MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1f152c19dab01a8928ac2f7fc48e69c742983e05ce5b98437a88c7f3967854d4. 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: 7


Intelligence 7 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1f152c19dab01a8928ac2f7fc48e69c742983e05ce5b98437a88c7f3967854d4
SHA3-384 hash: 51ee2c1d2c65e80e300d0c5a139c8fd2f28cc4e06cd4ffe7eb8fa75443ba5da88db8170d7f8f4efb3c2a4bca436922df
SHA1 hash: dabd56a3edfa13c3d91ccba1a3db5845f3eb1e4d
MD5 hash: 9392643d268f3d02370be753947c51e1
humanhash: single-december-pip-oscar
File name:kworkerd-writeback
Download: download sample
Signature Mirai
Create hunting rule
File size:278'904 bytes
First seen:2026-07-08 01:25:32 UTC
Last seen:2026-07-08 13:02:08 UTC
File type: elf
MIME type:application/x-executable
ssdeep 6144:fSGhpUkufLSkbp6egFmEGIsBx9c4mFL5FwjcOc0Uo:f3pUk4zbXg0jXcvD6jrUo
TLSH T1FD543A02FB1C0E03E1272EF0263B87F197DFA9A12DB4B640695EBEC54273D71A545AC9
Magika elf
Reporter abuse_ch
Tags:elf mirai

Intelligence

File Origin
# of uploads :
2
# of downloads :
62
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
Unix.Trojan.Mirai-10012200-0
Create hunting rule

Unix.Trojan.Mirai-10012671-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Connection attempt
Kills processes
Opens a port
Changes access rights for a written file
Receives data from a server
Changes the time when the file was created, accessed, or modified
Runs as daemon
Sets a written file as executable
Manages services
Collects information on the CPU
Creating a file
Sends data to a server
Launching a process
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Kills critical processes
Deleting of the original file
Creates or modifies files in /init.d to set up autorun
Verdict:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
base64 gcc
Link:
https://www.filescan.io/uploads/6a4da72c84fca90021cbea72/reports/645ae3cf-8d6c-4ab1-af70-e3d2c7478075/overview
Verdict:
Malicious
File Type:
elf.32.be
First seen:
2026-07-07T16:56:00Z UTC
Last seen:
2026-07-09T12:58:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/1f152c19dab01a8928ac2f7fc48e69c742983e05ce5b98437a88c7f3967854d4/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/f02f2745-8e65-4552-afc1-90d4b16fea84
Behavior Graph:
Download SVG
%3 guuid=06158ed5-1e00-0000-5cd1-636a36140000 pid=5174 /usr/bin/sudo guuid=5e9737d8-1e00-0000-5cd1-636a37140000 pid=5175 /tmp/sample.bin guuid=06158ed5-1e00-0000-5cd1-636a36140000 pid=5174->guuid=5e9737d8-1e00-0000-5cd1-636a37140000 pid=5175 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/80e641c1-2bed-4ab1-a8ff-0eb719a2a449
Result
Threat name:
Mirai, Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1938990
Signature
Antivirus detection for dropped file
Drops invisible ELF files
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
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Opens /sys/class/net/* files useful for querying network interface information
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: 1938990 Sample: kworkerd-writeback.elf Startdate: 08/07/2026 Architecture: LINUX Score: 100 67 91.92.40.118, 443, 53524, 59312 TODYL-CLOUD-TodylIncUS Bulgaria 2->67 73 Malicious sample detected (through community Yara rule) 2->73 75 Antivirus detection for dropped file 2->75 77 Multi AV Scanner detection for submitted file 2->77 79 2 other signatures 2->79 10 kworkerd-writeback.elf 2->10         started        13 systemd sh 2->13         started        15 systemd snapd-env-generator 2->15         started        17 systemd snapd-env-generator 2->17         started        signatures3 process4 signatures5 83 Found strings related to Crypto-Mining 10->83 19 kworkerd-writeback.elf 10->19         started        21 sh sh 13->21         started        23 sh wget 13->23         started        26 sh rm 13->26         started        process6 file7 28 kworkerd-writeback.elf 19->28         started        31 sh wget 21->31         started        34 sh .k 21->34         started        36 sh chmod 21->36         started        63 /tmp/..redis-sentinel, POSIX 23->63 dropped process8 file9 85 Opens /sys/class/net/* files useful for querying network interface information 28->85 87 Sample deletes itself 28->87 38 kworkerd-writeback.elf sh 28->38         started        41 kworkerd-writeback.elf sh 28->41         started        43 kworkerd-writeback.elf sh 28->43         started        45 kworkerd-writeback.elf sh 28->45         started        65 /tmp/.k, ELF 31->65 dropped 89 Drops invisible ELF files 31->89 47 .k 34->47         started        signatures10 process11 signatures12 81 Executes itself again with its parent PID as an argument (indicative of hampering debugging) 38->81 49 sh crontab 38->49         started        53 sh crontab 41->53         started        55 sh systemctl 43->55         started        57 sh systemctl 45->57         started        59 .k 47->59         started        process13 file14 61 /var/spool/cron/crontabs/tmp.IwZr08, ASCII 49->61 dropped 69 Sample tries to persist itself using cron 49->69 71 Executes the "crontab" command typically for achieving persistence 49->71 signatures15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/1f152c19dab01a8928ac2f7fc48e69c742983e05ce5b98437a88c7f3967854d4
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/1f152c19dab01a8928ac2f7fc48e69c742983e05ce5b98437a88c7f3967854d4/
Threat name:
Linux.Trojan.Multiverze
Create hunting rule
Status:
Malicious
First seen:
2026-07-07 20:08:13 UTC
File Type:
ELF32 Big (Exe)
AV detection:
8 of 24 (33.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=d4ksygo2waniskfmf574jdtjy5bjqpqfzznzqq32rdd7hftyktka._file
Result
Malware family:
n/a
Score:
  1/10
Tags:
linux
Link:
https://tria.ge/reports/260708-btf3lshy2l/
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/1f152c19dab01a8928ac2f7fc48e69c742983e05ce5b98437a88c7f3967854d4

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: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 1f152c19dab01a8928ac2f7fc48e69c742983e05ce5b98437a88c7f3967854d4

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3883713/
  
Delivery method
Distributed via web download

Comments