MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5e78e6c39fb638de7536bbf6ceb21ebb6ae852f190447edb751c3a422544e780. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5e78e6c39fb638de7536bbf6ceb21ebb6ae852f190447edb751c3a422544e780
SHA3-384 hash: b4ac813cb5c15de623666d099432a127a0b8a70a7de8a87058e3705905f1627b122977728e40e6cbdd4bef3649dc1306
SHA1 hash: fbb75aa50bd9b77a5dde9b512d61b05116235989
MD5 hash: 0ed8a6fa5fe633a3426db02b1bd67230
humanhash: social-sweet-friend-blossom
File name:kworkerd-writeback
Download: download sample
Signature CoinMiner
Create hunting rule
File size:329'172 bytes
First seen:2026-06-25 18:58:40 UTC
Last seen:Never
File type: elf
MIME type:application/x-sharedlib
ssdeep 6144:r/RV83+wQUKodT6qTBNPw0XGRCVWfaxuJ9RpAG5zRYQ2fDZTkHY:/3R4ctMf9TkHY
TLSH T138644B03FF445A43C5811FB15D7B07B6A3AD44816CA9F03D9D0ABF2506B38BAA5DB388
Magika elf
Reporter abuse_ch
Tags:CoinMiner elf upx-dec


Avatar
abuse_ch
UPX decompressed file, sourced from SHA256 bb885bf6e5cf58dfa576c8bdd006f80c779ae33a446fc152652eac71ed8db27d
File size (compressed) :110'728 bytes
File size (de-compressed) :329'172 bytes
Format:linux/ppc32
Packed file: bb885bf6e5cf58dfa576c8bdd006f80c779ae33a446fc152652eac71ed8db27d

Intelligence

File Origin
# of uploads :
1
# of downloads :
74
Origin country :
NL NL
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Linux.BackDoor.Armada.1.7870.11681.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Creating a file in the %temp% directory
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
Kills critical processes
Creates or modifies files in /init.d to set up autorun
Deleting of the original file
Verdict:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
base64 gcc
Link:
https://www.filescan.io/uploads/6a3d7a969fbf94c61a7d3d2d/reports/4bdf7374-598b-4f99-a5b3-c4ba87863efd/overview
Verdict:
Malicious
File Type:
elf.32.be
First seen:
2026-06-25T17:09:00Z UTC
Last seen:
2026-06-25T17:34:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/5e78e6c39fb638de7536bbf6ceb21ebb6ae852f190447edb751c3a422544e780/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/2f860b8c-68f7-4e4b-8ebd-b5def0eec0e9
Behavior Graph:
Download SVG
%3 guuid=ff077de8-1e00-0000-ed18-f4b737140000 pid=5175 /usr/bin/sudo guuid=ff86d3ea-1e00-0000-ed18-f4b738140000 pid=5176 /tmp/sample.bin guuid=ff077de8-1e00-0000-ed18-f4b737140000 pid=5175->guuid=ff86d3ea-1e00-0000-ed18-f4b738140000 pid=5176 execve
Gathering data
Result
Threat name:
Xmrig
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad.mine
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1933926
Signature
Antivirus / Scanner detection for submitted sample
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
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: 1933926 Sample: kworkerd-writeback.elf Startdate: 25/06/2026 Architecture: LINUX Score: 100 80 api.robotmarkethub.com 2->80 82 91.239.211.89, 34886, 34888, 37686 HOSTKEY-ASNL Germany 2->82 96 Antivirus detection for dropped file 2->96 98 Antivirus / Scanner detection for submitted sample 2->98 100 Yara detected Xmrig cryptocurrency miner 2->100 12 systemd sh 2->12         started        14 kworkerd-writeback.elf 2->14         started        17 systemd snapd-env-generator 2->17         started        19 systemd snapd-env-generator 2->19         started        signatures3 102 Performs DNS TXT record lookups 80->102 process4 signatures5 21 sh sh 12->21         started        24 sh wget 12->24         started        26 sh rm 12->26         started        114 Found strings related to Crypto-Mining 14->114 28 kworkerd-writeback.elf 14->28         started        process6 file7 76 /dev/shm/.exectest.5475, POSIX 21->76 dropped 30 sh .d 21->30         started        32 sh wget 21->32         started        36 sh 21->36         started        40 28 other processes 21->40 78 /tmp/..redis-sentinel, POSIX 24->78 dropped 38 kworkerd-writeback.elf 28->38         started        process8 file9 42 .d 30->42         started        70 /dev/shm/.d, ELF 32->70 dropped 84 Drops invisible ELF files 32->84 44 sh grep 36->44         started        47 kworkerd-writeback.elf sh 38->47         started        49 kworkerd-writeback.elf sh 38->49         started        86 Searches for CPU information (likely indicative of DDoS capability) 40->86 88 Sample deletes itself 40->88 90 Executes the "nc" (netcat) command used to establish arbitrary TCP or UDP connections and listens 40->90 signatures10 process11 signatures12 51 .d 42->51         started        112 Searches for CPU information (likely indicative of DDoS capability) 44->112 55 sh systemctl 47->55         started        57 sh systemctl 49->57         started        process13 file14 74 /var/spool/cron/crontabs/root, ASCII 51->74 dropped 104 Opens /sys/class/net/* files useful for querying network interface information 51->104 106 Sample deletes itself 51->106 108 Sample tries to persist itself using cron 51->108 59 .d sh 51->59         started        62 .d sh 51->62         started        signatures15 process16 signatures17 110 Executes itself again with its parent PID as an argument (indicative of hampering debugging) 59->110 64 sh crontab 59->64         started        68 sh crontab 62->68         started        process18 file19 72 /var/spool/cron/crontabs/tmp.cGBkZj, ASCII 64->72 dropped 92 Sample tries to persist itself using cron 64->92 94 Executes the "crontab" command typically for achieving persistence 64->94 signatures20
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/5e78e6c39fb638de7536bbf6ceb21ebb6ae852f190447edb751c3a422544e780
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5e78e6c39fb638de7536bbf6ceb21ebb6ae852f190447edb751c3a422544e780/
Threat name:
Linux.Trojan.Multiverze
Create hunting rule
Status:
Malicious
First seen:
2026-06-25 18:59:46 UTC
File Type:
ELF32 Big (SO)
AV detection:
11 of 24 (45.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=lz4onq47wy4n45jwxp3m5mq6xnvoquxrsbch5w3vdq5eejke46aa._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/5e78e6c39fb638de7536bbf6ceb21ebb6ae852f190447edb751c3a422544e780

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:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
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 bb885bf6e5cf58dfa576c8bdd006f80c779ae33a446fc152652eac71ed8db27d

CoinMiner

elf 5e78e6c39fb638de7536bbf6ceb21ebb6ae852f190447edb751c3a422544e780

(this sample)

  
Dropped by
SHA256 bb885bf6e5cf58dfa576c8bdd006f80c779ae33a446fc152652eac71ed8db27d
  
URLhaus
https://urlhaus.abuse.ch/url/3868024/
  
Delivery method
Distributed via web download
  
Dropped by
MD5 2fe76ffad31bc6945809f5a734b86da9

Comments