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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8b18851bcddc710ef0849fa8230e28c815b6d59081b3b786568b7bc0eef773f1. 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: 10


Intelligence 10 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8b18851bcddc710ef0849fa8230e28c815b6d59081b3b786568b7bc0eef773f1
SHA3-384 hash: 4cc1b55caaf75c307ffedd699f14da8cfe9cafbec5ac8a14e277f1bbe13d3bceb0da11abf23bf72d2ad91966ff7904e1
SHA1 hash: 33b95c553635ec09f2e0fb6243137b9275a8289d
MD5 hash: 831fe481886b35b4d439e8a8f757f2f2
humanhash: india-missouri-uncle-yellow
File name:putita.arm7
Download: download sample
Signature Mirai
Create hunting rule
File size:64'376 bytes
First seen:2026-08-25 21:46:41 UTC
Last seen:Never
File type: elf
MIME type:application/x-sharedlib
ssdeep 1536:Ez6Cue95tYc3K3yTtA3JieGtfz7UttOiwif/AjLXUqBexOtFSb2ufX:y0iv6iTtCihfzbMg/OEtuP
TLSH T15953026D13065AA8F9F631F8A875C0124A4E1FF497BEFA25715B5BBC65B20C2362C248
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 UPX
File size (compressed) :64'376 bytes
File size (de-compressed) :132'744 bytes
Format:linux/arm
Unpacked file: b5de902c316598edaf6ee7592468afcf53cd73733e3f9b10996c9dedc0a3b5f7

