Categories: Trojan

About “Trojan:Win32/Koutodoor.A” infection

The Trojan:Win32/Koutodoor.A 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 Trojan:Win32/Koutodoor.A virus can do?

  • The binary contains an unknown PE section name indicative of packing
  • The binary likely contains encrypted or compressed data.
  • The executable is compressed using UPX
  • Authenticode signature is invalid

How to determine Trojan:Win32/Koutodoor.A?


File Info:

name: C73D66E5BF656FD93CC6.mlwpath: /opt/CAPEv2/storage/binaries/63ec307cef119ac5b36faaf22a581c3c288af01b96e7f9281c5c262fbe4e8221crc32: 6E71FA38md5: c73d66e5bf656fd93cc6c63d9978dba0sha1: 5251554b4adaba763098a4d397ee61567102941bsha256: 63ec307cef119ac5b36faaf22a581c3c288af01b96e7f9281c5c262fbe4e8221sha512: 2d2459ba11f64ce7964cc2aedc24b73c9de808d3452be09c8ab7d4f082e286acd9cdbf394a88006987479a9c863c3f139149ef93d49cafc8192418547984df7fssdeep: 1536:KpUxkhRn9Qs5kogEqSRx6Cnvbh9uLEkLae2nwml7UfodLS3MhtU9dm:3WhRes5kogEqSRx6Cv1pHxVDLSktUmtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1FEB39E027145C376EAEAA330669F2F33797F19210D8398CBDBD3C5A719C5A94B1AD203sha3_384: 6415cb1ab5529a6bca6e6677d71215961efb42ba75bc23a10a3178895b222100a4d5a628dfc51551c199b74ed7a24b4dep_bytes: 558bec6aff685051400068404a400064timestamp: 2009-03-08 11:01:19

Version Info:

0: [No Data]

Trojan:Win32/Koutodoor.A also known as:

Bkav W32.AIDetectMalware
Lionic Trojan.Win32.Agent.Y!c
Elastic malicious (moderate confidence)
MicroWorld-eScan Gen:Variant.Lazy.208374
ALYac Gen:Variant.Lazy.208374
Malwarebytes Malware.AI.3301539476
Zillya Trojan.Agent.Win32.3428362
Sangfor Trojan.Win32.Save.a
K7AntiVirus Trojan ( 004bcce41 )
Alibaba Trojan:Win32/Koutodoor.18b71868
K7GW Trojan ( 004bcce41 )
Cybereason malicious.5bf656
Baidu Win32.Rootkit.Koutodoor.a
Cyren W32/Koutodoor.S.gen!Eldorado
Symantec Packed.Generic.199
ESET-NOD32 multiple detections
APEX Malicious
Cynet Malicious (score: 100)
Kaspersky Rootkit.Win32.Agent.bkwi
BitDefender Gen:Variant.Lazy.208374
NANO-Antivirus Trojan.Win32.Agent.cawbk
Avast Win32:Koutodoor [Rtk]
Tencent Win32.Rootkit.Agent.Pgil
Emsisoft Gen:Variant.Lazy.208374 (B)
F-Secure Trojan.TR/Crypt.ZPACK.Gen
DrWeb Trojan.DownLoad.35045
VIPRE Gen:Variant.Lazy.208374
TrendMicro TROJ_KTODOOR.SMF
McAfee-GW-Edition BehavesLike.Win32.Generic.cm
Trapmine malicious.high.ml.score
FireEye Generic.mg.c73d66e5bf656fd9
Sophos Mal/Generic-S
Ikarus Trojan-Downloader.Win32.RtkDL
GData Gen:Variant.Lazy.208374
Jiangmin Trojan/JunkCode.Gen
Webroot Trojan:Win32/Koutodoor.A
Avira TR/Crypt.ZPACK.Gen
Antiy-AVL Trojan/Win32.SGeneric
Xcitium TrojWare.Win32.TrojanDownloader.BHO.~BK@f80qx
Arcabit Trojan.Lazy.D32DF6
ZoneAlarm Rootkit.Win32.Agent.bkwi
Microsoft Trojan:Win32/Koutodoor.A
Google Detected
AhnLab-V3 Trojan/Win32.Hmir.R2706
Acronis suspicious
McAfee generic!bg.ftt
MAX malware (ai score=99)
VBA32 TScope.Malware-Cryptor.SB
Cylance unsafe
Panda Trj/CI.A
TrendMicro-HouseCall TROJ_KTODOOR.SMF
Rising Trojan.Koutodoor!1.67FB (CLASSIC)
SentinelOne Static AI – Malicious PE
MaxSecure Trojan.Malware.575954.susgen
Fortinet W32/Generic_bg.HCE!tr
BitDefenderTheta Gen:NN.ZexaF.36196.hmW@ayqCG4n
AVG Win32:Koutodoor [Rtk]
DeepInstinct MALICIOUS
CrowdStrike win/malicious_confidence_100% (W)

How to remove Trojan:Win32/Koutodoor.A?

  • 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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