Trojan

Trojan:Win32/Koutodoor.F (file analysis)

Malware Removal

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

  • Sample contains Overlay data
  • Uses Windows utilities for basic functionality
  • Drops a binary and executes it
  • Unconventionial language used in binary resources: Chinese (Simplified)
  • The binary likely contains encrypted or compressed data.
  • Authenticode signature is invalid
  • Attempts to modify proxy settings
  • Deletes executed files from disk

How to determine Trojan:Win32/Koutodoor.F?


File Info:

name: 0B97FDA53818A6D13F66.mlw
path: /opt/CAPEv2/storage/binaries/3fd972b3a46517fa305506ab8bf070c0e77c1ca3ebc38764f07cceb83e137732
crc32: C992E979
md5: 0b97fda53818a6d13f66df6ea59372d1
sha1: 70aa7fd6a7aabdb6a6ff0ed456f36b47fd0098a5
sha256: 3fd972b3a46517fa305506ab8bf070c0e77c1ca3ebc38764f07cceb83e137732
sha512: 16042e898fcbe251f74b712f9b6a5b1c2eeead9d667ff2b639473e72eb66a8c774c61a25158d25de0a0b9a94717cb034d7707749bec0c24bd359d201bcfac680
ssdeep: 3072:rdhq0M4JN28uJoUxYM9RcnMo9lfZvnaZI2+cngZbhwA+BC3K5eq0:rS0j72daM9RgF9l5avdn2VK70
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T18F04D290FF40CE71F20E98B1645707A7E22AD41C6DB3E45283F0E616966C3A2F52EE57
sha3_384: 23dc1cc15e6689fd0cf4d4b0469cd040f95c06826ee8b38c5f5f7e3f278941c328654e0ded35c841c5575b1e396de01a
ep_bytes: 558bec6aff68c0304000680025400064
timestamp: 2010-10-16 11:51:29

Version Info:

0: [No Data]

Trojan:Win32/Koutodoor.F also known as:

BkavW32.AIDetectMalware
LionicTrojan.Win32.Koutodoor.lmCq
DrWebTrojan.DownLoader2.19347
MicroWorld-eScanGen:Variant.Koutodoor.10
FireEyeGeneric.mg.0b97fda53818a6d1
SkyhighBehavesLike.Win32.Generic.ch
ALYacGen:Variant.Koutodoor.10
MalwarebytesGeneric.Malware/Suspicious
ZillyaTrojan.Koutodoor.Win32.4416
SangforSuspicious.Win32.Save.ins
K7AntiVirusBackdoor ( 00356ed71 )
BitDefenderGen:Variant.Koutodoor.10
K7GWBackdoor ( 00356ed71 )
CrowdStrikewin/malicious_confidence_100% (W)
BitDefenderThetaAI:Packer.7496C4B81F
VirITTrojan.Win32.Rootkit-Pakes.AM
SymantecTrojan.Koutodoor
Elasticmalicious (high confidence)
ESET-NOD32a variant of Win32/Koutodoor.HC
APEXMalicious
ClamAVWin.Dropper.Agent-36201
KasperskyBackdoor.Win32.Koutodoor.aihc
AlibabaBackdoor:Win32/Koutodoor.7e95f134
NANO-AntivirusTrojan.Win32.RKDoor.evaszd
ViRobotBackdoor.Win32.Koutodoor.Gen.A
RisingTrojan.Win32.Fednu.asu (CLASSIC)
EmsisoftGen:Variant.Koutodoor.10 (B)
GoogleDetected
F-SecureTrojan.TR/Dropper.Gen
BaiduWin32.Rootkit.Koutodoor.a
VIPREGen:Variant.Koutodoor.10
TrendMicroTROJ_DLOADR.SMOM
Trapminemalicious.high.ml.score
SophosMal/Koutodoor-A
SentinelOneStatic AI – Malicious PE
GDataGen:Variant.Koutodoor.10
JiangminTrojan/Generic.axxg
Webroot
VaristW32/Dropper.AY.gen!Eldorado
AviraTR/Dropper.Gen
Antiy-AVLTrojan[Backdoor]/Win32.Koutodoor
KingsoftWin32.Troj.JunkcodeT.a.188672
XcitiumBackdoor.Win32.Koutodoor.HC@25irch
ArcabitTrojan.Koutodoor.10
ZoneAlarmBackdoor.Win32.Koutodoor.aihc
MicrosoftTrojan:Win32/Koutodoor.F
CynetMalicious (score: 100)
AhnLab-V3Dropper/Onlinegamehack2.Gen
Acronissuspicious
McAfeeKoutodoor.gen.m
MAXmalware (ai score=100)
DeepInstinctMALICIOUS
VBA32BScope.Backdoor.Koutodoor
Cylanceunsafe
PandaBck/Koutodoor.L
TrendMicro-HouseCallTROJ_DLOADR.SMOM
TencentTrojan.PSW.Win32.OnlineGame.d
IkarusTrojan.Rootkit.Pakes
MaxSecureBackdoor.Koutodoor.aihc
FortinetW32/Koutodoor.A!tr.bdr
AVGWin32:Caxnet [Trj]
AvastWin32:Caxnet [Trj]

How to remove Trojan:Win32/Koutodoor.F?

Trojan:Win32/Koutodoor.F removal tool
  • 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.

About the author

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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