MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3bab1e4be915a7920afe13c50846b43e1491cb18042e19e0e1eafc50ea17c63. 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: b3bab1e4be915a7920afe13c50846b43e1491cb18042e19e0e1eafc50ea17c63
SHA3-384 hash: c19033dc66eb10525c3b53c7d75520c52407f23ecf924841ce2c475923beba633389cd7a45c9c1d0b64165bb81e81ea9
SHA1 hash: 987e7a499d89db4b60f76377b7f5d2e00570568b
MD5 hash: 5b04336cbb09e0a1c5c9b68d39386d6f
humanhash: friend-pennsylvania-red-skylark
File name:arm5.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:107'732 bytes
First seen:2026-01-12 19:31:01 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:opT09LIbKIkUz9Gi1Oxjg1LV6bDxP+FDjwHLamwd/j/OXs82zuQQauGQNJiAbaTm:C09LgKWKxggJPV+mwdAaLo9
TLSH T13AB34B92FDC1E612C6C52577FB2E428C371753B8C2EA72039E256B31378A56A0F7B641
telfhash t186d02be3e67021de6bc6109442eeb772a5d8f97b4f40504542e4be8b41d3507700ad13
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 :
78
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/69654c0fc82deb762e7a4066/reports/4c1145f2-cfa0-456b-b9fe-3426fac4ad4e/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-12T15:07:00Z UTC
Last seen:
2026-01-12T19:02:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Mirai.b HEUR:Backdoor.Linux.Gafgyt.ij HEUR:Backdoor.Linux.Gafgyt.gu
Link:
https://opentip.kaspersky.com/b3bab1e4be915a7920afe13c50846b43e1491cb18042e19e0e1eafc50ea17c63/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/ed3d5cdf-2975-4ace-b510-ab2219ddd961
Behavior Graph:
Download SVG
%3 guuid=fa744d0f-1b00-0000-4e73-3d5e9d0b0000 pid=2973 /usr/bin/sudo guuid=72a95811-1b00-0000-4e73-3d5e9f0b0000 pid=2975 /tmp/sample.bin guuid=fa744d0f-1b00-0000-4e73-3d5e9d0b0000 pid=2973->guuid=72a95811-1b00-0000-4e73-3d5e9f0b0000 pid=2975 execve
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/03082d40-dad7-45a7-8eea-d6c9b8327b18
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1849482
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 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'
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: 1849482 Sample: arm5.kok.elf Startdate: 12/01/2026 Architecture: LINUX Score: 100 94 144.126.148.148, 11907, 12046, 12491 LOYOLAUS United States 2->94 96 41.56.230.142, 6948 rainZA South Africa 2->96 98 24 other IPs or domains 2->98 100 Multi AV Scanner detection for submitted file 2->100 102 Connects to many ports of the same IP (likely port scanning) 2->102 104 Uses known network protocols on non-standard ports 2->104 11 arm5.kok.elf 2->11         started        signatures3 process4 signatures5 126 Sample tries to kill multiple processes (SIGKILL) 11->126 128 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->128 14 arm5.kok.elf 11->14         started        process6 file7 86 /var/spool/cron/root, ASCII 14->86 dropped 88 /var/spool/cron/crontabs/root, ASCII 14->88 dropped 90 /root/.bashrc, ASCII 14->90 dropped 92 11 other files (10 malicious) 14->92 dropped 130 Sample tries to set files in /etc globally writable 14->130 132 Sample tries to persist itself using /etc/profile 14->132 134 Drops files in suspicious directories 14->134 136 4 other signatures 14->136 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 50 other processes 14->24 signatures8 process9 signatures10 27 sh S99backup0 18->27         started        29 sh S99backup1 20->29         started        31 sh S99backup2 22->31         started        122 Sample tries to kill a massive number of system processes 24->122 124 Sample tries to kill multiple processes (SIGKILL) 24->124 33 sh S99network 24->33         started        35 sh cp 24->35         started        39 sh crontab 24->39         started        41 48 other processes 24->41 process11 file12 43 S99backup0 27->43         started        45 S99backup1 29->45         started        47 S99backup2 31->47         started        49 S99network 33->49         started        76 /usr/bin/.update, ELF 35->76 dropped 108 Writes identical ELF files to multiple locations 35->108 110 Drops invisible ELF files 35->110 112 Drops files in suspicious directories 35->112 78 /var/spool/cron/crontabs/tmp.Fgk189, ASCII 39->78 dropped 114 Sample tries to persist itself using cron 39->114 116 Executes the "crontab" command typically for achieving persistence 39->116 80 /var/log/.update, ELF 41->80 dropped 82 /var/jbx/shared/.update, ELF 41->82 dropped 84 /boot/.update, ELF 41->84 dropped 118 Sample deletes itself 41->118 120 Terminates several processes with shell command 'killall' 41->120 51 sh crontab 41->51         started        54 .monitor 41->54         started        56 sh .update 41->56         started        signatures13 process14 signatures15 58 S99backup0 .update 43->58         started        66 181 other processes 43->66 60 S99backup1 .update 45->60         started        68 175 other processes 45->68 62 S99backup2 .update 47->62         started        70 175 other processes 47->70 64 S99network .update 49->64         started        72 169 other processes 49->72 106 Executes the "crontab" command typically for achieving persistence 51->106 74 2 other processes 54->74 process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b3bab1e4be915a7920afe13c50846b43e1491cb18042e19e0e1eafc50ea17c63
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b3bab1e4be915a7920afe13c50846b43e1491cb18042e19e0e1eafc50ea17c63/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/b3bab1e4be915a7920afe13c50846b43e1491cb18042e19e0e1eafc50ea17c63
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-12 19:32:17 UTC
File Type:
ELF32 Little (Exe)
AV detection:
19 of 38 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wo5ldzf6sfnhsifp4e6fbbdlipqushfrqbbodhqod2x4kdvbprrq._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai
Link:
https://tria.ge/reports/260112-x8k6rscv9b/
Verdict:
Malicious
Tags:
Unix.Trojan.Mirai-10001386-0
YARA:
n/a
Link:
https://app.threat.zone/submission/584b5271-6521-464e-8e8d-00f67d2103f7
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/b3bab1e4be915a7920afe13c50846b43e1491cb18042e19e0e1eafc50ea17c63

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 b3bab1e4be915a7920afe13c50846b43e1491cb18042e19e0e1eafc50ea17c63

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749721/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3757307/

Comments