MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 21b28b4847b2ee1944d445dffc6edd7ab9792cd90bda06edcf9e440a548c5881. 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: 6


Intelligence 6 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 21b28b4847b2ee1944d445dffc6edd7ab9792cd90bda06edcf9e440a548c5881
SHA3-384 hash: 8480a83edddc068c722a12211bbe4312c338bb7abbf0290b530ad8112b8caa4bdcc53af494fb68ac61cca042c10f4b98
SHA1 hash: dbc98c2539335b182f3397391ab927b0e187639b
MD5 hash: 0f2355eaa76a09ba44aac2f12c1cf88b
humanhash: gee-enemy-avocado-california
File name:21b28b4847b2ee1944d445dffc6edd7ab9792cd90bda06edcf9e440a548c5881.elf
Download: download sample
Signature Mirai
Create hunting rule
File size:83'880 bytes
First seen:2026-08-18 21:10:36 UTC
Last seen:2026-08-18 22:36:21 UTC
File type: elf
MIME type:application/x-sharedlib
ssdeep 1536:+IZ24V89NUa68fCCYx1+W+yM3z9sqn/yd+Y1y2GkRGUNCXkWYb5xaw4fr0Hls:+IJS3xNLW1+W+yCz9Xy+Y1hHk0rdxawk
TLSH T14E8312EBD18541C6F23A8EF15B6B8980260991163BBCCB2655FDD17B3A09C3E482CBD5
Magika elf
Reporter whack_sh
Tags:elf exe mirai UPX whack.sh
File size (compressed) :83'880 bytes
File size (de-compressed) :181'216 bytes
Format:linux/mipsel
Unpacked file: 2e0e801d485bd31bdd3c96dc946c171fc5254263c45b436663bfb1a2539c3001

Intelligence

File Origin
# of uploads :
2
# of downloads :
142
Origin country :
US US
Vendor Threat Intelligence
Details
Link:
https://research.acce.ciphertechsolutions.com/results/17e665fa-2dba-4511-9ed9-e23e6d2ae967/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file
Sets a written file as executable
Runs as daemon
Creates or modifies symbolic links
Changes the time when the file was created, accessed, or modified
Opens a port
Connection attempt
Launching a process
Changes access rights for a written file
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 files to set up autorun
Creates or modifies symbolic links in /init.d to set up autorun
Deleting of the original file
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
mirai packed upx
Link:
https://www.filescan.io/uploads/6a84ca5cce6bca4881d20806/reports/c4b216d5-3956-4166-821a-6daa275a887d/overview
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/08f0df92-c54e-411b-9264-189da81d53f0
Behavior Graph:
Download SVG
%3 guuid=e41ce4b4-1b00-0000-2b3d-53f0e5080000 pid=2277 /usr/bin/sudo guuid=a7f123b9-1b00-0000-2b3d-53f0e7080000 pid=2279 /tmp/sample.bin guuid=e41ce4b4-1b00-0000-2b3d-53f0e5080000 pid=2277->guuid=a7f123b9-1b00-0000-2b3d-53f0e7080000 pid=2279 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/82dfea53-9a6a-4474-95c7-1f2c12ded82f
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/21b28b4847b2ee1944d445dffc6edd7ab9792cd90bda06edcf9e440a548c5881
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/21b28b4847b2ee1944d445dffc6edd7ab9792cd90bda06edcf9e440a548c5881/
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-08-18 21:11:32 UTC
File Type:
ELF32 Little (SO)
AV detection:
12 of 38 (31.58%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=egziwschwlxbsrguixp7y3w5pk4xslgzbpnan3optzcauvemlcaq._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
command_and_control defense_evasion discovery execution persistence privilege_escalation upx
Link:
https://tria.ge/reports/260818-z1f8yshn41/
Behaviour
Reads runtime system information
Changes its process name
Modifies Bash startup script
UPX packed file
Creates/modifies Cron job
Creates/modifies environment variables
Modifies init.d
Modifies rc script
Modifies systemd
Deletes itself
Outbound SSH connection to public host
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/21b28b4847b2ee1944d445dffc6edd7ab9792cd90bda06edcf9e440a548c5881

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:elf_arm_mips_ko_so
Create hunting rule
Rule name:SUSP_ELF_LNX_UPX_Compressed_File
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects a suspicious ELF binary with UPX compression
Reference:Internal Research
Rule name:upx_packed_elf_v1
Create hunting rule
Author:RandomMalware

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

Mirai

elf 21b28b4847b2ee1944d445dffc6edd7ab9792cd90bda06edcf9e440a548c5881

(this sample)

Mirai

elf 2e0e801d485bd31bdd3c96dc946c171fc5254263c45b436663bfb1a2539c3001

  
Delivery method
Distributed via web download
  
Dropping
SHA256 2e0e801d485bd31bdd3c96dc946c171fc5254263c45b436663bfb1a2539c3001
  
Dropping
MD5 356e8bd4bbed03f22c8b99dfe584aec4
  
URLhaus
https://urlhaus.abuse.ch/url/3892129/

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