How to remove “Backdoor.Agent.STB”?

The Backdoor.Agent.STB 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.

GridinSoft Anti-Malware

Gridinsoft Anti-Malware

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.

6-day free trial available.

What Backdoor.Agent.STB virus can do?

The binary likely contains encrypted or compressed data.
Anomalous binary characteristics

How to determine Backdoor.Agent.STB?


File Info:
crc32: 509E162B
md5: 6e7e08e45de22a6d726dc5222f9a91ff
name: 6E7E08E45DE22A6D726DC5222F9A91FF.mlw
sha1: c7c0d75e85c7a2369691e7411ae4beb94166fddd
sha256: f1c88cd046b0ca224a1867d76d75a0e5e64db16c4f679578a3f1ded63f0872dc
sha512: 619f015ed4ac98a66f70539038ad9ff1026f5f6de33d0a61ef4a17915e1073253c06056c789b01d89f81bbbcb138f7f79a9c2842afacd35c927ad9ea7137deb4
ssdeep: 3072:/aObYrSD4kjua2DH4xWe5GWp1icKAArDZz4N9GhbkrNEk1ErhxQ7PW:/aKMSD4Yuaesp0yN90QEXhq6
type: PE32+ executable (GUI) x86-64, for MS Windows

Version Info:
LegalCopyright: xa9 Microsoft Corporation. All rights reserved.
InternalName: Wextract                
FileVersion: 8.00.7600.16385 (win7_rtm.090713-1255)
CompanyName: Microsoft Corporation
ProductName: Windowsxae Internet Explorer
ProductVersion: 8.00.7600.16385
FileDescription: Win32 Cabinet Self-Extractor                                           
OriginalFilename: WEXTRACT.EXE            .MUI
Translation: 0x0409 0x04b0

Backdoor.Agent.STB also known as:

Elastic	malicious (high confidence)
DrWeb	BackDoor.Comet.152
FireEye	Generic.mg.6e7e08e45de22a6d
McAfee	Artemis!6E7E08E45DE2
Cylance	Unsafe
VIPRE	Trojan.Win32.Generic!BT
AegisLab	Trojan.Win32.Blocker.j!c
Sangfor	Ransom.Win32.Blocker.8
Cybereason	malicious.45de22
Symantec	Trojan.Gen
ESET-NOD32	multiple detections
APEX	Malicious
TotalDefense	Win32/Tnega.XARZ!suspicious
Avast	MSIL:Agent-ACX [Trj]
Kaspersky	Trojan-Ransom.Win32.Blocker.erif
NANO-Antivirus	Trojan.Win32.Krolol.dchiwh
Tencent	Trojan-Ransom.Win32.Blocker.a
Comodo	Malware@#jsg141blnkb2
F-Secure	Trojan.TR/ATRAPS.Gen
Baidu	Win32.Trojan-Dropper.Agent.ca
TrendMicro	Ransom_Blocker.R002C0OL520
McAfee-GW-Edition	GenericRXEC-BU!8E0554D92A78
SentinelOne	Static AI – Malicious SFX
eGambit	Unsafe.AI_Score_93%
Avira	TR/ATRAPS.Gen
Antiy-AVL	Trojan[Ransom]/Win32.Blocker
Kingsoft	Win32.Troj.Undef.(kcloud)
Microsoft	Trojan:Win32/Wacatac.B!ml
ZoneAlarm	Trojan-Ransom.Win32.Blocker.erif
GData	Win32.Trojan-Dropper.BeiF.A
Cynet	Malicious (score: 100)
Malwarebytes	Backdoor.Agent.STB
Panda	Trj/CI.A
TrendMicro-HouseCall	Ransom_Blocker.R002C0OL520
Rising	Ransom.Blocker!8.12A (CLOUD)
Yandex	Trojan.Blocker!om7bUCdSlWg
Ikarus	Worm.MSIL.Agent
Fortinet	MSIL/Agent.EZ!worm
AVG	MSIL:Agent-ACX [Trj]
Paloalto	generic.ml
CrowdStrike	win/malicious_confidence_80% (D)
Qihoo-360	Win32/Trojan.Ransom.777

How to remove Backdoor.Agent.STB?

Backdoor.Agent.STB 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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