Categories: Trojan

Should I remove “Trojan.Heur.PnNfrfA5ltpib”?

The Trojan.Heur.PnNfrfA5ltpib 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 Trojan.Heur.PnNfrfA5ltpib virus can do?

  • Behavioural detection: Executable code extraction – unpacking
  • Yara rule detections observed from a process memory dump/dropped files/CAPE
  • Dynamic (imported) function loading detected
  • Expresses interest in specific running processes
  • The binary contains an unknown PE section name indicative of packing
  • The binary likely contains encrypted or compressed data.
  • The executable is compressed using UPX
  • Authenticode signature is invalid
  • Installs itself for autorun at Windows startup
  • Attempts to disable or modify Explorer Folder Options
  • Attempts to disable System Restore
  • Attempts to modify Explorer settings to prevent file extensions from being displayed
  • Attempts to modify Explorer settings to prevent hidden files from being displayed

How to determine Trojan.Heur.PnNfrfA5ltpib?


File Info:

name: C84CFBE73E9549E47AD6.mlwpath: /opt/CAPEv2/storage/binaries/3c0a14aac0b6467049ba00bad2d73e6326017c71cb1982a06ed53a11f1f31390crc32: 8D46AD0Emd5: c84cfbe73e9549e47ad6e2d500768de1sha1: 1faa552c5cfbaf766fea1447190b028d1ed35c9csha256: 3c0a14aac0b6467049ba00bad2d73e6326017c71cb1982a06ed53a11f1f31390sha512: 35f04c94c97f466907c35e8716559828375c3ea324895c44bcb10e70d30dc2c99f63551130c2630eca5b292ad0a10ccd2de8a382aa04b51b94c6bbe8c5cba85dssdeep: 6144:mjQjtjFjrjQjtjFjrjUjQjtjFjrjQjtjFjrjUjQjtjFjrjQjtjFjrjUjQjtjFjrH:8type: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T10A859E037B17E01DF624C9395A0645AD63857EA18E037E6BA2203E7B3E375C62E57732sha3_384: e5344c080f0b70f6179f5582536ca2762c0cd4bf1d92c1bad9b7680d6ca8765fc4aafaedaf5a5ed9fd40418f88ed9ec7ep_bytes: 60be007041008dbe00a0feff5783cdfftimestamp: 2006-07-15 11:26:47

Version Info:

Translation: 0x0409 0x04b0ProductName: 4k51k4FileVersion: 1.12.1985ProductVersion: 1.12.1985InternalName: 4K51K4OriginalFilename: 4K51K4.exe

Trojan.Heur.PnNfrfA5ltpib also known as:

Bkav W32.AIDetect.malware2
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Trojan.Heur.PnNfrfA5ltpib
FireEye Generic.mg.c84cfbe73e9549e4
CAT-QuickHeal Worm.Ludbaruma.A3
McAfee W32/YahLover.worm.gen.b
Cylance Unsafe
Zillya Worm.Brontok.Win32.1192
Sangfor Trojan.Win32.Save.a
K7AntiVirus Trojan ( 0040f6141 )
K7GW Trojan ( 0040f6141 )
Cybereason malicious.73e954
BitDefenderTheta AI:Packer.A139C6641D
Cyren W32/A-b40369a2!Eldorado
Symantec Trojan Horse
ESET-NOD32 a variant of Win32/VB.ET
Baidu Win32.Worm.VB.k
APEX Malicious
Cynet Malicious (score: 100)
Kaspersky Email-Worm.Win32.Brontok.w
BitDefender Gen:Trojan.Heur.PnNfrfA5ltpib
NANO-Antivirus Trojan.Win32.Brontok.eultyo
SUPERAntiSpyware Worm.Brontok
Avast Win32:Brontok-BW [Wrm]
Tencent Worm.Win32.Brontok.d
Ad-Aware Gen:Trojan.Heur.PnNfrfA5ltpib
Comodo TrojWare.Win32.Regrun.Q@1gs3xh
DrWeb Win32.HLLM.Generic.411
VIPRE Worm.Win32.Ludbaruma.a (v)
TrendMicro WORM_BRONTOK.W
Emsisoft Gen:Trojan.Heur.PnNfrfA5ltpib (B)
SentinelOne Static AI – Malicious PE
Jiangmin Worm/Brontok.kd
Avira WORM/Brontok.W.2
Antiy-AVL Trojan/Generic.ASMalwS.9652B5
Kingsoft Heur.SSC.2773342.1216.(kcloud)
Microsoft Trojan:Win32/Wacatac.B!ml
ViRobot I-Worm.Win32.A.Brontok.93802[UPX]
GData Gen:Trojan.Heur.PnNfrfA5ltpib
AhnLab-V3 Worm/Win32.VB.R42952
ALYac Gen:Trojan.Heur.PnNfrfA5ltpib
MAX malware (ai score=80)
VBA32 Worm.Brontok
Malwarebytes Worm.Brontok
TrendMicro-HouseCall WORM_BRONTOK.W
Rising Worm.VBInjectEx!1.99E6 (RDMK:cmRtazqGO6ZWCWyIryIocBP1AcPO)
Yandex I-Worm.Brontok!4gJwN60hfZM
Fortinet W32/Brontok.W!worm
AVG Win32:Brontok-BW [Wrm]
Panda Trj/Vilsel.AF
CrowdStrike win/malicious_confidence_90% (D)

How to remove Trojan.Heur.PnNfrfA5ltpib?

  • 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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