Categories: Backdoor

What is “Backdoor:Win32/PcClient.ZR”?

The Backdoor:Win32/PcClient.ZR 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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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.
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What Backdoor:Win32/PcClient.ZR virus can do?

  • Executable code extraction
  • At least one process apparently crashed during execution
  • Attempts to connect to a dead IP:Port (1 unique times)
  • Presents an Authenticode digital signature
  • Creates RWX memory
  • A process attempted to delay the analysis task.
  • Drops a binary and executes it
  • Unconventionial binary language: Chinese (Simplified)
  • Unconventionial language used in binary resources: Chinese (Simplified)
  • The binary likely contains encrypted or compressed data.
  • Attempts to repeatedly call a single API many times in order to delay analysis time
  • Installs itself for autorun at Windows startup
  • Checks the CPU name from registry, possibly for anti-virtualization
  • Checks the system manufacturer, likely for anti-virtualization
  • Creates a copy of itself

Related domains:

d.nxxxn.ga
r.pengyou.com

How to determine Backdoor:Win32/PcClient.ZR?


File Info:

crc32: E685ECC3md5: 71a858986dbb088913dba008e9defc56name: SQLSernsf.exesha1: 3092134cde69f46302388ea63a5a6d61561c3676sha256: 1113bff8d6e99727e0404482860b7fbfe4198196c3bc10876724af5d7af2c4besha512: ec0324a076c1bcda84f2aec1480951fa89e0fe1442f182d02fcbe9ffc2d318262768351e9c852c37208d9239caf5ac0cae0a1059dae0432b304a8eaa741f93e1ssdeep: 6144:9v5zQJVb5p72cHF1ybDFwekh212KhvwIb759QOaBjpaVRPu23E2rJmWjFc94:94VOiF1WD7kE1dTYOi8V5u23zmWFy4type: MS-DOS executable, MZ for MS-DOS

Version Info:

LegalCopyright: (C) 360.cn All Rights Reserved.InternalName: LSPFixFileVersion: 7, 1, 3, 1057CompanyName: 360.cnProductName: 360x5b89x5168x536bx58ebProductVersion: 7, 1, 3, 1057FileDescription: 360x5b89x5168x536bx58eb LSPx4feex590dx6a21x5757OriginalFilename: LSPFix.EXETranslation: 0x0804 0x04b0

Backdoor:Win32/PcClient.ZR also known as:

MicroWorld-eScan Gen:Variant.Strictor.221168
FireEye Generic.mg.71a858986dbb0889
CAT-QuickHeal Trojan.Magania.18692
McAfee GenericRXDW-XG!7348DD213AEF
Malwarebytes Backdoor.Farfli
VIPRE Trojan.Win32.Generic!BT
K7AntiVirus Trojan ( 004c81771 )
BitDefender Gen:Variant.Strictor.221168
K7GW Trojan ( 004c81771 )
Cybereason malicious.86dbb0
Invincea heuristic
F-Prot W32/S-6cc11623!Eldorado
Symantec ML.Attribute.HighConfidence
APEX Malicious
GData Gen:Variant.Strictor.221168
Kaspersky Trojan.Win32.Agent.xabxmr
Rising Backdoor.Farfli!8.B4 (TFE:5:bL8vVvLdNzM)
Ad-Aware Gen:Variant.Strictor.221168
Comodo TrojWare.Win32.Fusing.CF@5afr59
F-Secure Heuristic.HEUR/AGEN.1042577
DrWeb BackDoor.Farfli.96
Zillya Trojan.Banbra.Win32.29854
McAfee-GW-Edition GenericRXDW-XG!7348DD213AEF
Trapmine malicious.high.ml.score
CMC Virus.Win32.Sality!O
Emsisoft Gen:Variant.Strictor.221168 (B)
SentinelOne DFI – Malicious PE
Cyren W32/S-6cc11623!Eldorado
Jiangmin Backdoor.Farfli.cmb
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1042577
MAX malware (ai score=85)
Endgame malicious (high confidence)
Arcabit Trojan.Strictor.D35FF0
SUPERAntiSpyware Backdoor.PcClient/Variant
ZoneAlarm Trojan.Win32.Agent.xabxmr
Microsoft Backdoor:Win32/PcClient.ZR
AhnLab-V3 Malware/Win32.Generic.C2832100
Acronis suspicious
BitDefenderTheta Gen:NN.ZexaF.33558.xm1@aehBi2aj
ALYac Gen:Variant.Strictor.221168
VBA32 BScope.Trojan-GameThief.Magania
Cylance Unsafe
Zoner Trojan.Win32.80229
ESET-NOD32 Win32/Farfli.BGG
Tencent Malware.Win32.Gencirc.10b40de8
Yandex Trojan.PWS.Banbra!fVil7drZyCo
Ikarus Trojan.Win32.Farfli
Fortinet W32/Midie.26C0!tr
AVG Win32:Malware-gen
Avast Win32:Malware-gen
CrowdStrike win/malicious_confidence_80% (D)
MaxSecure Trojan.Malware.300983.susgen

How to remove Backdoor:Win32/PcClient.ZR?

  • 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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