MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 85fbf87776219b69634250ea5920208a67f808eb85c0ea8201cefe934ac005f8. 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: 85fbf87776219b69634250ea5920208a67f808eb85c0ea8201cefe934ac005f8
SHA3-384 hash: 833a3918f8a02a8e3d1cc7791eae4f675b40f4b468fc0ec8d5fba81e18e46a8011cf6cc2652547053deb97327350b999
SHA1 hash: 6f28a0e22c781e1a404068714f16f38e50b41029
MD5 hash: 312b957e8841c008abcbb5f642c25c87
humanhash: glucose-fix-fruit-stream
File name:Polar.arm7
Download: download sample
Signature Mirai
Create hunting rule
File size:90'556 bytes
First seen:2025-11-18 17:23:07 UTC
Last seen:2025-11-18 17:35:06 UTC
File type: elf
MIME type:application/x-executable
ssdeep 1536:1noCgUR+mZ6ZOSSX1Yh+8NGnbbuHJFoWtTLeefCaIbQhkUH6g4M71LJ2:1noCf+xODihcbxQTLe4CKmUH6g4se
TLSH T1DD930211A1C198AB6FF6AD642EF3F80579718F79D1A4722120F902387F631E65E289D3
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 UPX
File size (compressed) :90'556 bytes
File size (de-compressed) :251'908 bytes
Format:linux/arm
Unpacked file: cfeb62389b127f7be95ffdc36f0fece427e505f4cfe0fe9c26d67798b3807cd5

Intelligence

File Origin
# of uploads :
2
# of downloads :
39
Origin country :
DE DE
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Linux.Siggen.9999.9174.9006.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Connection attempt
Sends data to a server
Receives data from a server
Runs as daemon
Opens a port
Verdict:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
masquerade mirai packed upx
Link:
https://www.filescan.io/uploads/691caba856cb9be853a744cc/reports/1d5bb3a5-22d3-401c-9ddd-1c11e4bf0720/overview
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
arm
Packer:
UPX
Botnet:
unknown
Number of open files:
48
Number of processes launched:
5
Processes remaning?
false
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/85fbf87776219b69634250ea5920208a67f808eb85c0ea8201cefe934ac005f8
Behaviour
Information Gathering
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2025-11-16T20:13:00Z UTC
Last seen:
2025-11-19T18:18:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/85fbf87776219b69634250ea5920208a67f808eb85c0ea8201cefe934ac005f8/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/df8e8a97-2069-4bdf-9c47-2a9753061fa1
Behavior Graph:
Download SVG
%3 guuid=9e348af1-1a00-0000-9781-4342fd090000 pid=2557 /usr/bin/sudo guuid=992f57f4-1a00-0000-9781-4342020a0000 pid=2562 /tmp/sample.bin guuid=9e348af1-1a00-0000-9781-4342fd090000 pid=2557->guuid=992f57f4-1a00-0000-9781-4342020a0000 pid=2562 execve
Malware family:
Mirai
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/337856ea-cd2b-495e-8e8e-441f314a4ade
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
60 / 100
Link:
https://www.joesandbox.com/analysis/1816410
Signature
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sample is packed with UPX
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1816410 Sample: Polar.arm7.elf Startdate: 18/11/2025 Architecture: LINUX Score: 60 22 169.254.169.254, 80 USDOSUS Reserved 2->22 24 65.222.202.53, 80 CAPEREGIONALHEALTHSYSTEMUS United States 2->24 26 daisy.ubuntu.com 2->26 28 Malicious sample detected (through community Yara rule) 2->28 30 Multi AV Scanner detection for submitted file 2->30 32 Sample is packed with UPX 2->32 8 Polar.arm7.elf 2->8         started        10 python3.8 dpkg 2->10         started        signatures3 process4 process5 12 Polar.arm7.elf 8->12         started        14 Polar.arm7.elf 8->14         started        16 Polar.arm7.elf 8->16         started        process6 18 Polar.arm7.elf 12->18         started        20 Polar.arm7.elf 12->20         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/85fbf87776219b69634250ea5920208a67f808eb85c0ea8201cefe934ac005f8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/85fbf87776219b69634250ea5920208a67f808eb85c0ea8201cefe934ac005f8/
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2025-11-18 17:23:43 UTC
File Type:
ELF32 Little (Exe)
AV detection:
15 of 24 (62.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qx57q53wegnwsy2ckdvfsibarjt7qchlqxaovaqbz37jgswaax4a._file
Result
Malware family:
mirai
Create hunting rule
Score:
  10/10
Tags:
family:mirai botnet defense_evasion discovery upx
Link:
https://tria.ge/reports/251118-vyej5axlh1/
Behaviour
Reads runtime system information
Enumerates running processes
Writes file to system bin folder
Modifies Watchdog functionality
Mirai
Mirai family
Malware Config
C2 Extraction:
uraniumc2.ddns.net
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/141e2363-0351-49fc-ac9e-3df1e4e6a56b
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/85fbf87776219b69634250ea5920208a67f808eb85c0ea8201cefe934ac005f8

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:linux_generic_ipv6_catcher
Create hunting rule
Author:@_lubiedo
Description:ELF samples using IPv6 addresses
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 85fbf87776219b69634250ea5920208a67f808eb85c0ea8201cefe934ac005f8

(this sample)

Mirai

elf cfeb62389b127f7be95ffdc36f0fece427e505f4cfe0fe9c26d67798b3807cd5

  
URLhaus
https://urlhaus.abuse.ch/url/3711449/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3711457/
  
Dropping
SHA256 cfeb62389b127f7be95ffdc36f0fece427e505f4cfe0fe9c26d67798b3807cd5
  
Dropping
MD5 b5e09ae2d57b5f883186fb0d4f7bff89

Comments