Categories: Malware

Should I remove “Win32:Crypt-OSU [Trj]”?

The Win32:Crypt-OSU [Trj] 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:Crypt-OSU [Trj] virus can do?

  • Behavioural detection: Executable code extraction – unpacking
  • SetUnhandledExceptionFilter detected (possible anti-debug)
  • Yara rule detections observed from a process memory dump/dropped files/CAPE
  • Creates RWX memory
  • Anomalous file deletion behavior detected (10+)
  • A process attempted to delay the analysis task.
  • Dynamic (imported) function loading detected
  • Enumerates running processes
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option
  • Reads data out of its own binary image
  • CAPE extracted potentially suspicious content
  • The binary likely contains encrypted or compressed data.
  • Removes Security and Maintenance icon from Start menu, Taskbar and notifications
  • Authenticode signature is invalid
  • Attempts to stop active services
  • Installs itself for autorun at Windows startup
  • Attempts to disable UAC
  • Attempts to modify or disable Security Center warnings
  • Attempts to modify user notification settings

How to determine Win32:Crypt-OSU [Trj]?


File Info:

name: 4DE3411F6DDA5FF9E039.mlwpath: /opt/CAPEv2/storage/binaries/fa7e27063e52f3f00b8d8cde3537804ac7e1d3d7c1c3a8d5cb387970ed8f659bcrc32: ED3D1F5Fmd5: 4de3411f6dda5ff9e03913f58fc05324sha1: 096d5667e4ef446bd3085ce6f1a7ef882a2ef7e2sha256: fa7e27063e52f3f00b8d8cde3537804ac7e1d3d7c1c3a8d5cb387970ed8f659bsha512: 71470e196e83fccb0e75b8df2f7ffe212b154501ebed449f61e22bf786ca102c9c11537e485234417cbe174d787b47f8beb898877422fe3246ee1cfb3e74db6essdeep: 12288:X4Lwdk//psFei2YAb2gtCHGNE2Qy1/yjzdqBbHCE7:AXpsFj2YmomNv4qbiE7type: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1E2A42333AF19923CE1F814B572FA933E1794D368BB9F194FC120EA9964D14D2BE01A47sha3_384: cf8ce17c5b001151d8f36d7601a4e6f954081a6c0a95e71a050fd0c62d6d1cd3a6ea464d6175da4a8471792291a72bedep_bytes: 68004040005f8d35942f40006a1d59f3timestamp: 2012-08-31 23:11:12

Version Info:

0: [No Data]

Win32:Crypt-OSU [Trj] also known as:

Bkav W32.AIDetect.malware2
Lionic Trojan.Win32.Generic.lmka
tehtris Generic.Malware
MicroWorld-eScan Trojan.VIZ.Gen.1
FireEye Generic.mg.4de3411f6dda5ff9
CAT-QuickHeal Trojan.Lethic.B
McAfee FakeAV-SecurityTool.ft
Cylance Unsafe
Sangfor Suspicious.Win32.Save.a
K7AntiVirus Trojan ( 0040f2c01 )
Alibaba VirTool:Win32/Obfuscator.2a3a263f
K7GW Trojan ( 0040f2c01 )
Cybereason malicious.f6dda5
BitDefenderTheta Gen:NN.ZexaF.34582.CqW@auO15jmm
VirIT FruadTool.Win32.Generic.AE
Cyren W32/FakeAlert.WP.gen!Eldorado
Symantec Packed.Generic.402
Elastic malicious (high confidence)
ESET-NOD32 a variant of Win32/Kryptik.ARUZ
Baidu Win32.Trojan.Kryptik.ur
TrendMicro-HouseCall TSPY_FAREIT.SMKZ
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.VIZ.Gen.1
NANO-Antivirus Trojan.Win32.Agent.dmfgzo
SUPERAntiSpyware Trojan.Agent/Gen-RogueRel
Avast Win32:Crypt-OSU [Trj]
Rising Trojan.Generic@AI.100 (RDML:kg3uwus/WAzCDVbCMb2EKw)
Ad-Aware Trojan.VIZ.Gen.1
Sophos ML/PE-A + Mal/Zbot-KR
Comodo TrojWare.Win32.Kryptik.ARQC@4t65ce
DrWeb Trojan.Packed.23721
VIPRE Trojan.VIZ.Gen.1
TrendMicro TSPY_FAREIT.SMKZ
McAfee-GW-Edition FakeAV-SecurityTool.ft
Trapmine malicious.high.ml.score
Emsisoft Trojan.VIZ.Gen.1 (B)
APEX Malicious
GData Trojan.VIZ.Gen.1
Jiangmin Trojan/Tepfer.Gen
Webroot W32.Rogue.Gen
Avira TR/FakeAV.uras.1
MAX malware (ai score=100)
Antiy-AVL Trojan/Generic.ASMalwS.55
Kingsoft Win32.Heur.KVM007.a.(kcloud)
Microsoft Rogue:Win32/Winwebsec
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Tepfer.R48343
VBA32 Trojan.FakeAV.01657
ALYac Trojan.VIZ.Gen.1
TACHYON Trojan/W32.FakeAV.461824.U
Malwarebytes Trojan.LameShield
Ikarus Trojan-PSW.Win32.Tepfer
Tencent Win32.Trojan.Fakeav.bdmx
Yandex Trojan.GenAsa!Yi1v9o0RoFE
SentinelOne Static AI – Malicious PE
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Kryptik.X!tr
AVG Win32:Crypt-OSU [Trj]
Panda Trj/Tepfer.B
CrowdStrike win/malicious_confidence_100% (W)

How to remove Win32:Crypt-OSU [Trj]?

  • 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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