MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b3b1aac0aa547ef81422cca542cbf68296dd8b7564b2795dd5ce6dd70fb033a3. 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: 14


Intelligence 14 IOCs YARA 9 File information Comments
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SHA256 hash: b3b1aac0aa547ef81422cca542cbf68296dd8b7564b2795dd5ce6dd70fb033a3
SHA3-384 hash: c6910f8d5eb43e206e6f911c04c84119159c5da24c4fdc08a44bee49f3eb568a799883a49345fbd8807b9730aa6dc85b
SHA1 hash: f4ed1b422834149114f323274a083001834b0b10
MD5 hash: efe97fa2f5c9fb5dff1505bd7f589db4
humanhash: bacon-ohio-five-missouri
File name:hold.arm7
Download: download sample
Signature Mirai
Create hunting rule
File size:165'963 bytes
First seen:2025-01-27 12:41:52 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 3072:uQjI72ndBNaAuNAkWa99BusHPeq32icuXcEshn147M/9Tksoj/j:uQjI7kGAMAXa99BusHZ32Yohn1wM/9TA
TLSH T1D9F33B46F6804B13C4D6177ABADF42453322A7A493DB730699286FF43F8679F0E63A05
telfhash t16a31fc765b76112a2a62cd689dee6bb6111d96231385ef33ef20c4cc101f09ea53ac0f
Magika elf
Reporter abuse_ch
Tags:elf mirai

Intelligence

File Origin
# of uploads :
1
# of downloads :
72
Origin country :
DE DE
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.29325.LC.Pl.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Linux.Mirai-81.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.30455.LC.BadVar.UNOFFICIAL
Create hunting rule

Unix.Dropper.Mirai-7135906-0
Create hunting rule

Unix.Dropper.Mirai-7135925-0
Create hunting rule

Unix.Dropper.Mirai-7135966-0
Create hunting rule

Unix.Dropper.Mirai-7135979-0
Create hunting rule

Unix.Trojan.Mirai-9760303-0
Create hunting rule

Unix.Trojan.Mirai-9935718-0
Create hunting rule

Unix.Trojan.Mirai-9945193-0
Create hunting rule

Unix.Trojan.Mirai-9946826-0
Create hunting rule

Unix.Dropper.Mirai-10008433-0
Create hunting rule

Unix.Trojan.Mirai-10028946-0
Create hunting rule

Verdict:
Malicious
Score:
90.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67978097752ec6ca68013079linux22vpnfull_triage
Tags:
malware
Result
Verdict:
Malware
Maliciousness:

