MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 87833480c0097231366a873fe3c90db36d558e4a50abc998dbdaec640a463f26. 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: 87833480c0097231366a873fe3c90db36d558e4a50abc998dbdaec640a463f26
SHA3-384 hash: 04f72857bb0855b46992a8e1593cf3ed4c0c7d80c1aafb34074a1804660607e54345f601b6771e0fe4cd19efd0f4d4fa
SHA1 hash: 9c62501856ee2dddbc069858237702f89afa973a
MD5 hash: d15836a61a3ae2cf4116b8be7565dc29
humanhash: edward-kentucky-green-tennis
File name:arm5.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:104'752 bytes
First seen:2026-01-10 00:58:59 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:fKKKHD0HycIwEHb5V1TJqgchW0EKDG/GAADjwORNnXFfj/Ob/v7uFQau51AmRR5:fKKKj0fIVFgx2Z/jsnnXl6a47
TLSH T142A34C92FD81DA12C6C561B7FB1E528C771713B8C2EA33039E156F25278B86A0F7B641
telfhash t192d0c2b3866004d833ca940cc4ee3fa55bf8b6390f45a08688912d9b0442418b039813
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 :
61
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

Result
Verdict:
Malware
Maliciousness:
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
gafgyt masquerade mirai rust
Link:
https://www.filescan.io/uploads/6961a47307ef5fa68e83687f/reports/b7745d0e-eb05-4a7e-9c48-45bd5ab03076/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-09T18:24:00Z UTC
Last seen:
2026-01-11T10:21:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Mirai.b HEUR:Backdoor.Linux.Gafgyt.ij HEUR:Backdoor.Linux.Gafgyt.gu
Link:
https://opentip.kaspersky.com/87833480c0097231366a873fe3c90db36d558e4a50abc998dbdaec640a463f26/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/33bdda05-a107-411e-a4c8-39a373778dbe
Behavior Graph:
Download SVG
%3 guuid=5671d871-1900-0000-4f57-6c4b050f0000 pid=3845 /usr/bin/sudo guuid=f687b173-1900-0000-4f57-6c4b0d0f0000 pid=3853 /tmp/sample.bin guuid=5671d871-1900-0000-4f57-6c4b050f0000 pid=3845->guuid=f687b173-1900-0000-4f57-6c4b0d0f0000 pid=3853 execve
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/311ae0eb-2766-4b11-a2a5-32f0a58b447e
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1847747
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 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 dnsIp2 2 Behavior Graph ID: 1847747 Sample: arm5.kok.elf Startdate: 10/01/2026 Architecture: LINUX Score: 100 96 91.92.241.12, 48154, 6969 THEZONEBG Bulgaria 2->96 98 91.108.9.227, 32000 TELEGRAMRU United Kingdom 2->98 100 18 other IPs or domains 2->100 102 Multi AV Scanner detection for submitted file 2->102 11 arm5.kok.elf 2->11         started        signatures3 process4 signatures5 124 Sample tries to kill multiple processes (SIGKILL) 11->124 126 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->126 14 arm5.kok.elf 11->14         started        process6 file7 88 /var/spool/cron/root, ASCII 14->88 dropped 90 /var/spool/cron/crontabs/root, ASCII 14->90 dropped 92 /root/.bashrc, ASCII 14->92 dropped 94 11 other files (10 malicious) 14->94 dropped 128 Sample tries to set files in /etc globally writable 14->128 130 Sample tries to persist itself using /etc/profile 14->130 132 Drops files in suspicious directories 14->132 134 4 other signatures 14->134 18 arm5.kok.elf sh 14->18         started        20 arm5.kok.elf sh 14->20         started        22 arm5.kok.elf sh 14->22         started        24 29 other processes 14->24 signatures8 process9 signatures10 27 sh .monitor 18->27         started        29 sh S99backup0 20->29         started        31 sh S99backup1 22->31         started        120 Sample tries to kill a massive number of system processes 24->120 122 Sample tries to kill multiple processes (SIGKILL) 24->122 33 sh S99backup2 24->33         started        35 sh S99network 24->35         started        37 sh cp 24->37         started        41 28 other processes 24->41 process11 file12 43 .monitor 27->43         started        45 S99backup0 29->45         started        47 S99backup1 31->47         started        49 S99backup2 33->49         started        51 S99network 35->51         started        78 /usr/bin/.update, ELF 37->78 dropped 106 Writes identical ELF files to multiple locations 37->106 108 Drops invisible ELF files 37->108 110 Drops files in suspicious directories 37->110 80 /var/spool/cron/crontabs/tmp.mEJgwe, ASCII 41->80 dropped 82 /var/log/.update, ELF 41->82 dropped 84 /var/jbx/shared/.update, ELF 41->84 dropped 86 /boot/.update, ELF 41->86 dropped 112 Sample deletes itself 41->112 114 Sample tries to persist itself using cron 41->114 116 Executes the "crontab" command typically for achieving persistence 41->116 118 Terminates several processes with shell command 'killall' 41->118 53 sh crontab 41->53         started        56 sh .update 41->56         started        58 sh .update 41->58         started        signatures13 process14 signatures15 68 198 other processes 43->68 60 S99backup0 .update 45->60         started        70 123 other processes 45->70 62 S99backup1 .update 47->62         started        72 117 other processes 47->72 64 S99backup2 .update 49->64         started        74 115 other processes 49->74 66 S99network .update 51->66         started        76 113 other processes 51->76 104 Executes the "crontab" command typically for achieving persistence 53->104 process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/87833480c0097231366a873fe3c90db36d558e4a50abc998dbdaec640a463f26
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/87833480c0097231366a873fe3c90db36d558e4a50abc998dbdaec640a463f26/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/87833480c0097231366a873fe3c90db36d558e4a50abc998dbdaec640a463f26
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-10 00:43:22 UTC
File Type:
ELF32 Little (Exe)
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=q6btjagabfzdcntkq476hsinwnwvldskkcv4tgg33lwgicsgh4ta._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai
Link:
https://tria.ge/reports/260110-bcbrkahz4h/
Verdict:
Malicious
Tags:
Unix.Trojan.Mirai-10001386-0
YARA:
n/a
Link:
https://app.threat.zone/submission/a9dd5454-314e-4b97-bcff-8b765f2d1f3d
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/87833480c0097231366a873fe3c90db36d558e4a50abc998dbdaec640a463f26

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_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 87833480c0097231366a873fe3c90db36d558e4a50abc998dbdaec640a463f26

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749721/
  
Delivery method
Distributed via web download

Comments