Win32/Small.NPF malicious file

The Win32/Small.NPF 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 Win32/Small.NPF virus can do?

Sample contains Overlay data
Unconventionial language used in binary resources: Arabic (Qatar)
The binary contains an unknown PE section name indicative of packing
Authenticode signature is invalid
Anomalous binary characteristics

How to determine Win32/Small.NPF?


File Info:
name: 62937D46111AE2D06324.mlw
path: /opt/CAPEv2/storage/binaries/52779ffd275220c0a8c0bcd9dea354846404ac06949b13db78ab92e1605135ad
crc32: 6D79A51B
md5: 62937d46111ae2d06324f2e95a33de57
sha1: 6770cf96fd1ab8dca8f39797c8d9513a7a3330ff
sha256: 52779ffd275220c0a8c0bcd9dea354846404ac06949b13db78ab92e1605135ad
sha512: 21ff5e2ddd87da7efdb80a9d4eaeb5d27f6a9351e49955bee4c45af64b703c9f1761fbcd431aa5b2d613cec186a58c69fc4833a00969caf5e898811b55711294
ssdeep: 1536:N5rnVmg+tFj/bcN57G7d3Dvzj4LKD2GsfvH3NdYA8vUi5L0jBBd:N5rVmg+tdW7Gx3HkLUI9dSUi5LqBb
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T18CA36C127A90C0B2C0562D304856DBB19B7EF5321B79D587BBA40B7EDF352C19A3728B
sha3_384: 9f59ec64a782ac8abd38e42853c0b7733d5ce7fed0ed6085c35fb9509a58ec8738b294072efcdd3bfb9801276f2fd390
ep_bytes: e87c6d0000e979feffffcccccccccccc
timestamp: 2015-08-13 11:41:33

Version Info:
CompanyName: Microsoft © Windows
FileDescription: Spooler Application
FileVersion: 16, 95, 2156, 456
InternalName: spooler
LegalCopyright: Microsoft Windows © 2013
OriginalFilename: splsrv.exe
ProductName: Spooler Application
ProductVersion: 16, 195, 2356, 476
Translation: 0x4009 0x04b0

Win32/Small.NPF also known as:

Bkav	W32.AIDetectMalware
Lionic	Trojan.Multi.Generic.mBLK
Elastic	malicious (high confidence)
MicroWorld-eScan	Trojan.Agent.BLXP
ClamAV	Win.Trojan.Agent-6827379-0
FireEye	Generic.mg.62937d46111ae2d0
ALYac	Trojan.Agent.BLXP
Malwarebytes	Small.Trojan.Agent.DDS
VIPRE	Trojan.Agent.BLXP
Sangfor	Trojan.Win32.Save.a
K7AntiVirus	Trojan ( 005a3ac21 )
Alibaba	Trojan:Win32/Spaeshill.f4314da6
K7GW	Riskware ( 0040eff71 )
Cybereason	malicious.6111ae
VirIT	Trojan.Win32.DownLoader15.CXFM
Cyren	W32/Agent.FSI.gen!Eldorado
Symantec	ML.Attribute.HighConfidence
ESET-NOD32	a variant of Win32/Small.NPF
APEX	Malicious
Cynet	Malicious (score: 99)
Kaspersky	UDS:Trojan.Win32.Johnnie
BitDefender	Trojan.Agent.BLXP
Emsisoft	Trojan.Agent.BLXP (B)
F-Secure	Heuristic.HEUR/AGEN.1303379
DrWeb	Trojan.DownLoader15.50842
Zillya	Trojan.Small.Win32.94671
TrendMicro	TROJ_GEN.R002C0DE723
Trapmine	suspicious.low.ml.score
Sophos	Mal/Generic-R
GData	Trojan.Agent.BLXP
Jiangmin	Trojan/Agentb.bqj
Avira	HEUR/AGEN.1303379
MAX	malware (ai score=100)
Arcabit	Trojan.Agent.BLXP
ZoneAlarm	UDS:Trojan.Win32.Johnnie
Microsoft	Trojan:Win32/Spaeshill
Google	Detected
AhnLab-V3	Trojan/Win.Spaeshill.C5395408
BitDefenderTheta	Gen:NN.ZexaF.36250.gy1@aq!2Ehai
VBA32	Trojan.Downloader
Cylance	unsafe
Panda	Trj/Genetic.gen
TrendMicro-HouseCall	TROJ_GEN.R002C0DE723
Tencent	Trojan-Dropper.Win32.Dapato.hc
Yandex	Trojan.GenAsa!LCR9Zd2YZSU
Ikarus	Trojan.Win32.Small
Fortinet	W32/Small.NPF!tr
DeepInstinct	MALICIOUS
CrowdStrike	win/malicious_confidence_100% (W)

How to remove Win32/Small.NPF?

Win32/Small.NPF 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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