MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 81fe91716b2cf8a797c5946a1a395b6338ea2da4ddf891812ebac767fbee6841. 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
| SHA256 hash: | 81fe91716b2cf8a797c5946a1a395b6338ea2da4ddf891812ebac767fbee6841 |
|---|---|
| SHA3-384 hash: | 6fee068860e50221aa54604c540286a53c90e07de1837256c44fccbc06124b0f036f0f161adabffeb86b81dc12d36aab |
| SHA1 hash: | e54afb27968ed173dee72fad609be751ed39e801 |
| MD5 hash: | cf2612f06461d86074719a69d2e26e3c |
| humanhash: | may-quiet-jupiter-arizona |
| File name: | x86_64.uhavenobotsxd |
| Download: | download sample |
| Signature | Mirai |
| File size: | 95'888 bytes |
| First seen: | 2025-12-24 12:42:43 UTC |
| Last seen: | Never |
| File type: | elf |
| MIME type: | application/x-executable |
| ssdeep | 1536:ibyzFwokKNPG8n1HAu41BqB/um1RZy/Cxre6IGFle:ibyqorG041Bqom1RZySrHpc |
| TLSH | T104935B01B7C0DCFDD88AD23856AF7276C921F42D1231725B97C4FE266D8EE113B2A295 |
| telfhash | t1ad31de712e492854a1fba675f307f586dc23086019f5b1b0ce736de2df95b801d92852 |
| 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 :
35
Origin country :
DEVendor Threat Intelligence
No detections
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
gafgyt mirai
Result
Gathering data
Verdict:
Malicious
File Type:
ELF 64 LE
Detections:
HEUR:Backdoor.Linux.Mirai.b
Status:
terminated
Behavior Graph:
Verdict:
Malicious
Result
Threat name:
n/a
Detection:
malicious
Classification:
spre.troj.evad
Score:
100 / 100
Signature
Connects to many ports of the same IP (likely port scanning)
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'
Writes identical ELF files to multiple locations
Behaviour
Behavior Graph:
Score:
100%
Verdict:
Malware
File Type:
ELF
Verdict:
Malicious
Threat:
Family.MIRAI
Threat name:
Linux.Backdoor.Mirai
Status:
Malicious
First seen:
2025-12-24 12:43:14 UTC
File Type:
ELF64 Little (Exe)
AV detection:
8 of 36 (22.22%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
mirai
Score:
10/10
Tags:
family:mirai botnet defense_evasion discovery linux persistence
Behaviour
Reads runtime system information
Writes file to shm directory
Changes its process name
Deletes log files
Enumerates running processes
Modifies init.d
Modifies rc script
Write file to user bin folder
Executes dropped EXE
Mirai
Mirai family
Verdict:
Malicious
Tags:
trojan gafgyt mirai 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
Malware family:
Mirai
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
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 |
|---|---|
| Author: | Tim Brown @timb_machine |
| Description: | Enterprise apps |
| Rule name: | linux_generic_ipv6_catcher |
|---|---|
| Author: | @_lubiedo |
| Description: | ELF samples using IPv6 addresses |
| Rule name: | Linux_Trojan_Gafgyt_33b4111a |
|---|---|
| Author: | Elastic Security |
| Rule name: | Linux_Trojan_Gafgyt_620087b9 |
|---|---|
| Author: | Elastic Security |
| Rule name: | Linux_Trojan_Gafgyt_807911a2 |
|---|---|
| Author: | Elastic Security |
| Rule name: | Linux_Trojan_Gafgyt_9e9530a7 |
|---|---|
| Author: | Elastic Security |
| Rule name: | Linux_Trojan_Gafgyt_d4227dbf |
|---|---|
| Author: | Elastic Security |
| Rule name: | Linux_Trojan_Gafgyt_d996d335 |
|---|---|
| Author: | Elastic Security |
| Rule name: | Linux_Trojan_Mirai_6a77af0f |
|---|---|
| Author: | Elastic Security |
| Rule name: | Linux_Trojan_Mirai_e0cf29e2 |
|---|---|
| Author: | Elastic Security |
| Rule name: | unixredflags3 |
|---|---|
| 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
Delivery method
Distributed via web download
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