Intelligence

File Origin
# of uploads :
1
# of downloads :
44
Origin country :
DE DE
Vendor Threat Intelligence
Details
Link:
https://research.acce.ciphertechsolutions.com/results/c3ffcaa2-a196-4f4f-ab1e-76d426e3e74b/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Opens a port
Changes the time when the file was created, accessed, or modified
Changes access rights for a written file
Launching a process
Connection attempt
Sets a written file as executable
Runs as daemon
Creates or modifies symbolic links
Creating a file
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Writes files to system directory
Deleting of the original file
Creates or modifies files in /init.d to set up autorun
Creates or modifies symbolic links in /init.d to set up autorun
Creates or modifies files to set up autorun
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
masquerade packed upx
Link:
https://www.filescan.io/uploads/6a8e0d609839b38da0d5eddd/reports/e1d8a1c0-08ca-4567-ace1-70a96718c530/overview
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
arm
Packer:
UPX
Botnet:
unknown
Number of open files:
3
Number of processes launched:
4
Processes remaning?
true
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/8b18851bcddc710ef0849fa8230e28c815b6d59081b3b786568b7bc0eef773f1
Behaviour
Process Renaming
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-08-25T19:22:00Z UTC
Last seen:
2026-08-27T00:44:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/8b18851bcddc710ef0849fa8230e28c815b6d59081b3b786568b7bc0eef773f1/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/49a596f5-4078-426a-91c0-e30e78b6e7fb
Behavior Graph:
Download SVG
%3 guuid=f1c4ae31-1900-0000-77fe-1e1869090000 pid=2409 /usr/bin/sudo guuid=aa51e233-1900-0000-77fe-1e1870090000 pid=2416 /tmp/sample.bin guuid=f1c4ae31-1900-0000-77fe-1e1869090000 pid=2409->guuid=aa51e233-1900-0000-77fe-1e1870090000 pid=2416 execve
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/def05ad8-45ce-46f4-a5bc-15453879c887
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1963741
Signature
Drops files in suspicious directories
Executes the "crontab" command typically for achieving persistence
Modifies the '.bashrc' or '.bash_profile' file typically for persisting actions
Protects files from modification
Sample deletes itself
Sample is packed with UPX
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
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1963741 Sample: putita.arm7.elf Startdate: 25/08/2026 Architecture: LINUX Score: 80 53 176.65.139.232, 10309, 10750, 10924 STORMINDUSTRIESHostingServicesUS Netherlands 2->53 55 64.89.163.215, 33758, 666 NETIFACE-TORONTO-NetifaceAmericaIncUS Germany 2->55 59 Sample is packed with UPX 2->59 9 putita.arm7.elf 2->9         started        signatures3 process4 file5 45 /usr/lib/kworker-helper, ELF 9->45 dropped 47 /root/.bashrc, ASCII 9->47 dropped 49 /etc/systemd/system/kworker-helper.service, ASCII 9->49 dropped 51 3 other malicious files 9->51 dropped 67 Sample tries to set files in /etc globally writable 9->67 69 Sample tries to persist itself using /etc/profile 9->69 71 Drops files in suspicious directories 9->71 73 3 other signatures 9->73 13 putita.arm7.elf sh 9->13         started        15 putita.arm7.elf sh 9->15         started        17 putita.arm7.elf chattr 9->17         started        20 6 other processes 9->20 signatures6 process7 signatures8 22 sh crontab 13->22         started        26 sh 13->26         started        28 sh crontab 15->28         started        57 Protects files from modification 17->57 30 putita.arm7.elf 20->30         started        32 putita.arm7.elf 20->32         started        34 putita.arm7.elf 20->34         started        36 putita.arm7.elf 20->36         started        process9 file10 43 /var/spool/cron/crontabs/tmp.1KE4q0, ASCII 22->43 dropped 63 Sample tries to persist itself using cron 22->63 65 Executes the "crontab" command typically for achieving persistence 22->65 38 sh crontab 26->38         started        41 putita.arm7.elf 30->41         started        signatures11 process12 signatures13 61 Executes the "crontab" command typically for achieving persistence 38->61
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/8b18851bcddc710ef0849fa8230e28c815b6d59081b3b786568b7bc0eef773f1
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8b18851bcddc710ef0849fa8230e28c815b6d59081b3b786568b7bc0eef773f1/
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-08-25 21:47:17 UTC
File Type:
ELF32 Little (SO)
AV detection:
12 of 24 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rmmikg6n3ryq54eet6ucgdrizak3nvmqqgz3pbswrn54b3xxopyq._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
defense_evasion discovery execution persistence privilege_escalation upx
Link:
https://tria.ge/reports/260825-1m95jsep4y/
Behaviour
Reads runtime system information
Changes its process name
Modifies Bash startup script
UPX packed file
Creates/modifies Cron job
Creates/modifies environment variables
Modifies init.d
Modifies rc script
Modifies systemd
Deletes itself
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/8b18851bcddc710ef0849fa8230e28c815b6d59081b3b786568b7bc0eef773f1

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:elf_arm_mips_ko_so
Create hunting rule
Rule name:ELF_IoT_DVR_Botnet_Hama_UPX
Create hunting rule
Author:Serhii Kocherhan
Description:Detects packed and unpacked ELF IoT/DVR botnet variants targeting UPX compression structures and uncompressed code
Rule name:SUSP_ELF_LNX_UPX_Compressed_File
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects a suspicious ELF binary with UPX compression
Reference:Internal Research
Rule name:unixredflags3
Create hunting rule
Author:Tim Brown @timb_machine
Description:Hunts for UNIX red flags
Rule name:upx_packed_elf_v1
Create hunting rule
Author:RandomMalware

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

Mirai

elf 8b18851bcddc710ef0849fa8230e28c815b6d59081b3b786568b7bc0eef773f1

(this sample)

Mirai

elf b5de902c316598edaf6ee7592468afcf53cd73733e3f9b10996c9dedc0a3b5f7

  
URLhaus
https://urlhaus.abuse.ch/url/3892127/
  
Delivery method
Distributed via web download
  
Dropping
SHA256 b5de902c316598edaf6ee7592468afcf53cd73733e3f9b10996c9dedc0a3b5f7
  
Dropping
MD5 5eac859771660c6a1390a6a0575f73eb
  
URLhaus
https://urlhaus.abuse.ch/url/3885281/
  
URLhaus
https://urlhaus.abuse.ch/url/3892135/

Comments