MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4db331198b2aadcb90aadfbb9f68c033e08eea1eacb3020cd45eaa407bc4c1dc. 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 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4db331198b2aadcb90aadfbb9f68c033e08eea1eacb3020cd45eaa407bc4c1dc
SHA3-384 hash: 16d8d53b5edd6659c9c689f0bc2eb93bb681957d43a862c4d71436e302b82d82954788567a1a2d27ea2181f653a6db69
SHA1 hash: e9f93cbcaa451a4fe9998a259b9f558b24cc1839
MD5 hash: 11fe4226c358fc656722df2b2cf27c5e
humanhash: bakerloo-harry-minnesota-seven
File name:arm7.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:214'164 bytes
First seen:2026-01-10 14:22:31 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 6144:KmaYmOZGLX+OF9wDOIzNwpmVaAXGFpogiVn0VM7ap+G:3aYB7OF+KpmVaAGFpogiVntOp
TLSH T14F244B56BDD1DF11D5C221BAFA6E808D33132BB8D3FA7112DD106F61638A99B0E7B601
telfhash t1b811af609ddd3d7ab5e0866ac9fae03fa47d0296a7823811065eef6e4d0b6d05130837
Magika elf
Reporter abuse_ch
Tags:elf mirai

Intelligence

File Origin
# of uploads :
1
# of downloads :
42
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.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
Changes the time when the file was created, accessed, or modified
Deletes a file
Receives data from a server
Attempts to kill processes by name
Opens a port
Sends data to a server
Deleting a recently created file
Launching a process
Connection attempt
DNS request
Sets a written file as executable
Creating a file
Changes access rights for a written file
Mounts file systems
Runs as daemon
Creating a process from a recently created file
Kills processes
Writes files to system directory
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Creates or modifies files in /init.d to set up autorun
Creates or modifies files to set up autorun
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
base64 expand fingerprint gcc lolbin masquerade mirai rust
Link:
https://www.filescan.io/uploads/696260db07ef5fa68e83bf24/reports/8ae49c83-54ec-4447-8e67-bd147cfc8e5a/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-10T08:21:00Z UTC
Last seen:
2026-01-12T10:01:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/4db331198b2aadcb90aadfbb9f68c033e08eea1eacb3020cd45eaa407bc4c1dc/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/08a69c53-cb0c-4d93-88ee-c76f21206117
Behavior Graph:
Download SVG
%3 guuid=c7d9ac7a-1a00-0000-15f1-0523070b0000 pid=2823 /usr/bin/sudo guuid=909d707d-1a00-0000-15f1-05230b0b0000 pid=2827 /tmp/sample.bin guuid=c7d9ac7a-1a00-0000-15f1-0523070b0000 pid=2823->guuid=909d707d-1a00-0000-15f1-05230b0b0000 pid=2827 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/3dd8e849-0241-4343-a94f-f675aec34387
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1847996
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: 1847996 Sample: arm7.kok.elf Startdate: 10/01/2026 Architecture: LINUX Score: 100 117 Multi AV Scanner detection for submitted file 2->117 119 Sample pipes script to sh (AV evasion) 2->119 10 arm7.kok.elf 2->10         started        13 udisksd dumpe2fs 2->13         started        15 udisksd dumpe2fs 2->15         started        17 37 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 93 /var/tmp/.monitor, POSIX 19->93 dropped 95 /var/spool/cron/root, ASCII 19->95 dropped 97 /var/spool/cron/crontabs/root, ASCII 19->97 dropped 99 7 other malicious files 19->99 dropped 121 Sample tries to set files in /etc globally writable 19->121 123 Sample tries to persist itself using /etc/profile 19->123 125 Drops files in suspicious directories 19->125 127 3 other signatures 19->127 23 arm7.kok.elf sh 19->23         started        25 arm7.kok.elf sh 19->25         started        27 arm7.kok.elf sh 19->27         started        29 141 other processes 19->29 signatures7 process8 signatures9 32 sh cp 23->32         started        36 sh .monitor 25->36         started        38 sh crontab 27->38         started        40 sh 27->40         started        135 Sample tries to kill multiple processes (SIGKILL) 29->135 42 sh cp 29->42         started        44 sh cp 29->44         started        46 sh cp 29->46         started        48 102 other processes 29->48 process10 file11 77 /usr/bin/.update, ELF 32->77 dropped 101 Writes identical ELF files to multiple locations 32->101 103 Drops invisible ELF files 32->103 105 Drops files in suspicious directories 32->105 50 .monitor 36->50         started        79 /var/spool/cron/crontabs/tmp.4S4lLd, ASCII 38->79 dropped 107 Sample tries to persist itself using cron 38->107 109 Executes the "crontab" command typically for achieving persistence 38->109 52 sh crontab 40->52         started        81 /var/.update, ELF 42->81 dropped 83 /mnt/.update, ELF 44->83 dropped 85 /media/.update, ELF 46->85 dropped 87 /var/log/.update, ELF 48->87 dropped 89 /root/.update, ELF 48->89 dropped 91 /home/.update, ELF 48->91 dropped 111 Sample tries to kill multiple processes (SIGKILL) 48->111 113 Sample deletes itself 48->113 115 Terminates several processes with shell command 'killall' 48->115 55 S99network 48->55         started        57 sh arm7.kok.elf 48->57         started        59 sh arm7.kok.elf 48->59         started        signatures12 process13 signatures14 61 .monitor arm7.kok.elf 50->61         started        63 .monitor arm7.kok.elf 50->63         started        65 .monitor arm7.kok.elf 50->65         started        73 47 other processes 50->73 129 Executes the "crontab" command typically for achieving persistence 52->129 67 S99network arm7.kok.elf 55->67         started        69 S99network arm7.kok.elf 55->69         started        71 S99network arm7.kok.elf 55->71         started        75 5 other processes 55->75 process15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/4db331198b2aadcb90aadfbb9f68c033e08eea1eacb3020cd45eaa407bc4c1dc
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4db331198b2aadcb90aadfbb9f68c033e08eea1eacb3020cd45eaa407bc4c1dc/
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-10 13:04:02 UTC
File Type:
ELF32 Little (Exe)
AV detection:
20 of 38 (52.63%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jwztcgmlfkw4xefk365z62gagpqi52q6vszqedgul2vea66eyhoa._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/260110-rqblqabx7e/
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
Unexpected DNS network traffic destination
Verdict:
Malicious
Tags:
Unix.Trojan.Mirai-10001386-0
YARA:
n/a
Link:
https://app.threat.zone/submission/3f5f66b5-10c2-4bdd-a5c3-9a7debb891f6
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/4db331198b2aadcb90aadfbb9f68c033e08eea1eacb3020cd45eaa407bc4c1dc

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_Generic_Threat_8299c877
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 4db331198b2aadcb90aadfbb9f68c033e08eea1eacb3020cd45eaa407bc4c1dc

(this sample)

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

Comments