Categories: Trojan

TrojanDropper:Win32/Randrew.B!rfn removal instruction

The TrojanDropper:Win32/Randrew.B!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 TrojanDropper:Win32/Randrew.B!rfn virus can do?

  • Executable code extraction
  • Injection (inter-process)
  • Injection (Process Hollowing)
  • Creates RWX memory
  • Expresses interest in specific running processes
  • Repeatedly searches for a not-found process, may want to run with startbrowser=1 option
  • Drops a binary and executes it
  • The binary likely contains encrypted or compressed data.
  • Uses Windows utilities for basic functionality
  • Attempts to remove evidence of file being downloaded from the Internet
  • Executed a process and injected code into it, probably while unpacking
  • Deletes its original binary from disk
  • Installs itself for autorun at Windows startup
  • Spoofs its process name and/or associated pathname to appear as a legitimate process
  • Creates a hidden or system file
  • Creates a copy of itself
  • Collects information to fingerprint the system
  • Anomalous binary characteristics
  • Attempts to modify Explorer settings to prevent hidden files from being displayed
  • Uses suspicious command line tools or Windows utilities

How to determine TrojanDropper:Win32/Randrew.B!rfn?


File Info:

crc32: 2BDCA60Cmd5: cf64e098855cc0e095584381721373bfname: CF64E098855CC0E095584381721373BF.mlwsha1: 93aceffc95698909f2d92933b2a9adb6ed2c8892sha256: 9134ca3c413e5d9856a15636fb1ab63a656dea70de6df55661185d8d2b6e6590sha512: 9b2db2f5ddb77d55b079fedb18e4f455d767485b0850092a7bb39ac5092f167ec094d1e07c5a6a56e01b25943ee9083f30c603413404ab41ef7cba5512dcfb49ssdeep: 3072:jN7AfrOlbysgKbh5L52+jtqzdw/UDKSvUHnUvT9V4+9DOyNiWubNa/ncoyOZ51:ufCl3j4+aw8DZWUvI+fAo/cotype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Assembly Version: 4.2.2.6LegalCopyright: Copyright xa9Hyperionics Technology LLC. 1999 - 2014InternalName: Xmlhttprequest BonusFileVersion: 4.2.2.6CompanyName: Hyperionics Technology LLCPrivateBuild: 4.2.2.6LegalTrademarks: Copyright xa9Hyperionics Technology LLC. 1999 - 2014Comments: F4 CuttingProductName: Xmlhttprequest BonusLanguages: EnglishProductVersion: 4.2.2.6FileDescription: F4 CuttingOriginalFilename: Xmlhttprequest BonusTranslation: 0x0409 0x04b0

TrojanDropper:Win32/Randrew.B!rfn also known as:

Bkav W32.TrojVDb.Trojan
Elastic malicious (high confidence)
DrWeb Trojan.Kasidet.8
MicroWorld-eScan Gen:Variant.Jaiko.4564
ALYac Gen:Variant.Jaiko.4564
Cylance Unsafe
Zillya Trojan.Blocker.Win32.38656
Sangfor Ransom.Win32.Blocker.8
CrowdStrike win/malicious_confidence_60% (D)
K7GW Trojan ( 004f258f1 )
K7AntiVirus Trojan ( 004f258f1 )
Symantec Trojan Horse
ESET-NOD32 Win32/Kasidet.AI
APEX Malicious
Avast Win32:Malware-gen
Cynet Malicious (score: 100)
Kaspersky Trojan-Ransom.Win32.Blocker.jxht
BitDefender Gen:Variant.Jaiko.4564
NANO-Antivirus Trojan.Win32.Blocker.elsilh
Ad-Aware Gen:Variant.Jaiko.4564
Sophos Mal/Generic-S
Comodo Malware@#bohx7g2zd361
BitDefenderTheta Gen:NN.ZexaF.34678.pu0@aqpXK!oi
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.dc
FireEye Generic.mg.cf64e098855cc0e0
Emsisoft Gen:Variant.Jaiko.4564 (B)
SentinelOne Static AI – Malicious PE
Webroot Trojan.Dropper.Gen
Avira TR/Crypt.ZPACK.pzatm
eGambit Unsafe.AI_Score_88%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft TrojanDropper:Win32/Randrew.B!rfn
Arcabit Trojan.Jaiko.D11D4
GData Gen:Variant.Jaiko.4564
TACHYON Ransom/W32.Blocker.260608.B
AhnLab-V3 Trojan/Win32.Fakon.C1792994
Acronis suspicious
McAfee Artemis!CF64E098855C
MAX malware (ai score=100)
VBA32 BScope.Trojan.Downloader
Malwarebytes MachineLearning/Anomalous.93%
Panda Trj/CI.A
Tencent Win32.Trojan.Inject.Auto
Yandex Trojan.Blocker!ixVzRoVnwfQ
Ikarus Trojan.SuspectCRC
Fortinet W32/Blocker.JXHT!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Blocker.HgIASQ4A

How to remove TrojanDropper:Win32/Randrew.B!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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