Categories: Trojan

How to remove “Trojan-Downloader.Win32.Fsysna.b”?

The Trojan-Downloader.Win32.Fsysna.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 Trojan-Downloader.Win32.Fsysna.b virus can do?

  • Attempts to connect to a dead IP:Port (1 unique times)
  • Creates RWX memory
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option
  • Reads data out of its own binary image
  • A process created a hidden window
  • Drops a binary and executes it
  • Performs some HTTP requests
  • The binary likely contains encrypted or compressed data.
  • The executable is likely packed with VMProtect
  • Tries to suspend Cuckoo threads to prevent logging of malicious activity
  • Tries to unhook or modify Windows functions monitored by Cuckoo
  • Attempts to modify proxy settings

Related domains:

z.whorecord.xyz
adba0953dd02.sn.mynetname.net
a.tomx.xyz

How to determine Trojan-Downloader.Win32.Fsysna.b?


File Info:

crc32: 9C2411ECmd5: 6a6a920343825b3c0a672e49cc497afbname: winupdate.exesha1: 1c867ae886a89a07cb1659acde97a652335e8ea4sha256: ebf3a7d478202577994b34db136423601ae831ea55470c8a60f22f519ff3cae0sha512: d984d7b935ca0f2b66cff2d4bb1314882c148653a4f62ca662d7c147ffddf928e077d20ebda91adff436d54dea8c41148496840e4f13ff24a0815f8d820d0a6essdeep: 98304:58QHbmb2LaFfTwgLP/rLgQCBvu+QDgBezjeownr8shWmkOsNd:5X/LA73nCBvu+iggmoyr1Y5Ntype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan-Downloader.Win32.Fsysna.b also known as:

Bkav HW32.Packed.
DrWeb Trojan.DownLoader32.38468
MicroWorld-eScan Trojan.GenericKD.32883528
FireEye Generic.mg.6a6a920343825b3c
McAfee Artemis!6A6A92034382
Sangfor Malware
K7AntiVirus Trojan-Downloader ( 0055df301 )
Alibaba TrojanDownloader:Win32/Fsysna.dd57e0fe
K7GW Trojan-Downloader ( 0055df301 )
Cybereason malicious.886a89
Arcabit Trojan.Generic.D1F5C348
Invincea heuristic
BitDefenderTheta Gen:NN.ZexaF.33558.@NW@aKQQV3ci
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/TrojanDownloader.Agent.EXD
Paloalto generic.ml
Kaspersky Trojan-Downloader.Win32.Fsysna.b
BitDefender Trojan.GenericKD.32883528
Ad-Aware Trojan.GenericKD.32883528
Emsisoft Trojan.GenericKD.32883528 (B)
Comodo Malware@#37x33gsyxfw6o
F-Secure Trojan.TR/Dldr.Agent.vavsv
McAfee-GW-Edition BehavesLike.Win32.Backdoor.tc
Trapmine malicious.moderate.ml.score
Sophos Mal/Generic-S
Ikarus Trojan-Downloader.Win32.Agent
Cyren W32/Trojan.MCEE-5222
Avira TR/Dldr.Agent.vavsv
Microsoft Trojan:Win32/Tiggre!plock
Endgame malicious (high confidence)
AegisLab Trojan.Win32.Generic.li22
ZoneAlarm Trojan-Downloader.Win32.Fsysna.b
GData Trojan.GenericKD.32883528
Acronis suspicious
ALYac Trojan.GenericKD.32883528
MAX malware (ai score=82)
APEX Malicious
Rising Trojan.Generic@ML.97 (RDMK:a4G5GuUWhGYghlz46C3PhQ)
SentinelOne DFI – Malicious PE
Fortinet W32/Fsysna.B!tr.dldr
AVG FileRepMalware
Panda Trj/CI.A
CrowdStrike win/malicious_confidence_100% (W)
Qihoo-360 Win32/Trojan.Downloader.e02

How to remove Trojan-Downloader.Win32.Fsysna.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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