MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 257ae90d3a3a93c93ddfa6a9c7702d35ca382843d8e87ae13e34851bc35a841e. 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: 12


Intelligence 12 IOCs YARA 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 257ae90d3a3a93c93ddfa6a9c7702d35ca382843d8e87ae13e34851bc35a841e
SHA3-384 hash: eb7d06c3d267f1ddde865589e1bc82e1319e18492cf100d033109c24e6ab3135fa3002168bfc1ecea253749907263653
SHA1 hash: 74b84e6bf39f7cbc463b9f0817ef2b1058fe3042
MD5 hash: eef9a81a9874b6840aa5b115409057ba
humanhash: triple-fanta-delta-nebraska
File name:x86_64.uhavenobotsxd
Download: download sample
Signature Mirai
Create hunting rule
File size:89'904 bytes
First seen:2025-11-25 03:55:20 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:pmtVUXbRcqFnpgPPSu5y1g9yThBhDE3h+9rcFdMvan:qVUK8niPSl1yyTLwh+9I+S
TLSH T110935B16FAC1D4FCC85AD239625FA276D932F42D1236722B47D4FB297C8EA206F1E150
telfhash t1ab3155313885196461ffeb777242f2f029901e3416f071e2a937a9f7dfaa78408640a2
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

Intelligence

File Origin
# of uploads :
1
# of downloads :
51
Origin country :
DE DE
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.30455.LC.BadVar.UNOFFICIAL
Create hunting rule

