Categories: Malware

About “Symmi.83131” infection

The Symmi.83131 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.83131 virus can do?

  • Behavioural detection: Executable code extraction – unpacking
  • SetUnhandledExceptionFilter detected (possible anti-debug)
  • Yara rule detections observed from a process memory dump/dropped files/CAPE
  • Creates RWX memory
  • Possible date expiration check, exits too soon after checking local time
  • Dynamic (imported) function loading detected
  • A process created a hidden window
  • CAPE extracted potentially suspicious content
  • Unconventionial language used in binary resources: Arabic (Egypt)
  • The binary contains an unknown PE section name indicative of packing
  • Authenticode signature is invalid
  • Uses Windows utilities for basic functionality
  • Deletes its original binary from disk
  • Behavioural detection: Injection (inter-process)
  • CAPE detected the Formbook malware family
  • Anomalous binary characteristics
  • Uses suspicious command line tools or Windows utilities

How to determine Symmi.83131?


File Info:

name: DEB3CA6A5D55410BBC23.mlwpath: /opt/CAPEv2/storage/binaries/94368c02431a619ceca1c29002879f5a7ea17c8c4f81025e3c18ae697f5fba2bcrc32: 85A4707Dmd5: deb3ca6a5d55410bbc23a562c9f7ee5dsha1: cd9f8fa90e93486bfb7a5ee948620e4abb63f127sha256: 94368c02431a619ceca1c29002879f5a7ea17c8c4f81025e3c18ae697f5fba2bsha512: f9388df916353a28a63daf3db9c8799847c2184a3a739ab9d207e28142048d377d80fcb1d1302df2096c892686fdd53e920cf3632b289a551d6e3f352c6da166ssdeep: 24576:cck6VkEyZF3QaeqCwX30ukIa4v+NY7ZYNdYMqWQ7:cBTyCoOtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T102255B12A2BC9CF2F06D3DB58C0787AC5815BD106D34558AE6EB3DCCEA77583E42A2D1sha3_384: 6974b8f862f723582dfee32d4cc478900705dfb352a86c9ab9e2dc74e4ec11f8ae3d001be127296016f901f9631d2220ep_bytes: 558bec83c4f0b8183b4600e8c024fafftimestamp: 1992-06-19 22:22:17

Version Info:

CompanyName: Heaventools SoftwareFileDescription: PE ExplorerFileVersion: 1.99.6.1400InternalName: PE ExplorerLegalCopyright: Copyright © 2000-2009 Heaventools SoftwareLegalTrademarks: PE Explorer is a trademark of Heaventools SoftwareOriginalFilename: pexplorer.exeProductName: PE ExplorerProductVersion: 1.99.6.1400Comments: Translation: 0x0000 0x04e3

Symmi.83131 also known as:

Elastic malicious (high confidence)
Cynet Malicious (score: 100)
FireEye Generic.mg.deb3ca6a5d55410b
CAT-QuickHeal Trojan.Agent
ALYac Gen:Variant.Symmi.83131
Cylance Unsafe
Zillya Trojan.Agent.Win32.960020
Sangfor Trojan.Win32.Save.a
K7AntiVirus Trojan ( 0053a6ac1 )
Alibaba Trojan:Win32/Injector.956e8a64
K7GW Trojan ( 0053a6ac1 )
CrowdStrike win/malicious_confidence_100% (W)
Symantec Trojan Horse
ESET-NOD32 a variant of Win32/Injector.DZUJ
APEX Malicious
Paloalto generic.ml
ClamAV Win.Malware.Score-7597125-0
Kaspersky HEUR:Trojan.Win32.Agent.gen
BitDefender Gen:Variant.Symmi.83131
MicroWorld-eScan Gen:Variant.Symmi.83131
Avast Win32:Trojan-gen
Tencent Malware.Win32.Gencirc.114d211e
Ad-Aware Gen:Variant.Symmi.83131
Emsisoft Gen:Variant.Symmi.83131 (B)
DrWeb Trojan.Inject1.54688
TrendMicro TSPY_HPLOKI.SM1
McAfee-GW-Edition BehavesLike.Win32.Infected.dh
Sophos ML/PE-A + Mal/Agent-ATI
Ikarus Trojan.Crypt
GData Gen:Variant.Symmi.83131
Avira TR/ATRAPS.Gen
Antiy-AVL Trojan/Win32.Agent
Arcabit Trojan.Symmi.D144BB
ViRobot Trojan.Win32.Z.Agent.977920.W
Microsoft Trojan:Win32/Sabsik.FL.B!ml
AhnLab-V3 Spyware/Win32.Hploki.C2689463
McAfee RDN/Generic PWS.y
MAX malware (ai score=86)
VBA32 Trojan.Agent
Malwarebytes Trojan.Agent
TrendMicro-HouseCall TSPY_HPLOKI.SM1
Yandex Trojan.GenAsa!FxtGGI6vOKE
SentinelOne Static AI – Suspicious PE
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/GenKryptik.EKLE!tr
BitDefenderTheta Gen:NN.ZelphiF.34084.7K0@a0gmTFlQ
AVG Win32:Trojan-gen
Panda Trj/GdSda.A

How to remove Symmi.83131?

  • 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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