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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b21b3c043605ca472da929fa8225bb6d74a9752153fb901377db874bc65d10a7. 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 10 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b21b3c043605ca472da929fa8225bb6d74a9752153fb901377db874bc65d10a7
SHA3-384 hash: 8e190135b755f98f68998a3521c11b78c9caf96853af78d0887f52367827d8bae7c849d9c879c5d0631eecbd378194bd
SHA1 hash: 39d960f292446b18f679cc413f997eda63bd9097
MD5 hash: 62b838026025080be0b766ff26d75043
humanhash: dakota-chicken-ohio-four
File name:mbupload-_kb5zo9b.bin
Download: download sample
Signature Mirai
Create hunting rule
File size:464'448 bytes
First seen:2026-10-06 00:18:24 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 12288:cff9eqawdZ3mcN0SS1GEZrJbThT0hfQUgp78Tj:WfQBwdccN0SSZ0T
TLSH T12AA4E09BF3072D82C5D7D939088AC5448B5AE56763F3D3053F43A9BB38292724F29399
Magika elf
Reporter abuse_ch
Tags:elf mirai upx-dec


Avatar
abuse_ch
UPX decompressed file, sourced from SHA256 b26587d97ae8aff4d9ab3e848ace294224c9f9e01185e89f3504eed6fc85b7a6
File size (compressed) :245'220 bytes
File size (de-compressed) :464'448 bytes
Format:linux/arm
Packed file: b26587d97ae8aff4d9ab3e848ace294224c9f9e01185e89f3504eed6fc85b7a6

Intelligence

File Origin
# of uploads :
1
# of downloads :
82
Origin country :
NL NL
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.ELF.IRCBot-AE.85623618.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
DNS request
Receives data from a server
Sends data to a server
Runs as daemon
Connection attempt
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
gcc masquerade
Link:
https://www.filescan.io/uploads/6ac43e8be61ba82551c97083/reports/a2bf58e8-5dcc-4fbe-bb8f-69cec78b75be/overview
Verdict:
Unknown
File Type:
elf.32.le
Link:
https://opentip.kaspersky.com/b21b3c043605ca472da929fa8225bb6d74a9752153fb901377db874bc65d10a7/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/e2e855b2-6db8-4011-b7ed-e969c7168a1f
Behavior Graph:
Download SVG
%3 guuid=413b58d4-1800-0000-fb9b-e1bcfc0b0000 pid=3068 /usr/bin/sudo guuid=e10242d8-1800-0000-fb9b-e1bc050c0000 pid=3077 /tmp/sample.bin guuid=413b58d4-1800-0000-fb9b-e1bcfc0b0000 pid=3068->guuid=e10242d8-1800-0000-fb9b-e1bc050c0000 pid=3077 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/67203b3a-99d1-4e28-9559-d5463bf14c2d
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b21b3c043605ca472da929fa8225bb6d74a9752153fb901377db874bc65d10a7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b21b3c043605ca472da929fa8225bb6d74a9752153fb901377db874bc65d10a7/
Threat name:
Linux.Backdoor.Tsunami
Create hunting rule
Status:
Malicious
First seen:
2026-10-06 00:18:58 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=wintybbwaxfeolnjfh5iejn3nv2ks5jbkp5zae3x3oduxrs5cctq._file
Result
Malware family:
kaiten
Create hunting rule
Score:
  10/10
Tags:
family:kaiten botnet
Link:
https://tria.ge/reports/261006-ama3cayvaz/
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/b21b3c043605ca472da929fa8225bb6d74a9752153fb901377db874bc65d10a7

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:ELF_IoT_Persistence_Hunt
Create hunting rule
Author:4r4
Description:Hunts for ELF files with persistence and download capabilities
Rule name:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
Rule name:F01_s1ckrule
Create hunting rule
Author:s1ckb017
Rule name:linux_generic_ipv6_catcher
Create hunting rule
Author:@_lubiedo
Description:ELF samples using IPv6 addresses
Rule name:linux_generic_irc_catcher
Create hunting rule
Author:@_lubiedo
Description:Find new ELF IRC samples
Rule name:malwareelf55503
Create hunting rule
Rule name:MIRAI_OHSHIT_payload
Create hunting rule
Author:AfterPacket
Description:MIRAI_OHSHIT ELF payload -- compiled-in C2 set, all architectures
Reference:https://github.com/Afterpacket/drosera-threat-intel
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 b26587d97ae8aff4d9ab3e848ace294224c9f9e01185e89f3504eed6fc85b7a6

Mirai

elf b21b3c043605ca472da929fa8225bb6d74a9752153fb901377db874bc65d10a7

(this sample)

  
Dropped by
SHA256 b26587d97ae8aff4d9ab3e848ace294224c9f9e01185e89f3504eed6fc85b7a6
  
Dropped by
MD5 82d8214edb502e265eeff96c1464a7d0

Comments