MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 40cef3cfd5467ff709f14f26fcf9e0925bf58288c2fc0cdc35e2d266f2e7af4d. 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 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 40cef3cfd5467ff709f14f26fcf9e0925bf58288c2fc0cdc35e2d266f2e7af4d
SHA3-384 hash: 0197e2418d136722bf016d406067c47df11d34bb7a331608a7464b27118c7429c9f9cbd3ce37ba63c9925cfd1b584f38
SHA1 hash: a0c0c6333981ff8aa32b53d5bd6ce1ae2a8f0ca0
MD5 hash: 7b12c15bb00ae0446527e93dbb0b4d66
humanhash: oven-undress-florida-mountain
File name:well.x86
Download: download sample
Signature Mirai
Create hunting rule
File size:104'104 bytes
First seen:2025-10-29 15:39:48 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 3072:/K7dsnOuTmZ8mCmiCUTA+xoPFrkG1grEgatiZZZZZZZZZZZZZZvsZZZZZZZZZIZg:C7SOwmZTbfU6XJeZZZZZZZZZZZZZZvsp
TLSH T15EA33BC4B693F0F5D8130578307BAB329F33F0BA612AD997D3A85933AC916019A1779D
telfhash t13941f7f51abf0cd8dbe4a451914d6f217c4dd67b24a073a205b3d834236bd4256aec39
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-dec


Avatar
abuse_ch
UPX decompressed file, sourced from SHA256 2ca4078493df1c862135eb8cd61dc7276accdf138131f5ab9afde0113cc7c8f4
File size (compressed) :41'820 bytes
File size (de-compressed) :104'104 bytes
Format:linux/i386
Packed file: 2ca4078493df1c862135eb8cd61dc7276accdf138131f5ab9afde0113cc7c8f4

Intelligence

File Origin
# of uploads :
1
# of downloads :
32
Origin country :
NL NL
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.29325.LC.Pl.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Linux.Mirai-81.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.28940.LC.UNOFFICIAL
Create hunting rule

Unix.Dropper.Mirai-7135890-0
Create hunting rule

Unix.Dropper.Mirai-7135939-0
Create hunting rule

Unix.Dropper.Mirai-7136025-0
Create hunting rule

Unix.Trojan.Mirai-9819563-0
Create hunting rule

Unix.Trojan.Mirai-9820623-0
Create hunting rule

Unix.Trojan.Mirai-9835278-0
Create hunting rule

Unix.Trojan.Mirai-9835289-0
Create hunting rule

Unix.Trojan.Mirai-9857931-0
Create hunting rule

Unix.Trojan.Mirai-9866113-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Runs as daemon
Sends data to a server
Connection attempt
Kills critical processes
Substitutes an application name
Verdict:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
lolbin masquerade remote
Link:
https://www.filescan.io/uploads/6902588ea3d16310951fcb64/reports/403e684f-ea1c-41ef-ae68-c13bde421a75/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2025-08-28T01:22:00Z UTC
Last seen:
2025-08-28T01:56:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Mirai.h HEUR:Backdoor.Linux.Mirai.ba HEUR:Backdoor.Linux.Mirai.b
Link:
https://opentip.kaspersky.com/40cef3cfd5467ff709f14f26fcf9e0925bf58288c2fc0cdc35e2d266f2e7af4d/results?tab=lookup
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/bbd2b014-52a2-45f3-b140-16fa5b9a713e
Result
Threat name:
Mirai
Create hunting rule
Detection:
malicious
Classification:
troj
Score:
72 / 100
Link:
https://www.joesandbox.com/analysis/1804531
Signature
Antivirus / Scanner detection for submitted sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected Mirai
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1804531 Sample: well.x86.elf Startdate: 29/10/2025 Architecture: LINUX Score: 72 48 5.17.173.24 ZTELECOM-ASRU Russian Federation 2->48 50 216.170.14.117 WINDSTREAMUS United States 2->50 52 99 other IPs or domains 2->52 54 Malicious sample detected (through community Yara rule) 2->54 56 Antivirus / Scanner detection for submitted sample 2->56 58 Multi AV Scanner detection for submitted file 2->58 60 Yara detected Mirai 2->60 10 dash rm well.x86.elf 2->10         started        12 dash rm 2->12         started        14 dash head 2->14         started        16 8 other processes 2->16 signatures3 process4 process5 18 well.x86.elf 10->18         started        20 well.x86.elf 10->20         started        22 well.x86.elf 10->22         started        process6 24 well.x86.elf 18->24         started        26 well.x86.elf 18->26         started        28 well.x86.elf 20->28         started        30 well.x86.elf 20->30         started        32 well.x86.elf 20->32         started        process7 34 well.x86.elf 24->34         started        36 well.x86.elf 24->36         started        38 well.x86.elf 24->38         started        40 well.x86.elf 28->40         started        42 well.x86.elf 28->42         started        process8 44 well.x86.elf 34->44         started        46 well.x86.elf 34->46         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/40cef3cfd5467ff709f14f26fcf9e0925bf58288c2fc0cdc35e2d266f2e7af4d
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/40cef3cfd5467ff709f14f26fcf9e0925bf58288c2fc0cdc35e2d266f2e7af4d/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/40cef3cfd5467ff709f14f26fcf9e0925bf58288c2fc0cdc35e2d266f2e7af4d
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2025-10-29 18:09:16 UTC
File Type:
ELF32 Little (Exe)
AV detection:
28 of 38 (73.68%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=idhpht6viz77ocprj4tpz6pasjn7lauiyl6azxbv4ljgn4xhv5gq._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai botnet:sora defense_evasion discovery linux
Link:
https://tria.ge/reports/251029-wpxvsazmal/
Behaviour
Reads runtime system information
Changes its process name
Reads system network configuration
Enumerates active TCP sockets
Enumerates running processes
Modifies Watchdog functionality
Contacts a large (48468) amount of remote hosts
Creates a large amount of network flows
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:botnet_Yakuza
Create hunting rule
Author:NDA0E
Description:Yakuza botnet
Rule name:linux_generic_ipv6_catcher
Create hunting rule
Author:@_lubiedo
Description:ELF samples using IPv6 addresses
Rule name:Linux_Trojan_Gafgyt_28a2fe0c
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_ea92cca8
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_389ee3e9
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_5f7b67b8
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_88de437f
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_8aa7b5d3
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_ae9d0fa6
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_b14f4c5d
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_cc93863b
Create hunting rule
Author:Elastic Security

File information

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

Web download

Mirai

elf 2ca4078493df1c862135eb8cd61dc7276accdf138131f5ab9afde0113cc7c8f4

Mirai

elf 40cef3cfd5467ff709f14f26fcf9e0925bf58288c2fc0cdc35e2d266f2e7af4d

(this sample)

  
Dropped by
SHA256 2ca4078493df1c862135eb8cd61dc7276accdf138131f5ab9afde0113cc7c8f4
  
URLhaus
https://urlhaus.abuse.ch/url/3612690/
  
Delivery method
Distributed via web download

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