Backdoor

Backdoor.Fynloski.S removal instruction

Malware Removal

The Backdoor.Fynloski.S 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 Backdoor.Fynloski.S virus can do?

  • Reads data out of its own binary image
  • CAPE extracted potentially suspicious content
  • 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
  • Behavioural detection: Injection (Process Hollowing)
  • Behavioural detection: Injection (inter-process)
  • CAPE detected the DarkComet malware family
  • Checks the CPU name from registry, possibly for anti-virtualization
  • Interacts with known DarkComet registry keys
  • Harvests cookies for information gathering
  • Creates known Fynloski/DarkComet mutexes
  • Collects information to fingerprint the system
  • Yara rule detections observed from a process memory dump/dropped files/CAPE

How to determine Backdoor.Fynloski.S?


File Info:

name: 2BE5A09D6C399DF8DE30.mlw
path: /opt/CAPEv2/storage/binaries/55f91b2a2cf95716bf751254fa74a2d89f2ae4227a0af140ec19df7e37ae9e16
crc32: 5859083C
md5: 2be5a09d6c399df8de305c5b90bf4a5c
sha1: 07071de7e900ccacda36de5b5a606ae31e62e29a
sha256: 55f91b2a2cf95716bf751254fa74a2d89f2ae4227a0af140ec19df7e37ae9e16
sha512: 92fd3802c8ef94223573497722b6c5cf33e7dfdb17097675479dfca6656f36572628940369b9b7cdf5c1d3ac9ae996967b76f719ebedf18a1ccd9d8148ce2107
ssdeep: 6144:z1iJcYtR1HsvpSHY7KoSrfTNBuzZZcA1wnOLrMM4HIXLLwMdWnpQZh9h4:zkHcpSHY7VSrfT2/czO3H+IgMd0QZh9u
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T17A74F1E2BAD4AF21C11038FAAD3195E546692C9A4E10C7037678BB0F7D724D3DFA261D
sha3_384: e223f453d3819a59fcc8e9938a1febdd039f731a267ab088e9b9409424f96272ee7a0517846a34d9ecad248b4ac5b9f0
ep_bytes: 60be00701d138dbe00a0f6ff5783cdff
timestamp: 2011-04-25 20:25:55

Version Info:

0: [No Data]

Backdoor.Fynloski.S also known as:

BkavW32.AIDetectMalware
LionicTrojan.Win32.Agent.m!c
Elasticmalicious (moderate confidence)
CynetMalicious (score: 100)
CAT-QuickHealBackdoor.Fynloski.A9
McAfeeGenericRXAA-AA!2BE5A09D6C39
Cylanceunsafe
ZillyaBackdoor.Agent.Win32.69928
SangforVirus.Win32.Save.a
CrowdStrikewin/malicious_confidence_100% (W)
K7GWTrojan ( 7000000f1 )
K7AntiVirusTrojan ( 7000000f1 )
BaiduWin32.Backdoor.Agent.l
VirITTrojan.Win32.Delf.XZH
CyrenW32/Downloader.C.gen!Eldorado
SymantecBackdoor.Krademok
tehtrisGeneric.Malware
ESET-NOD32Win32/Delf.OAZ
APEXMalicious
ClamAVWin.Trojan.Darkkomet-6964354-1
KasperskyBackdoor.Win32.Agent.bjev
BitDefenderBackdoor.Fynloski.S
NANO-AntivirusTrojan.Win32.DarkKomet.wcwjb
SUPERAntiSpywareHeur.Agent/Gen-FakeChrome
MicroWorld-eScanBackdoor.Fynloski.S
AvastWin32:Trojan-gen
TencentWin32.Backdoor.Agent.Vwhl
TACHYONTrojan/W32.DP-Pincav.774144
EmsisoftBackdoor.Fynloski.S (B)
F-SecureBackdoor.BDS/Backdoor.Gen
DrWebBackDoor.Comet.21
VIPREBackdoor.Fynloski.S
TrendMicroBKDR_FYNLOS.SMIA
McAfee-GW-EditionBehavesLike.Win32.Dropper.fc
Trapminemalicious.moderate.ml.score
FireEyeGeneric.mg.2be5a09d6c399df8
SophosMal/DelfInj-A
SentinelOneStatic AI – Malicious PE
JiangminBackdoor/Agent.cura
WebrootW32.Backdoor.Agent
AviraBDS/Backdoor.Gen
Antiy-AVLTrojan/Win32.Siscos
MicrosoftTrojan:Win32/Wacatac.B!ml
XcitiumMalware@#2qw5uue56d3rz
ArcabitBackdoor.Fynloski.S
ViRobotBackdoor.Win32.A.Agent.279552[UPX]
ZoneAlarmBackdoor.Win32.Agent.bjev
GDataWin32.Trojan.PSE.1Y6NT5X
GoogleDetected
AhnLab-V3Trojan/Win32.Scar.R2290
VBA32Backdoor.Agent
ALYacBackdoor.Fynloski.S
MAXmalware (ai score=84)
MalwarebytesMalware.AI.3478167334
PandaTrj/Genetic.gen
TrendMicro-HouseCallBKDR_FYNLOS.SMIA
RisingBackdoor.Fynloski!8.1FD (TFE:5:pVBxcwzwTJL)
YandexTrojan.Comet.Gen.LO
IkarusTrojan.Win32.CDur
MaxSecureBackdoor.Agent.bjev
FortinetW32/COMDAR.SMI!tr
BitDefenderThetaAI:Packer.9D8A8DA919
AVGWin32:Trojan-gen
DeepInstinctMALICIOUS

How to remove Backdoor.Fynloski.S?

Backdoor.Fynloski.S 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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