Categories: Malware

About “MSIL/Injector.BCU” infection

The MSIL/Injector.BCU 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 MSIL/Injector.BCU virus can do?

  • Executable code extraction
  • Injection (inter-process)
  • Injection (Process Hollowing)
  • Attempts to connect to a dead IP:Port (3 unique times)
  • Creates RWX memory
  • Possible date expiration check, exits too soon after checking local time
  • Drops a binary and executes it
  • Performs some HTTP requests
  • Creates an autorun.inf file
  • Executed a process and injected code into it, probably while unpacking
  • Sniffs keystrokes
  • A process attempted to delay the analysis task by a long amount of time.
  • A process was set to shut the system down when terminated
  • Installs itself for autorun at Windows startup
  • Creates a hidden or system file
  • Attempts to modify proxy settings
  • Creates a copy of itself

Related domains:

z.whorecord.xyz
a.tomx.xyz
gruby.sytes.net
dl.dropbox.com
ocsp.digicert.com

How to determine MSIL/Injector.BCU?


File Info:

crc32: 897FB85Fmd5: a3af603962fdad31ce64958fb2a591a7name: A3AF603962FDAD31CE64958FB2A591A7.mlwsha1: 6d3134de3056ed57946cf7ae24490939e7955015sha256: 41590ab5e724f281c37773dc3a0794b830f75ec6bf001084f610c1094abc7d47sha512: 45b2819043b058884e480eaccede5a1469950ac57eac2119fd918d48c290c70ccca858349f6e566ff3b2309e5ce7e2591fb1bac9d02047ca844f08b18508c5c0ssdeep: 6144:XirtPZxw4eOZzbewa719QIuq9DcPU4hY:y/eSzSV7DQIhcPU46type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0LegalCopyright: Copyright xa9 YZjsnRgzU 2011Assembly Version: 4.9.10.8InternalName: putty.exeFileVersion: 7.2.11.7CompanyName: Plik ObrazuProductName: .src FileProductVersion: 1.0.0.0FileDescription: Galeria Obrazow WindowsOriginalFilename: putty.exe

MSIL/Injector.BCU also known as:

K7AntiVirus Trojan ( 004e3b751 )
Elastic malicious (high confidence)
DrWeb BackDoor.Siggen.51508
Cynet Malicious (score: 100)
ALYac Gen:Heur.MSIL.Krypt.11
Cylance Unsafe
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Trojan:MSIL/Injector.f9a53799
K7GW Trojan ( 004e3b751 )
Cybereason malicious.962fda
Cyren W32/MSIL_Kryptik.CPN.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Injector.BCU
APEX Malicious
Avast MSIL:Crypt-MI [Trj]
Kaspersky HEUR:Trojan-Ransom.Win32.Generic
BitDefender Gen:Heur.MSIL.Krypt.11
NANO-Antivirus Trojan.Win32.DarkKomet.didybn
MicroWorld-eScan Gen:Heur.MSIL.Krypt.11
Tencent Win32.Trojan.Generic.Lmkt
Ad-Aware Gen:Heur.MSIL.Krypt.11
Sophos Mal/Generic-S
Comodo Backdoor.Win32.Delf.~DP@1mio9l
BitDefenderTheta Gen:NN.ZemsilF.34790.um0@a0M0jjb
VIPRE Trojan.Win32.Generic.pak!cobra
McAfee-GW-Edition Artemis!Trojan
FireEye Generic.mg.a3af603962fdad31
Emsisoft Gen:Heur.MSIL.Krypt.11 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan/Agent.hegh
Avira TR/Dropper.MSIL.Gen
eGambit Unsafe.AI_Score_99%
Kingsoft Win32.Heur.KVM007.a.(kcloud)
Microsoft Trojan:Win32/Tiggre!rfn
ZoneAlarm HEUR:Trojan-Ransom.Win32.Generic
GData Gen:Heur.MSIL.Krypt.11
AhnLab-V3 Trojan/Win32.Blocker.R53909
McAfee Artemis!A3AF603962FD
MAX malware (ai score=100)
VBA32 Hoax.Blocker
Malwarebytes PolyRansom.Virus.FileInfector.DDS
Panda Trj/Dtcontx.B
Yandex Trojan.Blocker!I2CKPuZhMu0
Ikarus Backdoor.Win32.DarkKomet
Fortinet W32/Blocker.AUGX!tr
AVG MSIL:Crypt-MI [Trj]
Paloalto generic.ml
Qihoo-360 Win32/TrojanDropper.Generic.HwMAEpsA

How to remove MSIL/Injector.BCU?

  • 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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