How to remove “Backdoor.Win32.Udr.a”?

The Backdoor.Win32.Udr.a 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.Udr.a virus can do?

Sample contains Overlay data
The binary contains an unknown PE section name indicative of packing
Authenticode signature is invalid

How to determine Backdoor.Win32.Udr.a?


File Info:
name: B097947C1782C847F5D3.mlw
path: /opt/CAPEv2/storage/binaries/744f33bc7b0a6bcc8e86f4ff2f539d73ac70104a054ea0787d90d1299ab6b357
crc32: 5B9F5BF0
md5: b097947c1782c847f5d320853a1fca53
sha1: 1d1ea4940772d5392fce39203c2961b21aacaf78
sha256: 744f33bc7b0a6bcc8e86f4ff2f539d73ac70104a054ea0787d90d1299ab6b357
sha512: d8cfca1179d7f12921e49cce9f43db9af501ce93cfadf0aacd843611b3e0f31892bab78bede05182b19c44a7579fc0bc4879fee0713a7cd7d784e3a036d80b3d
ssdeep: 12288:stKe6Zv23Y3L/W5L/SZdSCvTF+bDTqXTa7vuJhUauik6sAtP1TbZhP1Qv174:e6Zv2e/WNSZ8CLGETfJmaa6sAxtbZp15
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1B0F423737BC2D9B2ED8744321456BB975F32F53521B62A26F3E05B262C31E10AF85B06
sha3_384: 96484601deacea136d873d8396932170d77ddf265d89980318f367f44fe5507970a472f8ba9a14682367ccb2d2b90758
ep_bytes: 5589e5535683ec4855b8ffffffff5050
timestamp: 2003-12-14 15:57:12

Version Info:
CompanyName: Microsoft Corporation
FileDescription: Generic Host Process for Win32 Services
FileVersion: 5.1.2600.0
InternalName: svchost.exe
LegalCopyright: © Microsoft Corporation. All rights reserved.
OriginalFilename: svchost.exe
ProductName: Microsoft® Windows® Operating System
ProductVersion: 5.1.2600.0
Translation: 0x0409 0x04b0

Backdoor.Win32.Udr.a also known as:

Bkav	W32.AIDetectMalware
Lionic	Trojan.Win32.Udr.tnq4
tehtris	Generic.Malware
MicroWorld-eScan	Trojan.GenericKDZ.94503
CAT-QuickHeal	Trojan.Malex.AA11
ALYac	Trojan.GenericKDZ.94503
Malwarebytes	Generic.Malware.AI.DDS
VIPRE	Trojan.GenericKDZ.94503
Sangfor	Suspicious.Win32.Save.ins
K7AntiVirus	Trojan ( 0002abb91 )
Alibaba	Backdoor:Win32/Malex.47fb682d
K7GW	Trojan ( 0002abb91 )
Cybereason	malicious.40772d
Baidu	Win32.Trojan.Agent.ff
VirIT	Trojan.Win32.Generic.SKE
Cyren	W32/Agent.ASF.gen!Eldorado
Symantec	SMG.Heur!gen
Elastic	malicious (high confidence)
APEX	Malicious
ClamAV	Win.Trojan.Ulise-10005646-0
Kaspersky	Backdoor.Win32.Udr.a
BitDefender	Trojan.GenericKDZ.94503
Avast	Other:Malware-gen [Trj]
Tencent	Backdoor.Win32.Udr.aa
Emsisoft	Trojan.GenericKDZ.94503 (B)
DrWeb	BackDoor.Udr.1
Zillya	Backdoor.Udr.Win32.3
McAfee-GW-Edition	BehavesLike.Win32.Backdoor.bc
FireEye	Trojan.GenericKDZ.94503
Sophos	Troj/Malex-AI
SentinelOne	Static AI – Malicious PE
GData	Trojan.GenericKDZ.94503
Jiangmin	Backdoor/Udr.a
Google	Detected
Antiy-AVL	Trojan[Backdoor]/Win32.Udr.a
Xcitium	Backdoor.Win32.Agent.~APN@4u0v7
Arcabit	Trojan.Generic.D17127
ViRobot	Backdoor.Win32.A.Udr.77563
ZoneAlarm	Backdoor.Win32.Udr.a
Microsoft	Trojan:Win32/Wacatac.B!ml
Cynet	Malicious (score: 100)
AhnLab-V3	Backdoor/Win32.Udr.R233673
McAfee	BackDoor-DSA
MAX	malware (ai score=83)
Cylance	unsafe
Panda	Trj/CI.A
Rising	Backdoor.Udr!1.65B3 (CLASSIC)
Yandex	Trojan.Malex.Gen.1
Ikarus	Backdoor.Win32.Udr
MaxSecure	Backdoor.W32.Udr
AVG	Other:Malware-gen [Trj]
DeepInstinct	MALICIOUS
CrowdStrike	win/malicious_confidence_100% (W)

How to remove Backdoor.Win32.Udr.a?

Backdoor.Win32.Udr.a 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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