MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b1af0b244ddf47023ad34f14b6ccef5def7ca48d9e027e25db2067234334c7ee. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b1af0b244ddf47023ad34f14b6ccef5def7ca48d9e027e25db2067234334c7ee
SHA3-384 hash: 7083abb569ee04bd6ca7c4d5cf3d757d0e6ab72aa9ab8d83d5feb545cc62258750496de7cd737233e7caf832e049d79e
SHA1 hash: 157a498a4f5dc45962a95d054525b29d44975e81
MD5 hash: 842f349991b426d7e5bab8c107b93a5c
humanhash: undress-lion-louisiana-triple
File name:nklsh4
Download: download sample
Signature Mirai
Create hunting rule
File size:67'836 bytes
First seen:2025-12-22 00:11:42 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 1536:XrSJsob2DG2T1JWUwKjUE0mjCgI8mdMTAbVRy:XRoaikORE0mjR/QMTA
TLSH T1A5639D3AD86A9D94C85C52B5B8B1CB391713600087A22FF799DACA714043DACF69C7FD
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 :
99
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
Sanesecurity.Malware.31075.LX.BOT.UNOFFICIAL
Create hunting rule

Unix.Trojan.Mirai-7755770-0
Create hunting rule

Unix.Trojan.Mirai-9885259-0
Create hunting rule

Unix.Trojan.Mirai-10008934-0
Create hunting rule

Unix.Trojan.Gafgyt-6735924-0
Create hunting rule

Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
mirai
Link:
https://www.filescan.io/uploads/69488cdae126b9ff438b2d49/reports/67c5ee31-a7a2-46f2-a5e1-ae2787b604a0/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2025-12-21T21:31:00Z UTC
Last seen:
2025-12-23T12:48:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/b1af0b244ddf47023ad34f14b6ccef5def7ca48d9e027e25db2067234334c7ee/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/2ea409ee-03bc-4eee-a150-2870c9799a72
Behavior Graph:
Download SVG
%3 guuid=725e6391-1600-0000-182d-ee91e80c0000 pid=3304 /usr/bin/sudo guuid=caba3c93-1600-0000-182d-ee91ef0c0000 pid=3311 /tmp/sample.bin guuid=725e6391-1600-0000-182d-ee91e80c0000 pid=3304->guuid=caba3c93-1600-0000-182d-ee91ef0c0000 pid=3311 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/cf85cc25-d75b-43d2-8671-b9b630c6a49a
Result
Threat name:
n/a
Detection:
malicious
Classification:
troj
Score:
52 / 100
Link:
https://www.joesandbox.com/analysis/1837329
Signature
Connects to many IPs within the same subnet mask (likely port scanning)
Multi AV Scanner detection for submitted file
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1837329 Sample: nklsh4.elf Startdate: 22/12/2025 Architecture: LINUX Score: 52 18 210.99.248.65, 23 NCIA-AS-KRNATIONALINFORMATIONRESOURCESSERVICEKR Korea Republic of 2->18 20 210.99.248.91, 23 NCIA-AS-KRNATIONALINFORMATIONRESOURCESSERVICEKR Korea Republic of 2->20 22 100 other IPs or domains 2->22 24 Multi AV Scanner detection for submitted file 2->24 26 Connects to many IPs within the same subnet mask (likely port scanning) 2->26 8 nklsh4.elf 2->8         started        10 dash rm 2->10         started        12 dash rm 2->12         started        signatures3 process4 process5 14 nklsh4.elf 8->14         started        process6 16 nklsh4.elf 14->16         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b1af0b244ddf47023ad34f14b6ccef5def7ca48d9e027e25db2067234334c7ee
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b1af0b244ddf47023ad34f14b6ccef5def7ca48d9e027e25db2067234334c7ee/
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2025-12-22 00:12:13 UTC
File Type:
ELF32 Little (Exe)
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wgxqwjcn35dqeowtj4klnthplxxxzjentybh4jo3ebtsgqzuy7xa._file
Result
Malware family:
n/a
Score:
  1/10
Tags:
linux
Link:
https://tria.ge/reports/251222-ahcelsvjgm/
Verdict:
Malicious
Tags:
Unix.Trojan.Mirai-7755770-0
YARA:
n/a
Link:
https://app.threat.zone/submission/b58f980c-5e8c-4238-9d29-f0ae7d870252
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/b1af0b244ddf47023ad34f14b6ccef5def7ca48d9e027e25db2067234334c7ee

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: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 b1af0b244ddf47023ad34f14b6ccef5def7ca48d9e027e25db2067234334c7ee

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3739237/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3740370/

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