MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 91fa1ef98caaf8740e666935ffdcfbe93085a6a02398b5fecb188a02031b393c. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 91fa1ef98caaf8740e666935ffdcfbe93085a6a02398b5fecb188a02031b393c
SHA3-384 hash: 006ec1777273a5c51f6da0fb2245bd9aa36c4f876eee19f41825d368e577bb1f8a1b68b6d3203bd2914ea5d2d82e6ff2
SHA1 hash: c3dd9dbd38ea78ea27c2494f98b31db9d98b624a
MD5 hash: b0dedca22277d75afd198dc37e500a7a
humanhash: chicken-angel-fifteen-fish
File name:putita.mips
Download: download sample
Signature Mirai
Create hunting rule
File size:99'028 bytes
First seen:2026-08-25 21:05:18 UTC
Last seen:Never
File type: elf
MIME type:application/x-sharedlib
ssdeep 3072:hlx41noj9Qvj5f9ZjrkNhy4Bmal8YuYmJt:h7LhQv1Aamc7t
TLSH T134A31276CB7C1034E282A6B00FC447492652F7073637A6BDF0DAE51D29B1E638299B6C
Magika elf
Reporter abuse_ch
Tags:elf UPX
File size (compressed) :99'028 bytes
File size (de-compressed) :206'412 bytes
Format:linux/mips
Unpacked file: 03c1a932ee59cf97ca66760fbd64d5ff7ac9598113a3aea82d2a7a9cb486c64d

Intelligence

File Origin
# of uploads :
1
# of downloads :
32
Origin country :
DE DE
Vendor Threat Intelligence
Details
Link:
https://research.acce.ciphertechsolutions.com/results/46fdfd2b-086d-403b-b4ce-5a044de7cb61/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file
Sets a written file as executable
Runs as daemon
Creates or modifies symbolic links
Changes the time when the file was created, accessed, or modified
Opens a port
Connection attempt
Launching a process
Changes access rights for a written file
Writes files to system directory
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
Creates or modifies files to set up autorun
Creates or modifies symbolic links in /init.d to set up autorun
Deleting of the original file
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/a54e651f-33c3-408a-90af-118f58ea4bad
Behavior Graph:
Download SVG
%3 guuid=aaa3dbd1-1600-0000-f9ec-16eb6f0d0000 pid=3439 /usr/bin/sudo guuid=b266edd4-1600-0000-f9ec-16eb730d0000 pid=3443 /tmp/sample.bin guuid=aaa3dbd1-1600-0000-f9ec-16eb6f0d0000 pid=3439->guuid=b266edd4-1600-0000-f9ec-16eb730d0000 pid=3443 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/97248442-6b9d-46ff-8d6b-419385e91e42
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/1963711
Signature
Drops files in suspicious directories
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
Protects files from modification
Sample deletes itself
Sample is packed with UPX
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
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1963711 Sample: putita.mips.elf Startdate: 25/08/2026 Architecture: LINUX Score: 88 49 64.89.163.215, 36078, 36080, 36082 NETIFACE-TORONTO-NetifaceAmericaIncUS Germany 2->49 53 Multi AV Scanner detection for submitted file 2->53 55 Sample is packed with UPX 2->55 9 putita.mips.elf 2->9         started        signatures3 process4 file5 41 /usr/lib/kworker-helper, ELF 9->41 dropped 43 /root/.bashrc, ASCII 9->43 dropped 45 /etc/systemd/system/kworker-helper.service, ASCII 9->45 dropped 47 3 other malicious files 9->47 dropped 63 Sample tries to set files in /etc globally writable 9->63 65 Sample tries to persist itself using /etc/profile 9->65 67 Drops files in suspicious directories 9->67 69 3 other signatures 9->69 13 putita.mips.elf sh 9->13         started        15 putita.mips.elf sh 9->15         started        17 putita.mips.elf chattr 9->17         started        20 6 other processes 9->20 signatures6 process7 signatures8 22 sh crontab 13->22         started        26 sh 13->26         started        28 sh crontab 15->28         started        51 Protects files from modification 17->51 30 putita.mips.elf 20->30         started        32 putita.mips.elf 20->32         started        34 putita.mips.elf 20->34         started        process9 file10 39 /var/spool/cron/crontabs/tmp.dWaUVu, ASCII 22->39 dropped 59 Sample tries to persist itself using cron 22->59 61 Executes the "crontab" command typically for achieving persistence 22->61 36 sh crontab 26->36         started        signatures11 process12 signatures13 57 Executes the "crontab" command typically for achieving persistence 36->57
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/91fa1ef98caaf8740e666935ffdcfbe93085a6a02398b5fecb188a02031b393c
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/91fa1ef98caaf8740e666935ffdcfbe93085a6a02398b5fecb188a02031b393c/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=sh5b56mmvl4hidtgne277xh35eyiljvaeomll7wldcfaeay3he6a._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
defense_evasion discovery execution persistence privilege_escalation upx
Link:
https://tria.ge/reports/260825-zxcflaygpa/
Behaviour
Reads runtime system information
System Network Configuration Discovery
Changes its process name
Modifies Bash startup script
UPX packed file
Creates/modifies Cron job
Creates/modifies environment variables
Modifies init.d
Modifies rc script
Modifies systemd
Deletes itself
Please note that we are no longer able to provide a coverage score for Virus Total.

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_arm_mips_ko_so
Create hunting rule
Rule name:SUSP_ELF_LNX_UPX_Compressed_File
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects a suspicious ELF binary with UPX compression
Reference:Internal Research
Rule name:upx_packed_elf_v1
Create hunting rule
Author:RandomMalware

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

Mirai

elf 91fa1ef98caaf8740e666935ffdcfbe93085a6a02398b5fecb188a02031b393c

(this sample)

Mirai

elf 03c1a932ee59cf97ca66760fbd64d5ff7ac9598113a3aea82d2a7a9cb486c64d

  
Dropping
SHA256 03c1a932ee59cf97ca66760fbd64d5ff7ac9598113a3aea82d2a7a9cb486c64d
  
Dropping
MD5 e1321938ab2b267b3e02ecc9badb58dd
  
URLhaus
https://urlhaus.abuse.ch/url/3892123/
  
Delivery method
Distributed via web download

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