MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d538d8b32caf6db4ffd172fa871c1dd0faa798c3837d2d615d68c2a163564297. 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: d538d8b32caf6db4ffd172fa871c1dd0faa798c3837d2d615d68c2a163564297
SHA3-384 hash: 16f2347877bcd225d02bd9549256a62aa190cc3be4fcf040858f640f9d960c5d99a728b4b1b4d03f6d69259d1f8e3efe
SHA1 hash: 2f33349063767ffc757ba0ce38abe4fe52b723ab
MD5 hash: 73993b1e529f0e9c4ef0cfa256552625
humanhash: tennis-virginia-purple-queen
File name:arm.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:111'828 bytes
First seen:2026-01-12 18:21:29 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:luppTlX56Jctn/OpfcDZv5HDjwys+dCkDj/ONivc5TfIEMKvXuDm:lupZlf18kvvNdCUwkY5
TLSH T1E0B33C92F981E612C6C662B7FB1E428C372707B8D3EA73029D156F21378B56A0F7B541
telfhash t180b01264473050f30ad058c5c90972015cd030210bc4b063c8c8071f5443b4a360c611
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 :
46
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-10010127-0
Create hunting rule

Unix.Trojan.Mirai-10017351-0
Create hunting rule

Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
masquerade mirai rust
Link:
https://www.filescan.io/uploads/69653be6238597d053fb2783/reports/cce0e813-2228-4094-a510-d72d3304f19b/overview
Result
Gathering data
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-12T15:07:00Z UTC
Last seen:
2026-01-12T15:09:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Mirai.b HEUR:Backdoor.Linux.Gafgyt.ij HEUR:Backdoor.Linux.Gafgyt.gu
Link:
https://opentip.kaspersky.com/d538d8b32caf6db4ffd172fa871c1dd0faa798c3837d2d615d68c2a163564297/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/014e848a-3952-487b-a684-316db92108f3
Behavior Graph:
Download SVG
%3 guuid=0c48f137-1a00-0000-c4a6-2befce0b0000 pid=3022 /usr/bin/sudo guuid=934de53a-1a00-0000-c4a6-2befd60b0000 pid=3030 /tmp/sample.bin guuid=0c48f137-1a00-0000-c4a6-2befce0b0000 pid=3022->guuid=934de53a-1a00-0000-c4a6-2befd60b0000 pid=3030 execve
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/5a75e352-6625-495b-8dbc-7dc8af129bf5
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1849435
Signature
Connects to many ports of the same IP (likely port scanning)
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 reads /proc/mounts (often used for finding a writable filesystem)
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
Suricata IDS alerts for network traffic
Terminates several processes with shell command 'killall'
Uses known network protocols on non-standard ports
Writes identical ELF files to multiple locations
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1849435 Sample: arm.kok.elf Startdate: 12/01/2026 Architecture: LINUX Score: 100 91 144.126.148.148, 10040, 10140, 10608 LOYOLAUS United States 2->91 93 146.19.191.219, 10512, 19476, 20002 FITC-ASUS France 2->93 95 15 other IPs or domains 2->95 97 Suricata IDS alerts for network traffic 2->97 99 Multi AV Scanner detection for submitted file 2->99 101 Connects to many ports of the same IP (likely port scanning) 2->101 103 Uses known network protocols on non-standard ports 2->103 11 arm.kok.elf 2->11         started        signatures3 process4 signatures5 121 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->121 14 arm.kok.elf 11->14         started        process6 file7 83 /var/spool/cron/root, ASCII 14->83 dropped 85 /var/spool/cron/crontabs/root, ASCII 14->85 dropped 87 /root/.bashrc, ASCII 14->87 dropped 89 11 other files (10 malicious) 14->89 dropped 123 Sample tries to set files in /etc globally writable 14->123 125 Sample tries to persist itself using /etc/profile 14->125 127 Drops files in suspicious directories 14->127 129 4 other signatures 14->129 18 arm.kok.elf sh 14->18         started        20 arm.kok.elf sh 14->20         started        22 arm.kok.elf sh 14->22         started        24 19 other processes 14->24 signatures8 process9 process10 26 sh .monitor 18->26         started        28 sh S99backup0 20->28         started        30 sh S99backup1 22->30         started        32 sh S99backup2 24->32         started        34 sh S99network 24->34         started        36 sh cp 24->36         started        40 16 other processes 24->40 file11 42 .monitor 26->42         started        44 S99backup0 28->44         started        46 S99backup1 30->46         started        48 S99backup2 32->48         started        50 S99network 34->50         started        73 /usr/bin/.update, ELF 36->73 dropped 107 Writes identical ELF files to multiple locations 36->107 109 Drops invisible ELF files 36->109 111 Drops files in suspicious directories 36->111 75 /var/spool/cron/crontabs/tmp.nMltMw, ASCII 40->75 dropped 77 /var/log/.update, ELF 40->77 dropped 79 /var/jbx/shared/.update, ELF 40->79 dropped 81 /boot/.update, ELF 40->81 dropped 113 Sample deletes itself 40->113 115 Sample tries to persist itself using cron 40->115 117 Executes the "crontab" command typically for achieving persistence 40->117 119 Terminates several processes with shell command 'killall' 40->119 52 sh crontab 40->52         started        signatures12 process13 signatures14 63 161 other processes 42->63 55 S99backup0 .update 44->55         started        65 147 other processes 44->65 57 S99backup1 .update 46->57         started        67 141 other processes 46->67 59 S99backup2 .update 48->59         started        69 139 other processes 48->69 61 S99network .update 50->61         started        71 137 other processes 50->71 105 Executes the "crontab" command typically for achieving persistence 52->105 process15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/d538d8b32caf6db4ffd172fa871c1dd0faa798c3837d2d615d68c2a163564297
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d538d8b32caf6db4ffd172fa871c1dd0faa798c3837d2d615d68c2a163564297/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/d538d8b32caf6db4ffd172fa871c1dd0faa798c3837d2d615d68c2a163564297
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-12 18:22:30 UTC
File Type:
ELF32 Little (Exe)
AV detection:
14 of 36 (38.89%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2u4nrmzmv5w3j76rol5ioha52d5kpggdqn6s2yk5ndbkcy2wiklq._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai
Link:
https://tria.ge/reports/260112-wz5clsbs9e/
Verdict:
Malicious
Tags:
Unix.Trojan.Mirai-10001386-0
YARA:
n/a
Link:
https://app.threat.zone/submission/21eca3a4-5dea-4203-8cb2-44722fe03fa6
Please note that we are no longer able to provide a coverage score for Virus Total.

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_d94e1020
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 d538d8b32caf6db4ffd172fa871c1dd0faa798c3837d2d615d68c2a163564297

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749723/
  
Delivery method
Distributed via web download

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