MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 9b51a4f52e88bc608501150838b64f827907cecb3279794bf1d29f0472823e5a. 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 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 9b51a4f52e88bc608501150838b64f827907cecb3279794bf1d29f0472823e5a
SHA3-384 hash: 84a75e05e53e6a6ea874dc7e95cacb4f05336ed6131607c4b75e2353d4ac1c12139de8910d16a59ae0c847ec5e3a1c8d
SHA1 hash: 5bac8b35bf9c1d67be7f961e0ba4503412165ab0
MD5 hash: e77438da4d05c44ab749a2449b7060a8
humanhash: triple-ten-alanine-connecticut
File name:x86_32.kokz
Download: download sample
Signature Mirai
Create hunting rule
File size:95'220 bytes
First seen:2026-01-13 19:50:22 UTC
Last seen:2026-01-15 01:15:09 UTC
File type: elf
MIME type:application/x-executable
ssdeep 1536:Dkne7Kl3Z2sMlzPQaQk+/2kvyooDLDKJUidabvBlLJGruxqx/c2h2QaEuCH:xKl3ZpM5QaQk+/2kvBoDLDKJUikF2s4f
TLSH T100936BC6E76BC4F4EC1682B42137E37645B2E6351129EB4ACF14B976AC26502F31B38D
telfhash t1c9310ffa12be0ce893e46c12f11e5f61bd4d6b7b541032e215b39439362fe85926bd34
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 :
53
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

Verdict:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
masquerade mirai
Link:
https://www.filescan.io/uploads/6966a2063827c9e1249bdca5/reports/10c8bd0a-1e1a-409a-bcc7-affc01823dff/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-13T17:57:00Z UTC
Last seen:
2026-01-14T02:44:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/9b51a4f52e88bc608501150838b64f827907cecb3279794bf1d29f0472823e5a/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/04182419-36e3-47cf-b3f2-a58483ad37f8
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1850176
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: 1850176 Sample: x86_32.kokz.elf Startdate: 13/01/2026 Architecture: LINUX Score: 100 100 91.92.241.12, 48146, 6969 THEZONEBG Bulgaria 2->100 102 109.202.202.202, 80 INIT7CH Switzerland 2->102 104 3 other IPs or domains 2->104 120 Malicious sample detected (through community Yara rule) 2->120 122 Multi AV Scanner detection for submitted file 2->122 11 x86_32.kokz.elf 2->11         started        14 dash rm 2->14         started        16 dash rm 2->16         started        signatures3 process4 signatures5 134 Sample tries to kill multiple processes (SIGKILL) 11->134 136 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->136 18 x86_32.kokz.elf 11->18         started        process6 file7 82 /var/spool/cron/root, ASCII 18->82 dropped 84 /var/spool/cron/crontabs/root, ASCII 18->84 dropped 86 /root/.bashrc, ASCII 18->86 dropped 88 11 other files (10 malicious) 18->88 dropped 124 Sample tries to set files in /etc globally writable 18->124 126 Sample tries to persist itself using /etc/profile 18->126 128 Drops files in suspicious directories 18->128 130 4 other signatures 18->130 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 cp 22->31         started        35 sh S99backup0 24->35         started        37 sh S99backup1 26->37         started        138 Sample tries to kill multiple processes (SIGKILL) 28->138 39 sh S99backup2 28->39         started        41 sh S99network 28->41         started        43 sh crontab 28->43         started        45 20 other processes 28->45 process11 file12 90 /usr/bin/.update, ELF 31->90 dropped 106 Writes identical ELF files to multiple locations 31->106 108 Drops invisible ELF files 31->108 110 Drops files in suspicious directories 31->110 47 S99backup0 35->47         started        49 S99backup1 37->49         started        51 S99backup2 39->51         started        53 S99network 41->53         started        92 /var/spool/cron/crontabs/tmp.PENCMH, ASCII 43->92 dropped 112 Sample tries to persist itself using cron 43->112 114 Executes the "crontab" command typically for achieving persistence 43->114 94 /var/log/.update, ELF 45->94 dropped 96 /var/jbx/shared/.update, ELF 45->96 dropped 98 /boot/.update, ELF 45->98 dropped 116 Sample deletes itself 45->116 118 Terminates several processes with shell command 'killall' 45->118 55 sh crontab 45->55         started        58 .monitor 45->58         started        60 sh .update 45->60         started        62 2 other processes 45->62 signatures13 process14 signatures15 64 S99backup0 .update 47->64         started        72 45 other processes 47->72 66 S99backup1 .update 49->66         started        74 41 other processes 49->74 68 S99backup2 .update 51->68         started        76 37 other processes 51->76 70 S99network .update 53->70         started        78 31 other processes 53->78 132 Executes the "crontab" command typically for achieving persistence 55->132 80 2 other processes 58->80 process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/9b51a4f52e88bc608501150838b64f827907cecb3279794bf1d29f0472823e5a
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/9b51a4f52e88bc608501150838b64f827907cecb3279794bf1d29f0472823e5a/
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-13 19:50:32 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=tni2j5jorc6gbbibcuedrnspqj4qptwlgj4xss7r2kpqi4uchzna._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
defense_evasion discovery execution linux persistence privilege_escalation
Link:
https://tria.ge/reports/260113-ykhw6shv5c/
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/3b8ff65f-fc84-4f12-b617-bbd7ae577b55
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/9b51a4f52e88bc608501150838b64f827907cecb3279794bf1d29f0472823e5a

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: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 9b51a4f52e88bc608501150838b64f827907cecb3279794bf1d29f0472823e5a

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3757301/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3749760/
  
URLhaus
https://urlhaus.abuse.ch/url/3749717/

Comments