MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5c72bdfe8c816a153926f00cb2c34c21352570e00a43df9e0fab939cd5a3889b. 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


Threat unknown


Vendor detections: 5


Intelligence 5 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5c72bdfe8c816a153926f00cb2c34c21352570e00a43df9e0fab939cd5a3889b
SHA3-384 hash: c73d20d7d4196ee4396f0ab06c0793a970cb57f3ac2fc648898433e74dc18f6bb0bb13867db59c2fece43d5527b312a6
SHA1 hash: 8f677ecc4912730be9fe34496fe9d3154ed4b733
MD5 hash: e0ab61f53c129c7bf71fd5d691c8556d
humanhash: carbon-zulu-mexico-solar
File name:kworkerd-rcu
Download: download sample
File size:140'188 bytes
First seen:2026-06-21 14:49:36 UTC
Last seen:Never
File type: elf
MIME type:application/x-sharedlib
ssdeep 3072:gDu53z5rFnQHDYPWdKZDmETWKxcTN0LZqO0SDrg:553z5ajOFYEivN0TDrg
TLSH T1D4D313452162FDC9F9AF477824BD3192E4123A80F5DA2D8DFB213ECA8595C09B34D36E
Magika elf
Reporter abuse_ch
Tags:elf UPX
File size (compressed) :140'188 bytes
File size (de-compressed) :351'880 bytes
Format:linux/mipsel
Unpacked file: e2aa280211036f684810d543f375c0d936316411ae4f6c4347baf7527ac3dd31

Intelligence

File Origin
# of uploads :
1
# of downloads :
51
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Opens a port
Collects information on the CPU
Creating a file in the %temp% directory
Changes access rights for a written file
Creating a file
Sends data to a server
Connection attempt
Receives data from a server
Runs as daemon
Sets a written file as executable
Changes the time when the file was created, accessed, or modified
Launching a process
Manages services
Deleting a recently created file
Substitutes an application name
Creates or modifies files in /cron to set up autorun
Deleting of the original file
Verdict:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
packed upx
Link:
https://www.filescan.io/uploads/6a37fa429799578a6c4425f4/reports/c9e2b2ce-0d22-4884-b6c5-995988c30fd8/overview
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/54755c30-99b7-4d94-af7f-62d2617924bd
Behavior Graph:
Download SVG
%3 guuid=433835e1-1900-0000-e0a5-f6a6510c0000 pid=3153 /usr/bin/sudo guuid=5013d9e4-1900-0000-e0a5-f6a6520c0000 pid=3154 /tmp/sample.bin guuid=433835e1-1900-0000-e0a5-f6a6510c0000 pid=3153->guuid=5013d9e4-1900-0000-e0a5-f6a6520c0000 pid=3154 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/f8fd9a3c-c39e-44b6-adbe-dc5cb8eeffcd
Result
Threat name:
Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad.mine
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1931492
Signature
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
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 Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1931492 Sample: kworkerd-rcu.elf Startdate: 21/06/2026 Architecture: LINUX Score: 76 57 api.robotmarkethub.com 2->57 59 91.239.211.89, 34888, 37684, 80 HOSTKEY-ASNL Germany 2->59 63 Yara detected Xmrig cryptocurrency miner 2->63 10 kworkerd-rcu.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 65 Performs DNS TXT record lookups 57->65 process4 signatures5 67 Found strings related to Crypto-Mining 10->67 19 kworkerd-rcu.elf 10->19         started        21 sh wget 13->21         started        24 sh sh 13->24         started        26 sh rm 13->26         started        process6 file7 28 kworkerd-rcu.elf 19->28         started        51 /tmp/..redis-sentinel, Bourne-Again 21->51 dropped process8 file9 55 /var/spool/cron/crontabs/root, ASCII 28->55 dropped 73 Opens /sys/class/net/* files useful for querying network interface information 28->73 75 Sample deletes itself 28->75 77 Sample tries to persist itself using cron 28->77 32 kworkerd-rcu.elf sh 28->32         started        35 kworkerd-rcu.elf sh 28->35         started        37 kworkerd-rcu.elf sh 28->37         started        39 kworkerd-rcu.elf sh 28->39         started        signatures10 process11 signatures12 61 Executes itself again with its parent PID as an argument (indicative of hampering debugging) 32->61 41 sh crontab 32->41         started        45 sh crontab 35->45         started        47 sh systemctl 37->47         started        49 sh systemctl 39->49         started        process13 file14 53 /var/spool/cron/crontabs/tmp.axK6tQ, ASCII 41->53 dropped 69 Sample tries to persist itself using cron 41->69 71 Executes the "crontab" command typically for achieving persistence 41->71 signatures15
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/5c72bdfe8c816a153926f00cb2c34c21352570e00a43df9e0fab939cd5a3889b
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5c72bdfe8c816a153926f00cb2c34c21352570e00a43df9e0fab939cd5a3889b/
Gathering data
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=lrzl37umqfvbkojg6aglfq2mee2sk4habjb57hqpvojzzvndrcnq._file
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery upx
Link:
https://tria.ge/reports/260621-r7ygtadx5r/
Behaviour
Reads runtime system information
Please note that we are no longer able to provide a coverage score for Virus Total.

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_arm_mips_ko_so
Create hunting rule

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

elf 5c72bdfe8c816a153926f00cb2c34c21352570e00a43df9e0fab939cd5a3889b

(this sample)

elf e2aa280211036f684810d543f375c0d936316411ae4f6c4347baf7527ac3dd31

  
URLhaus
https://urlhaus.abuse.ch/url/3868021/
  
Delivery method
Distributed via web download
  
Dropping
SHA256 e2aa280211036f684810d543f375c0d936316411ae4f6c4347baf7527ac3dd31
  
Dropping
MD5 6e7a86a011111da09296728cacf35f52

Comments