MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3bb5a1a647c716df5c0cdf477329689b9ade084bafee91ee4505437f8f473217. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


Mirai


Vendor detections: 13


Intelligence 13 IOCs YARA 14 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3bb5a1a647c716df5c0cdf477329689b9ade084bafee91ee4505437f8f473217
SHA3-384 hash: 6b6b13164bfc505ea64ecdb9d093271c85ed61d3e23a7595cdf8415409c27e9e2ef9307041942e892b9ba029fba8426c
SHA1 hash: c741febcc9395fbb64d63845d681f2605a12c864
MD5 hash: 15c7f2ea3ae8f247054367938aa7dd47
humanhash: saturn-idaho-echo-monkey
File name:x86_64.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:97'808 bytes
First seen:2026-01-18 02:11:03 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:/Hlcor9LhbU7TxtZbsQHuieqJFp1nTEiZPubw0fq2DsEO8G23:/drU7ltZbso3eqN1nTEidEfq2w723
TLSH T15AA37C42BAC088FDC45AC275525FB2B5D471FA1E2231325B97C0FE266D9ED123B1E2D2
TrID 50.1% (.) ELF Executable and Linkable format (Linux) (4022/12)
49.8% (.O) ELF Executable and Linkable format (generic) (4000/1)
Magika elf
Reporter abuse_ch
Tags:elf mirai

Intelligence

File Origin
# of uploads :
1
# of downloads :
60
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
Sanesecurity.Malware.30455.LC.BadVar.UNOFFICIAL
Create hunting rule

