MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 03d7a243a18f053113e199837d74324b063c744679e681dde068d129d109af9f. 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 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 03d7a243a18f053113e199837d74324b063c744679e681dde068d129d109af9f
SHA3-384 hash: ea22354cf5d0a2732845ab01fc0459373d56e27bf126dbca3ab605bbf2f955691cbb786ba714b34c18747530e411d8dc
SHA1 hash: 01c899838acaf2fc37f7b3846fe2d14cd4db8e35
MD5 hash: 256146b6979b4e8eaee4f3a312cd0827
humanhash: dakota-neptune-snake-neptune
File name:x86_32.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:95'220 bytes
First seen:2026-01-11 00:54:08 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:1AHp7ZwLc48EX4NqI+mdxEv7TP7bCdr6vi/LCGOuxmcfcp7MRhhQ:4WLcII+mdxo7TP7bC7z6sJkpZ
TLSH T1C1936BC6A657C4F8FC6602B46137F73645B2E5340129EF46CF29B936AC2A601B72B34D
telfhash t1363110fa12be08e897d46d02f10f5f717d4dab7b641037e211b38835362ba4192bac34
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 :
58
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
Runs as daemon
Kills processes
Connection attempt
Opens a port
Changes access rights for a written file
Launching a process
Creating a process from a recently created file
Sets a written file as executable
Creating a file
Deletes a file
Changes the time when the file was created, accessed, or modified
Deleting a recently created file
Writes files to system directory
Substitutes an application name
Creates or modifies files in /cron 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
Creates or modifies files to set up autorun
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
gafgyt masquerade mirai
Link:
https://www.filescan.io/uploads/6962f4c030368802bb7f9cda/reports/c09ffc5e-9f67-41be-988b-a427ebfc897c/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-10T19:20:00Z UTC
Last seen:
2026-01-12T10:01:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/03d7a243a18f053113e199837d74324b063c744679e681dde068d129d109af9f/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/5775972a-105f-4322-90c7-629a0af364bc
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1848099
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 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: 1848099 Sample: x86_32.kok.elf Startdate: 11/01/2026 Architecture: LINUX Score: 100 98 91.92.241.12, 46594, 6969 THEZONEBG Bulgaria 2->98 100 Malicious sample detected (through community Yara rule) 2->100 102 Multi AV Scanner detection for submitted file 2->102 11 x86_32.kok.elf 2->11         started        signatures3 process4 signatures5 106 Sample tries to kill multiple processes (SIGKILL) 11->106 108 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->108 14 x86_32.kok.elf 11->14         started        process6 file7 90 /var/spool/cron/root, ASCII 14->90 dropped 92 /var/spool/cron/crontabs/root, ASCII 14->92 dropped 94 /root/.bashrc, ASCII 14->94 dropped 96 11 other files (10 malicious) 14->96 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 x86_32.kok.elf sh 14->18         started        20 x86_32.kok.elf sh 14->20         started        22 x86_32.kok.elf sh 14->22         started        24 21 other processes 14->24 signatures8 process9 signatures10 27 sh cp 18->27         started        31 sh crontab 20->31         started        33 sh 20->33         started        35 sh cp 22->35         started        104 Sample tries to kill multiple processes (SIGKILL) 24->104 37 sh S99backup0 24->37         started        39 sh S99backup1 24->39         started        41 sh S99backup2 24->41         started        43 19 other processes 24->43 process11 file12 80 /usr/bin/.update, ELF 27->80 dropped 110 Writes identical ELF files to multiple locations 27->110 112 Drops invisible ELF files 27->112 114 Drops files in suspicious directories 27->114 82 /var/spool/cron/crontabs/tmp.Hu9cBW, ASCII 31->82 dropped 116 Sample tries to persist itself using cron 31->116 118 Executes the "crontab" command typically for achieving persistence 31->118 45 sh crontab 33->45         started        84 /boot/.update, ELF 35->84 dropped 48 S99backup0 37->48         started        50 S99backup1 39->50         started        52 S99backup2 41->52         started        86 /var/log/.update, ELF 43->86 dropped 88 /var/jbx/shared/.update, ELF 43->88 dropped 120 Sample deletes itself 43->120 122 Terminates several processes with shell command 'killall' 43->122 54 S99network 43->54         started        56 .monitor 43->56         started        58 sh .update 43->58         started        60 2 other processes 43->60 signatures13 process14 signatures15 124 Executes the "crontab" command typically for achieving persistence 45->124 62 S99backup0 .update 48->62         started        70 29 other processes 48->70 64 S99backup1 .update 50->64         started        72 25 other processes 50->72 66 S99backup2 .update 52->66         started        74 23 other processes 52->74 68 S99network .update 54->68         started        76 23 other processes 54->76 78 2 other processes 56->78 process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/03d7a243a18f053113e199837d74324b063c744679e681dde068d129d109af9f
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/03d7a243a18f053113e199837d74324b063c744679e681dde068d129d109af9f/
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-11 00:55:27 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=apl2eq5br4ctce7btgbx25bsjmddy5cgphtidxpandistuijv6pq._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
defense_evasion discovery execution linux persistence privilege_escalation
Link:
https://tria.ge/reports/260111-a9flcaby6a/
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 gafgyt mirai 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/9d6fadf5-f242-4852-bea6-7be9605836e7
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/03d7a243a18f053113e199837d74324b063c744679e681dde068d129d109af9f

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_irc_catcher
Create hunting rule
Author:@_lubiedo
Description:Find new ELF IRC samples
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:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
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 03d7a243a18f053113e199837d74324b063c744679e681dde068d129d109af9f

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749717/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3749760/

Comments