Categories: Worm

Worm:Win32/Nayrabot removal guide

The Worm:Win32/Nayrabot 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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Removing PC viruses manually may take hours and may damage your PC in the process. We recommend using GridinSoft Anti-Malware for virus removal. Allows to complete scan and cure your PC during the trial period.
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What Worm:Win32/Nayrabot virus can do?

  • Injection (inter-process)
  • Injection (Process Hollowing)
  • Executable code extraction
  • Injection with CreateRemoteThread in a remote process
  • Creates RWX memory
  • A process attempted to delay the analysis task.
  • Expresses interest in specific running processes
  • Performs some HTTP requests
  • Executed a process and injected code into it, probably while unpacking
  • Deletes its original binary from disk
  • Code injection with CreateRemoteThread in a remote process
  • A system process is generating network traffic likely as a result of process injection
  • Installs itself for autorun at Windows startup
  • Creates a hidden or system file
  • Creates a copy of itself
  • Connects to an IRC server, possibly part of a botnet

Related domains:

filehelp.us
api.wipmania.com

How to determine Worm:Win32/Nayrabot?


File Info:

crc32: 1EBB5B6Dmd5: 8dff88cc72e04eb2a6905b5c81b77eecname: 8DFF88CC72E04EB2A6905B5C81B77EEC.mlwsha1: cb107c5650a1279019ec7e4e5bb3974a66a5bb26sha256: 5502cb3d1769597ced14637825559c2fbf42a924292d0205b52f1e02993c2dc1sha512: 98bedf55b2d120a38ab3c24e19db3e0932e665a79ce731825488af1b1845de3b4835ea8b97761fb5de39ea7528a181ff684d2b80efdafcd6224927d05cbda5a1ssdeep: 3072:eyiJmqySsZQs2lnybI4lkLuGrpya1dW3JsObI0hAiL9mWMAdj41qr3gvA7g/fbT:ey0ySHyE9MNAiL95D3Z8bke5t20type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright xa9 1997-2011 Simon Tatham.InternalName: PuTTYFileVersion: 0.62CompanyName: Simon TathamProductName: PuTTY suiteProductVersion: 0.62FileDescription: SSH, Telnet and Rlogin clientOriginalFilename: PuTTYTranslation: 0x0409 0x04e4

Worm:Win32/Nayrabot also known as:

K7AntiVirus Trojan ( 7000000f1 )
DrWeb Trojan.DownLoader7.8295
Cynet Malicious (score: 99)
ALYac Gen:Variant.Jacard.174399
CrowdStrike win/malicious_confidence_60% (D)
Alibaba Ransom:Win32/Blocker.1e90ab4a
K7GW Trojan ( 7000000f1 )
Cybereason malicious.c72e04
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Injector.AAAD
APEX Malicious
Avast Win32:Malware-gen
Kaspersky Trojan-Ransom.Win32.Blocker.zkt
BitDefender Gen:Variant.Jacard.174399
NANO-Antivirus Trojan.Win32.Blocker.ctdukq
ViRobot Trojan.Win32.A.Blocker.168448.D
MicroWorld-eScan Gen:Variant.Jacard.174399
Ad-Aware Gen:Variant.Jacard.174399
Sophos Mal/Generic-S
Comodo Malware@#n7wcxbqqhz79
BitDefenderTheta AI:Packer.57B8C2CB16
VIPRE Trojan.Win32.Generic.pak!cobra
McAfee-GW-Edition BehavesLike.Win32.Infected.gm
FireEye Generic.mg.8dff88cc72e04eb2
Emsisoft Gen:Variant.Jacard.174399 (B)
Avira HEUR/AGEN.1115037
eGambit Generic.Malware
Antiy-AVL Trojan/Generic.ASMalwS.56CCDF
Microsoft Worm:Win32/Nayrabot
AegisLab Trojan.Win32.Blocker.j!c
GData Gen:Variant.Jacard.174399
McAfee Artemis!8DFF88CC72E0
MAX malware (ai score=100)
VBA32 TrojanDownloader.Andromeda
Panda Trj/Agent.MIZ
Tencent Malware.Win32.Gencirc.10c00b40
Yandex Trojan.GenAsa!VcmVFEn2siQ
Ikarus Trojan-Ransom.Blocker
Fortinet W32/Generic.AC.202802!tr
AVG Win32:Malware-gen
Paloalto generic.ml

How to remove Worm:Win32/Nayrabot?

  • 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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Paul Valéry

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