MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 21b135c4cd6885b2cd9f482616ebcc218bde4faa2a94b3597fca99baad695d53. 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: 8


Intelligence 8 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 21b135c4cd6885b2cd9f482616ebcc218bde4faa2a94b3597fca99baad695d53
SHA3-384 hash: 5367b11041f87cb6ab4e6ff00c76408ab229535f5d88ff5b5f55d4fae03028a1f73362ea484d279514b35aad67567a1a
SHA1 hash: 56d1c08a4442e4b6437269ce78ae321e28c35eeb
MD5 hash: 358bd5b66aa5c914f8d470d479e6069d
humanhash: whiskey-connecticut-two-helium
File name:x86_64
Download: download sample
Signature Mirai
Create hunting rule
File size:87'724 bytes
First seen:2026-07-01 02:22:06 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:OnxbH5xZuJ+7M35dp111juADX4KtP9ncue4eDYfevqrous9zKFX3MynirxW0/0Wv:a8J+GXp1116ADX4CnyDYfeSr8Oid/bH
TLSH T1A88312EB483AD730C93591B80DF4546CF5568D35A2488EEA2FCD30399C9A2C43ADC9CD
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 UPX
File size (compressed) :87'724 bytes
File size (de-compressed) :211'152 bytes
Format:linux/amd64
Unpacked file: 4c6f74f1ec9009ed6ef66b72a8e2412ea2606a2d4788b9b3fa3573a7f080f5c1

Intelligence

File Origin
# of uploads :
1
# of downloads :
69
Origin country :
DE DE
Vendor Threat Intelligence
Details
Link:
https://research.acce.ciphertechsolutions.com/results/0e75b985-f189-444b-af72-cb12da7ee13e/
Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Connection attempt
Opens a port
Substitutes an application name
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
mirai packed upx
Link:
https://www.filescan.io/uploads/6a4479e8a44d71822213f961/reports/7a7cc73a-4f07-4dde-b8d7-fcafd827d067/overview
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/a5255c29-abaa-45aa-ab9f-8597dad17084
Result
Threat name:
n/a
Detection:
suspicious
Classification:
evad
Score:
21 / 100
Link:
https://www.joesandbox.com/analysis/1935872
Signature
Sample is packed with UPX
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1935872 Sample: x86_64.elf Startdate: 01/07/2026 Architecture: LINUX Score: 21 10 Sample is packed with UPX 2->10 6 x86_64.elf 2->6         started        process3 process4 8 x86_64.elf 6->8         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/21b135c4cd6885b2cd9f482616ebcc218bde4faa2a94b3597fca99baad695d53
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/21b135c4cd6885b2cd9f482616ebcc218bde4faa2a94b3597fca99baad695d53/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=egytlrgnncc3ftm7jatbn26megf54t5kfkklgwl7zkm3vlljlvjq._file
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery linux upx
Link:
https://tria.ge/reports/260701-ctt5xaev51/
Behaviour
Reads runtime system information
Changes its process name
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:linux_generic_ipv6_catcher
Create hunting rule
Author:@_lubiedo
Description:ELF samples using IPv6 addresses
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: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: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 21b135c4cd6885b2cd9f482616ebcc218bde4faa2a94b3597fca99baad695d53

(this sample)

Mirai

elf 4c6f74f1ec9009ed6ef66b72a8e2412ea2606a2d4788b9b3fa3573a7f080f5c1

  
URLhaus
https://urlhaus.abuse.ch/url/3877695/
  
Delivery method
Distributed via web download
  
Dropping
SHA256 4c6f74f1ec9009ed6ef66b72a8e2412ea2606a2d4788b9b3fa3573a7f080f5c1
  
Dropping
MD5 eae132b466adc97be5f44fe71ee404ce

Comments