MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3756c366524f4fcb4e67ab276eb497f0eb53c73e315c57ed25962f4198d857dc. 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: 9


Intelligence 9 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3756c366524f4fcb4e67ab276eb497f0eb53c73e315c57ed25962f4198d857dc
SHA3-384 hash: 6df36c9938b16412632dd2033c31a2ade96c44fc143dc46bf566d4a076ba7936dfb8aa744613c9ddcf75e71cbf37db26
SHA1 hash: 5a5ecff1d42475cca4256d9e2b077c44b3e0f0fb
MD5 hash: 9bcbbd3b90b0638bad8cbede78ce7c1f
humanhash: high-blue-music-black
File name:arm5.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:100'428 bytes
First seen:2026-01-03 18:32:41 UTC
Last seen:2026-01-04 12:59:04 UTC
File type: elf
MIME type:application/x-executable
ssdeep 1536:C1sD7smJGE54eK6Aq+SKylpYto9NwaP5bbszj/OkQUvuzQTGEGBuEK:C1sDgWP4nq+SKaZ9N7RbbkVToc
TLSH T1E4A34D92FD81DA12C6C562B7FB1E528D371753A8D2EB32038E265F21678B42B0E7B544
telfhash t1ff41e1e7dbe00aec53e4c3048adda52a5bf83c2d3f1028978a4c6b9b80664c3701e917
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 :
2
# of downloads :
64
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-10010127-0
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
masquerade mirai rust
Link:
https://www.filescan.io/uploads/695960e7127d6a14e0ce63af/reports/1ed15776-718e-4504-89bf-d64d9a3fe00d/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-03T16:40:00Z UTC
Last seen:
2026-01-04T01:46:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/3756c366524f4fcb4e67ab276eb497f0eb53c73e315c57ed25962f4198d857dc/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/3314cce5-839c-4b20-a254-692f8feb6013
Behavior Graph:
Download SVG
%3 guuid=d7f2dbc7-1900-0000-36b4-c764130b0000 pid=2835 /usr/bin/sudo guuid=855085ca-1900-0000-36b4-c7641a0b0000 pid=2842 /tmp/sample.bin guuid=d7f2dbc7-1900-0000-36b4-c764130b0000 pid=2835->guuid=855085ca-1900-0000-36b4-c7641a0b0000 pid=2842 execve
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/abd4664b-83fc-4a19-b689-cc70597258f1
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1844261
Signature
Drops files in suspicious directories
Drops invisible ELF files
Executes the "crontab" command typically for achieving persistence
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 a massive number of system processes
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
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1844261 Sample: arm5.kok.elf Startdate: 03/01/2026 Architecture: LINUX Score: 100 94 31.11.211.193, 11136, 11632, 12254 VECTRANET-ASAlZwyciestwa25381-525GdyniaPolandPL Poland 2->94 96 91.92.241.12, 50568, 6969 THEZONEBG Bulgaria 2->96 98 13 other IPs or domains 2->98 100 Multi AV Scanner detection for submitted file 2->100 11 arm5.kok.elf 2->11         started        signatures3 process4 signatures5 122 Sample tries to kill multiple processes (SIGKILL) 11->122 124 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->124 14 arm5.kok.elf 11->14         started        process6 file7 86 /var/spool/cron/root, ASCII 14->86 dropped 88 /var/spool/cron/crontabs/root, ASCII 14->88 dropped 90 /root/.bashrc, ASCII 14->90 dropped 92 11 other files (10 malicious) 14->92 dropped 126 Sample tries to set files in /etc globally writable 14->126 128 Sample tries to persist itself using /etc/profile 14->128 130 Drops files in suspicious directories 14->130 132 4 other signatures 14->132 18 arm5.kok.elf sh 14->18         started        20 arm5.kok.elf sh 14->20         started        22 arm5.kok.elf sh 14->22         started        24 79 other processes 14->24 signatures8 process9 signatures10 27 sh S99backup0 18->27         started        29 sh S99backup1 20->29         started        31 sh S99backup2 22->31         started        118 Sample tries to kill a massive number of system processes 24->118 120 Sample tries to kill multiple processes (SIGKILL) 24->120 33 sh S99network 24->33         started        35 sh cp 24->35         started        39 sh crontab 24->39         started        41 62 other processes 24->41 process11 file12 43 S99backup0 27->43         started        45 S99backup1 29->45         started        47 S99backup2 31->47         started        49 S99network 33->49         started        76 /usr/bin/.update, ELF 35->76 dropped 104 Writes identical ELF files to multiple locations 35->104 106 Drops invisible ELF files 35->106 108 Drops files in suspicious directories 35->108 78 /var/spool/cron/crontabs/tmp.m4H36i, ASCII 39->78 dropped 110 Sample tries to persist itself using cron 39->110 112 Executes the "crontab" command typically for achieving persistence 39->112 80 /var/log/.update, ELF 41->80 dropped 82 /var/jbx/shared/.update, ELF 41->82 dropped 84 /boot/.update, ELF 41->84 dropped 114 Sample deletes itself 41->114 116 Terminates several processes with shell command 'killall' 41->116 51 sh crontab 41->51         started        54 .monitor 41->54         started        56 sh .update 41->56         started        signatures13 process14 signatures15 58 S99backup0 .update 43->58         started        66 119 other processes 43->66 60 S99backup1 .update 45->60         started        68 115 other processes 45->68 62 S99backup2 .update 47->62         started        70 111 other processes 47->70 64 S99network .update 49->64         started        72 107 other processes 49->72 102 Executes the "crontab" command typically for achieving persistence 51->102 74 2 other processes 54->74 process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/3756c366524f4fcb4e67ab276eb497f0eb53c73e315c57ed25962f4198d857dc
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/3756c366524f4fcb4e67ab276eb497f0eb53c73e315c57ed25962f4198d857dc/
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-03 19:21:51 UTC
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=g5lmgzssj5h4wtthvmtw5nex6dvvhrz6gfofp3jfsyxudggyk7oa._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai
Link:
https://tria.ge/reports/260103-w641escm2v/
Verdict:
Malicious
Tags:
Unix.Trojan.Mirai-10001386-0
YARA:
n/a
Link:
https://app.threat.zone/submission/bb215a58-e1d9-4943-a632-a2c03fc8df2b
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/3756c366524f4fcb4e67ab276eb497f0eb53c73e315c57ed25962f4198d857dc

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:ach_202503_elf_Mirai
Create hunting rule
Author:abuse.ch
Description:Detects Mirai 'TSource' ELF files
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_Threat_d94e1020
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 3756c366524f4fcb4e67ab276eb497f0eb53c73e315c57ed25962f4198d857dc

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749721/
  
Delivery method
Distributed via web download

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