Categories: Malware

Symmi.4923 (B) removal tips

The Symmi.4923 (B) 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 Symmi.4923 (B) 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)
  • Attempts to disable Windows Auto Updates
  • Anomalous binary characteristics
  • Attempts to modify Explorer settings to prevent hidden files from being displayed
  • Yara rule detections observed from a process memory dump/dropped files/CAPE

How to determine Symmi.4923 (B)?


File Info:

name: C94FF95AE97CA8B357A2.mlwpath: /opt/CAPEv2/storage/binaries/a7efbeaab2b551a5344a1764c73d376b29fc4a0711eea37e36cb504e943a38bdcrc32: 3A13A434md5: c94ff95ae97ca8b357a230a0245854casha1: 1d7b64f35c2b9cec65d8ce5f8ef1bc80f66179c1sha256: a7efbeaab2b551a5344a1764c73d376b29fc4a0711eea37e36cb504e943a38bdsha512: 44aa3643207275edeee5f9c4309b1dd759bf75c684bde1813bfeee2dba497150965cd391f0a7807b11170f00c6dbd9d9bc550edd418c2b5ede4bc9775c8711bcssdeep: 768:vAU68qOJ+TtW4vwHpFeh6gM1rA8dOsc7jUq4RkA5o3K1DfsvtzsXjLft+9o1mm:vAUHqlZWhLFjnAzA5o6BfItoXjLl0hmtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T10F93C63FBB169881E55CA27416F6CBF516FB7C57270B100BA74037AA28E6E041DACD93sha3_384: f2daa210d3c6d463705deac99aaebf2c8b124e745943606ebf523717379c05ff6ec9b2773cb499fa115c6707f1e0c696ep_bytes: 6828124000e8f0ffffff000000000000timestamp: 2012-09-14 05:23:58

Version Info:

Translation: 0x0409 0x04b0ProductName: acoponFileVersion: 2.69ProductVersion: 2.69InternalName: topsailiteOriginalFilename: topsailite.exe

Symmi.4923 (B) also known as:

Bkav W32.AIDetectMalware
Lionic Worm.Win32.Vobfus.tsjm
tehtris Generic.Malware
MicroWorld-eScan Gen:Variant.Symmi.4923
ClamAV Win.Trojan.Changeup-6169544-0
FireEye Generic.mg.c94ff95ae97ca8b3
CAT-QuickHeal Trojan.Beebone.D
ALYac Gen:Variant.Symmi.4923
Malwarebytes Pronny.Worm.Spreader.DDS
VIPRE Gen:Variant.Symmi.4923
Sangfor Suspicious.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Malware:Win32/km_2f92.None
K7GW EmailWorm ( 0054d10f1 )
K7AntiVirus EmailWorm ( 0054d10f1 )
VirIT Worm.Win32.X-Autorun.BMDK
Cyren W32/Vobfus.AT.gen!Eldorado
Symantec W32.Changeup!gen20
Elastic malicious (high confidence)
ESET-NOD32 a variant of Win32/Pronny.BJ
APEX Malicious
Cynet Malicious (score: 100)
Kaspersky Worm.Win32.Vobfus.dhlj
BitDefender Gen:Variant.Symmi.4923
NANO-Antivirus Trojan.Win32.Autoruner1.jvjuka
SUPERAntiSpyware Trojan.Agent/Gen-Vobfus
Avast Win32:VB-AEMB [Trj]
Tencent Worm.Win32.Vobfus.ha
TACHYON Trojan/W32.Agent.90112
Sophos Mal/BeeBone-AE
F-Secure Trojan.TR/Dropper.Gen
DrWeb Win32.HLLW.Autoruner1.25776
TrendMicro WORM_VOBFUS.SM02
McAfee-GW-Edition BehavesLike.Win32.VBObfus.mm
Trapmine malicious.high.ml.score
Emsisoft Gen:Variant.Symmi.4923 (B)
SentinelOne Static AI – Malicious PE
GData Gen:Variant.Symmi.4923
Jiangmin Trojan/Vbobf.b
Webroot W32.Trojan.Agent.Gen
Avira TR/Dropper.Gen
Antiy-AVL Worm/Win32.WBNA.gen
Xcitium TrojWare.Win32.Pronny.EB@4qtzpj
Arcabit Trojan.Symmi.D133B
ZoneAlarm Worm.Win32.Vobfus.dhlj
Microsoft Worm:Win32/Vobfus.HU
Google Detected
AhnLab-V3 Trojan/Win32.Menti.R36560
McAfee GenDownloader.rv
MAX malware (ai score=80)
VBA32 Trojan.Agent
Cylance unsafe
Panda Trj/Genetic.gen
TrendMicro-HouseCall WORM_VOBFUS.SM02
Rising Trojan.VB!1.99F7 (CLASSIC)
Yandex Trojan.GenAsa!6+Gc6qr5vwQ
Ikarus Trojan.Win32.Agent
MaxSecure Trojan.Malware.5486835.susgen
Fortinet W32/Diple.EJQE!tr
BitDefenderTheta Gen:NN.ZevbaF.36250.fm0@a0r3F3pi
AVG Win32:VB-AEMB [Trj]
Cybereason malicious.ae97ca
DeepInstinct MALICIOUS

How to remove Symmi.4923 (B)?

  • 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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