Categories: Backdoor

What is “UDS:Backdoor.Win32.Zegost”?

The UDS:Backdoor.Win32.Zegost 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 UDS:Backdoor.Win32.Zegost virus can do?

  • SetUnhandledExceptionFilter detected (possible anti-debug)
  • Executed a command line with /C or /R argument to terminate command shell on completion which can be used to hide execution
  • Creates RWX memory
  • Dynamic (imported) function loading detected
  • Reads data out of its own binary image
  • Drops a binary and executes it
  • Unconventionial language used in binary resources: Russian
  • The binary likely contains encrypted or compressed data.
  • Authenticode signature is invalid
  • A scripting utility was executed
  • Uses Windows utilities for basic functionality
  • Created a process from a suspicious location
  • Anomalous binary characteristics
  • Uses suspicious command line tools or Windows utilities

How to determine UDS:Backdoor.Win32.Zegost?


File Info:

name: C04A7238058FE9336246.mlwpath: /opt/CAPEv2/storage/binaries/881bfc8e700195909300d8650be6dca5fdb8712befbb73a0b034b849cc0469becrc32: 8908B5A0md5: c04a7238058fe9336246fef9954dce9dsha1: 96e822f67b4d55b7f52e7a3d24af73366e91e411sha256: 881bfc8e700195909300d8650be6dca5fdb8712befbb73a0b034b849cc0469besha512: ba8a2610d45bd8bb23bd981adc4ce344a7ff13c6d2821441c02de22c4880615fa65d53c3c1e42620113d2df21cee80fe44b6285fd095459531895a070a4b7d00ssdeep: 98304:bFF7EcR6g9HFP4HsbGu6vBK3QaI08GT5VndeU4a7oJHR4g3rPuredIZCfEKYwOEb:zEWBH+MKu6pKbDdDSig3rPurxC8KYw5Ttype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1BF56334330D4B075DA62A335416687B710CEF67967694DCFBFC26E68B9724FAE210382sha3_384: 2073e328e68afb9ae81c6d3328081b81d5bc16342471b7c9476afecfabe6215fae804131e1e70f212e5680d129a27969ep_bytes: e885630000e978feffff8bff558bec56timestamp: 2015-02-15 08:00:31

Version Info:

0: [No Data]

UDS:Backdoor.Win32.Zegost also known as:

Bkav W32.AIDetect.malware2
Lionic Trojan.Win32.Miner.4!c
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.GenericKD.37962372
FireEye Generic.mg.c04a7238058fe933
McAfee Artemis!C04A7238058F
Malwarebytes Malware.AI.4287853101
CrowdStrike win/malicious_confidence_60% (W)
Alibaba Backdoor:Win32/Miner.6a09ac07
Cyren W32/Trojan.CMNS-4791
Symantec Trojan.Gen.MBT
ESET-NOD32 a variant of Win32/Delf.BBD
APEX Malicious
Avast Win32:MalwareX-gen [Trj]
ClamAV Win.Malware.Zusy-9856689-0
Kaspersky UDS:Backdoor.Win32.Zegost.gen
BitDefender Trojan.GenericKD.37962372
Tencent Win32.Trojan.Delf.Suxe
Emsisoft Trojan.GenericKD.37962372 (B)
DrWeb Trojan.Siggen12.62161
TrendMicro TROJ_GEN.R002C0WJQ21
McAfee-GW-Edition BehavesLike.Win32.Generic.tc
Sophos Mal/Generic-S
Paloalto generic.ml
GData Trojan.GenericKD.37962372
Avira HEUR/AGEN.1108506
Antiy-AVL Trojan/Win32.Delf
Kingsoft Win32.Troj.Undef.(kcloud)
Gridinsoft Ransom.Win32.Wacatac.sa
Arcabit Trojan.Generic.D2434284
Microsoft Trojan:Win32/Wacatac.B!ml
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win.Generic.C4795054
BitDefenderTheta Gen:NN.ZelphiF.34062.@V0@aqpMf8mi
ALYac Trojan.GenericKD.37962372
MAX malware (ai score=82)
VBA32 TScope.Trojan.Delf
Yandex Trojan.Delf!RV89oFOzprw
Fortinet W32/Delf.BBD!tr
AVG Win32:MalwareX-gen [Trj]
Cybereason malicious.8058fe
Panda Trj/Genetic.gen

How to remove UDS:Backdoor.Win32.Zegost?

  • 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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