MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c6acc6b8b1a257ed0487001ae9347fd97de10a2ffa47a9941b56e93f4da58705. 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 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c6acc6b8b1a257ed0487001ae9347fd97de10a2ffa47a9941b56e93f4da58705
SHA3-384 hash: 5800940cec51cf6f3641b8078e35856342af9d477f7a48711ad9c4bd0d644227141f62ff0d96563b872ad14a7e87615b
SHA1 hash: af138a99cf8973ede7d0c9a5a4d9f9a00a2ad108
MD5 hash: 31c633010210a22b2d5cf99649a056d5
humanhash: rugby-twelve-echo-washington
File name:x86_64.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:169'776 bytes
First seen:2026-01-03 18:32:38 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 3072:W0IiyQnRmyxDC59LwnI2V4cKJ1kB/29Kpf/y:W0IiBRXxDwqIWqk2/
TLSH T158F36C1AB78080FFC48AC37C42EEB636D9B1781D1279B65D5790FF253C99E20362E685
telfhash t12d41783818d1362c60fbc25bf31af96efeb108114af970a45f6ba9aadd477c81c61415
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 :
48
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-10017351-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Deleting a recently created file
Sends data to a server
Launching a process
Sets a written file as executable
Opens a port
Deletes a file
Changes the time when the file was created, accessed, or modified
Attempts to kill processes by name
Receives data from a server
Creating a file
Runs as daemon
DNS request
Connection attempt
Changes access rights for a written file
Mounts file systems
Creating a process from a recently created file
Kills processes
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 files to set up autorun
Creates or modifies symbolic links in /init.d to set up autorun
Verdict:
Malicious
File Type:
elf.64.le
First seen:
2026-01-03T18:07:00Z UTC
Last seen:
2026-01-04T15:49:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Mirai.b
Link:
https://opentip.kaspersky.com/c6acc6b8b1a257ed0487001ae9347fd97de10a2ffa47a9941b56e93f4da58705/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/96f63d4f-07a8-4862-a2cc-66f2eea65bdf
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1844264
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
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: 1844264 Sample: x86_64.kok.elf Startdate: 03/01/2026 Architecture: LINUX Score: 100 119 Malicious sample detected (through community Yara rule) 2->119 121 Sample pipes script to sh (AV evasion) 2->121 10 x86_64.kok.elf 2->10         started        13 udisksd dumpe2fs 2->13         started        15 udisksd dumpe2fs 2->15         started        17 69 other processes 2->17 process3 signatures4 133 Sample tries to kill multiple processes (SIGKILL) 10->133 135 Sample reads /proc/mounts (often used for finding a writable filesystem) 10->135 19 x86_64.kok.elf 10->19         started        process5 file6 95 /var/tmp/.monitor, POSIX 19->95 dropped 97 /var/spool/cron/root, ASCII 19->97 dropped 99 /var/spool/cron/crontabs/root, ASCII 19->99 dropped 101 11 other malicious files 19->101 dropped 125 Sample tries to set files in /etc globally writable 19->125 127 Sample tries to persist itself using /etc/profile 19->127 129 Drops files in suspicious directories 19->129 131 3 other signatures 19->131 23 x86_64.kok.elf sh 19->23         started        25 x86_64.kok.elf sh 19->25         started        27 x86_64.kok.elf sh 19->27         started        29 77 other processes 19->29 signatures7 process8 signatures9 32 sh cp 23->32         started        36 sh crontab 25->36         started        38 sh 25->38         started        40 sh cp 27->40         started        137 Sample tries to kill multiple processes (SIGKILL) 29->137 42 sh S99backup0 29->42         started        44 sh S99backup1 29->44         started        46 sh S99backup2 29->46         started        48 75 other processes 29->48 process10 file11 85 /usr/bin/.update, ELF 32->85 dropped 103 Writes identical ELF files to multiple locations 32->103 105 Drops invisible ELF files 32->105 107 Drops files