MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7923dfdf7ccc76a59c83125eb3086b6b7e7af4e4b072a37227b8ef65d46542c5. 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 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7923dfdf7ccc76a59c83125eb3086b6b7e7af4e4b072a37227b8ef65d46542c5
SHA3-384 hash: f10f829d8bc371efb371bd7a274a385e539bf6c2b7440bb62b9e2a39fa151b32215103c5d3430935d1a8a579aa120993
SHA1 hash: dfbaf88e60278c05f83beb4e809ae7875f009ebb
MD5 hash: f63f3c5cb27a8b0c8a21c7d44436704d
humanhash: echo-uranus-april-cat
File name:x86_32.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:161'652 bytes
First seen:2026-01-03 18:32:37 UTC
Last seen:2026-01-09 02:58:07 UTC
File type: elf
MIME type:application/x-executable
ssdeep 3072:vNvkhLXLn+MtSYYiWw7GBXfjZM/lP/nODEwgeoVos+JP:VvkxXLnLYKytfjalP/9wBP
TLSH T1E1F36D86E747C9F2F81906B46077F73709B1E93D102BDA95DB75E931AC21502E62B32C
telfhash t131518cf22a6667ad73d49a02c20b3a10ee1ed077244439a606b225d432f7e427765cbe
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 :
4
# of downloads :
46
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 access rights for a written file
Mounts file systems
Connection attempt
Runs as daemon
Kills processes
Opens a port
Launching a process
Sends data to a server
DNS request
Creating a process from a recently created file
Creating a file
Deleting a recently created file
Deletes a file
Changes the time when the file was created, accessed, or modified
Receives data from a server
Sets a written file as executable
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Writes files to system directory
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
File Type:
elf.32.le
First seen:
2026-01-03T18:07:00Z UTC
Last seen:
2026-01-04T01:46:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/7923dfdf7ccc76a59c83125eb3086b6b7e7af4e4b072a37227b8ef65d46542c5/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/f5c6c470-0139-4683-b78d-e526ce70e985
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1844265
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 a massive number of system processes
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: 1844265 Sample: x86_32.kok.elf Startdate: 03/01/2026 Architecture: LINUX Score: 100 103 Malicious sample detected (through community Yara rule) 2->103 105 Sample pipes script to sh (AV evasion) 2->105 10 dash rm x86_32.kok.elf 2->10         started        13 udisksd dumpe2fs 2->13         started        15 udisksd dumpe2fs 2->15         started        17 62 other processes 2->17 process3 signatures4 129 Sample tries to kill multiple processes (SIGKILL) 10->129 131 Sample reads /proc/mounts (often used for finding a writable filesystem) 10->131 19 x86_32.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 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 x86_32.kok.elf sh 19->23         started        25 x86_32.kok.elf sh 19->25         started        27 x86_32.kok.elf sh 19->27         started        29 74 other processes 19->29 signatures7 process8 signatures9 32 sh .monitor 23->32         started        34 sh cp 25->34         started        38 sh S99backup0 27->38         started        135 Sample tries to kill a massive number of system processes 29->135 137 Sample tries to kill multiple processes (SIGKILL) 29->137 40 sh S99backup1 29->40         started        42 sh S99backup2 29->42         started        44 sh S99network 29->44         started        46 73 other processes 29->46 process10 file11 48 .monitor 32->48         started        85 /usr/bin/.update, ELF 34->85 dropped 107 Writes identical ELF files to multiple locations 34->107 109 Drops invisible ELF files 34->109 111 Drops files in suspicious directories 34->111 50 S99backup0 38->50         started        52 S99backup1 40->52         started        54 S99backup2 42->54         started        56 S99network 44->56         started        87 /var/spool/cron/crontabs/tmp.6kNPZj, ASCII 46->87 dropped 89 /var/log/.update, ELF 46->89 dropped 91 /var/.update, ELF 46->91 dropped 93 /mnt/.update, ELF 46->93 dropped 113 Sample tries to kill multiple processes (SIGKILL) 46->113 115 Sample deletes itself 46->115 117 Sample tries to persist itself using cron 46->117 119 2 other signatures 46->119 58 sh crontab 46->58         started        61 sh .update 46->61         started        63 sh .update 46->63         started        65 2 other processes 46->65 signatures12 process13 signatures14 75 114 other processes 48->75 67 S99backup0 .update 50->67         started        77 39 other processes 50->77 69 S99backup1 .update 52->69         started        79 39 other processes 52->79 71 S99backup2 .update 54->71         started        81 39 other processes 54->81 73 S99network .update 56->73         started        83 37 other processes 56->83 133 Executes the "crontab" command typically for achieving persistence 58->133 process15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/7923dfdf7ccc76a59c83125eb3086b6b7e7af4e4b072a37227b8ef65d46542c5
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/7923dfdf7ccc76a59c83125eb3086b6b7e7af4e4b072a37227b8ef65d46542c5/
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-03 19:21:54 UTC
AV detection:
16 of 38 (42.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=per57x34zr3klhedcjplgcdlnn7hv5hewbzkg4rhxdxwlvdfilcq._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-w64pnatpht/
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
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
Creates a large amount of network flows
Verdict:
Malicious
Tags:
trojan gafgyt mirai Unix.Trojan.Mirai-10001386-0
YARA:
Linux_Trojan_Gafgyt_5bf62ce4 Linux_Trojan_Mirai_5f7b67b8 Linux_Trojan_Mirai_ae9d0fa6 Linux_Trojan_Mirai_cc93863b
Link:
https://app.threat.zone/submission/95f6ae7c-5823-44fc-91c0-214465dcad34
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/7923dfdf7ccc76a59c83125eb3086b6b7e7af4e4b072a37227b8ef65d46542c5

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_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_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 7923dfdf7ccc76a59c83125eb3086b6b7e7af4e4b072a37227b8ef65d46542c5

(this sample)

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

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