About “UDS:Trojan.Win32.SchoolBoy” infection

The UDS:Trojan.Win32.SchoolBoy 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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Gridinsoft Anti-Malware

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 UDS:Trojan.Win32.SchoolBoy virus can do?

The binary likely contains encrypted or compressed data.
Attempts to repeatedly call a single API many times in order to delay analysis time
Anomalous binary characteristics

How to determine UDS:Trojan.Win32.SchoolBoy?


File Info:
crc32: 5A9E4073
md5: 27ff81228e1867966df9e43999e197d4
name: 27FF81228E1867966DF9E43999E197D4.mlw
sha1: a4770f760cbad0ceae1a93f500297044104c62d0
sha256: 6330710dc9eabb296a003e849fb5b915e819d74beae9c93ed5278bd278a33dfc
sha512: 89bb41ad815a0c5b20830025163cb524f6dacf05eb86a46736e1b94fdf9116820be6e79c8ccf0ac8afd068f179d565060b633ca838f5058667f70ff52ec6e64f
ssdeep: 6144:UBlkZvaF4NTBmaGjl0lNpoY/Q1d4KT18sA7nCWtK21O0xgG:UoSWNTArENeSWxnAdDxb
type: PE32 executable (console) Intel 80386, for MS Windows

Version Info:
0: [No Data]

UDS:Trojan.Win32.SchoolBoy also known as:

Bkav	W32.AIDetect.malware2
Elastic	malicious (high confidence)
Cynet	Malicious (score: 100)
Cylance	Unsafe
Sangfor	Trojan.Win32.Save.a
CrowdStrike	win/malicious_confidence_70% (W)
Cybereason	malicious.60cbad
Cyren	W32/Delf.MV.gen!Eldorado
Symantec	ML.Attribute.HighConfidence
APEX	Malicious
Kaspersky	UDS:Trojan.Win32.SchoolBoy
Sophos	ML/PE-A
BitDefenderTheta	Gen:NN.ZexaF.34670.puW@aSYLH4
McAfee-GW-Edition	BehavesLike.Win32.Ransom.dc
FireEye	Generic.mg.27ff81228e186796
SentinelOne	Static AI – Suspicious PE
eGambit	Unsafe.AI_Score_99%
Microsoft	Program:Win32/Wacapew.C!ml
AegisLab	Trojan.Win32.Encoder.trrL
McAfee	Artemis!27FF81228E18
Malwarebytes	Malware.Heuristic.1008
Rising	Malware.Heuristic!ET#97% (RDMK:cmRtazpx+GccodZygRWbweLSk4Sn)
Paloalto	generic.ml

How to remove UDS:Trojan.Win32.SchoolBoy?

UDS:Trojan.Win32.SchoolBoy 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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