MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f27727014a77dac40eabb635f5d083be89378b0dbd29a444acda68e8a43756f2. 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


CoinMiner


Vendor detections: 7


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

SHA256 hash: f27727014a77dac40eabb635f5d083be89378b0dbd29a444acda68e8a43756f2
SHA3-384 hash: 9535f199ddd4aeddeb35c7de1dd3745f07e736edb683961d125d15f78cd7f6d4220a3ac7ec21efcf7179235f6fb5f458
SHA1 hash: 3c9d7a9c6cecf4bd72d17a36515e3a675df1657f
MD5 hash: 1c850747af64c2fce14cf350189ee414
humanhash: magnesium-emma-four-september
File name:kworkerd-rcu
Download: download sample
Signature CoinMiner
Create hunting rule
File size:334'844 bytes
First seen:2026-06-25 18:14:44 UTC
Last seen:Never
File type: elf
MIME type:application/x-sharedlib
ssdeep 6144:Esorky8ZiJ+i2FnN6FTxooedun994zGMz3inOoCUNHYk:1or1EE0cDSGMzSOoCoHYk
TLSH T131644A4EDF750FBFC5AECE3016AE121715DE884A52FA673B61BCCD08B196A0416E3C58
telfhash t1da41e984a83209ef7efb55008c642625c506e625f8b38f20ef18d6c1476842eb64ee4f
Magika elf
Reporter abuse_ch
Tags:CoinMiner elf upx-dec


Avatar
abuse_ch
UPX decompressed file, sourced from SHA256 6dda8bd9e921d845c95831fd24ab7e9172cc2971d3ae6cc5d810e56e979fb763
File size (compressed) :133'700 bytes
File size (de-compressed) :334'844 bytes
Format:linux/mipsel
Packed file: 6dda8bd9e921d845c95831fd24ab7e9172cc2971d3ae6cc5d810e56e979fb763

