MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b7df3e2020c12c1359090dca42a5b341ce3609778711864ad79c19aafbe9487d. 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: b7df3e2020c12c1359090dca42a5b341ce3609778711864ad79c19aafbe9487d
SHA3-384 hash: b0ca06d710569d8a60385b4c047041ddb68d89075c9b24307c7dcf0b5b793cf070101939e4238912f73dd60c06b41021
SHA1 hash: cc998a9f95a114c6a4f9c09c053cbf3f9e913930
MD5 hash: 23ff57bf449de4239a22ace9b318f215
humanhash: oscar-mango-tennis-three
File name:kworkerd-softirq
Download: download sample
Signature Mirai
Create hunting rule
File size:287'196 bytes
First seen:2026-06-27 17:27:50 UTC
Last seen:2026-06-28 02:28:25 UTC
File type: elf
MIME type:application/x-executable
ssdeep 6144:P5OJGge98Pv9SDoLA9Df4IB0wiX68ncraT6uVZkZ9p5C65Zpev:MPnSDoLMDgIu3XyraTMnp5C6Dp
TLSH T133541916AD419F12C1D112FAFA6E828A33173FB8D2DE7212DD146FA4778A49F0E7B111
telfhash t134d0a7348d99c1f0f2000b5258d93b1186b9c14aba6184c444c46d5c5c638e0a07290e
Magika elf
Reporter abuse_ch
Tags:elf mirai

Intelligence

File Origin
# of uploads :
3
# of downloads :
71
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Linux.Siggen.13228.21733.10568.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Creating a file in the %temp% directory
Kills processes
Creating a file
Changes the time when the file was created, accessed, or modified
Changes access rights for a written file
Sets a written file as executable
Connection attempt
Launching a process
Manages services
Sends data to a server
Runs as daemon
Receives data from a server
Collects information on the CPU
Opens a port
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Creates or modifies files in /init.d to set up autorun
Deleting of the original file
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/b7df3e2020c12c1359090dca42a5b341ce3609778711864ad79c19aafbe9487d/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/aa169dde-aec1-402a-a09b-394c9e42dc0c
Behavior Graph:
Download SVG
%3 guuid=0dbca560-1f00-0000-762b-35e0b2070000 pid=1970 /usr/bin/sudo guuid=fdb9d263-1f00-0000-762b-35e0b9070000 pid=1977 /tmp/sample.bin guuid=0dbca560-1f00-0000-762b-35e0b2070000 pid=1970->guuid=fdb9d263-1f00-0000-762b-35e0b9070000 pid=1977 execve
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/d45b60d6-88bf-4a03-8ec9-086b19d85fb3
Result
Threat name:
Mirai, Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.mine
Score:
60 / 100
Link:
https://www.joesandbox.com/analysis/1934489
Signature
Found strings related to Crypto-Mining
Yara detected Mirai
Yara detected Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1934489 Sample: kworkerd-softirq.elf Startdate: 27/06/2026 Architecture: LINUX Score: 60 17 169.254.169.254, 80 USDOS-USDepartmentofStateUS ZZ 2->17 19 daisy.ubuntu.com 91.189.95.56, 443, 50432 CANONICAL-ASGB United States 2->19 21 Yara detected Mirai 2->21 23 Yara detected Xmrig cryptocurrency miner 2->23 8 kworkerd-softirq.elf 2->8         started        11 python3.8 dpkg 2->11         started        signatures3 process4 signatures5 25 Found strings related to Crypto-Mining 8->25 13 kworkerd-softirq.elf 8->13         started        process6 process7 15 kworkerd-softirq.elf 13->15         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b7df3e2020c12c1359090dca42a5b341ce3609778711864ad79c19aafbe9487d
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b7df3e2020c12c1359090dca42a5b341ce3609778711864ad79c19aafbe9487d/
Threat name:
Linux.Trojan.Qwexlafiba
Create hunting rule
Status:
Malicious
First seen:
2026-06-27 17:29:56 UTC
File Type:
ELF32 Little (Exe)
AV detection:
8 of 23 (34.78%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w7pt4ibayewbgwijbxfefjntihhdmclxq4iymswxtqm2v67jjb6q._file
Result
Malware family:
n/a
Score:
  7/10
Tags:
antivm defense_evasion discovery execution persistence privilege_escalation
Link:
https://tria.ge/reports/260627-v2cjyab13t/
Behaviour
Enumerates kernel/hardware configuration
Reads runtime system information
Writes file to tmp directory
Changes its process name
Checks CPU configuration
Reads system network configuration
Creates/modifies Cron job
Enumerates active TCP sockets
Enumerates running processes
Modifies systemd
Reads MAC address of network interface
Deletes itself
Modifies Watchdog functionality
Unexpected DNS network traffic destination
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/b7df3e2020c12c1359090dca42a5b341ce3609778711864ad79c19aafbe9487d

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 b7df3e2020c12c1359090dca42a5b341ce3609778711864ad79c19aafbe9487d

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3876991/
  
Delivery method
Distributed via web download

Comments