MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ac4577b64eb4d7041952f9af82194e7a30e70849e6bfd240ee3bb6ac99ce610d. 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 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ac4577b64eb4d7041952f9af82194e7a30e70849e6bfd240ee3bb6ac99ce610d
SHA3-384 hash: e59a56a5be530694e46ecdc07ef91961ed8c01b69188e3c5397206ce66eee791819bb4fb6c5f98387558cff68d8bf2e9
SHA1 hash: 8f451de3eeac5457f300b5cb91a02c78ec79f0e3
MD5 hash: 8f3a9286879b56a06be6329d0bf56dbc
humanhash: alabama-potato-high-white
File name:arm7.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:214'164 bytes
First seen:2026-01-05 00:28:35 UTC
Last seen:2026-01-09 02:57:51 UTC
File type: elf
MIME type:application/x-executable
ssdeep 6144:FMXVi6jXnek8FfhrvzCcdnca8Ml8dfIRdO2xm7TTvG:mXY6b8FJbdnca/l8dfIRdO5fT
TLSH T18A244B96BD91DF11D5C121BAFA6F808D33132BB8D3FA7112DD106F61638A99B0E7B501
telfhash t190112f204dad557bf6c295ae8efdb23af63d02507705f4624a28fa2d0c03ac13421827
Magika elf
Reporter abuse_ch
Tags:elf mirai

Intelligence

File Origin
# of uploads :
3
# of downloads :
79
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:
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
base64 expand fingerprint gcc lolbin masquerade rust
Link:
https://www.filescan.io/uploads/695b05de2fb7bb52ca86f258/reports/dd0f6357-9b6b-4cd0-a672-3c1ca4a2938f/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-04T21:45:00Z UTC
Last seen:
2026-01-04T23:44:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Gafgyt.ij HEUR:Backdoor.Linux.Gafgyt.gu HEUR:Backdoor.Linux.Mirai.b
Link:
https://opentip.kaspersky.com/ac4577b64eb4d7041952f9af82194e7a30e70849e6bfd240ee3bb6ac99ce610d/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/ccc3ff4b-ab28-4b1a-ba75-08e11b106c57
Behavior Graph:
Download SVG
%3 guuid=6737af28-1900-0000-3ac8-14ba620b0000 pid=2914 /usr/bin/sudo guuid=26eba92b-1900-0000-3ac8-14ba670b0000 pid=2919 /tmp/sample.bin guuid=6737af28-1900-0000-3ac8-14ba620b0000 pid=2914->guuid=26eba92b-1900-0000-3ac8-14ba670b0000 pid=2919 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/549ecf8b-2e59-42a9-be53-5f10f0b788db
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1844608
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 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: 1844608 Sample: arm7.kok.elf Startdate: 05/01/2026 Architecture: LINUX Score: 100 99 Multi AV Scanner detection for submitted file 2->99 101 Sample pipes script to sh (AV evasion) 2->101 10 arm7.kok.elf 2->10         started        13 udisksd dumpe2fs 2->13         started        15 udisksd dumpe2fs 2->15         started        17 55 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 arm7.kok.elf 10->19         started        process5 file6 75 /var/tmp/.monitor, POSIX 19->75 dropped 77 /var/spool/cron/root, ASCII 19->77 dropped 79 /var/spool/cron/crontabs/root, ASCII 19->79 dropped 81 7 other malicious files 19->81 dropped 103 Sample tries to set files in /etc globally writable 19->103 105 Sample tries to persist itself using /etc/profile 19->105 107 Drops files in suspicious directories 19->107 109 3 other signatures 19->109 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 80 other processes 19->29 signatures7 process8 signatures9 32 sh .monitor 23->32         started        34 sh S99network 25->34         started        36 sh cp 27->36         started        133 Sample tries to kill a massive number of system processes 29->133 135 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 68 other processes 29->46 process10 file11 48 .monitor 32->48         started        50 S99network 34->50         started        83 /usr/bin/.update, ELF 36->83 dropped 113 Writes identical ELF files to multiple locations 36->113 115 Drops invisible ELF files 36->115 117 Drops files in suspicious directories 36->117 85 /var/spool/cron/crontabs/tmp.ipPy1K, ASCII 40->85 dropped 119 Sample tries to persist itself using cron 40->119 121 Executes the "crontab" command typically for achieving persistence 40->121 87 /var/.update, ELF 42->87 dropped 89 /mnt/.update, ELF 44->89 dropped 91 /var/log/.update, ELF 46->91 dropped 93 /root/.update, ELF 46->93 dropped 95 /media/.update, ELF 46->95 dropped 97 /home/.update, ELF 46->97 dropped 123 Sample tries to kill multiple processes (SIGKILL) 46->123 125 Sample deletes itself 46->125 127 Terminates several processes with shell command 'killall' 46->127 52 sh crontab 46->52         started        55 sh arm7.kok.elf 46->55         started        57 sh arm7.kok.elf 46->57         started        signatures12 process13 signatures14 59 .monitor arm7.kok.elf 48->59         started        61 .monitor arm7.kok.elf 48->61         started        63 .monitor arm7.kok.elf 48->63         started        71 142 other processes 48->71 65 S99network arm7.kok.elf 50->65         started        67 S99network arm7.kok.elf 50->67         started        69 S99network arm7.kok.elf 50->69         started        73 67 other processes 50->73 111 Executes the "crontab" command typically for achieving persistence 52->111 process15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/ac4577b64eb4d7041952f9af82194e7a30e70849e6bfd240ee3bb6ac99ce610d
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ac4577b64eb4d7041952f9af82194e7a30e70849e6bfd240ee3bb6ac99ce610d/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/ac4577b64eb4d7041952f9af82194e7a30e70849e6bfd240ee3bb6ac99ce610d
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-05 00:29:18 UTC
File Type:
ELF32 Little (Exe)
AV detection:
12 of 24 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vrcxpnsowtlqigks7gxyegkopiyooccj4275eqhoho3kzgoomegq._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-aspgxsypes/
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 a large amount of network flows
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/f8551914-bf56-438a-9a3f-d43698d0f1ba
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/ac4577b64eb4d7041952f9af82194e7a30e70849e6bfd240ee3bb6ac99ce610d

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_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 ac4577b64eb4d7041952f9af82194e7a30e70849e6bfd240ee3bb6ac99ce610d

(this sample)

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

Comments