Intelligence

File Origin
# of uploads :
1
# of downloads :
65
Origin country :
NL NL
Vendor Threat Intelligence
No detections
Detection(s):
Unix.Trojan.Mirai-10058997-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file
DNS request
Changes the time when the file was created, accessed, or modified
Creating a file in the %temp% directory
Changes access rights for a written file
Sends data to a server
Collects information on the CPU
Receives data from a server
Sets a written file as executable
Opens a port
Connection attempt
Runs as daemon
Launching a process
Manages services
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Deleting of the original file
Verdict:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
base64 gcc
Link:
https://www.filescan.io/uploads/6a3d7052365b598224b9b6ee/reports/42d511bc-b34b-43c5-9d3c-05960f0f7d1e/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-06-25T17:08:00Z UTC
Last seen:
2026-06-25T23:19:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/f27727014a77dac40eabb635f5d083be89378b0dbd29a444acda68e8a43756f2/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/474a10cf-5ab7-41df-80da-064af1a45ba2
Behavior Graph:
Download SVG
%3 guuid=c371ce30-1b00-0000-343c-3ba6790a0000 pid=2681 /usr/bin/sudo guuid=5e0d4935-1b00-0000-343c-3ba6820a0000 pid=2690 /tmp/sample.bin guuid=c371ce30-1b00-0000-343c-3ba6790a0000 pid=2681->guuid=5e0d4935-1b00-0000-343c-3ba6820a0000 pid=2690 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/bc7fa260-01ec-418e-b64e-13c462caf37f
Result
Threat name:
Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1933883
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains symbols with names commonly found in malware
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
Executes the "nc" (netcat) command used to establish arbitrary TCP or UDP connections and listens
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
Searches for CPU information (likely indicative of DDoS capability)
Yara detected Xmrig cryptocurrency miner
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1933883 Sample: kworkerd-rcu.elf Startdate: 25/06/2026 Architecture: LINUX Score: 100 84 api.robotmarkethub.com 2->84 86 91.239.211.89, 36048, 36050, 43486 HOSTKEY-ASNL Germany 2->86 88 99 other IPs or domains 2->88 98 Antivirus detection for dropped file 2->98 100 Antivirus / Scanner detection for submitted sample 2->100 102 Yara detected Xmrig cryptocurrency miner 2->102 104 Contains symbols with names commonly found in malware 2->104 12 systemd sh 2->12         started        14 kworkerd-rcu.elf 2->14         started        17 systemd snapd-env-generator 2->17         started        19 3 other processes 2->19 signatures3 106 Performs DNS TXT record lookups 84->106 process4 signatures5 21 sh sh 12->21         started        24 sh wget 12->24         started        26 sh rm 12->26         started        122 Found strings related to Crypto-Mining 14->122 28 kworkerd-rcu.elf 14->28         started        process6 file7 80 /dev/shm/.exectest.6311, POSIX 21->80 dropped 30 sh .d 21->30         started        32 sh wget 21->32         started        36 sh 21->36         started        40 28 other processes 21->40 82 /tmp/..redis-sentinel, POSIX 24->82 dropped 38 kworkerd-rcu.elf 28->38         started        process8 file9 42 .d 30->42         started        74 /dev/shm/.d, ELF 32->74 dropped 90 Drops invisible ELF files 32->90 44 sh grep 36->44         started        47 kworkerd-rcu.elf sh 38->47         started        49 kworkerd-rcu.elf sh 38->49         started        92 Searches for CPU information (likely indicative of DDoS capability) 40->92 94 Sample deletes itself 40->94 96 Executes the "nc" (netcat) command used to establish arbitrary TCP or UDP connections and listens 40->96 signatures10 process11 signatures12 51 .d 42->51         started        120 Searches for CPU information (likely indicative of DDoS capability) 44->120 55 sh systemctl 47->55         started        57 sh systemctl 49->57         started        process13 file14 76 /var/spool/cron/crontabs/root, ASCII 51->76 dropped 108 Opens /sys/class/net/* files useful for querying network interface information 51->108 110 Sample deletes itself 51->110 112 Sample tries to persist itself using cron 51->112 59 .d sh 51->59         started        62 .d sh 51->62         started        64 .d 51->64         started        66 199 other processes 51->66 signatures15 process16 signatures17 118 Executes itself again with its parent PID as an argument (indicative of hampering debugging) 59->118 68 sh crontab 59->68         started        72 sh crontab 62->72         started        process18 file19 78 /var/spool/cron/crontabs/tmp.He2sO6, ASCII 68->78 dropped 114 Sample tries to persist itself using cron 68->114 116 Executes the "crontab" command typically for achieving persistence 68->116 signatures20
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/f27727014a77dac40eabb635f5d083be89378b0dbd29a444acda68e8a43756f2
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f27727014a77dac40eabb635f5d083be89378b0dbd29a444acda68e8a43756f2/
Threat name:
Linux.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2026-06-25 18:15:50 UTC
File Type:
ELF32 Little (SO)
AV detection:
4 of 36 (11.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6j3soakko7nmidvlwy27luedx2etpcynxuu2irfm3juorjbxk3za._file
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/f27727014a77dac40eabb635f5d083be89378b0dbd29a444acda68e8a43756f2

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
Rule name:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
Rule name:setsockopt
Create hunting rule
Author:Tim Brown @timb_machine
Description:Hunts for setsockopt() red flags
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

CoinMiner

elf 6dda8bd9e921d845c95831fd24ab7e9172cc2971d3ae6cc5d810e56e979fb763

CoinMiner

elf f27727014a77dac40eabb635f5d083be89378b0dbd29a444acda68e8a43756f2

(this sample)

  
Dropped by
SHA256 6dda8bd9e921d845c95831fd24ab7e9172cc2971d3ae6cc5d810e56e979fb763
  
URLhaus
https://urlhaus.abuse.ch/url/3868021/
  
Delivery method
Distributed via web download
  
Dropped by
MD5 505d448701ef20edd16392e514c71bf2

Comments