MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c9b62d47d8b0d375851b556bc30c155dc606f5fdc18d6058b20dc006b9e77a5. 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: 12


Intelligence 12 IOCs YARA 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4c9b62d47d8b0d375851b556bc30c155dc606f5fdc18d6058b20dc006b9e77a5
SHA3-384 hash: a2de5dc505bae1ca07823ce46f2ccd6b7c0fd339c99ff5c4c45e7a90962d4efdbd25af758a84389edc3161cc1171a910
SHA1 hash: db1ee87a475ec51ae7318dc2bc37fcb318857a3d
MD5 hash: 2c107e68b49a67fe5ad0b2d749e00f90
humanhash: pasta-west-nine-friend
File name:arm7.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:302'494 bytes
First seen:2026-01-05 06:47:44 UTC
Last seen:2026-01-05 23:14:58 UTC
File type: elf
MIME type:application/x-executable
ssdeep 6144:LLzbsO5z++EFPsrOvzE296ballYndYIllu2jB7trCuiL/KUdK:HzbsSEFkE96banYndYIlluAhrS/S
TLSH T176544A56FF808E17C4C2177ABAAF424A33339774D3E7B20A99146BB03B8765E0E76505
telfhash t12c614f34af395826eae1c411ecfda762850deb116b64fa77df38844c11048aec86ac4f
Magika elf
Reporter abuse_ch
Tags:elf gafgyt mirai

Intelligence

File Origin
# of uploads :
2
# of downloads :
47
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
Sanesecurity.Malware.29052.TSource.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.30455.LC.BadVar.UNOFFICIAL
Create hunting rule

