 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/AutoRun.VB.ASA 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
  • The binary contains an unknown PE section name indicative of packing
  • Authenticode signature is invalid
  • Behavioural detection: Injection (inter-process)
  • CAPE detected the embedded win api 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 Win32/AutoRun.VB.ASA?


File Info:

name: AB0BEA7EDD202FFF3C07.mlwpath: /opt/CAPEv2/storage/binaries/b5c056908eb1fb21d6867efbb895025c9a3f35e04efe260030a72e1ec820e7afcrc32: 4CD34A59md5: ab0bea7edd202fff3c072d71515fa7e1sha1: 4b2a93eaa229e36f5f7202804784609173ac6282sha256: b5c056908eb1fb21d6867efbb895025c9a3f35e04efe260030a72e1ec820e7afsha512: e5f97924a22dc4731080c437d1a62125425fabbefd446ab10dbdb22eed92f79fa9e60cac0041fb43a52b23d6707f48105248564b9cd349094f14fbc8d12e53d1ssdeep: 3072:HrAcUx7LaIsWvZ0OgRqTAJcLGGO/xuiEyJeOOeGs5oxnkNzQKcjFL:HrMFx/ZLA4PmG6dItype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1B544B52DB390E33EF061C7F9299943A4406DBD3615E9A41BF7C21B2936F09E39260B53sha3_384: 130f6688828d3c8ba452280e66c1213cf20008d6e8c07f67af6ec15e26df9770216c6d1ef327c0c13f687d6b9c254cadep_bytes: 6818524000e8eeffffff000000000000timestamp: 2000-02-22 11:34:21

Version Info:

Translation: 0x0409 0x04b0ProductName: ZSkZTvQuGFileVersion: 1.00ProductVersion: 1.00InternalName: KBFDnZGbUkOriginalFilename: KBFDnZGbUk.exe

Win32/AutoRun.VB.ASA also known as:

Bkav W32.AIDetectMalware
Lionic Worm.Win32.WBNA.low6
tehtris Generic.Malware
MicroWorld-eScan Gen:Variant.Barys.2490
FireEye Generic.mg.ab0bea7edd202fff
CAT-QuickHeal Trojan.Beebone.D
Skyhigh BehavesLike.Win32.VBObfus.dm
McAfee VBObfus.cu
Malwarebytes Generic.Malware.AI.DDS
Sangfor Suspicious.Win32.Save.vb
CrowdStrike win/malicious_confidence_100% (D)
K7GW EmailWorm ( 0054d10f1 )
K7AntiVirus EmailWorm ( 0054d10f1 )
BitDefenderTheta Gen:NN.ZevbaF.36744.qq1@aiHmfvmi
VirIT Trojan.Win32.Zyx.HU
Symantec W32.Changeup
Elastic malicious (high confidence)
ESET-NOD32 Win32/AutoRun.VB.ASA
APEX Malicious
ClamAV Win.Trojan.Vobfus-22
Kaspersky Worm.Win32.Vobfus.dgmc
BitDefender Gen:Variant.Barys.2490
NANO-Antivirus Trojan.Win32.VBKrypt.cinarp
Avast Win32:Regrun-LY [Trj]
Tencent Worm.Win32.Vobfus.kak
Emsisoft Gen:Variant.Barys.2490 (B)
Baidu Win32.Worm.Pronny.d
F-Secure Worm.WORM/Vobfus.aqrtd
DrWeb Trojan.VbCrypt.81
VIPRE Gen:Variant.Barys.2490
TrendMicro WORM_VOBFUS.SMAB
Trapmine malicious.high.ml.score
Sophos Mal/VBCheMan-B
Ikarus Trojan.Win32.Vobfus
GData Gen:Variant.Barys.2490
Google Detected
Avira WORM/Vobfus.aqrtd
Varist W32/Vobfus.Z.gen!Eldorado
Antiy-AVL Virus/Win64.Expiro.rsrc
Kingsoft malware.kb.a.1000
Gridinsoft Worm.Win32.Autorun.sa
Xcitium Worm.Win32.VB.AB@4pji3v
Arcabit Trojan.Barys.D9BA
ZoneAlarm Worm.Win32.Vobfus.dgmc
Microsoft Worm:Win32/Vobfus
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.VBKrypt.R22447
Acronis suspicious
VBA32 BScope.Trojan.VB.Diple.01583
ALYac Gen:Variant.Barys.2490
MAX malware (ai score=84)
Cylance unsafe
Panda W32/Vobfus.GEW.worm
Zoner Trojan.Win32.6610
TrendMicro-HouseCall WORM_VOBFUS.SMAB
Rising Worm.VobfusEx!1.99DB (CLASSIC)
Yandex Trojan.GenAsa!2B6wK8yPm5k
SentinelOne Static AI – Malicious PE
Fortinet W32/CoinMiner.F
AVG Win32:Regrun-LY [Trj]
Cybereason malicious.aa229e
DeepInstinct MALICIOUS

How to remove Win32/AutoRun.VB.ASA?

  • 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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