MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7a3054b7a2c1da818105dc6f419673181fffcfecac8d799e985118f1d312c43d. 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 9 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7a3054b7a2c1da818105dc6f419673181fffcfecac8d799e985118f1d312c43d
SHA3-384 hash: da75fa0d57569b1d679a6a367f30ffbc74d8f8f9f6d61393af710a77ad58956d3dec4f010882605dda9dbd7b13a7b1dc
SHA1 hash: bf76080bae85b77f7aa5346efef08319de632898
MD5 hash: 522b75b43ac316881737271ee7caf309
humanhash: monkey-minnesota-angel-blue
File name:x86_32.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:161'652 bytes
First seen:2026-01-09 19:53:12 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 3072:vNvkhLXLn+MtSYYiWw7GBHfKZM/lP/WODEwgeoVos+JA:VvkxXLnLYKytfKalP/YwBA
TLSH T183F36D86E787C5F2F81906B46077F73709B1E93D102BDA95DB75E931AC21502E62B32C
telfhash t131518cf22a6667ad73d49a02c20b3a10ee1ed077244439a606b225d432f7e427765cbe
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 :
55
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
Sanesecurity.Malware.29052.TSource.UNOFFICIAL
Create hunting rule

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:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
base64 fingerprint masquerade
Link:
https://www.filescan.io/uploads/69615cc330368802bb7e656d/reports/0c7c381a-7485-4528-98b8-543b6ecf6185/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-10T20:21:00Z UTC
Last seen:
2026-01-10T20:51:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/7a3054b7a2c1da818105dc6f419673181fffcfecac8d799e985118f1d312c43d/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/5bb6b6d1-3e09-4127-ae9c-80e238b6fef5
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1847609
Signature
Drops files in suspicious directories
Drops invisible ELF files
Executes the "crontab" command typically for achieving persistence
Malicious sample detected (through community Yara rule)
Modifies the '.bashrc' or '.bash_profile' file typically for persisting actions
Multi AV Scanner detection for submitted file
Sample deletes itself
Sample pipes script to sh (AV evasion)
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 signatures2 2 Behavior Graph ID: 1847609 Sample: x86_32.kok.elf Startdate: 09/01/2026 Architecture: LINUX Score: 100 105 Malicious sample detected (through community Yara rule) 2->105 107 Multi AV Scanner detection for submitted file 2->107 109 Sample pipes script to sh (AV evasion) 2->109 10 x86_32.kok.elf 2->10         started        13 udisksd dumpe2fs 2->13         started        15 udisksd dumpe2fs 2->15         started        17 62 other processes 2->17 process3 signatures4 137 Sample tries to kill multiple processes (SIGKILL) 10->137 139 Sample reads /proc/mounts (often used for finding a writable filesystem) 10->139 19 x86_32.kok.elf 10->19         started        process5 file6 97 /var/tmp/.monitor, POSIX 19->97 dropped 99 /var/spool/cron/root, ASCII 19->99 dropped 101 /var/spool/cron/crontabs/root, ASCII 19->101 dropped 103 11 other malicious files 19->103 dropped 127 Sample tries to set files in /etc globally writable 19->127 129 Sample tries to persist itself using /etc/profile 19->129 131 Drops files in suspicious directories 19->131 133 3 other signatures 19->133 23 x86_32.kok.elf sh 19->23         started        25 x86_32.kok.elf sh 19->25         started        27 x86_32.kok.elf sh 19->27         started        29 99 other processes 19->29 signatures7 process8 signatures9 32 sh .monitor 23->32         started        34 sh cp 25->34         started        38 sh crontab 27->38         started        40 sh 27->40         started        141 Sample tries to kill multiple processes (SIGKILL) 29->141 42 sh S99backup0 29->42         started        44 sh S99backup1 29->44         started        46 sh S99backup2 29->46         started        48 97 other processes 29->48 process10 file11 50 .monitor 32->50         started        87 /usr/bin/.update, ELF 34->87 dropped 111 Writes identical ELF files to multiple locations 34->111 113 Drops invisible ELF files 34->113 115 Drops files in suspicious directories 34->115 89 /var/spool/cron/crontabs/tmp.4spEI8, ASCII 38->89 dropped 117 Sample tries to persist itself using cron 38->117 119 Executes the "crontab" command typically for achieving persistence 38->119 52 sh crontab 40->52         started        55 S99backup0 42->55         started        57 S99backup1 44->57         started        59 S99backup2 46->59         started        91 /var/log/.update, ELF 48->91 dropped 93 /var/.update, ELF 48->93 dropped 95 /mnt/.update, ELF 48->95 dropped 121 Sample tries to kill multiple processes (SIGKILL) 48->121 123 Sample deletes itself 48->123 125 Terminates several processes with shell command 'killall' 48->125 61 S99network 48->61         started        63 sh .update 48->63         started        65 sh .update 48->65         started        67 2 other processes 48->67 signatures12 process13 signatures14 77 76 other processes 50->77 135 Executes the "crontab" command typically for achieving persistence 52->135 69 S99backup0 .update 55->69         started        79 21 other processes 55->79 71 S99backup1 .update 57->71         started        81 21 other processes 57->81 73 S99backup2 .update 59->73         started        83 21 other processes 59->83 75 S99network .update 61->75         started        85 21 other processes 61->85 process15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/7a3054b7a2c1da818105dc6f419673181fffcfecac8d799e985118f1d312c43d
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/7a3054b7a2c1da818105dc6f419673181fffcfecac8d799e985118f1d312c43d/
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-09 19:53:37 UTC
File Type:
ELF32 Little (Exe)
AV detection:
12 of 24 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=piyfjn5cyhnidaif3rxudfttdap77t7mvsgxthuykempduysyq6q._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai defense_evasion discovery execution linux persistence privilege_escalation
Link:
https://tria.ge/reports/260109-yl8h8agv4h/
Behaviour
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
Looks up external IP address via web service
Modifies init.d
Modifies rc script
Write file to user bin folder
Executes dropped EXE
Unexpected DNS network traffic destination
Verdict:
Malicious
Tags:
trojan mirai gafgyt Unix.Trojan.Mirai-10001386-0
YARA:
Linux_Trojan_Gafgyt_5bf62ce4 Linux_Trojan_Mirai_5f7b67b8 Linux_Trojan_Mirai_ae9d0fa6 Linux_Trojan_Mirai_cc93863b
Link:
https://app.threat.zone/submission/f3f9928e-355f-4858-991d-8450498edf29
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.73
Link:
https://yomi.yoroi.company/submissions/7a3054b7a2c1da818105dc6f419673181fffcfecac8d799e985118f1d312c43d

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_Trojan_Gafgyt_5bf62ce4
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_5f7b67b8
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_ae9d0fa6
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_cc93863b
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 7a3054b7a2c1da818105dc6f419673181fffcfecac8d799e985118f1d312c43d

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749717/
  
Delivery method
Distributed via web download

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