Unix.Dropper.Mirai-7135925-0
Create hunting rule

Unix.Dropper.Mirai-7139229-0
Create hunting rule

Unix.Trojan.Mirai-9760303-0
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:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
base64 expand fingerprint gcc lolbin masquerade mirai rust
Link:
https://www.filescan.io/uploads/695b5eb4127d6a14e0d0476d/reports/684710dc-7ac7-4299-b251-28c4c769a88c/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-05T03:55:00Z UTC
Last seen:
2026-01-05T12:43:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Mirai.id HEUR:Backdoor.Linux.Mirai.b HEUR:Backdoor.Linux.Gafgyt.ij HEUR:Backdoor.Linux.Gafgyt.gu
Link:
https://opentip.kaspersky.com/4c9b62d47d8b0d375851b556bc30c155dc606f5fdc18d6058b20dc006b9e77a5/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/e062babc-d46f-43f3-ae00-d32c3f74b77f
Behavior Graph:
Download SVG
%3 guuid=d13fea2f-3b00-0000-e7b0-39dec5030000 pid=965 /usr/bin/sudo guuid=c4e65833-3b00-0000-e7b0-39dec6030000 pid=966 /tmp/sample.bin guuid=d13fea2f-3b00-0000-e7b0-39dec5030000 pid=965->guuid=c4e65833-3b00-0000-e7b0-39dec6030000 pid=966 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/bd1112b7-24a7-40df-a4b4-bed835aa6e8c
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1844712
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 pipes script to sh (AV evasion)
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 signatures2 2 Behavior Graph ID: 1844712 Sample: arm7.kok.elf Startdate: 05/01/2026 Architecture: LINUX Score: 100 101 Multi AV Scanner detection for submitted file 2->101 103 Sample pipes script to sh (AV evasion) 2->103 10 arm7.kok.elf 2->10         started        13 udisksd dumpe2fs 2->13         started        15 udisksd dumpe2fs 2->15         started        17 66 other processes 2->17 process3 signatures4 131 Sample tries to kill multiple processes (SIGKILL) 10->131 133 Sample reads /proc/mounts (often used for finding a writable filesystem) 10->133 19 arm7.kok.elf 10->19         started        process5 file6 77 /var/tmp/.monitor, POSIX 19->77 dropped 79 /var/spool/cron/root, ASCII 19->79 dropped 81 /var/spool/cron/crontabs/root, ASCII 19->81 dropped 83 7 other malicious files 19->83 dropped 105 Sample tries to set files in /etc globally writable 19->105 107 Sample tries to persist itself using /etc/profile 19->107 109 Drops files in suspicious directories 19->109 111 3 other signatures 19->111 23 arm7.kok.elf sh 19->23         started        25 arm7.kok.elf sh 19->25         started        27 arm7.kok.elf sh 19->27         started        29 76 other processes 19->29 signatures7 process8 signatures9 32 sh S99network 23->32         started        34 sh .monitor 25->34         started        36 sh cp 27->36         started        135 Sample tries to kill multiple processes (SIGKILL) 29->135 40 sh crontab 29->40         started        42 sh cp 29->42         started        44 sh cp 29->44         started        46 71 other processes 29->46 process10 file11 48 S99network 32->48         started        50 .monitor 34->50         started        85 /usr/bin/.update, ELF 36->85 dropped 115 Writes identical ELF files to multiple locations 36->115 117 Drops invisible ELF files 36->117 119 Drops files in suspicious directories 36->119 87 /var/spool/cron/crontabs/tmp.PFbCDz, ASCII 40->87 dropped 121 Sample tries to persist itself using cron 40->121 123 Executes the "crontab" command typically for achieving persistence 40->123 89 /var/.update, ELF 42->89 dropped 91 /mnt/.update, ELF 44->91 dropped 93 /var/log/.update, ELF 46->93 dropped 95 /root/.update, ELF 46->95 dropped 97 /media/.update, ELF 46->97 dropped 99 /home/.update, ELF 46->99 dropped 125 Sample tries to kill multiple processes (SIGKILL) 46->125 127 Sample deletes itself 46->127 129 Terminates several processes with shell command 'killall' 46->129 52 sh crontab 46->52         started        55 sh arm7.kok.elf 46->55         started        57 sh arm7.kok.elf 46->57         started        59 sh arm7.kok.elf 46->59         started        signatures12 process13 signatures14 61 S99network arm7.kok.elf 48->61         started        63 S99network arm7.kok.elf 48->63         started        65 S99network arm7.kok.elf 48->65         started        73 92 other processes 48->73 67 .monitor arm7.kok.elf 50->67         started        69 .monitor arm7.kok.elf 50->69         started        71 .monitor arm7.kok.elf 50->71         started        75 91 other processes 50->75 113 Executes the "crontab" command typically for achieving persistence 52->113 process15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/4c9b62d47d8b0d375851b556bc30c155dc606f5fdc18d6058b20dc006b9e77a5
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4c9b62d47d8b0d375851b556bc30c155dc606f5fdc18d6058b20dc006b9e77a5/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/4c9b62d47d8b0d375851b556bc30c155dc606f5fdc18d6058b20dc006b9e77a5
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-05 06:48:20 UTC
File Type:
ELF32 Little (Exe)
AV detection:
11 of 24 (45.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jsnwfvd5rmgtowcrwvllymgbkxoga3273qmnmbmledoaa246o6sq._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai defense_evasion discovery execution persistence privilege_escalation
Link:
https://tria.ge/reports/260105-hk4wmsylbq/
Behaviour
Command and Scripting Interpreter: Unix Shell
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
Looks up external IP address via web service
Modifies init.d
Modifies rc script
Write file to user bin folder
Executes dropped EXE
Verdict:
Malicious
Tags:
Unix.Dropper.Mirai-7135925-0
YARA:
n/a
Link:
https://app.threat.zone/submission/aa1eb5b3-f623-46d7-bf95-d8b3a68151eb
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/4c9b62d47d8b0d375851b556bc30c155dc606f5fdc18d6058b20dc006b9e77a5

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
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_8299c877
Create hunting rule
Author:Elastic Security
Rule name:setsockopt
Create hunting rule
Author:Tim Brown @timb_machine
Description:Hunts for setsockopt() red flags
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 4c9b62d47d8b0d375851b556bc30c155dc606f5fdc18d6058b20dc006b9e77a5

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749715/
  
Delivery method
Distributed via web download

Comments