MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a92eff9facee7e09d3c4090355af7a0ab3777534d6658b5d44e4b7f475cc2d3a. 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: 8

Intelligence 8 IOCs YARA 2 File information Comments

SHA256 hash:	a92eff9facee7e09d3c4090355af7a0ab3777534d6658b5d44e4b7f475cc2d3a
SHA3-384 hash:	39aa4de5459d1b68b928b8fa7d1f3ee862424218d9bcad5f7f85cf13af6f50171a75a3cc24aa8aa2fdadf73b951547ad
SHA1 hash:	ec865f1d0bd1f9f1ea2939fa6ffae128cf9e04dd
MD5 hash:	20b083478fdafc67d56244980e67c77a
humanhash:	spring-nebraska-timing-fourteen
File name:	nz.sh
Download:	download sample
Signature	Mirai Create hunting rule
File size:	964 bytes
First seen:	2026-07-17 19:40:42 UTC
Last seen:	Never
File type:	sh
MIME type:	text/x-shellscript
ssdeep	12:JCkp0FlkziHkzDX0FlkzLPxHkzLPIhOf0FlkzvHkzlVZX0FlkzHHkznNX0FlkzlX:ItSTfsS3+3IhOESoZPsSwySxTnxTGFC
TLSH	T1A91186C7110503315FA6D9EABBBB455930D0D1DA54C37F6BA898B4E9828ED0CBC42553
TrID	70.0% (.SH) Linux/UNIX shell script (7000/1) 30.0% (.) Unix-like shebang (var.3) (gen) (3000/1)
Magika	shell
Reporter	abuse_ch
Tags:	mirai sh

Shell script dropper

This file seems to be a shell script dropper, using wget, ftpget and/or curl. More information about the corresponding payload URLs are shown below.

URL	Malware sample (SHA256 hash)	Signature	Tags
http://41.216.189.236/nz/nz.x86	7243738e2b27922cd5daed7bb1e9382e87196583976c7a54372f2f149eec3596	Mirai	elf mirai opendir ua-wget x86
http://41.216.189.236/nz/nz.mips	8ebb41b0bfd24c9f2525723c51b6612aade42f84591e2323417636886774d49a	Mirai	elf mips mirai opendir ua-wget
http://41.216.189.236/nz/nz.i686	35866c8dd804e5c6cdadceef84051cd22dae0156a5719877d5447cf08bda137e	Mirai	elf mirai opendir ua-wget x86
http://41.216.189.236/nz/nz.x86_64	426f394fee5882b8d70b37c6fc8ca9ba1ce3bb6eb7573550b6b55c16d343788a	Mirai	elf mirai opendir ua-wget x86
http://41.216.189.236/nz/nz.mpsl	26228ffd4024016f5ac1391601ef229bfddd2a7a365875bc44605ee9aab6e6cf	Mirai	elf mips mirai opendir ua-wget

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

Sanesecurity.Malware.30790.LX.BOT.UNOFFICIAL

SecuriteInfo.com.Linux.Downloader-29.UNOFFICIAL

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

busybox downloader evasive

Link:

https://www.filescan.io/uploads/6a5a854506e32be2969a6d32/reports/1f2c2ac3-3463-439f-a694-0f93e176ab12/overview

Verdict:

Malicious

File Type:

unix shell

First seen:

2026-07-17T17:12:00Z UTC

Last seen:

2026-07-18T19:10:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/a92eff9facee7e09d3c4090355af7a0ab3777534d6658b5d44e4b7f475cc2d3a/results?tab=lookup

Status:

terminated

Link:

https://sandbox.kunai.rocks/analysis/8659a8f0-4ecb-4717-a73b-922e4c55cec2

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/a92eff9facee7e09d3c4090355af7a0ab3777534d6658b5d44e4b7f475cc2d3a

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a92eff9facee7e09d3c4090355af7a0ab3777534d6658b5d44e4b7f475cc2d3a/

Threat name:

Linux.Downloader.Medusa

Status:

Malicious

First seen:

2026-07-17 20:16:33 UTC

AV detection:

15 of 24 (62.50%)

Threat level:

3/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=vexp7h5m5z7atu6ebebvll32bkzxo5ju2zsywxke4s37i5omfu5a._file

Result

Malware family:

mirai

Score:

10/10

Tags:

family:mirai antivm botnet defense_evasion discovery linux

Link:

https://tria.ge/reports/260717-yd1hmscv4k/

Behaviour

Reads runtime system information

System Network Configuration Discovery

Writes file to tmp directory

Checks CPU configuration

Enumerates running processes

Writes file to system bin folder

File and Directory Permissions Modification

Modifies Watchdog functionality

Family: Mirai

Malware Config

C2 Extraction:

cgur743.freedynamicdns.org

Malware family:

Mirai

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/a92eff9facee/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Suspicious File

Score:

0.39

Link:

https://yomi.yoroi.company/submissions/a92eff9facee7e09d3c4090355af7a0ab3777534d6658b5d44e4b7f475cc2d3a

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:	ach_202412_suspect_bash_script Create hunting rule
Author:	abuse.ch
Description:	Detects suspicious Linux bash scripts

Rule name:	MAL_Linux_IoT_MultiArch_BotnetLoader_Generic Create hunting rule
Author:	Anish Bogati
Description:	Technique-based detection of IoT/Linux botnet loader shell scripts downloading binaries from numeric IPs, chmodding, and executing multi-architecture payloads
Reference:	MalwareBazaar sample lilin.sh