MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 caa3b7ed6add5423d0c13ee2d5c43e959e9fc83018307f90fc38e0b97a84a600. 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: 9


Intelligence 9 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: caa3b7ed6add5423d0c13ee2d5c43e959e9fc83018307f90fc38e0b97a84a600
SHA3-384 hash: 21ef421f63e6317196048e32919cda0bce43f160a4215f01199eeed9832213dbc8f4aff682cba88dec7524d91f7a27d9
SHA1 hash: 148f3d6b9bfb1c0002d18b77a9a05f13be855d6d
MD5 hash: 90a18a7fb8252635ee5747e2d4138287
humanhash: whiskey-lemon-emma-sierra
File name:kworkerd-netns-rt
Download: download sample
Signature Mirai
Create hunting rule
File size:430'884 bytes
First seen:2026-07-14 05:39:35 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 12288:v++mkyh758nDqYkNxjW+YHHE1xGvz3llqLi:YFhunD6NZW+YHkOloLi
TLSH T19A94235A7237C98AE744A53E8877C8293B7DBA043E72E624F43DDD841E0C1DD9A44BD1
telfhash t192d00224587813b052cd8c6e55dceb08a860a5e7aaa31d1fdd94c899ea26e4b9d01d2c
Magika elf
Reporter abuse_ch
Tags:elf mirai