Unix.Trojan.Mirai-10001386-0
Create hunting rule

Unix.Trojan.Mirai-10017351-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Changes access rights for a written file
Attempts to kill processes by name
Connection attempt
Runs as daemon
Kills processes
Opens a port
Launching a process
Sends data to a server
Creating a process from a recently created file
Creating a file
Deleting a recently created file
Deletes a file
Changes the time when the file was created, accessed, or modified
Receives data from a server
Sets a written file as executable
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Writes files to system directory
Creates or modifies files in /init.d to set up autorun
Creates or modifies symbolic links in /init.d to set up autorun
Creates or modifies files to set up autorun
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
gafgyt mirai
Link:
https://www.filescan.io/uploads/692528b5f6a4ba1793afd4d0/reports/53b6bf26-e917-40d8-bd5e-0bef8d5dfa4a/overview
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
x86
Packer:
not packed
Botnet:
unknown
Number of open files:
23
Number of processes launched:
4
Processes remaning?
true
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/257ae90d3a3a93c93ddfa6a9c7702d35ca382843d8e87ae13e34851bc35a841e
Behaviour
Persistence
Process Renaming
Botnet C2s
TCP botnet C2(s):
type:Mirai 94.154.35.153:6969
UDP botnet C2(s):
not identified
Result
Gathering data
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/ebffc239-e4b0-4448-a0cc-692225d49778
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1820267
Signature
Drops files in suspicious directories
Drops invisible ELF files
Executes the "crontab" command typically for achieving persistence
Malicious sample detected (through community Yara rule)
Modifies the '.bashrc' or '.bash_profile' file typically for persisting actions
Multi AV Scanner detection for submitted file
Sample deletes itself
Sample reads /proc/mounts (often used for finding a writable filesystem)
Sample tries to kill multiple processes (SIGKILL)
Sample tries to persist itself using /etc/profile
Sample tries to persist itself using cron
Sample tries to persist itself using System V runlevels
Sample tries to set files in /etc globally writable
Terminates several processes with shell command 'killall'
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1820267 Sample: x86_64.uhavenobotsxd.elf Startdate: 25/11/2025 Architecture: LINUX Score: 100 87 185.56.65.167, 61456 T2OE-EUNL Netherlands 2->87 89 94.154.35.153, 40686, 6969 SELECTELRU Ukraine 2->89 91 2 other IPs or domains 2->91 109 Malicious sample detected (through community Yara rule) 2->109 111 Multi AV Scanner detection for submitted file 2->111 11 x86_64.uhavenobotsxd.elf 2->11         started        signatures3 process4 signatures5 115 Sample reads /proc/mounts (often used for finding a writable filesystem) 11->115 14 x86_64.uhavenobotsxd.elf 11->14         started        process6 file7 79 /var/spool/cron/root, ASCII 14->79 dropped 81 /var/spool/cron/crontabs/root, ASCII 14->81 dropped 83 /root/.bashrc, ASCII 14->83 dropped 85 8 other files (7 malicious) 14->85 dropped 119 Sample tries to set files in /etc globally writable 14->119 121 Sample tries to persist itself using /etc/profile 14->121 123 Drops files in suspicious directories 14->123 125 4 other signatures 14->125 18 x86_64.uhavenobotsxd.elf sh 14->18         started        20 x86_64.uhavenobotsxd.elf 14->20         started        22 x86_64.uhavenobotsxd.elf sh 14->22         started        24 24 other processes 14->24 signatures8 process9 signatures10 27 sh S99network 18->27         started        29 x86_64.uhavenobotsxd.elf sh 20->29         started        31 x86_64.uhavenobotsxd.elf sh 20->31         started        43 2 other processes 20->43 33 sh crontab 22->33         started        37 sh 22->37         started        113 Sample tries to kill multiple processes (SIGKILL) 24->113 39 sh cp 24->39         started        41 sh .monitor 24->41         started        45 20 other processes 24->45 process11 file12 47 S99network 27->47         started        49 sh .update 29->49         started        52 sh .update 31->52         started        75 /var/spool/cron/crontabs/tmp.tvmZzB, ASCII 33->75 dropped 97 Sample tries to persist itself using cron 33->97 99 Executes the "crontab" command typically for achieving persistence 33->99 54 sh crontab 37->54         started        77 /usr/bin/.update, ELF 39->77 dropped 101 Drops invisible ELF files 39->101 103 Drops files in suspicious directories 39->103 56 .monitor 41->56         started        58 sh .update 43->58         started        60 sh .update 43->60         started        105 Sample deletes itself 45->105 107 Terminates several processes with shell command 'killall' 45->107 signatures13 process14 signatures15 62 S99network .update 47->62         started        65 S99network .update 47->65         started        67 S99network .update 47->67         started        73 53 other processes 47->73 93 Sample reads /proc/mounts (often used for finding a writable filesystem) 49->93 95 Executes the "crontab" command typically for achieving persistence 54->95 69 .monitor .update 56->69         started        71 .monitor sleep 56->71         started        process16 signatures17 117 Sample reads /proc/mounts (often used for finding a writable filesystem) 62->117
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/257ae90d3a3a93c93ddfa6a9c7702d35ca382843d8e87ae13e34851bc35a841e
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/257ae90d3a3a93c93ddfa6a9c7702d35ca382843d8e87ae13e34851bc35a841e/
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2025-11-25 03:55:36 UTC
File Type:
ELF64 Little (Exe)
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ev5osdj2hkj4spo7u2u4o4bngxfdqkcd3duhvyj6gscrxq22qqpa._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai botnet defense_evasion discovery execution linux persistence privilege_escalation
Link:
https://tria.ge/reports/251125-eg3mmawlew/
Behaviour
Reads runtime system information
Writes file to shm directory
Changes its process name
Modifies Bash startup script
Creates a large amount of network flows
Creates/modifies Cron job
Creates/modifies environment variables
Deletes log files
Enumerates running processes
Modifies init.d
Modifies rc script
Write file to user bin folder
Executes dropped EXE
Unexpected DNS network traffic destination
Mirai
Mirai family
Verdict:
Malicious
Tags:
trojan mirai gafgyt Unix.Trojan.Mirai-7640640-0
YARA:
Linux_Trojan_Gafgyt_9e9530a7 Linux_Trojan_Gafgyt_807911a2 Linux_Trojan_Gafgyt_d4227dbf Linux_Trojan_Gafgyt_d996d335 Linux_Trojan_Gafgyt_620087b9 Linux_Trojan_Gafgyt_33b4111a Linux_Trojan_Mirai_6a77af0f Linux_Trojan_Mirai_e0cf29e2
Link:
https://app.threat.zone/submission/927c145f-46b2-49ea-9e1f-ae8ecf832e4f
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.64
Link:
https://yomi.yoroi.company/submissions/257ae90d3a3a93c93ddfa6a9c7702d35ca382843d8e87ae13e34851bc35a841e

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:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
Rule name:linux_generic_ipv6_catcher
Create hunting rule
Author:@_lubiedo
Description:ELF samples using IPv6 addresses
Rule name:Linux_Trojan_Gafgyt_33b4111a
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_620087b9
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_807911a2
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_9e9530a7
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_d4227dbf
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_d996d335
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_6a77af0f
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Mirai_e0cf29e2
Create hunting rule
Author:Elastic Security
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 257ae90d3a3a93c93ddfa6a9c7702d35ca382843d8e87ae13e34851bc35a841e

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3714269/
  
Delivery method
Distributed via web download

Comments