Unix.Trojan.Mirai-10001386-0
Create hunting rule

Unix.Trojan.Mirai-10017351-0
Create hunting rule

Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
masquerade mirai
Link:
https://www.filescan.io/uploads/696c4143f3caa3bca067acbf/reports/311da445-3224-4d37-bf8e-34a338d12e6d/overview
Verdict:
Malicious
File Type:
elf.64.le
First seen:
2026-01-17T23:19:00Z UTC
Last seen:
2026-01-17T23:46:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Mirai.b
Link:
https://opentip.kaspersky.com/3bb5a1a647c716df5c0cdf477329689b9ade084bafee91ee4505437f8f473217/results?tab=lookup
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/0f404fbb-55f6-4144-ad30-53e452277f0b
Result
Threat name:
Gafgyt
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1852637
Signature
Drops files in suspicious directories
Drops invisible ELF files
Executes the "crontab" command typically for achieving persistence
Found malware configuration
Malicious sample detected (through community Yara rule)
Modifies the '.bashrc' or '.bash_profile' file typically for persisting actions
Multi AV Scanner detection for submitted file
Sample deletes itself
Sample reads /proc/mounts (often used for finding a writable filesystem)
Sample tries to kill multiple processes (SIGKILL)
Sample tries to persist itself using /etc/profile
Sample tries to persist itself using cron
Sample tries to persist itself using System V runlevels
Sample tries to set files in /etc globally writable
Terminates several processes with shell command 'killall'
Writes identical ELF files to multiple locations
Yara detected Gafgyt
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1852637 Sample: x86_64.kok.elf Startdate: 18/01/2026 Architecture: LINUX Score: 100 102 91.92.241.12, 48146, 6969 THEZONEBG Bulgaria 2->102 104 109.202.202.202, 80 INIT7CH Switzerland 2->104 106 3 other IPs or domains 2->106 122 Found malware configuration 2->122 124 Malicious sample detected (through community Yara rule) 2->124 126 Multi AV Scanner detection for submitted file 2->126 128 Yara detected Gafgyt 2->128 11 x86_64.kok.elf 2->11         started        14 dash rm 2->14         started        16 dash rm 2->16         started        signatures3 process4 signatures5 140 Sample tries to kill multiple processes (SIGKILL) 11->140 142 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->142 18 x86_64.kok.elf 11->18         started        process6 file7 84 /var/spool/cron/root, ASCII 18->84 dropped 86 /var/spool/cron/crontabs/root, ASCII 18->86 dropped 88 /root/.bashrc, ASCII 18->88 dropped 90 11 other files (10 malicious) 18->90 dropped 130 Sample tries to set files in /etc globally writable 18->130 132 Sample tries to persist itself using /etc/profile 18->132 134 Drops files in suspicious directories 18->134 136 4 other signatures 18->136 22 x86_64.kok.elf sh 18->22         started        24 x86_64.kok.elf sh 18->24         started        26 x86_64.kok.elf sh 18->26         started        28 21 other processes 18->28 signatures8 process9 signatures10 31 sh cp 22->31         started        35 sh .monitor 24->35         started        37 sh S99backup0 26->37         started        144 Sample tries to kill multiple processes (SIGKILL) 28->144 39 sh S99backup1 28->39         started        41 sh S99backup2 28->41         started        43 sh S99network 28->43         started        45 20 other processes 28->45 process11 file12 92 /usr/bin/.update, ELF 31->92 dropped 108 Writes identical ELF files to multiple locations 31->108 110 Drops invisible ELF files 31->110 112 Drops files in suspicious directories 31->112 47 .monitor 35->47         started        49 S99backup0 37->49         started        51 S99backup1 39->51         started        53 S99backup2 41->53         started        55 S99network 43->55         started        94 /var/spool/cron/crontabs/tmp.9ERVX7, ASCII 45->94 dropped 96 /var/log/.update, ELF 45->96 dropped 98 /var/jbx/shared/.update, ELF 45->98 dropped 100 /boot/.update, ELF 45->100 dropped 114 Sample deletes itself 45->114 116 Sample tries to persist itself using cron 45->116 118 Executes the "crontab" command typically for achieving persistence 45->118 120 Terminates several processes with shell command 'killall' 45->120 57 sh crontab 45->57         started        60 sh .update 45->60         started        62 sh .update 45->62         started        64 sh .update 45->64         started        signatures13 process14 signatures15 74 46 other processes 47->74 66 S99backup0 .update 49->66         started        76 37 other processes 49->76 68 S99backup1 .update 51->68         started        78 33 other processes 51->78 70 S99backup2 .update 53->70         started        80 31 other processes 53->80 72 S99network .update 55->72         started        82 31 other processes 55->82 138 Executes the "crontab" command typically for achieving persistence 57->138 process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/3bb5a1a647c716df5c0cdf477329689b9ade084bafee91ee4505437f8f473217
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/3bb5a1a647c716df5c0cdf477329689b9ade084bafee91ee4505437f8f473217/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/3bb5a1a647c716df5c0cdf477329689b9ade084bafee91ee4505437f8f473217
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-18 03:11:18 UTC
AV detection:
9 of 38 (23.68%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ho22djshy4ln6xam35dxgklitonn4cclv7xjd3sfavbx7d2hgilq._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai botnet defense_evasion discovery execution linux persistence privilege_escalation
Link:
https://tria.ge/reports/260118-cmdjksbv8c/
Behaviour
Reads runtime system information
Writes file to shm directory
Changes its process name
Modifies Bash startup script
Creates/modifies Cron job
Creates/modifies environment variables
Deletes log files
Enumerates running processes
Modifies init.d
Modifies rc script
Write file to user bin folder
Executes dropped EXE
Mirai
Mirai family
Verdict:
Malicious
Tags:
Unix.Trojan.Mirai-7640640-0
YARA:
n/a
Link:
https://app.threat.zone/submission/d1640104-a368-4db0-9dbe-da4e6043ba74
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/3bb5a1a647c7/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.64
Link:
https://yomi.yoroi.company/submissions/3bb5a1a647c716df5c0cdf477329689b9ade084bafee91ee4505437f8f473217

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:ELF_IoT_Persistence_Hunt
Create hunting rule
Author:4r4
Description:Hunts for ELF files with persistence and download capabilities
Rule name:ELF_Toriilike_persist
Create hunting rule
Author:4r4
Description:Detects Torii IoT Botnet (stealthier Mirai alternative)
Reference:Identified via researched data
Rule name:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
Rule name:linux_generic_ipv6_catcher
Create hunting rule
Author:@_lubiedo
Description:ELF samples using IPv6 addresses
Rule name:linux_generic_irc_catcher
Create hunting rule
Author:@_lubiedo
Description:Find new ELF IRC samples
Rule name:Linux_Trojan_Gafgyt_33b4111a
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_620087b9
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_807911a2
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_9e9530a7
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_d4227dbf
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_d996d335
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_6a77af0f
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_e0cf29e2
Create hunting rule
Author:Elastic Security
Rule name:unixredflags3
Create hunting rule
Author:Tim Brown @timb_machine
Description:Hunts for UNIX red flags

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

Mirai

elf 3bb5a1a647c716df5c0cdf477329689b9ade084bafee91ee4505437f8f473217

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749718/
  
Delivery method
Distributed via web download

Comments