Intelligence

File Origin
# of uploads :
1
# of downloads :
77
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Manages services
Runs as daemon
Opens a port
Creating a file
Creating a file in the %temp% directory
Sets a written file as executable
Collects information on the CPU
Connection attempt
Receives data from a server
Changes access rights for a written file
Kills processes
Changes the time when the file was created, accessed, or modified
Deleting a recently created file
Creating a process from a recently created file
Sends data to a server
Creates or modifies files in /cron to set up autorun
Kills critical processes
Substitutes an application name
Creates or modifies files to set up autorun
Creates or modifies files in /init.d to set up autorun
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
gcc mirai
Link:
https://www.filescan.io/uploads/6a55cbdac1b5a62b4956b222/reports/d41cce22-146c-471e-a202-aca1e7ef83a7/overview
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
mips
Packer:
custom
Botnet:
unknown
Number of open files:
0
Number of processes launched:
2
Processes remaning?
false
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/caa3b7ed6add5423d0c13ee2d5c43e959e9fc83018307f90fc38e0b97a84a600
Behaviour
no suspicious findings
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Verdict:
Malicious
File Type:
elf.32.be
First seen:
2026-07-14T00:04:00Z UTC
Last seen:
2026-07-15T18:32:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/caa3b7ed6add5423d0c13ee2d5c43e959e9fc83018307f90fc38e0b97a84a600/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/dd2d1656-474e-4484-a745-7f11cacfd261
Behavior Graph:
Download SVG
%3 guuid=62731954-1900-0000-0969-1940d30e0000 pid=3795 /usr/bin/sudo guuid=0c09e455-1900-0000-0969-1940db0e0000 pid=3803 /tmp/sample.bin guuid=62731954-1900-0000-0969-1940d30e0000 pid=3795->guuid=0c09e455-1900-0000-0969-1940db0e0000 pid=3803 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/eefe60ed-1ff0-45dc-9a70-32f93068f248
Result
Threat name:
Mirai, Xmrig
Create hunting rule
Detection:
malicious
Classification:
spre.troj.spyw.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1941950
Signature
Antivirus detection for dropped file
Drops files in suspicious directories
Drops invisible ELF files
Executes itself again with its parent PID as an argument (indicative of hampering debugging)
Executes the "crontab" command typically for achieving persistence
Found strings related to Crypto-Mining
Malicious sample detected (through community Yara rule)
Opens /sys/class/net/* files useful for querying network interface information
Sample deletes itself
Sample tries to persist itself using /etc/profile
Sample tries to persist itself using cron
Sample tries to set files in /etc globally writable
Yara detected Mirai
Yara detected Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1941950 Sample: kworkerd-netns-rt.elf Startdate: 14/07/2026 Architecture: LINUX Score: 100 82 91.92.40.118, 443, 50750, 60242 TODYL-CLOUD-TodylIncUS Bulgaria 2->82 86 Malicious sample detected (through community Yara rule) 2->86 88 Antivirus detection for dropped file 2->88 90 Yara detected Mirai 2->90 92 Yara detected Xmrig cryptocurrency miner 2->92 11 kworkerd-netns-rt.elf 2->11         started        15 systemd sh 2->15         started        17 systemd snapd-env-generator 2->17         started        19 systemd snapd-env-generator 2->19         started        signatures3 process4 file5 80 /tmp/.5432, ELF 11->80 dropped 108 Drops invisible ELF files 11->108 110 Sample deletes itself 11->110 21 kworkerd-netns-rt.elf .5432 11->21         started        24 sh sh 15->24         started        26 sh wget 15->26         started        29 sh rm 15->29         started        signatures6 process7 file8 94 Found strings related to Crypto-Mining 21->94 31 .5432 21->31         started        33 sh wget 24->33         started        37 sh .k 24->37         started        39 sh chmod 24->39         started        76 /tmp/..redis-sentinel, POSIX 26->76 dropped signatures9 process10 file11 41 .5432 31->41         started        70 /tmp/.k, ELF 33->70 dropped 84 Drops invisible ELF files 33->84 45 .k 37->45         started        signatures12 process13 file14 72 /etc/profile.d/red...aof-rewrite-dl7z.sh, ASCII 41->72 dropped 74 /etc/init.d/redis-...ck aof-rewrite-gb2a, POSIX 41->74 dropped 96 Sample tries to set files in /etc globally writable 41->96 98 Opens /sys/class/net/* files useful for querying network interface information 41->98 100 Sample tries to persist itself using /etc/profile 41->100 102 Drops files in suspicious directories 41->102 47 .5432 sh 41->47         started        50 .5432 sh 41->50         started        52 .5432 sh 41->52         started        56 2 other processes 41->56 54 .k 45->54         started        signatures15 process16 signatures17 112 Executes itself again with its parent PID as an argument (indicative of hampering debugging) 47->112 58 sh crontab 47->58         started        62 sh crontab 50->62         started        64 sh systemctl 52->64         started        66 sh systemctl 56->66         started        68 sh update-rc.d 56->68         started        process18 file19 78 /var/spool/cron/crontabs/tmp.4aNzur, ASCII 58->78 dropped 104 Sample tries to persist itself using cron 58->104 106 Executes the "crontab" command typically for achieving persistence 58->106 signatures20
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/caa3b7ed6add5423d0c13ee2d5c43e959e9fc83018307f90fc38e0b97a84a600
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/caa3b7ed6add5423d0c13ee2d5c43e959e9fc83018307f90fc38e0b97a84a600/
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-07-14 04:56:10 UTC
File Type:
ELF32 Big (Exe)
AV detection:
8 of 24 (33.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zkr3p3lk3vkchugbh3rnlrb6swpj7sbqdayh7eh4hdqls6ueuyaa._file
Result
Malware family:
n/a
Score:
  1/10
Tags:
n/a
Link:
https://tria.ge/reports/260714-gc8zysex7l/
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/caa3b7ed6add5423d0c13ee2d5c43e959e9fc83018307f90fc38e0b97a84a600

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:linux_generic_ipv6_catcher
Create hunting rule
Author:@_lubiedo
Description:ELF samples using IPv6 addresses
Rule name:TH_Generic_MassHunt_Linux_Malware_2026_CYFARE
Create hunting rule
Author:CYFARE
Description:Generic Linux malware mass-hunt rule - 2026
Reference:https://cyfare.net/
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 caa3b7ed6add5423d0c13ee2d5c43e959e9fc83018307f90fc38e0b97a84a600

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3883715/
  
Delivery method
Distributed via web download

Comments