Behaviour
Connection attempt
DNS request
Launching a process
Receives data from a server
Manages services
Kills processes
Sends data to a server
Opens a port
Creating a file
Sets a written file as executable
Runs as daemon
Substitutes an application name
Creates or modifies files to set up autorun
Creates or modifies files in /init.d to set up autorun
Deleting of the original file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
evasive gcc lolbin masquerade mirai remote
Link:
https://www.filescan.io/uploads/67977f1bc61f1594ee68e767/reports/6c306c2c-de80-47f0-928f-16c2dcf7a4a1/overview
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
arm
Packer:
not packed
Botnet:
unknown
Number of open files:
101
Number of processes launched:
12
Processes remaning?
true
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/b3b1aac0aa547ef81422cca542cbf68296dd8b7564b2795dd5ce6dd70fb033a3
Behaviour
Persistence
Process Renaming
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Result
Verdict:
UNKNOWN
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/7786d5e6-5ad5-499c-9747-623651d5e619
Result
Threat name:
Mirai, Okiru
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1600358
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Connects to many ports of the same IP (likely port scanning)
Contains symbols with names commonly found in malware
Drops files in suspicious directories
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sample deletes itself
Sample tries to kill multiple processes (SIGKILL)
Sample tries to persist itself using /etc/profile
Sample tries to persist itself using System V runlevels
Sample tries to set files in /etc globally writable
Yara detected Mirai
Yara detected Okiru
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1600358 Sample: hold.arm7.elf Startdate: 27/01/2025 Architecture: LINUX Score: 100 159 109.202.202.202, 80 INIT7CH Switzerland 2->159 161 91.189.91.42, 443 CANONICAL-ASGB United Kingdom 2->161 163 2 other IPs or domains 2->163 165 Malicious sample detected (through community Yara rule) 2->165 167 Antivirus detection for dropped file 2->167 169 Antivirus / Scanner detection for submitted sample 2->169 171 6 other signatures 2->171 13 systemd bash 2->13         started        15 hold.arm7.elf 2->15         started        18 systemd snapd-env-generator 2->18         started        20 9 other processes 2->20 signatures3 process4 signatures5 22 bash sh 13->22         started        24 bash wget 13->24         started        191 Sample tries to persist itself using /etc/profile 15->191 193 Drops files in suspicious directories 15->193 195 Sample deletes itself 15->195 197 Sample tries to persist itself using System V runlevels 15->197 26 hold.arm7.elf sh 15->26         started        28 hold.arm7.elf sh 15->28         started        30 hold.arm7.elf 15->30         started        33 3 other processes 15->33 process6 signatures7 35 sh hold.sh4 22->35         started        39 sh hold.arm 22->39         started        41 sh hold.arm5 22->41         started        49 45 other processes 22->49 43 sh chmod 26->43         started        45 sh chmod 28->45         started        189 Sample tries to kill multiple processes (SIGKILL) 30->189 51 3 other processes 30->51 47 sh systemctl 33->47         started        53 2 other processes 33->53 process8 file9 143 /etc/systemd/system/holdservice.service, ASCII 35->143 dropped 145 /etc/rc.local, ASCII 35->145 dropped 147 /etc/profile, ASCII 35->147 dropped 149 /etc/init.d/holdservice, Bourne-Again 35->149 dropped 175 Sample tries to persist itself using /etc/profile 35->175 177 Drops files in suspicious directories 35->177 179 Sample deletes itself 35->179 65 6 other processes 35->65 181 Sample tries to persist itself using System V runlevels 39->181 55 hold.arm sh 39->55         started        57 hold.arm sh 39->57         started        67 4 other processes 39->67 59 hold.arm5 sh 41->59         started        61 hold.arm5 sh 41->61         started        70 4 other processes 41->70 183 Sample tries to set files in /etc globally writable 43->183 151 /tmp/hold.x86_64, ELF 49->151 dropped 153 /tmp/hold.x86, ELF 49->153 dropped 155 /tmp/hold.spc, ELF 49->155 dropped 157 9 other malicious files 49->157 dropped 63 hold.arm7 sh 49->63         started        72 35 other processes 49->72 signatures10 process11 signatures12 74 sh chmod 55->74         started        77 sh chmod 57->77         started        79 sh chmod 59->79         started        81 sh chmod 61->81         started        83 sh chmod 63->83         started        85 8 other processes 65->85 87 6 other processes 67->87 89 6 other processes 70->89 173 Sample tries to kill multiple processes (SIGKILL) 72->173 91 47 other processes 72->91 process13 signatures14 185 Sample tries to set files in /etc globally writable 74->185 93 systemctl systemd-sysv-install 85->93         started        95 systemctl systemd-sysv-install 87->95         started        97 systemctl systemd-sysv-install 89->97         started        187 Sample tries to kill multiple processes (SIGKILL) 91->187 99 systemctl systemd-sysv-install 91->99         started        101 systemctl systemd-sysv-install 91->101         started        103 systemctl systemd-sysv-install 91->103         started        105 3 other processes 91->105 process15 process16 111 3 other processes 93->111 107 systemd-sysv-install update-rc.d 95->107         started        113 2 other processes 95->113 109 systemd-sysv-install update-rc.d 97->109         started        115 2 other processes 97->115 117 3 other processes 99->117 119 3 other processes 101->119 121 3 other processes 103->121 123 9 other processes 105->123 process17 125 update-rc.d systemctl 107->125         started        127 update-rc.d systemctl 109->127         started        129 update-rc.d systemctl 111->129         started        131 update-rc.d systemctl 117->131         started        133 update-rc.d systemctl 119->133         started        135 update-rc.d systemctl 121->135         started        137 update-rc.d systemctl 123->137         started        139 update-rc.d systemctl 123->139         started        141 update-rc.d systemctl 123->141         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b3b1aac0aa547ef81422cca542cbf68296dd8b7564b2795dd5ce6dd70fb033a3
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b3b1aac0aa547ef81422cca542cbf68296dd8b7564b2795dd5ce6dd70fb033a3/
Threat name:
Linux.Backdoor.Mirai
Create hunting rule
Status:
Malicious
First seen:
2025-01-27 12:42:05 UTC
File Type:
ELF32 Little (Exe)
AV detection:
20 of 38 (52.63%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=woy2vqfkkr7pqfbczssufs7wqkln3c3vmszhsxovzzw5od5qgorq._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai botnet:unstable defense_evasion discovery execution persistence privilege_escalation
Link:
https://tria.ge/reports/250127-pxbtysyndy/
Behaviour
Command and Scripting Interpreter: Unix Shell
Reads runtime system information
Writes file to tmp directory
Changes its process name
Modifies Bash startup script
Creates/modifies environment variables
Enumerates running processes
Modifies init.d
Modifies rc script
Modifies systemd
File and Directory Permissions Modification
Deletes itself
Verdict:
Malicious
Tags:
trojan gafgyt Unix.Dropper.Mirai-7135906-0
YARA:
Linux_Trojan_Gafgyt_28a2fe0c Linux_Gafgyt_May_2024
Link:
https://app.threat.zone/submission/d5d4830a-2f55-4c5d-a37b-a4af7b51af2d
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Mirai
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/b3b1aac0aa547ef81422cca542cbf68296dd8b7564b2795dd5ce6dd70fb033a3

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_Mirai
Create hunting rule
Author:NDA0E
Description:Detects multiple Mirai variants
Rule name:Linux_Generic_Threat_3bcc1630
Create hunting rule
Author:Elastic Security
Rule name:Linux_Generic_Threat_8299c877
Create hunting rule
Author:Elastic Security
Rule name:Linux_Trojan_Gafgyt_28a2fe0c
Create hunting rule
Author:Elastic Security
Rule name:MAL_ARM_LNX_Mirai_Mar13_2022
Create hunting rule
Author:Mehmet Ali Kerimoglu a.k.a. CYB3RMX
Description:Detects new ARM Mirai variant
Rule name:setsockopt
Create hunting rule
Author:Tim Brown @timb_machine
Description:Hunts for setsockopt() red flags
Rule name:SUSP_XORed_Mozilla_Oct19
Create hunting rule
Author:Florian Roth
Description:Detects suspicious single byte XORed keyword 'Mozilla/5.0' - it uses yara's XOR modifier and therefore cannot print the XOR key. You can use the CyberChef recipe linked in the reference field to brute force the used key.
Reference:https://gchq.github.io/CyberChef/#recipe=XOR_Brute_Force()
Rule name:SUSP_XORed_Mozilla_RID2DB4
Create hunting rule
Author:Florian Roth
Description:Detects suspicious XORed keyword - Mozilla/5.0
Reference:Internal Research
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 b3b1aac0aa547ef81422cca542cbf68296dd8b7564b2795dd5ce6dd70fb033a3

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3405945/
  
Delivery method
Distributed via web download

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