in suspicious directories 32->107 87 /var/spool/cron/crontabs/tmp.MdkMys, ASCII 36->87 dropped 109 Sample tries to persist itself using cron 36->109 111 Executes the "crontab" command typically for achieving persistence 36->111 50 sh crontab 38->50         started        89 /var/log/.update, ELF 40->89 dropped 53 S99backup0 42->53         started        55 S99backup1 44->55         started        57 S99backup2 46->57         started        91 /var/.update, ELF 48->91 dropped 93 /mnt/.update, ELF 48->93 dropped 113 Sample tries to kill multiple processes (SIGKILL) 48->113 115 Sample deletes itself 48->115 117 Terminates several processes with shell command 'killall' 48->117 59 S99network 48->59         started        61 .monitor 48->61         started        63 sh .update 48->63         started        65 3 other processes 48->65 signatures12 process13 signatures14 123 Executes the "crontab" command typically for achieving persistence 50->123 67 S99backup0 .update 53->67         started        75 25 other processes 53->75 69 S99backup1 .update 55->69         started        77 23 other processes 55->77 71 S99backup2 .update 57->71         started        79 23 other processes 57->79 73 S99network .update 59->73         started        81 23 other processes 59->81 83 2 other processes 61->83 process15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/c6acc6b8b1a257ed0487001ae9347fd97de10a2ffa47a9941b56e93f4da58705
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c6acc6b8b1a257ed0487001ae9347fd97de10a2ffa47a9941b56e93f4da58705/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/c6acc6b8b1a257ed0487001ae9347fd97de10a2ffa47a9941b56e93f4da58705
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-03 19:20:41 UTC
File Type:
ELF64 Little (Exe)
AV detection:
11 of 38 (28.95%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=y2wmnofrujl62behaanosnd73f66ccrp7jd2tfa3k3ut6tnfq4cq._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai defense_evasion discovery execution linux persistence privilege_escalation
Link:
https://tria.ge/reports/260103-w64pnacm2t/
Behaviour
Reads runtime system information
Writes file to shm directory
Changes its process name
Modifies Bash startup script
Write file to user bin folder
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
Executes dropped EXE
Unexpected DNS network traffic destination
Creates a large amount of network flows
Verdict:
Malicious
Tags:
trojan gafgyt Unix.Trojan.Mirai-7640640-0
YARA:
Linux_Trojan_Gafgyt_9e9530a7 Linux_Trojan_Gafgyt_807911a2 Linux_Trojan_Gafgyt_d4227dbf Linux_Trojan_Gafgyt_d996d335 Linux_Trojan_Gafgyt_620087b9 Linux_Trojan_Gafgyt_33b4111a
Link:
https://app.threat.zone/submission/d69a2358-050c-4ffb-98da-8d3732cc66f0
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.93
Link:
https://yomi.yoroi.company/submissions/c6acc6b8b1a257ed0487001ae9347fd97de10a2ffa47a9941b56e93f4da58705

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: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_ipv6_catcher
Create hunting rule
Author:@_lubiedo
Description:ELF samples using IPv6 addresses
Rule name:Linux_Trojan_Gafgyt_33b4111a
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_620087b9
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_807911a2
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_9e9530a7
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_d4227dbf
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_d996d335
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

sh df688e5930ad7993f3b5501fcb3edcf964239e345dd9a58eed72bb579e3eb07c

Mirai

elf c6acc6b8b1a257ed0487001ae9347fd97de10a2ffa47a9941b56e93f4da58705

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749718/
  
Delivery method
Distributed via web download
  
Dropped by
SHA256 df688e5930ad7993f3b5501fcb3edcf964239e345dd9a58eed72bb579e3eb07c
  
Dropped by
MD5 fdc177c008c23440e316fc5423d66461
  
URLhaus
https://urlhaus.abuse.ch/url/3749716/

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