Categories: Trojan

Trojan:Win32/Olsa!rfn removal tips

The Trojan:Win32/Olsa!rfn 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:Win32/Olsa!rfn virus can do?

  • Reads data out of its own binary image
  • Unconventionial language used in binary resources: Chinese (Simplified)
  • A scripting utility was executed
  • Creates a hidden or system file
  • Network activity detected but not expressed in API logs
  • Anomalous binary characteristics

How to determine Trojan:Win32/Olsa!rfn?


File Info:

crc32: 9320883Emd5: d12bdb084f1b6e80643a827a12cdbd60name: D12BDB084F1B6E80643A827A12CDBD60.mlwsha1: 09848451da3024e38c4022a02ca976132bd149d5sha256: a4414a4fd06be37e66b82e8bce6073c710d0c7a919bb9389401b3afebcfaa87dsha512: 365096207a4f66b80e287bda803520038d8a9e3d1606acc0457fc5f19511b7ab377b257342df5d721d3316b0ed9f976bb5bdc0a03cb3aaf6db894f6fe86d4b02ssdeep: 24576:02F7eRbp8iVtGVcG9pV1OqVtFnSQT3Q5N:0AEbVG9BSIgztype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/Olsa!rfn also known as:

Elastic malicious (high confidence)
MicroWorld-eScan Trojan.Bat.Salo.A
FireEye Generic.mg.d12bdb084f1b6e80
CAT-QuickHeal Trojan.Orsam.A4
Qihoo-360 HEUR/QVM20.1.5CA1.Malware.Gen
ALYac Trojan.Bat.Salo.A
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Malware
K7AntiVirus Trojan ( 004c4cd31 )
BitDefender Trojan.Bat.Salo.A
K7GW Trojan ( 004c4cd31 )
Cybereason malicious.84f1b6
TrendMicro TROJ_DROPPER.QBZ
Cyren W32/Imaut.A.gen!Eldorado
Symantec Trojan.Gen.2
TotalDefense Win32/SillyAutorun.AIL
Baidu Multi.Threats.InArchive
APEX Malicious
ClamAV Win.Trojan.Pcclient-4245
Kaspersky Trojan.Script.Jobber.d
NANO-Antivirus Trojan.Win32.PcClient.dgwtmn
Rising Virus.Olsa!1.A24F (CLASSIC)
Ad-Aware Dropped:Trojan.Generic.1624094
Sophos Troj/Olsa-A
Comodo Malware@#nncvvfqmcjsy
F-Secure Trojan.TR/Dropper.Gen
DrWeb BackDoor.PcClient.3131
Invincea Generic ML PUA (PUA)
McAfee-GW-Edition BehavesLike.Win32.Backdoor.bc
Emsisoft Trojan.Bat.Salo.A (B)
Jiangmin TrojanDropper.Agent.acdm
Avira TR/Dropper.Gen
MAX malware (ai score=87)
Antiy-AVL Trojan/Win32.AGeneric
Kingsoft Win32.Troj.DeepScan.a.(kcloud)
Microsoft Trojan:Win32/Olsa!rfn
Arcabit Trojan.Generic.D18C81E
AhnLab-V3 Dropper/PcClient.Gen
ZoneAlarm Trojan.Script.Jobber.d
GData Dropped:Trojan.Generic.1624094 (2x)
Cynet Malicious (score: 100)
ESET-NOD32 multiple detections
McAfee Artemis!D12BDB084F1B
VBA32 Win32.Trojan.Dropper.Heur
Malwarebytes Trojan.Dropper.SFXAI
TrendMicro-HouseCall TROJ_DROPPER.QBZ
Tencent Virus.Win32.SOLA.c
Yandex Backdoor.PcClient!Whun8uuq72A
Ikarus Trojan.SuspectCRC
Fortinet W32/PcClient.FED!tr
AVG VBS:Agent-ED [Trj]
Avast VBS:Agent-ED [Trj]
CrowdStrike win/malicious_confidence_80% (D)

How to remove Trojan:Win32/Olsa!rfn?

  • 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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