MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b81b5033f1f46a58cfb53e7b2cd332f337c7d92a3fcf03520ad4ffcd3c49ff3f. 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: 11


Intelligence 11 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b81b5033f1f46a58cfb53e7b2cd332f337c7d92a3fcf03520ad4ffcd3c49ff3f
SHA3-384 hash: b1175796955f79b1f8a1674ff0008317f380ce6ba90f53e1ba2193ac627f844646d092d391d5c7aa7121328f1aab9c28
SHA1 hash: ae17c1a047f840e337420990c9eb06792757c024
MD5 hash: 5ff96d08bd90277ebd35acdd611d2884
humanhash: winter-alabama-ohio-happy
File name:morte.mips
Download: download sample
Signature Mirai
Create hunting rule
File size:43'440 bytes
First seen:2025-09-25 18:14:28 UTC
Last seen:2025-09-25 20:15:45 UTC
File type: elf
MIME type:application/x-executable
ssdeep 768:mOS1KRel/GutHjQIFIvx30WmaSJCqEjMlaKLGxF8Zy0Ku4Jqn9IkHW7c7rorJgGq:ugwlTtivx30+SENMZLK50KnJq9M7tVJ+
TLSH T1C613F23C2319C377FE76C47A5B320FAA2D561B59B891A8416C16F2C24BC98B53D43DCA
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 UPX
File size (compressed) :43'440 bytes
File size (de-compressed) :111'008 bytes
Format:linux/mips
Unpacked file: 1a92097d8741359428ebf58fb8ef75dc8eae602b8ba2a9350048beb8173c20bb

Intelligence

File Origin
# of uploads :
3
# of downloads :
69
Origin country :
DE DE
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Linux.Siggen.9999.14227.3098.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Opens a port
Sends data to a server
Deletes a file
Sets a written file as executable
Receives data from a server
Launching a process
Connection attempt
Runs as daemon
Substitutes an application name
Creates or modifies files in /init.d to set up autorun
Creates or modifies symbolic links in /init.d to set up autorun
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
masquerade mirai packed threat upx
Link:
https://www.filescan.io/uploads/68d589be74e5a28989937134/reports/bed61ac0-955d-4e32-a958-178d4707d9b7/overview
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
mips
Packer:
UPX
Botnet:
unknown
Number of open files:
145
Number of processes launched:
5
Processes remaning?
true
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/b81b5033f1f46a58cfb53e7b2cd332f337c7d92a3fcf03520ad4ffcd3c49ff3f
Behaviour
Persistence
Process Renaming
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Verdict:
Malicious
File Type:
elf.32.be
First seen:
2025-09-21T08:10:00Z UTC
Last seen:
2025-09-21T08:10:00Z UTC
Hits:
~10
Detections:
HEUR:Backdoor.Linux.Mirai.b HEUR:Backdoor.Linux.Gafgyt.bl HEUR:Backdoor.Linux.Gafgyt.bj
Link:
https://opentip.kaspersky.com/b81b5033f1f46a58cfb53e7b2cd332f337c7d92a3fcf03520ad4ffcd3c49ff3f/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/43b14e70-2d58-43de-bad7-76bf2110d7f1
Behavior Graph:
Download SVG
%3 guuid=d92de834-1a00-0000-2388-c1ccb90a0000 pid=2745 /usr/bin/sudo guuid=15ad7f37-1a00-0000-2388-c1ccc10a0000 pid=2753 /tmp/sample.bin guuid=d92de834-1a00-0000-2388-c1ccb90a0000 pid=2745->guuid=15ad7f37-1a00-0000-2388-c1ccc10a0000 pid=2753 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/4d1e7a0d-1b7b-44fc-a4b3-07569a0bb00a
Result
Threat name:
Mirai, Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.evad.mine
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/1784370
Signature
Drops files in suspicious directories
Found strings related to Crypto-Mining
Multi AV Scanner detection for submitted file
Sample deletes itself
Sample is packed with UPX
Sample tries to persist itself using System V runlevels
Sample tries to set files in /etc globally writable
Yara detected Mirai
Yara detected Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1784370 Sample: morte.mips.elf Startdate: 25/09/2025 Architecture: LINUX Score: 88 28 65.222.202.53, 80 CAPEREGIONALHEALTHSYSTEMUS United States 2->28 36 Multi AV Scanner detection for submitted file 2->36 38 Yara detected Mirai 2->38 40 Yara detected Xmrig cryptocurrency miner 2->40 42 Sample is packed with UPX 2->42 10 morte.mips.elf 2->10         started        signatures3 process4 signatures5 46 Found strings related to Crypto-Mining 10->46 13 morte.mips.elf 10->13         started        process6 process7 15 morte.mips.elf 13->15         started        file8 26 /etc/init.d/sysd, POSIX 15->26 dropped 30 Sample tries to set files in /etc globally writable 15->30 32 Drops files in suspicious directories 15->32 34 Sample tries to persist itself using System V runlevels 15->34 19 morte.mips.elf 15->19         started        22 morte.mips.elf sh 15->22         started        signatures9 process10 signatures11 44 Sample deletes itself 19->44 24 sh cp 22->24         started        process12
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b81b5033f1f46a58cfb53e7b2cd332f337c7d92a3fcf03520ad4ffcd3c49ff3f
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b81b5033f1f46a58cfb53e7b2cd332f337c7d92a3fcf03520ad4ffcd3c49ff3f/
Verdict:
Malicious
Threat:
Family.MIRAI
Link:
https://tip.neiki.dev/file/b81b5033f1f46a58cfb53e7b2cd332f337c7d92a3fcf03520ad4ffcd3c49ff3f
Threat name:
Linux.Trojan.Multiverze
Create hunting rule
Status:
Malicious
First seen:
2025-09-21 12:58:28 UTC
File Type:
ELF32 Big (Exe)
AV detection:
19 of 38 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xanvam7r6rvfrt5vhz5szuzs6m34pwjkh7hqguqk2t742pcj747q._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai botnet credential_access discovery persistence upx
Link:
https://tria.ge/reports/250925-w34kgst1ay/
Behaviour
Reads runtime system information
System Network Configuration Discovery
Changes its process name
Reads system network configuration
Reads process memory
Enumerates active TCP sockets
Enumerates running processes
Modifies init.d
Modifies rc script
Deletes itself
Mirai
Mirai family
Verdict:
Unknown
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/c6c5e44b-2dc1-4a33-a35e-217e3ba3c64c
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/b81b5033f1f46a58cfb53e7b2cd332f337c7d92a3fcf03520ad4ffcd3c49ff3f

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:CP_AllMal_Detector
Create hunting rule
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
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 b81b5033f1f46a58cfb53e7b2cd332f337c7d92a3fcf03520ad4ffcd3c49ff3f

(this sample)

Mirai

elf 1a92097d8741359428ebf58fb8ef75dc8eae602b8ba2a9350048beb8173c20bb

  
URLhaus
https://urlhaus.abuse.ch/url/3632056/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3632057/
  
Dropping
SHA256 1a92097d8741359428ebf58fb8ef75dc8eae602b8ba2a9350048beb8173c20bb
  
Dropping
MD5 3bd93cdef1c597b39030fc13517447a0

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