Categories: Malware

What is “Bulz.10731”?

The Bulz.10731 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 Bulz.10731 virus can do?

  • SetUnhandledExceptionFilter detected (possible anti-debug)
  • Creates RWX memory
  • Guard pages use detected – possible anti-debugging.
  • Dynamic (imported) function loading detected
  • Reads data out of its own binary image
  • CAPE extracted potentially suspicious content
  • The binary contains an unknown PE section name indicative of packing
  • Authenticode signature is invalid
  • Uses Windows utilities for basic functionality
  • Sniffs keystrokes
  • Installs itself for autorun at Windows startup
  • Creates a copy of itself
  • Creates known Njrat/Bladabindi RAT registry keys

How to determine Bulz.10731?


File Info:

name: 1DBD0F4E940BCC944732.mlwpath: /opt/CAPEv2/storage/binaries/69d0113a0f3707c6865995527882473b0e1a08d05d7811b417607ced3568a721crc32: 177F4975md5: 1dbd0f4e940bcc9447325f6e0400211csha1: 2c04df7b3e6814d32bf418274673756154786ad5sha256: 69d0113a0f3707c6865995527882473b0e1a08d05d7811b417607ced3568a721sha512: 6b3bfc3b147ba42f06396db1025f8c7f42d118147585d7d771af4e51b1c9c60234411484f9ea60b52a30d92419f674520c592ec17342853d103243116060ba1cssdeep: 1536:pOLhXpaXXY5HMSCX0cQTBS7UNk6Gdh9hT0uBVyJMFF4yX0vLZjSGyKf5Tpx7nDFD:psvaXI5okceo6GDH7ZyymZf577nD1type: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1C9B34E243AEE601AF173AF756BF476D6DA6EFB332707981E109103468633942FD81639sha3_384: 223430cb44b5f044721d1b7f2314f243545cffc4d5d331e5497ecbb47be9a3785c63dd1eabb5ecafe8bba8c542dc2af9ep_bytes: ff250020400000000000000000000000timestamp: 2014-11-03 21:06:33

Version Info:

Translation: 0x0000 0x04b0Comments: ЗьЪѢЛЖЖБшзЮЧГЗлИѪбиГИЛдХШёпбдИфЖйѪЗCompanyName: ЗьЪѢЛЖЖБшзЮЧГЗлИѪбиГИЛдХШёпбдИфЖйѪЗFileDescription: ЗьЪѢЛЖЖБшзЮЧГЗлИѪбиГИЛдХШёпбдИфЖйѪЗFileVersion: 1.0.0.0InternalName: microexplore.exeLegalCopyright: Copyright © 2014ЗьЪѢЛЖЖБшзЮЧГЗлИѪбиГИЛдХШёпбдИфЖйѪЗLegalTrademarks: ЗьЪѢЛЖЖБшзЮЧГЗлИѪбиГИЛдХШёпбдИфЖйѪЗOriginalFilename: microexplore.exeProductName: ЗьЪѢЛЖЖБшзЮЧГЗлИѪбиГИЛдХШёпбдИфЖйѪЗProductVersion: 1.0.0.0Assembly Version: 1.0.0.0

Bulz.10731 also known as:

Bkav W32.AIDetectNet.01
Lionic Trojan.Win32.Reconyc.4!c
Elastic malicious (high confidence)
Cynet Malicious (score: 99)
FireEye Generic.mg.1dbd0f4e940bcc94
McAfee Artemis!1DBD0F4E940B
Malwarebytes Trojan.Crypt.MSIL
Sangfor Trojan.MSIL.Kryptik.ALV
K7AntiVirus Trojan ( 700000121 )
Alibaba Trojan:MSIL/Disfa.89301287
K7GW Trojan ( 700000121 )
Cybereason malicious.e940bc
VirIT Backdoor.Win32.Generic.BAKJ
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Kryptik.ALV
APEX Malicious
Avast MSIL:GenMalicious-BAL [Trj]
Kaspersky HEUR:Trojan.MSIL.Disfa.gen
BitDefender Gen:Variant.Bulz.10731
NANO-Antivirus Trojan.Win32.Bladabindi.didqqw
MicroWorld-eScan Gen:Variant.Bulz.10731
Tencent Msil.Trojan.Disfa.Ecbl
Ad-Aware Gen:Variant.Bulz.10731
Sophos ML/PE-A + Mal/Kryptik-BA
Comodo Malware@#5bzui17oy3sf
DrWeb BackDoor.Bladabindi.1702
TrendMicro TROJ_GEN.R011C0RDN22
Emsisoft Gen:Variant.Bulz.10731 (B)
Paloalto generic.ml
GData Gen:Variant.Bulz.10731
Webroot W32.Trojan.GenKD
Avira HEUR/AGEN.1236744
Antiy-AVL Trojan/Generic.ASMalwS.CA46B3
Kingsoft Win32.Troj.Reconyc.cq.(kcloud)
Microsoft Backdoor:MSIL/Bladabindi
Acronis suspicious
BitDefenderTheta Gen:NN.ZemsilF.34606.hq0@aiokmIn
ALYac Gen:Variant.Bulz.10731
MAX malware (ai score=81)
VBA32 Trojan.Reconyc
TrendMicro-HouseCall TROJ_GEN.R011C0RDN22
Rising Malware.Obfus/MSIL@AI.90 (RDM.MSIL:zI/l9DwcRGHum85ROUZX9g)
Yandex Trojan.Kryptik!6sHjbAt+iV0
SentinelOne Static AI – Malicious PE
Fortinet MSIL/Kryptik.ALV!tr
AVG MSIL:GenMalicious-BAL [Trj]
Panda Trj/CI.A
CrowdStrike win/malicious_confidence_100% (W)

How to remove Bulz.10731?

  • 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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