MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ff4abf773e3047ea1a94dbb4d2a7032a9dccc7a396cad04511d991c66dc37448. 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: 12


Intelligence 12 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ff4abf773e3047ea1a94dbb4d2a7032a9dccc7a396cad04511d991c66dc37448
SHA3-384 hash: ba899bfa01470be3b3d8a1e0bf3a506ba02bd6ef0ce88879449a445bde6e6d9fed0af8b37bfc3ec2745a0e32f60056c5
SHA1 hash: 1307cb6016fec55253d6aedd504594c1f93305c0
MD5 hash: 2a06e96527bb154e35543b73ac339e47
humanhash: thirteen-rugby-yankee-august
File name:arm5.kok
Download: download sample
Signature Mirai
Create hunting rule
File size:107'732 bytes
First seen:2026-01-11 01:31:27 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:1CZrp5I4oi7UG11dqXdJKSSnngLW7NDjwDajQZtvjZOHcIs/UEC4vy5KiX76TX:1CZrpS4PtK39LRqQZ9gElv/
TLSH T1F4B34C96FCC1E902C6C522B7FB1E428D771757B8D3EA72039D266B21338A46A0F7B541
telfhash t1ecd02b77c6b0649ed7d10884418e6b1189fdfe3e0f20300a02dc2fcac1e3665b10e42a
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 :
44
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:
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
masquerade mirai rust
Link:
https://www.filescan.io/uploads/6962fdac07ef5fa68e83fe7f/reports/1eb20a8b-e01e-4638-941a-81aed49ea3c6/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-10T20:05:00Z UTC
Last seen:
2026-01-10T23:00:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Mirai.b HEUR:Backdoor.Linux.Gafgyt.ij HEUR:Backdoor.Linux.Gafgyt.gu
Link:
https://opentip.kaspersky.com/ff4abf773e3047ea1a94dbb4d2a7032a9dccc7a396cad04511d991c66dc37448/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/38e5846a-b7c7-4d9c-8879-149148dd0610
Behavior Graph:
Download SVG
%3 guuid=365575a9-1900-0000-3932-1ce046090000 pid=2374 /usr/bin/sudo guuid=619c8fab-1900-0000-3932-1ce04d090000 pid=2381 /tmp/sample.bin guuid=365575a9-1900-0000-3932-1ce046090000 pid=2374->guuid=619c8fab-1900-0000-3932-1ce04d090000 pid=2381 execve
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/8ec92282-e320-496b-b9e7-73292f5ed0bf
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1848137
Signature
Connects to many ports of the same IP (likely port scanning)
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: 1848137 Sample: arm5.kok.elf Startdate: 11/01/2026 Architecture: LINUX Score: 100 94 144.126.148.148, 10014, 10068, 10075 LOYOLAUS United States 2->94 96 175.110.251.240, 6672 WITRIBE-AS-APWITRIBEPAKISTANLIMITEDPK Saudi Arabia 2->96 98 11 other IPs or domains 2->98 114 Multi AV Scanner detection for submitted file 2->114 116 Connects to many ports of the same IP (likely port scanning) 2->116 11 arm5.kok.elf 2->11         started        signatures3 process4 signatures5 124 Sample tries to kill multiple processes (SIGKILL) 11->124 126 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->126 14 arm5.kok.elf 11->14         started        process6 file7 76 /var/spool/cron/root, ASCII 14->76 dropped 78 /var/spool/cron/crontabs/root, ASCII 14->78 dropped 80 /root/.bashrc, ASCII 14->80 dropped 82 11 other files (10 malicious) 14->82 dropped 128 Sample tries to set files in /etc globally writable 14->128 130 Sample tries to persist itself using /etc/profile 14->130 132 Drops files in suspicious directories 14->132 134 4 other signatures 14->134 18 arm5.kok.elf sh 14->18         started        20 arm5.kok.elf sh 14->20         started        22 arm5.kok.elf sh 14->22         started        24 67 other processes 14->24 signatures8 process9 signatures10 27 sh .monitor 18->27         started        29 sh S99backup0 20->29         started        31 sh cp 22->31         started        120 Sample tries to kill a massive number of system processes 24->120 122 Sample tries to kill multiple processes (SIGKILL) 24->122 35 sh S99backup1 24->35         started        37 sh S99backup2 24->37         started        39 sh S99network 24->39         started        41 56 other processes 24->41 process11 file12 43 .monitor 27->43         started        45 S99backup0 29->45         started        84 /usr/bin/.update, ELF 31->84 dropped 100 Writes identical ELF files to multiple locations 31->100 102 Drops invisible ELF files 31->102 104 Drops files in suspicious directories 31->104 47 S99backup1 35->47         started        49 S99backup2 37->49         started        51 S99network 39->51         started        86 /var/spool/cron/crontabs/tmp.zyylkJ, ASCII 41->86 dropped 88 /var/log/.update, ELF 41->88 dropped 90 /var/jbx/shared/.update, ELF 41->90 dropped 92 /boot/.update, ELF 41->92 dropped 106 Sample deletes itself 41->106 108 Sample tries to persist itself using cron 41->108 110 Executes the "crontab" command typically for achieving persistence 41->110 112 Terminates several processes with shell command 'killall' 41->112 53 sh crontab 41->53         started        56 sh .update 41->56         started        signatures13 process14 signatures15 66 138 other processes 43->66 58 S99backup0 .update 45->58         started        68 81 other processes 45->68 60 S99backup1 .update 47->60         started        70 71 other processes 47->70 62 S99backup2 .update 49->62         started        72 69 other processes 49->72 64 S99network .update 51->64         started        74 65 other processes 51->74 118 Executes the "crontab" command typically for achieving persistence 53->118 process16
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/ff4abf773e3047ea1a94dbb4d2a7032a9dccc7a396cad04511d991c66dc37448
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ff4abf773e3047ea1a94dbb4d2a7032a9dccc7a396cad04511d991c66dc37448/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/ff4abf773e3047ea1a94dbb4d2a7032a9dccc7a396cad04511d991c66dc37448
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-01-11 00:56:30 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=75fl65z6gbd6uguu3o2nfjydfko4zr5ds3fnarir3gi4m3odorea._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai
Link:
https://tria.ge/reports/260111-bx637scz3g/
Verdict:
Malicious
Tags:
Unix.Trojan.Mirai-10001386-0
YARA:
n/a
Link:
https://app.threat.zone/submission/524ae021-494c-4b90-be98-187221286a14
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/ff4abf773e3047ea1a94dbb4d2a7032a9dccc7a396cad04511d991c66dc37448

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 ff4abf773e3047ea1a94dbb4d2a7032a9dccc7a396cad04511d991c66dc37448

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3749721/
  
Delivery method
Distributed via web download

Comments