Categories: Worm

Worm:Win32/Slenfbot.ALJ information

The Worm:Win32/Slenfbot.ALJ 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 Worm:Win32/Slenfbot.ALJ 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
  • Possible date expiration check, exits too soon after checking local time
  • Anomalous file deletion behavior detected (10+)
  • A process attempted to delay the analysis task.
  • Dynamic (imported) function loading detected
  • Enumerates running processes
  • A process created a hidden window
  • CAPE extracted potentially suspicious content
  • Drops a binary and executes it
  • Unconventionial binary language: Russian
  • Unconventionial language used in binary resources: Russian
  • Authenticode signature is invalid
  • Deletes its original binary from disk
  • Checks for the presence of known windows from debuggers and forensic tools
  • Likely virus infection of existing system binary
  • Attempts to identify installed analysis tools by a known file location
  • Checks the presence of disk drives in the registry, possibly for anti-virtualization
  • Creates a copy of itself

How to determine Worm:Win32/Slenfbot.ALJ?


File Info:

name: 273D01A2783FC522F1C5.mlwpath: /opt/CAPEv2/storage/binaries/4a98cbbab39901623a18bd37090ad93ba07a3bffa7b0746881fa9ea70f3e7bd2crc32: 642928A1md5: 273d01a2783fc522f1c542b430ca385bsha1: 2820eeb1b6d3b0e4a4f40140674896acd80b534dsha256: 4a98cbbab39901623a18bd37090ad93ba07a3bffa7b0746881fa9ea70f3e7bd2sha512: 374bdc04619d793a9d1109632871dd77b7eafbe0386c2edd96b228994b68191d19a0522c9e613591812662e8dc53b5061d58979d16cd5233096213ff074a969assdeep: 6144:+olHy1qqHp6irLPXlnqpN4jKPLhtLMW629/xAvPVa72OLWYy5ynbBxveI:zYJFLPXtqp2QtxAaxqYnbBxvDtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T15C6412211084CFB7EB9C07F999273F46CBE47C6907D0812A9F90ED9D35B22E9950AB47sha3_384: 4203a915fda0c7ecdcd3e622ab5ebc769a921af9682d61e17f2110832ed311f3030a1b90e2405557fa205a2d9e8fdb50ep_bytes: 558bec83c4dcff75f4ff75f068534571timestamp: 2006-04-23 01:32:21

Version Info:

CompanyName: Корпорация МайкрософтFileDescription: Мастер переноса файлов и параметровFileVersion: 5.1.2600.5512 (xpsp.080413-2105)InternalName: MigWizLegalCopyright: © Корпорация Майкрософт. Все права защищены.OriginalFilename: MigWiz.ExeProductName: Операционная система Microsoft® Windows®ProductVersion: 5.1.2600.5512Translation: 0x0419 0x04b0

Worm:Win32/Slenfbot.ALJ also known as:

Bkav W32.AIDetect.malware2
Elastic malicious (high confidence)
DrWeb BackDoor.IRC.Bot.766
MicroWorld-eScan Gen:Variant.Razy.597994
FireEye Generic.mg.273d01a2783fc522
CAT-QuickHeal Worm.SlenfBot.Gen
McAfee Artemis!273D01A2783F
Cylance Unsafe
VIPRE VirTool.Win32.Obfuscator.da!j (v)
Sangfor PUP.Win32.Razy.51957
K7AntiVirus Trojan ( 001fffb61 )
Alibaba Exploit:Win32/ShellCode.dca00024
K7GW Trojan ( 001fffb61 )
Cybereason malicious.2783fc
BitDefenderTheta Gen:NN.ZexaF.34212.tq0@a0RF3Cec
VirIT Backdoor.Win32.Bot.BDM
Cyren W32/S-13923487!Eldorado
Symantec W32.IRCBot.NG
ESET-NOD32 a variant of Win32/Kryptik.KFX
TrendMicro-HouseCall TROJ_SPYEYE.SMEP
Paloalto generic.ml
ClamAV Win.Spyware.ye-293
Kaspersky Packed.Win32.Krap.ae
BitDefender Gen:Variant.Razy.597994
NANO-Antivirus Trojan.Win32.Kolab.gxuee
SUPERAntiSpyware Trojan.Agent/Gen-Kryptik
Avast Win32:TrojanX-gen [Trj]
Rising Exploit.ShellCode!8.2A (CLOUD)
Ad-Aware Gen:Variant.Razy.597994
Emsisoft Gen:Variant.Razy.597994 (B)
Comodo TrojWare.Win32.TrojanSpy.Zbot.G@2tckk5
Zillya Trojan.Kryptik.Win32.940155
TrendMicro TROJ_SPYEYE.SMEP
McAfee-GW-Edition BehavesLike.Win32.Dropper.fm
Sophos Mal/Generic-R + Mal/FakeAV-BW
Ikarus Trojan-Spy.Win32.Zbot
GData Gen:Variant.Razy.597994
Jiangmin Worm/Kolab.gbs
Avira TR/Crypt.EPACK.Gen2
MAX malware (ai score=100)
Antiy-AVL Trojan/Generic.ASMalwS.18A4A67
ViRobot Worm.Win32.A.Net-Kolab.237568.Q
Microsoft Worm:Win32/Slenfbot.ALJ
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Zbot.R2835
Acronis suspicious
VBA32 Trojan.Zeus.EA.0999
ALYac Gen:Variant.Razy.597994
APEX Malicious
Tencent Win32.Packed.Krap.Hpsf
Yandex Trojan.GenAsa!3Xb2XrckjEo
SentinelOne Static AI – Malicious PE
eGambit Unsafe.AI_Score_99%
Fortinet W32/Kryptik.NAS!tr
AVG Win32:TrojanX-gen [Trj]
Panda Bck/Qbot.AO
CrowdStrike win/malicious_confidence_100% (D)

How to remove Worm:Win32/Slenfbot.ALJ?

  • 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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Paul Valéry

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