Trojan

About “Trojan.Quolko.A” infection

Malware Removal

The Trojan.Quolko.A 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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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 Trojan.Quolko.A virus can do?

  • Executable code extraction
  • Injection with CreateRemoteThread in a remote process
  • Creates RWX memory
  • A process attempted to delay the analysis task.
  • Attempts to connect to a dead IP:Port (6 unique times)
  • Starts servers listening on 0.0.0.0:21
  • Expresses interest in specific running processes
  • Unconventionial language used in binary resources: Russian
  • The executable is compressed using UPX
  • Uses Windows utilities for basic functionality
  • Tries to suspend Cuckoo threads to prevent logging of malicious activity
  • Code injection with CreateRemoteThread in a remote process
  • Crashed cuckoomon during analysis. Report this error to the Github repo.
  • Tries to unhook or modify Windows functions monitored by Cuckoo
  • Attempts to repeatedly call a single API many times in order to delay analysis time
  • Installs itself for autorun at Windows startup
  • Creates a hidden or system file
  • Clears Windows events or logs
  • Creates a copy of itself

Related domains:

supnewdmn.com
tvrstrynyvwstrtve.com
rtvwerjyuver.com
wqerveybrstyhcerveantbe.com

How to determine Trojan.Quolko.A?


File Info:

crc32: 59A176CB
md5: 646d49a2d38f1eb7521f9cb282cf4a64
name: 646D49A2D38F1EB7521F9CB282CF4A64.mlw
sha1: fa1f969ae797875f0c76e474d6caa1c411fad767
sha256: 0a7c132ab8d80511392c4b17b9b2c9ab29da753327f28c0d3509592735c3c7ae
sha512: 0f6fc26e1f109cb659c8a70c88c933955dccac875bc01a9a19579a20f2d5cb854e730e277cd12ed97217c0969759aabf6d32f5ca2b7ea276cfa967b18a6599de
ssdeep: 3072:ok59fo2r2f0oJDib8iLws7ngPZwGj9Tf8+6:ok7o2r2fj2P8sbgWGj9oN
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

0: [No Data]

Trojan.Quolko.A also known as:

BkavW32.AIDetect.malware1
Elasticmalicious (high confidence)
DrWebTrojan.Siggen6.28287
ClamAVWin.Trojan.Ransom-1391
CAT-QuickHealTrojan.Quolko.A
ALYacGen:Variant.Ser.Razy.10524
CylanceUnsafe
ZillyaTrojan.PornoBlocker.Win32.1238
SangforSuspicious.Win32.Save.a
CrowdStrikewin/malicious_confidence_100% (D)
AlibabaTrojan:Win32/Ramnit.fc7ce0f1
K7GWTrojan ( 004bcce41 )
K7AntiVirusTrojan ( 004bcce41 )
BaiduWin32.Trojan.Nimnal.e
CyrenW32/Bamital.I
SymantecW32.Ramnit.B
ESET-NOD32Win32/Ramnit.A
APEXMalicious
AvastWin32:Trojan-gen
CynetMalicious (score: 100)
KasperskyTrojan.Win32.Ramnit.w
BitDefenderGen:Variant.Ser.Razy.10524
NANO-AntivirusTrojan.Win32.AutoRun.fdtmaf
ViRobotTrojan.Win32.A.PornoBlocker.346112
MicroWorld-eScanGen:Variant.Ser.Razy.10524
Ad-AwareGen:Variant.Ser.Razy.10524
SophosML/PE-A + W32/Ramnit-A
ComodoPacked.Win32.MUPX.Gen@24tbus
BitDefenderThetaGen:NN.ZexaF.34142.vmX@a0ca69cc
VIPRETrojan.Win32.Bamital.i (v)
TrendMicroTROJ_FAKEAV.SMUP
McAfee-GW-EditionBehavesLike.Win32.Adware.fz
FireEyeGeneric.mg.646d49a2d38f1eb7
EmsisoftGen:Variant.Ser.Razy.10524 (B)
SentinelOneStatic AI – Malicious PE
JiangminTrojan/PornoBlocker.yg
Webrootnone
AviraW32/Sality.AB.2
eGambitUnsafe.AI_Score_99%
Antiy-AVLTrojan/Generic.ASMalwS.858E
MicrosoftTrojan:Win32/Ramnit
ZoneAlarmTrojan.Win32.Ramnit.w
GDataGen:Variant.Ser.Razy.10524
AhnLab-V3Win-Trojan/Bamital.Gen
Acronissuspicious
McAfeeW32/Bamital.e
MAXmalware (ai score=100)
VBA32Trojan.Ramnit
MalwarebytesBackdoor.IRCBot
PandaTrj/Bamital.E
TrendMicro-HouseCallTROJ_FAKEAV.SMUP
RisingWorm.Win32.Zbot.a (CLASSIC)
IkarusVirus.Win32.Ramnit
FortinetW32/Drooptroop.SMY!tr
AVGWin32:Trojan-gen
Paloaltogeneric.ml

How to remove Trojan.Quolko.A?

Trojan.Quolko.A 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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