MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 304e7db1072c78f322297554b1c8b7c8f40b017cebf2d5f009e04674e633d92a. 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: 6


Intelligence 6 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 304e7db1072c78f322297554b1c8b7c8f40b017cebf2d5f009e04674e633d92a
SHA3-384 hash: 55b4899c3ed8630e9e72f53ee1eac9418a9e0b297d7699a9391b170c7df507008ddac53291f4515cf47760bdffe6f8d1
SHA1 hash: 1ca2f6cbab1a5b0fba5578b549787190e91f7afa
MD5 hash: d22b33bc23a7c97a5945ce718e416f46
humanhash: batman-connecticut-sad-yellow
File name:kworkerd-crypto
Download: download sample
Signature Mirai
Create hunting rule
File size:241'888 bytes
First seen:2026-06-27 17:28:45 UTC
Last seen:2026-06-28 11:08:22 UTC
File type: elf
MIME type:application/x-executable
ssdeep 6144:Q/EDFp853nMt7u9BNypDIbMaZMrwSPz3E:Q/4Fp853nMxNpDIbvMlg
TLSH T10C347D63D936AF96C022A8F4B1F2DF780F12BD6789071E99D576EAB08093DC9B501374
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 :
5
# of downloads :
89
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
Unix.Dropper.Mirai-7136288-0
Create hunting rule

Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
base64 dropper expand gcc lolbin mirai
Link:
https://www.filescan.io/uploads/6a40087e77dd381e3dc51d77/reports/efa5fcf8-092e-4fa7-891c-b2d5d1917a80/overview
Verdict:
Unknown
File Type:
elf.32.le
First seen:
2026-06-27T14:52:00Z UTC
Last seen:
2026-06-29T00:25:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/304e7db1072c78f322297554b1c8b7c8f40b017cebf2d5f009e04674e633d92a/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/97dc3938-5d90-4724-aa61-37c8a9fdb1d8
Behavior Graph:
Download SVG
%3 guuid=5d140e58-2300-0000-ced8-50e77c0d0000 pid=3452 /usr/bin/sudo guuid=59011c5a-2300-0000-ced8-50e77d0d0000 pid=3453 /tmp/sample.bin guuid=5d140e58-2300-0000-ced8-50e77c0d0000 pid=3452->guuid=59011c5a-2300-0000-ced8-50e77d0d0000 pid=3453 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/f45c8b55-c2db-4dd6-9ea1-3192e593d7c6
Result
Threat name:
Mirai, Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1934486
Signature
Antivirus / Scanner detection for submitted sample
Executes itself again with its parent PID as an argument (indicative of hampering debugging)
Executes the "crontab" command typically for achieving persistence
Found strings related to Crypto-Mining
Multi AV Scanner detection for submitted file
Opens /sys/class/net/* files useful for querying network interface information
Performs DNS TXT record lookups
Sample deletes itself
Sample tries to persist itself using cron
Yara detected Mirai
Yara detected Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1934486 Sample: kworkerd-crypto.elf Startdate: 27/06/2026 Architecture: LINUX Score: 100 51 nzr.narxzz.biz.id 2->51 53 nzr.narxzz.biz.id 103.253.212.175, 42488, 6868 CRI-AS-APCVRumahwebIndonesiaID Indonesia 2->53 55 5 other IPs or domains 2->55 57 Antivirus / Scanner detection for submitted sample 2->57 59 Multi AV Scanner detection for submitted file 2->59 61 Yara detected Mirai 2->61 63 Yara detected Xmrig cryptocurrency miner 2->63 10 kworkerd-crypto.elf 2->10         started        13 systemd sh 2->13         started        15 systemd snapd-env-generator 2->15         started        17 3 other processes 2->17 signatures3 65 Performs DNS TXT record lookups 51->65 process4 signatures5 71 Found strings related to Crypto-Mining 10->71 19 kworkerd-crypto.elf 10->19         started        21 sh wget 13->21         started        23 sh sh 13->23         started        25 sh rm 13->25         started        process6 process7 27 kworkerd-crypto.elf 19->27         started        signatures8 73 Opens /sys/class/net/* files useful for querying network interface information 27->73 75 Sample deletes itself 27->75 30 kworkerd-crypto.elf sh 27->30         started        33 kworkerd-crypto.elf sh 27->33         started        35 kworkerd-crypto.elf sh 27->35         started        37 kworkerd-crypto.elf sh 27->37         started        process9 signatures10 77 Executes itself again with its parent PID as an argument (indicative of hampering debugging) 30->77 39 sh crontab 30->39         started        43 sh crontab 33->43         started        45 sh systemctl 35->45         started        47 sh systemctl 37->47         started        process11 file12 49 /var/spool/cron/crontabs/tmp.uTzCBZ, ASCII 39->49 dropped 67 Sample tries to persist itself using cron 39->67 69 Executes the "crontab" command typically for achieving persistence 39->69 signatures13
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/304e7db1072c78f322297554b1c8b7c8f40b017cebf2d5f009e04674e633d92a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/304e7db1072c78f322297554b1c8b7c8f40b017cebf2d5f009e04674e633d92a/
Threat name:
Linux.Worm.Mirai
Create hunting rule
Status:
Malicious
First seen:
2026-06-27 17:31:04 UTC
File Type:
ELF32 Little (Exe)
AV detection:
14 of 23 (60.87%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=gbhh3mihfr4pgirjovkldsfxzd2awal45pznl4aj4bdhjzrt3eva._file
Result
Malware family:
n/a
Score:
  1/10
Tags:
linux
Link:
https://tria.ge/reports/260627-v2v2aacw6k/
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/304e7db1072c78f322297554b1c8b7c8f40b017cebf2d5f009e04674e633d92a

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:ELF_Toriilike_persist
Create hunting rule
Author:4r4
Description:Detects Torii IoT Botnet (stealthier Mirai alternative)
Reference:Identified via researched data
Rule name:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
Rule name:linux_generic_ipv6_catcher
Create hunting rule
Author:@_lubiedo
Description:ELF samples using IPv6 addresses
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:TH_Generic_MassHunt_Linux_Malware_2026_CYFARE
Create hunting rule
Author:CYFARE
Description:Generic Linux malware mass-hunt rule - 2026
Reference:https://cyfare.net/
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 304e7db1072c78f322297554b1c8b7c8f40b017cebf2d5f009e04674e633d92a

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3876996/
  
Delivery method
Distributed via web download

Comments