Categories: Backdoor

About “Backdoor:Win32/Nosrawec.B” infection

The Backdoor:Win32/Nosrawec.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 Backdoor:Win32/Nosrawec.B virus can do?

  • Injection (inter-process)
  • Injection (Process Hollowing)
  • Executable code extraction
  • Injection with CreateRemoteThread in a remote process
  • Creates RWX memory
  • A process created a hidden window
  • Drops a binary and executes it
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic
  • Performs some HTTP requests
  • The binary likely contains encrypted or compressed data.
  • Uses Windows utilities for basic functionality
  • Executed a process and injected code into it, probably while unpacking
  • Installs itself for autorun at Windows startup
  • Creates a copy of itself

How to determine Backdoor:Win32/Nosrawec.B?


File Info:

crc32: 58C4BCD8md5: 1c210f2c98a7d44ffd53f4c1d73f4c2ename: 1C210F2C98A7D44FFD53F4C1D73F4C2E.mlwsha1: b68a21dcfc5f68afd7f5a6f9edb4d77169e65ec1sha256: 1d5257b91b8c74034f124bf3bba4457a8a03e23f456af0b7bbd79ddc0b0fa585sha512: 74ff4111488fed234fbbd9016530717533dfd3781b77a7908bfe510fb8c00f059bf7c3edf201cedc832c285772bc8288f745ec2443c6bbd11a3b7be0c90b2c61ssdeep: 24576:fZ94iYzDA4iCvT9Wpfaz5WTvOAR8tY+51Q0JkTwiHoqEOlS:fZ9GP9u+t71Q0RiHoPOYtype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Backdoor:Win32/Nosrawec.B also known as:

Bkav W32.AIDetect.malware1
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader4.61019
Cynet Malicious (score: 100)
McAfee GenericRXHO-GL!1C210F2C98A7
Cylance Unsafe
Zillya Trojan.Sasfis.Win32.15690
Sangfor Trojan.Win32.Save.a
Alibaba Ransom:Win32/Blocker.89a89d68
Cybereason malicious.c98a7d
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of Win32/Spy.Swisyn.GO
APEX Malicious
Avast Win32:Delf-PGL [Trj]
ClamAV Win.Trojan.Sasfis-23
Kaspersky Trojan-Ransom.Win32.Blocker.fmit
BitDefender Gen:Variant.Barys.5108
NANO-Antivirus Trojan.Win32.Sasfis.ctpjy
MicroWorld-eScan Gen:Variant.Barys.5108
Tencent Malware.Win32.Gencirc.114c8e6c
Ad-Aware Gen:Variant.Barys.5108
Sophos Mal/Generic-S
Comodo Malware@#qfe8ea2ngv8
BitDefenderTheta Gen:NN.ZelphiF.34692.fLW@ai9DTwmi
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Fareit.tc
FireEye Generic.mg.1c210f2c98a7d44f
Emsisoft Gen:Variant.Barys.5108 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan/Sasfis.nrg
Webroot W32.Malware.Gen
Avira DR/Delphi.Gen7
Antiy-AVL Trojan/Generic.ASMalwS.15BF75
Kingsoft Win32.Troj.Generic_a.a.(kcloud)
Microsoft Backdoor:Win32/Nosrawec.B
Arcabit Trojan.Barys.D13F4
AegisLab Trojan.Win32.Buzus.lnay
GData Gen:Variant.Barys.5108
AhnLab-V3 Trojan/Win32.Injector.C77218
VBA32 Trojan.Sasfis
MAX malware (ai score=100)
Panda Trj/CI.A
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.Sasfis!Dt9jqi1j6n4
Ikarus Trojan.Win32.SuspectCRC
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Buzus.IBW!tr
AVG Win32:Delf-PGL [Trj]
Paloalto generic.ml

How to remove Backdoor:Win32/Nosrawec.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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