MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 313ad16e03c99c76a81259cb05f2d8e3105a359e3607395ee9fd1a7f449b87ba. 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: 11


Intelligence 11 IOCs YARA 10 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 313ad16e03c99c76a81259cb05f2d8e3105a359e3607395ee9fd1a7f449b87ba
SHA3-384 hash: 0387260c4116971f4aa0455f8d423e7ed089ba943b9f7588058b8be2aa350498eabf0ba0de72f26fca54eaf8aafb2357
SHA1 hash: de35a844b69a1bb9b5249337b606444d67b22b3d
MD5 hash: f367d03ec7e499de260de19f269b55ec
humanhash: mountain-two-quiet-moon
File name:x86_32.kokz
Download: download sample
Signature Mirai
Create hunting rule
File size:95'220 bytes
First seen:2026-01-05 07:03:45 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:sv6QCx5JunFNDXQ7+03j5N2Yj7zsdatvtoyIqG9u/QMTcRlnRASk:Nx5J2K+03jL2Yj7zQOLIpinQRZ
TLSH T152936AC6A767C8F4FC2601B42133F76A5A72F6381025DB46CF25B936AC2A501B72B35D
telfhash t18d3146f5196e18e4abd47802d10e2f317d4e6bbb385037d245f399742357e8690bac38
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 :
63
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:

Behaviour
Connection attempt
Changes access rights for a written file
Sets a written file as executable
Changes the time when the file was created, accessed, or modified
Runs as daemon
Deletes a file
Kills processes
Creating a file
Opens a port
Deleting a recently created file
Creating a process from a recently created file
Launching a process
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Writes files to system directory
Creates or modifies files to set up autorun
Creates or modifies files in /init.d to set up autorun
Creates or modifies symbolic links in /init.d to set up autorun
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
masquerade mirai
Link:
https://www.filescan.io/uploads/695b626d8d1aa9829e2a8c4e/reports/757a7a47-5cac-42f7-9e29-c56bcf0535f7/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-05T06:43:00Z UTC
Last seen:
2026-01-05T07:48:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/313ad16e03c99c76a81259cb05f2d8e3105a359e3607395ee9fd1a7f449b87ba/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/5c80412c-3309-490e-9abe-0ddb04248cdd
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1844733
Signature
Drops files in suspicious directories
Drops invisible ELF files
Executes the "crontab" command typically for achieving persistence
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 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: 1844733 Sample: x86_32.kokz.elf Startdate: 05/01/2026 Architecture: LINUX Score: 100 102 91.92.241.12, 55742, 6969 THEZONEBG Bulgaria 2->102 104 34.254.182.186, 443, 44532 AMAZON-02US United States 2->104 106 54.217.10.153, 443 AMAZON-02US United States 2->106 108 Malicious sample detected (through community Yara rule) 2->108 110 Multi AV Scanner detection for submitted file 2->110 11 x86_32.kokz.elf 2->11         started        14 dash rm 2->14         started        16 dash rm 2->16         started        signatures3 process4 signatures5 136 Sample tries to kill multiple processes (SIGKILL) 11->136 138 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->138 18 x86_32.kokz.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 112 Sample tries to set files in /etc globally writable 18->112 114 Sample tries to persist itself using /etc/profile 18->114 116 Drops files in suspicious directories 18->116 118 4 other signatures 18->118 22 x86_32.kokz.elf sh 18->22         started        24 x86_32.kokz.elf sh 18->24         started        26 x86_32.kokz.elf sh 18->26         started        28 21 other processes 18->28 signatures8 process9 signatures10 31 sh .monitor 22->31         started        33 sh S99backup0 24->33         started        35 sh cp 26->35         started        140 Sample tries to kill a massive number of system processes 28->140 142 Sample tries to kill multiple processes (SIGKILL) 28->142 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 47 .monitor 31->47         started        49 S99backup0 33->49         started        92 /usr/bin/.update, ELF 35->92 dropped 120 Writes identical ELF files to multiple locations 35->120 122 Drops invisible ELF files 35->122 124 Drops files in suspicious directories 35->124 51 S99backup1 39->51         started        53 S99backup2 41->53         started        55 S99network 43->55         started        94 /var/spool/cron/crontabs/tmp.FQFn2I, 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 126 Sample deletes itself 45->126 128 Sample tries to persist itself using cron 45->128 130 Executes the "crontab" command typically for achieving persistence 45->130 132 Terminates several processes with shell command 'killall' 45->132 57 sh crontab 45->57         started        60 sh .update 45->60         started        62 sh .update 45->62         started        64 2 other processes 45->64 signatures13 process14 signatures15 74 58 other processes 47->74 66 S99backup0 .update 49->66         started        76 51 other processes 49->76 68 S99backup1 .update 51->68         started        78 47 other processes 51->78 70 S99backup2 .update 53->70         started        80 45 other processes 53->80 72 S99network .update 55->72         started        82 43 other processes 55->82 134 Executes the "crontab" command typically for achieving persistence 57->134 process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/313ad16e03c99c76a81259cb05f2d8e3105a359e3607395ee9fd1a7f449b87ba
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/313ad16e03c99c76a81259cb05f2d8e3105a359e3607395ee9fd1a7f449b87ba/
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-05 07:04:17 UTC
File Type:
ELF32 Little (Exe)
AV detection:
18 of 38 (47.37%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ge5nc3qdzgohnkaslhfql4wy4mifunm6gydtsxxj7unh6re3q65a._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
defense_evasion discovery execution linux persistence privilege_escalation
Link:
https://tria.ge/reports/260105-hv8mksspat/
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
Verdict:
Malicious
Tags:
trojan mirai gafgyt Unix.Trojan.Mirai-10001386-0
YARA:
Linux_Trojan_Gafgyt_5bf62ce4 Linux_Trojan_Mirai_b14f4c5d Linux_Trojan_Mirai_5f7b67b8 Linux_Trojan_Mirai_ae9d0fa6 Linux_Trojan_Mirai_cc93863b
Link:
https://app.threat.zone/submission/65fe21cf-453d-44d2-bfb9-8dfce2622fdc
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/313ad16e03c99c76a81259cb05f2d8e3105a359e3607395ee9fd1a7f449b87ba

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_Trojan_Gafgyt_5bf62ce4
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_5f7b67b8
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_ae9d0fa6
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_b14f4c5d
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_cc93863b
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 313ad16e03c99c76a81259cb05f2d8e3105a359e3607395ee9fd1a7f449b87ba

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749760/
  
Delivery method
Distributed via web download

Comments