MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cb4efe99fbc11befd19e6eb33c1c29b00301429ddfb6864a10130dc7ac3eb5e0. 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: 7

Intelligence 7 IOCs YARA 9 File information Comments

SHA256 hash:	cb4efe99fbc11befd19e6eb33c1c29b00301429ddfb6864a10130dc7ac3eb5e0
SHA3-384 hash:	f0cbd01b9fef0022e65011825eb8842095275c0ae1618cce31c2e126798a3ae215b9c67218f31cf6d9a2b2f576be5a58
SHA1 hash:	94868c9ea3a3bf92a9ffa5fb3cd879bac60c140e
MD5 hash:	8770c0083d72b222a0fc4503dddd339b
humanhash:	connecticut-comet-leopard-autumn
File name:	flutter.mipsel
Download:	download sample
Signature	Mirai Create hunting rule
File size:	262'440 bytes
First seen:	2026-08-19 01:51:46 UTC
Last seen:	Never
File type:	elf
MIME type:	application/x-sharedlib
ssdeep	6144:zTTzGgib+PZBB7ipRkADLpR84CTL3geUHvRYLKV4:XTz2b+PZnip+mU4CTSCLKu
TLSH	T17E445C8A9E601FEBC46FCD30063E871719ED999BA2F16736C67CDC48358E24946E385C
telfhash	t1fa4123355f7995229ed2c4509cee9322a51ed1190755ee27df24854c102e09ff21be8f
Magika	elf
Reporter	abuse_ch
Tags:	elf mirai upx-dec

abuse_ch

UPX decompressed file, sourced from SHA256 b1f240b7153d4f3e5c6239c00ea341f46e00df99b4e3751d85b341f4a8106b91

UPX unpacked

This file is the unpacked version of a file that has been packed with UPX. Below is furhter information about the parent (compressed) file.

File size (compressed) :	134'764 bytes
File size (de-compressed) :	262'440 bytes
Format:	linux/mipsel
Packed file:	b1f240b7153d4f3e5c6239c00ea341f46e00df99b4e3751d85b341f4a8106b91

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

Unix.Dropper.Mirai-7135897-0

Unix.Dropper.Mirai-7135918-0

Unix.Dropper.Mirai-7135925-0

Unix.Dropper.Mirai-7135954-0

Unix.Dropper.Mirai-7136028-0

Unix.Trojan.Mirai-8025795-0

Unix.Trojan.Mirai-10058997-0

Result

Verdict:

Malware

Maliciousness:

Behaviour

Kills processes

Opens a port

Receives data from a server

Sends data to a server

Connection attempt

Manages services

Runs as daemon

DNS request

Changes access rights for a written file

Creating a file

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

Performs a bruteforce attack in the network

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

base64 dropper expand gcc lolbin mirai obfuscated

Link:

https://www.filescan.io/uploads/6a850c68508549eebf1bcb03/reports/fc03e366-ed76-4b49-a400-37d0b7574caa/overview

Status:

terminated

Link:

https://sandbox.kunai.rocks/analysis/c483c161-1261-44e1-94a7-43cdae3f6907

Behavior Graph:

Download SVG

Gathering data

Score:

100%

Verdict:

Malware

File Type:

ELF

Link:

https://malprob.io/report/cb4efe99fbc11befd19e6eb33c1c29b00301429ddfb6864a10130dc7ac3eb5e0

Detection:

mirai

Link:

https://mwdb.cert.pl/sample/cb4efe99fbc11befd19e6eb33c1c29b00301429ddfb6864a10130dc7ac3eb5e0/

Threat name:

Linux.Backdoor.Mirai

Status:

Malicious

First seen:

2026-08-19 01:55:41 UTC

File Type:

ELF32 Little (SO)

AV detection:

12 of 24 (50.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=znhp5gp3yen67um6n2ztyhbjwabqcqu5363imsqqcmg4plb6wxqa._file

Result

Malware family:

n/a

Score:

7/10

Tags:

defense_evasion discovery execution persistence privilege_escalation

Link:

https://tria.ge/reports/260819-carknswxdt/

Behaviour

Reads runtime system information

System Network Configuration Discovery

Changes its process name

Reads system network configuration

Write file to user bin folder

Creates/modifies Cron job

Enumerates active TCP sockets

Enumerates running processes

Modifies rc script

Modifies systemd

Modifies Watchdog functionality

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/cb4efe99fbc11befd19e6eb33c1c29b00301429ddfb6864a10130dc7ac3eb5e0

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:	DetectEncryptedVariants Create hunting rule
Author:	Zinyth
Description:	Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded

Rule name:	elf_arm_mips_ko_so Create hunting rule

Rule name:	enterpriseapps2 Create hunting rule
Author:	Tim Brown @timb_machine
Description:	Enterprise apps

Rule name:	RANSOMWARE Create hunting rule
Author:	ToroGuitar

Rule name:	setsockopt Create hunting rule
Author:	Tim Brown @timb_machine
Description:	Hunts for setsockopt() red flags

Rule name:	SHA512_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA384/SHA512 constants

Rule name:	test_rule_vldslv Create hunting rule

Rule name:	unixredflags3 Create hunting rule
Author:	Tim Brown @timb_machine
Description:	Hunts for UNIX red flags

Rule name:	woof_mirai_variant Create hunting rule
Author:	Nokia Deepfield ERT
Description:	Detects Woof Mirai variant (ChaCha20 table, HTTP C2 with token/guid, .woof dropper)
Reference:	Internal analysis of sample 6ef4ce02