MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2ffa20a4410cb81c8baafac760f9e3001cb01508ef096eedd6a6994db9c60cba. 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 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2ffa20a4410cb81c8baafac760f9e3001cb01508ef096eedd6a6994db9c60cba
SHA3-384 hash: 8d888b25a405c34ff3cad63a54a0794ad577d25c22ae7e19e0ae525fe2b27f79907c79a29add0df91bd624f142f866bd
SHA1 hash: f377720bfd312853da10267351e6e6a7f4d7e5e7
MD5 hash: 0d9e62872363f98d0f6e6f67e0d28b65
humanhash: red-iowa-steak-july
File name:arm.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:111'828 bytes
First seen:2026-01-13 20:24:15 UTC
Last seen:2026-01-14 20:21:25 UTC
File type: elf
MIME type:application/x-executable
ssdeep 1536:GeXTjDtlmAA6ZJWbLDF8moOlxtl/pDZCJDjweguQwm9jWOI4cMbhbAhtRvX/O3X:GeXDbm2WbV2YjZclQwc3z+C
TLSH T100B32B92FD41EA12C6C661B7FB1E428C372707B8D3EA73039D166B21278B56A0F7B541
telfhash t18001dc72db482ddd27d8848544fef3011bf8a1b92b5420a670b4b68c85928d5701c83e
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 :
3
# of downloads :
72
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:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
masquerade mirai rust
Link:
https://www.filescan.io/uploads/6966a9f232bf4f14bb109bc6/reports/6236632d-7bc6-4f2b-bcbb-081646d78367/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-13T17:33:00Z UTC
Last seen:
2026-01-15T07:26:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Mirai.b HEUR:Backdoor.Linux.Gafgyt.ij HEUR:Backdoor.Linux.Gafgyt.gu
Link:
https://opentip.kaspersky.com/2ffa20a4410cb81c8baafac760f9e3001cb01508ef096eedd6a6994db9c60cba/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/137d7a82-af19-4c70-a4ea-8b3357e40774
Behavior Graph:
Download SVG
%3 guuid=45bb5544-1900-0000-6b32-96a1360b0000 pid=2870 /usr/bin/sudo guuid=e3ce8746-1900-0000-6b32-96a13e0b0000 pid=2878 /tmp/sample.bin guuid=45bb5544-1900-0000-6b32-96a1360b0000 pid=2870->guuid=e3ce8746-1900-0000-6b32-96a13e0b0000 pid=2878 execve
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/5bd9ead4-b2ad-482c-814d-2cdee0616c05
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1850193
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 a massive number of system processes
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: 1850193 Sample: arm.kok.elf Startdate: 13/01/2026 Architecture: LINUX Score: 100 102 91.92.241.12, 48150, 6969 THEZONEBG Bulgaria 2->102 104 109.202.202.202, 80 INIT7CH Switzerland 2->104 106 3 other IPs or domains 2->106 122 Multi AV Scanner detection for submitted file 2->122 11 arm.kok.elf 2->11         started        14 dash rm 2->14         started        16 dash rm 2->16         started        signatures3 process4 signatures5 134 Sample tries to kill multiple processes (SIGKILL) 11->134 136 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->136 18 arm.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 124 Sample tries to set files in /etc globally writable 18->124 126 Sample tries to persist itself using /etc/profile 18->126 128 Drops files in suspicious directories 18->128 130 4 other signatures 18->130 22 arm.kok.elf sh 18->22         started        24 arm.kok.elf sh 18->24         started        26 arm.kok.elf sh 18->26         started        28 21 other processes 18->28 signatures8 process9 signatures10 31 sh cp 22->31         started        35 sh .monitor 24->35         started        37 sh S99backup0 26->37         started        138 Sample tries to kill a massive number of system processes 28->138 140 Sample tries to kill multiple processes (SIGKILL) 28->140 39 sh S99backup1 28->39         started        41 sh S99backup2 28->41         started        43 sh S99network 28->43         started        45 20 other processes 28->45 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 47 .monitor 35->47         started        49 S99backup0 37->49         started        51 S99backup1 39->51         started        53 S99backup2 41->53         started        55 S99network 43->55         started        94 /var/spool/cron/crontabs/tmp.9rrnTH, ASCII 45->94 dropped 96 /var/log/.update, ELF 45->96 dropped 98 /var/jbx/shared/.update, ELF 45->98 dropped 100 /boot/.update, ELF 45->100 dropped 114 Sample deletes itself 45->114 116 Sample tries to persist itself using cron 45->116 118 Executes the "crontab" command typically for achieving persistence 45->118 120 Terminates several processes with shell command 'killall' 45->120 57 sh crontab 45->57         started        60 sh .update 45->60         started        62 sh .update 45->62         started        64 sh .update 45->64         started        signatures13 process14 signatures15 74 48 other processes 47->74 66 S99backup0 .update 49->66         started        76 43 other processes 49->76 68 S99backup1 .update 51->68         started        78 35 other processes 51->78 70 S99backup2 .update 53->70         started        80 35 other processes 53->80 72 S99network .update 55->72         started        82 33 other processes 55->82 132 Executes the "crontab" command typically for achieving persistence 57->132 process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/2ffa20a4410cb81c8baafac760f9e3001cb01508ef096eedd6a6994db9c60cba
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2ffa20a4410cb81c8baafac760f9e3001cb01508ef096eedd6a6994db9c60cba/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/2ffa20a4410cb81c8baafac760f9e3001cb01508ef096eedd6a6994db9c60cba
Threat name:
Linux.Trojan.Multiverze
Create hunting rule
Status:
Malicious
First seen:
2026-01-13 20:25:36 UTC
File Type:
ELF32 Little (Exe)
AV detection:
18 of 38 (47.37%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=f75cbjcbbs4bzc5k7ldwb6pdaaolafii54ew53owu2mu3oogbs5a._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai
Link:
https://tria.ge/reports/260113-y627yahz8h/
Verdict:
Malicious
Tags:
Unix.Trojan.Mirai-10001386-0
YARA:
n/a
Link:
https://app.threat.zone/submission/05902340-2e6c-47e3-94cd-1eef4a5d56e5
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: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_Generic_Threat_d94e1020
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 2ffa20a4410cb81c8baafac760f9e3001cb01508ef096eedd6a6994db9c60cba

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749723/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3757302/

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