Categories: Backdoor

How to remove “Backdoor:MSIL/Tzeebot.B”?

The Backdoor:MSIL/Tzeebot.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:MSIL/Tzeebot.B virus can do?

  • Behavioural detection: Executable code extraction – unpacking
  • Sample contains Overlay data
  • Yara rule detections observed from a process memory dump/dropped files/CAPE
  • Presents an Authenticode digital signature
  • CAPE extracted potentially suspicious content
  • Drops a binary and executes it
  • The binary likely contains encrypted or compressed data.
  • Authenticode signature is invalid

How to determine Backdoor:MSIL/Tzeebot.B?


File Info:

name: 221AE1CD4BBC019D6337.mlwpath: /opt/CAPEv2/storage/binaries/d9813f4bc13d5e0353523feaa4c74d4218c2598dd1e3c05d3660d7932497b906crc32: C75C66ABmd5: 221ae1cd4bbc019d6337aef3875ac5besha1: b156f7e159b77d7496ac8e906899f2f6f05b7487sha256: d9813f4bc13d5e0353523feaa4c74d4218c2598dd1e3c05d3660d7932497b906sha512: ea7de72ba28819567e493995457f6910a6d5157473792994ff51c2955ed9a11ef8ec0617f793cb783db8ec338d7d7d8fb49ebf08dcd6d3215064cedb81f0f9ffssdeep: 196608:QpO0Gz6Xg7be/NPAc8HrtH6n//hJqaKJEUux7+6fA53:p0G9IA99+kNJEHPO3type: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1338633B8068E6F9BDA9C987104619D830775E2672601F7FB640CA26C7DB03FF682615Fsha3_384: b5c739a6795223f824f5b78cb6b771711af4ea4b1efbfb6840b3ba7b1cfa136313d38237dac5a11b0fdeb1c170acad42ep_bytes: ff250020400000000000000000000000timestamp: 2013-04-27 06:43:43

Version Info:

Translation: 0x0000 0x04b0CompanyName: MicrosoftFileDescription: Microsot Setup InstallerFileVersion: 1.0.0.0InternalName: Setup Update Installer.exeLegalCopyright: Copyright © Microsoft 2012OriginalFilename: Setup Update Installer.exeProductVersion: 1.0.0.0Assembly Version: 1.0.0.0

Backdoor:MSIL/Tzeebot.B also known as:

MicroWorld-eScan Gen:Variant.Lazy.225710
FireEye Gen:Variant.Lazy.225710
ALYac Gen:Variant.Lazy.225710
Cylance Unsafe
K7AntiVirus Spyware ( 0048ae0e1 )
K7GW Spyware ( 0048ae0e1 )
Cybereason malicious.159b77
BitDefenderTheta Gen:NN.ZemsilF.34592.@p2@a0Grw0l
Elastic malicious (high confidence)
ESET-NOD32 a variant of MSIL/Spy.TzeeBot.A
ClamAV Win.Trojan.TinyZBot-1
Kaspersky Backdoor.MSIL.Tnzbt.l
BitDefender Gen:Variant.Lazy.225710
Cynet Malicious (score: 99)
Ad-Aware Gen:Variant.Lazy.225710
Emsisoft Gen:Variant.Lazy.225710 (B)
DrWeb Trojan.KillFiles.17488
VIPRE Gen:Variant.Lazy.225710
McAfee-GW-Edition Trojan-FFJV!221AE1CD4BBC
SentinelOne Static AI – Malicious PE
Trapmine malicious.moderate.ml.score
Sophos Troj/MSIl-BBR
APEX Malicious
GData Gen:Variant.Lazy.225710
Avira TR/Spy.Gen8
Antiy-AVL Trojan/Generic.ASMalwS.690C
Microsoft Backdoor:MSIL/Tzeebot.B
Google Detected
AhnLab-V3 Malware/Win.Generic.C5215269
McAfee Trojan-FFJV!221AE1CD4BBC
MAX malware (ai score=82)
Malwarebytes Malware.AI.3593347007
Rising Backdoor.Tnzbt!8.80DD (CLOUD)
Ikarus Trojan.MSIL.Spy
AVG MSIL:Tzeebot-B [Trj]
Avast MSIL:Tzeebot-B [Trj]

How to remove Backdoor:MSIL/Tzeebot.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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