MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 153bf5ed2ff4a38d65cb481d563f1bd7d52aee97b7aaf7595bf3349a39adc573. 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 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 153bf5ed2ff4a38d65cb481d563f1bd7d52aee97b7aaf7595bf3349a39adc573
SHA3-384 hash: 2b14bb47280d2a92007eb8a7654b8f2e96b10651064e4d7cb91022c8301b4f2eb6c62e61422af65e39a02c6ec1a745c2
SHA1 hash: 87778c3c681c16b259844f4bd022148b28500e01
MD5 hash: 214c1429d7b622dc99722f9dbf00de87
humanhash: seventeen-hot-double-ceiling
File name:x86_32.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:95'220 bytes
First seen:2026-01-10 02:07:02 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:1AHp7ZwLc48EX4NqI+mdxEv7LP7bCdr6vi/LCGOuxmcfcp7MRhhQ:4WLcII+mdxo7LP7bC7z6sJkpZ
TLSH T189936BC6A657C4F8FC6602B46137F73645B2E5340129EF46CF29B936AC2A601B72B34D
telfhash t1363110fa12be08e897d46d02f10f5f717d4dab7b641037e211b38835362ba4192bac34
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 :
57
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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Deleting a recently created file
Runs as daemon
Kills processes
Opens a port
Changes access rights for a written file
Connection attempt
Launching a process
Creating a process from a recently created file
Creating a file
Sets a written file as executable
Deletes a file
Changes the time when the file was created, accessed, or modified
Writes files to system directory
Substitutes an application name
Creates or modifies files in /cron to set up autorun
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:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
gafgyt masquerade mirai
Link:
https://www.filescan.io/uploads/6961b45e30368802bb7ecefd/reports/683f957d-76ab-4e03-b826-f9c40bbfa592/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-10T00:05:00Z UTC
Last seen:
2026-01-10T00:55:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/153bf5ed2ff4a38d65cb481d563f1bd7d52aee97b7aaf7595bf3349a39adc573/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/dc4d3649-dce9-44db-aa4d-322aee66a689
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1847755
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 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: 1847755 Sample: x86_32.kok.elf Startdate: 10/01/2026 Architecture: LINUX Score: 100 102 91.92.241.12, 48156, 6969 THEZONEBG Bulgaria 2->102 104 109.202.202.202, 80 INIT7CH Switzerland 2->104 106 3 other IPs or domains 2->106 124 Malicious sample detected (through community Yara rule) 2->124 126 Multi AV Scanner detection for submitted file 2->126 11 x86_32.kok.elf 2->11         started        14 dash rm 2->14         started        16 dash rm 2->16         started        signatures3 process4 signatures5 136 Sample tries to kill multiple processes (SIGKILL) 11->136 138 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->138 18 x86_32.kok.elf 11->18         started        process6 file7 84 /var/spool/cron/root, ASCII 18->84 dropped 86 /var/spool/cron/crontabs/root, ASCII 18->86 dropped 88 /root/.bashrc, ASCII 18->88 dropped 90 11 other files (10 malicious) 18->90 dropped 128 Sample tries to set files in /etc globally writable 18->128 130 Sample tries to persist itself using /etc/profile 18->130 132 Drops files in suspicious directories 18->132 134 4 other signatures 18->134 22 x86_32.kok.elf sh 18->22         started        24 x86_32.kok.elf sh 18->24         started        26 x86_32.kok.elf sh 18->26         started        28 21 other processes 18->28 signatures8 process9 signatures10 31 sh cp 22->31         started        35 sh crontab 24->35         started        37 sh 24->37         started        39 sh cp 26->39         started        140 Sample tries to kill multiple processes (SIGKILL) 28->140 41 sh S99backup0 28->41         started        43 sh S99backup1 28->43         started        45 sh S99backup2 28->45         started        47 19 other processes 28->47 process11 file12 92 /usr/bin/.update, ELF 31->92 dropped 108 Writes identical ELF files to multiple locations 31->108 110 Drops invisible ELF files 31->110 112 Drops files in suspicious directories 31->112 94 /var/spool/cron/crontabs/tmp.bc06zx, ASCII 35->94 dropped 114 Sample tries to persist itself using cron 35->114 116 Executes the "crontab" command typically for achieving persistence 35->116 49 sh crontab 37->49         started        96 /boot/.update, ELF 39->96 dropped 52 S99backup0 41->52         started        54 S99backup1 43->54         started        56 S99backup2 45->56         started        98 /var/log/.update, ELF 47->98 dropped 100 /var/jbx/shared/.update, ELF 47->100 dropped 118 Sample deletes itself 47->118 120 Terminates several processes with shell command 'killall' 47->120 58 S99network 47->58         started        60 .monitor 47->60         started        62 sh .update 47->62         started        64 2 other processes 47->64 signatures13 process14 signatures15 122 Executes the "crontab" command typically for achieving persistence 49->122 66 S99backup0 .update 52->66         started        74 33 other processes 52->74 68 S99backup1 .update 54->68         started        76 31 other processes 54->76 70 S99backup2 .update 56->70         started        78 29 other processes 56->78 72 S99network .update 58->72         started        80 27 other processes 58->80 82 2 other processes 60->82 process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/153bf5ed2ff4a38d65cb481d563f1bd7d52aee97b7aaf7595bf3349a39adc573
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/153bf5ed2ff4a38d65cb481d563f1bd7d52aee97b7aaf7595bf3349a39adc573/
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-10 02:10:14 UTC
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=cu57l3jp6sry2zoljaovmpy327ksv3uxw6vpowk36m2juonnyvzq._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
defense_evasion discovery execution linux persistence privilege_escalation
Link:
https://tria.ge/reports/260110-cj9slsa17g/
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
Modifies init.d
Modifies rc script
Write file to user bin folder
Executes dropped EXE
Verdict:
Malicious
Tags:
trojan mirai gafgyt Unix.Trojan.Mirai-10001386-0
YARA:
Linux_Trojan_Gafgyt_5bf62ce4 Linux_Trojan_Mirai_b14f4c5d Linux_Trojan_Mirai_5f7b67b8 Linux_Trojan_Mirai_ae9d0fa6 Linux_Trojan_Mirai_cc93863b
Link:
https://app.threat.zone/submission/d3327bf6-7620-4fb6-8763-c85f1ff6c513
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/153bf5ed2ff4a38d65cb481d563f1bd7d52aee97b7aaf7595bf3349a39adc573

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_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_b14f4c5d
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_cc93863b
Create hunting rule
Author:Elastic Security
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
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 153bf5ed2ff4a38d65cb481d563f1bd7d52aee97b7aaf7595bf3349a39adc573

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749717/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3749760/

Comments