MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3b99bb56b17beb0ba362bb542310110db9d7b3dfd88f376562343a6f6b7b4f0. 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: 12


Intelligence 12 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b3b99bb56b17beb0ba362bb542310110db9d7b3dfd88f376562343a6f6b7b4f0
SHA3-384 hash: d6d263d7eccc861c07f4b803915813e31f41c5fe9a55958d55300436e9851c3c9646bd5d4f0e3c5edec593696f7b08ca
SHA1 hash: b62431c65ec68c777d352c1084fefac9e274514f
MD5 hash: fe67ffe4065bd997dfcf908a8acd4696
humanhash: green-kentucky-virginia-muppet
File name:arm7.uhavenobotsxd
Download: download sample
Signature Mirai
Create hunting rule
File size:131'880 bytes
First seen:2026-01-02 07:26:38 UTC
Last seen:2026-01-02 12:15:32 UTC
File type: elf
MIME type:application/x-executable
ssdeep 3072:Mg+BSXqyJfteDwaPQ9NpLPvZdRmxrbzNgWtp+:MguSXttawaPQ9NpLPxdR2zGWtp+
TLSH T1C0D32956B9519F11D4C721FAFB5E414933136FF8D3FA71029D20AF61238A99B0FBA602
telfhash t155e02252e904018d17f0161562ca62324bac358d8a2029ad9cfc232b83d3dd5b01b903
Magika elf
Reporter abuse_ch
Tags:elf mirai

Intelligence

File Origin
# of uploads :
2
# of downloads :
41
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:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
gafgyt gcc mirai rust
Link:
https://www.filescan.io/uploads/6957734f8d1aa9829e28dc32/reports/686c0dd6-4dda-4c7a-8c8d-c9b7b942f5d6/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-02T03:40:00Z UTC
Last seen:
2026-01-02T23:55:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Gafgyt.ij HEUR:Backdoor.Linux.Gafgyt.gu HEUR:Backdoor.Linux.Mirai.b
Link:
https://opentip.kaspersky.com/b3b99bb56b17beb0ba362bb542310110db9d7b3dfd88f376562343a6f6b7b4f0/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/3032d0a8-89d0-475f-919e-3069900a6cc2
Behavior Graph:
Download SVG
%3 guuid=7b717c38-1800-0000-af1a-3676e20d0000 pid=3554 /usr/bin/sudo guuid=bf34453a-1800-0000-af1a-3676e70d0000 pid=3559 /tmp/sample.bin guuid=7b717c38-1800-0000-af1a-3676e20d0000 pid=3554->guuid=bf34453a-1800-0000-af1a-3676e70d0000 pid=3559 execve
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/2957443c-a97f-4baf-b8da-63172be73c19
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1843500
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 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: 1843500 Sample: arm7.uhavenobotsxd.elf Startdate: 02/01/2026 Architecture: LINUX Score: 100 90 103.248.152.197, 1883 TULLETTPREBON-AS-SG-APTullettPrebonSingaporemultihomingI China 2->90 92 103.92.25.133, 15779 TLSOFT-AS-VN8Floor96-98DaoDuyAnhPhuNhuanHCMCVN Viet Nam 2->92 94 8 other IPs or domains 2->94 96 Multi AV Scanner detection for submitted file 2->96 11 arm7.uhavenobotsxd.elf 2->11         started        signatures3 process4 signatures5 100 Sample tries to kill multiple processes (SIGKILL) 11->100 102 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->102 14 arm7.uhavenobotsxd.elf 11->14         started        process6 file7 82 /var/spool/cron/root, ASCII 14->82 dropped 84 /var/spool/cron/crontabs/root, ASCII 14->84 dropped 86 /root/.bashrc, ASCII 14->86 dropped 88 7 other files (6 malicious) 14->88 dropped 118 Sample tries to set files in /etc globally writable 14->118 120 Sample tries to persist itself using /etc/profile 14->120 122 Drops files in suspicious directories 14->122 124 4 other signatures 14->124 18 arm7.uhavenobotsxd.elf sh 14->18         started        20 arm7.uhavenobotsxd.elf sh 14->20         started        22 arm7.uhavenobotsxd.elf sh 14->22         started        24 49 other processes 14->24 signatures8 process9 signatures10 27 sh cp 18->27         started        31 sh S99network 20->31         started        33 sh crontab 22->33         started        35 sh 22->35         started        98 Sample tries to kill multiple processes (SIGKILL) 24->98 37 sh cp 24->37         started        39 sh cp 24->39         started        41 sh cp 24->41         started        43 47 other processes 24->43 process11 file12 64 /usr/bin/.update, ELF 27->64 dropped 104 Writes identical ELF files to multiple locations 27->104 106 Drops invisible ELF files 27->106 108 Drops files in suspicious directories 27->108 45 S99network 31->45         started        66 /var/spool/cron/crontabs/tmp.Tty9tw, ASCII 33->66 dropped 110 Sample tries to persist itself using cron 33->110 112 Executes the "crontab" command typically for achieving persistence 33->112 47 sh crontab 35->47         started        68 /var/jbx/shared/.update, ELF 37->68 dropped 70 /var/log/.update, ELF 39->70 dropped 72 /var/.update, ELF 41->72 dropped 74 /root/.update, ELF 43->74 dropped 76 /mnt/.update, ELF 43->76 dropped 78 /media/.update, ELF 43->78 dropped 80 2 other malicious files 43->80 dropped 114 Sample deletes itself 43->114 116 Terminates several processes with shell command 'killall' 43->116 50 .monitor 43->50         started        signatures13 process14 signatures15 52 S99network arm7.uhavenobotsxd.elf 45->52         started        54 S99network arm7.uhavenobotsxd.elf 45->54         started        56 S99network arm7.uhavenobotsxd.elf 45->56         started        62 43 other processes 45->62 126 Executes the "crontab" command typically for achieving persistence 47->126 58 .monitor arm7.uhavenobotsxd.elf 50->58         started        60 .monitor sleep 50->60         started        process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b3b99bb56b17beb0ba362bb542310110db9d7b3dfd88f376562343a6f6b7b4f0
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b3b99bb56b17beb0ba362bb542310110db9d7b3dfd88f376562343a6f6b7b4f0/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/b3b99bb56b17beb0ba362bb542310110db9d7b3dfd88f376562343a6f6b7b4f0
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-02 07:27:14 UTC
File Type:
ELF32 Little (Exe)
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wo4zxnllc67lborwfo2uemibcdnz26z57wepg5swenb2n5vxwtya._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/260102-jaaeqadq4x/
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/modifies Cron job
Creates/modifies environment variables
Deletes log files
Enumerates running processes
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/4a557c4d-119d-46cf-8750-bb18fc250025
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.64
Link:
https://yomi.yoroi.company/submissions/b3b99bb56b17beb0ba362bb542310110db9d7b3dfd88f376562343a6f6b7b4f0

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 b3b99bb56b17beb0ba362bb542310110db9d7b3dfd88f376562343a6f6b7b4f0

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3686384/
  
Delivery method
Distributed via web download

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