MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2a40bcd3c8f6d6935eceb3b52d321233d5ecb3cee63c68b17495734d66516ad1. 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: 9


Intelligence 9 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2a40bcd3c8f6d6935eceb3b52d321233d5ecb3cee63c68b17495734d66516ad1
SHA3-384 hash: 885c7f2a80c6fa416246d0e05ff8dc215e54de627b26270a009a0838d0723ca673f551fa661f4e3c359183b1553e31e7
SHA1 hash: 81488af55f5af18b41ef89c7fad002209568b949
MD5 hash: aa1f7b5c2039633996a11ed23566022d
humanhash: low-oscar-five-georgia
File name:arm7.uhavenobotsxd
Download: download sample
Signature Mirai
Create hunting rule
File size:123'672 bytes
First seen:2025-11-22 11:21:50 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 3072:J5Lf709WjA9UqxlpRaI7rcuZ156QLt6zm0loqi:J5/TE9UOPRaI7rcuH565zZloqi
TLSH T17DC33B17B9519B11D4D331BAFE9E814933136BF8D3FA71019D20AF6123CA99B0F7A612
telfhash t162e0c055fb822de8c2c7d66a55b6b80dc5f4340f03183087a1e87f07e233140363e852
Magika elf
Reporter abuse_ch
Tags:elf mirai

Intelligence

File Origin
# of uploads :
1
# of downloads :
34
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-10010119-0
Create hunting rule

Unix.Trojan.Mirai-10010127-0
Create hunting rule

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

Result
Verdict:
Malware
Maliciousness:

Behaviour
Connection attempt
Changes access rights for a written file
Changes the time when the file was created, accessed, or modified
Runs as daemon
Deletes a file
Receives data from a server
Creating a file
Kills processes
Opens a port
Deleting a recently created file
Sends data to a server
Launching a process
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
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
android anti-vm gcc mirai rust
Link:
https://www.filescan.io/uploads/69219ced5d3feebe12d787b4/reports/aeee7d35-a594-4dd0-8a97-717e9d0b217b/overview
Result
Gathering data
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/9ec2e981-9e36-4306-8f24-bb866efcc149
Behavior Graph:
Download SVG
%3 guuid=45b61bd2-1600-0000-0d41-85b1140a0000 pid=2580 /usr/bin/sudo guuid=9bdd93d3-1600-0000-0d41-85b11a0a0000 pid=2586 /tmp/sample.bin guuid=45b61bd2-1600-0000-0d41-85b1140a0000 pid=2580->guuid=9bdd93d3-1600-0000-0d41-85b11a0a0000 pid=2586 execve
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/2d648533-2af5-477a-9bf5-ace1afe5bcb5
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/1819040
Signature
Drops files in suspicious directories
Drops invisible ELF files
Executes the "crontab" command typically for achieving persistence
Modifies the '.bashrc' or '.bash_profile' file typically for persisting actions
Multi AV Scanner detection for submitted file
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
Writes identical ELF files to multiple locations
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1819040 Sample: arm7.uhavenobotsxd.elf Startdate: 22/11/2025 Architecture: LINUX Score: 88 61 94.154.35.153, 33876, 6969 SELECTELRU Ukraine 2->61 63 Multi AV Scanner detection for submitted file 2->63 10 arm7.uhavenobotsxd.elf 2->10         started        signatures3 process4 signatures5 67 Sample reads /proc/mounts (often used for finding a writable filesystem) 10->67 13 arm7.uhavenobotsxd.elf 10->13         started        process6 file7 53 /var/spool/cron/root, ASCII 13->53 dropped 55 /var/spool/cron/crontabs/root, ASCII 13->55 dropped 57 /root/.bashrc, ASCII 13->57 dropped 59 5 other malicious files 13->59 dropped 81 Sample tries to persist itself using /etc/profile 13->81 83 Drops files in suspicious directories 13->83 85 Modifies the '.bashrc' or '.bash_profile' file typically for persisting actions 13->85 87 3 other signatures 13->87 17 arm7.uhavenobotsxd.elf sh 13->17         started        19 arm7.uhavenobotsxd.elf sh 13->19         started        21 arm7.uhavenobotsxd.elf sh 13->21         started        23 2 other processes 13->23 signatures8 process9 signatures10 26 sh cp 17->26         started        30 sh crontab 19->30         started        32 sh 19->32         started        34 sh cp 21->34         started        65 Sample tries to kill multiple processes (SIGKILL) 23->65 36 arm7.uhavenobotsxd.elf sh 23->36         started        38 arm7.uhavenobotsxd.elf sh 23->38         started        40 arm7.uhavenobotsxd.elf sh 23->40         started        42 arm7.uhavenobotsxd.elf 23->42         started        process11 file12 47 /usr/bin/.sh, ELF 26->47 dropped 69 Writes identical ELF files to multiple locations 26->69 71 Drops invisible ELF files 26->71 73 Drops files in suspicious directories 26->73 49 /var/spool/cron/crontabs/tmp.Vk9Cjs, ASCII 30->49 dropped 75 Sample tries to persist itself using cron 30->75 77 Executes the "crontab" command typically for achieving persistence 30->77 44 sh crontab 32->44         started        51 /boot/.systemd, ELF 34->51 dropped signatures13 process14 signatures15 79 Executes the "crontab" command typically for achieving persistence 44->79
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/2a40bcd3c8f6d6935eceb3b52d321233d5ecb3cee63c68b17495734d66516ad1
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/2a40bcd3c8f6d6935eceb3b52d321233d5ecb3cee63c68b17495734d66516ad1/
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2025-11-22 12:46:25 UTC
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fjalzu6i63ljgxwowo2s2mqsgpk6zm6o4y6grmlusvzu2zsrnliq._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai botnet defense_evasion discovery execution persistence privilege_escalation
Link:
https://tria.ge/reports/251122-ngs8mawldy/
Behaviour
Command and Scripting Interpreter: Unix Shell
Reads runtime system information
Writes file to shm directory
Changes its process name
Modifies Bash startup script
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
Mirai
Mirai family
Verdict:
Malicious
Tags:
Unix.Trojan.Mirai-10001386-0
YARA:
n/a
Link:
https://app.threat.zone/submission/e33ceba0-e9e8-45e9-bc16-68d9cb2c4571
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/2a40bcd3c8f6d6935eceb3b52d321233d5ecb3cee63c68b17495734d66516ad1

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:ach_202503_elf_Mirai
Create hunting rule
Author:abuse.ch
Description:Detects Mirai 'TSource' ELF files
Rule name:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
Rule name:Linux_Generic_Threat_8299c877
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 2a40bcd3c8f6d6935eceb3b52d321233d5ecb3cee63c68b17495734d66516ad1

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3686384/
  
Delivery method
Distributed via web download

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