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Linux Analysis Report
EwFT3M4fD1.elf

Overview

General Information

Sample name:	EwFT3M4fD1.elf renamed because original name is a hash value
Original sample name:	a7c948a107a9d73c3b65c630bdf6fd51.elf
Analysis ID:	1432069
MD5:	a7c948a107a9d73c3b65c630bdf6fd51
SHA1:	d966dfd3099d11976f796d82bc2ca6d3208dcb9f
SHA256:	76496f9bf9b3bdf9c82b3a384b2e0a50c2eb8f146cbcc79fb134a77e11bb594e
Tags:	32elfintelmirai
Infos:

Detection

Okiru

Score:	68
Range:	0 - 100
Whitelisted:	false

Signatures

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Yara detected Okiru

Machine Learning detection for sample

Reads CPU information from /proc indicative of miner or evasive malware

Reads system information from the proc file system

Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable

Sample contains strings that are user agent strings indicative of HTTP manipulation

Sample has stripped symbol table

Sample tries to kill a process (SIGKILL)

Yara signature match

Classification

General Information

Joe Sandbox version:	40.0.0 Tourmaline
Analysis ID:	1432069
Start date and time:	2024-04-26 11:20:10 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 44s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	defaultlinuxfilecookbook.jbs
Analysis system description:	Ubuntu Linux 20.04 x64 (Kernel 5.4.0-72, Firefox 91.0, Evince Document Viewer 3.36.10, LibreOffice 6.4.7.2, OpenJDK 11.0.11)
Analysis Mode:	default
Sample name:	EwFT3M4fD1.elf renamed because original name is a hash value
Original Sample Name:	a7c948a107a9d73c3b65c630bdf6fd51.elf
Detection:	MAL
Classification:	mal68.troj.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/EwFT3M4fD1.elf
PID:	5528
Exit Code:	0
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

EwFT3M4fD1.elf (PID: 5528, Parent: 5449, MD5: a7c948a107a9d73c3b65c630bdf6fd51) Arguments: /tmp/EwFT3M4fD1.elf

EwFT3M4fD1.elf New Fork (PID: 5529, Parent: 5528)

EwFT3M4fD1.elf New Fork (PID: 5530, Parent: 5528)

EwFT3M4fD1.elf New Fork (PID: 5531, Parent: 5530)

cleanup

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
EwFT3M4fD1.elf	JoeSecurity_Okiru	Yara detected Okiru	Joe Security
EwFT3M4fD1.elf	Linux_Trojan_Mirai_aa39fb02	unknown	unknown	0x48e0:$a: 74 DE 8D 40 F1 3C 01 76 D7 80 FA 38 74 D2 80 FA 0A 74 CD 80
EwFT3M4fD1.elf	Linux_Trojan_Mirai_3a56423b	unknown	unknown	0x84af:$a: 24 1C 8B 44 24 20 0F B6 D0 C1 E8 08 89 54 24 24 89 44 24 20 BA 01 00
EwFT3M4fD1.elf	Linux_Trojan_Mirai_d18b3463	unknown	unknown	0x4928:$a: DF 77 95 8D 42 FA 3C 01 76 8E 80 FA 0B 74 89 80 FA 15 74 84 80
EwFT3M4fD1.elf	Linux_Trojan_Mirai_dab39a25	unknown	unknown	0x6be2:$a: 0E 75 20 50 6A 00 6A 00 6A 00 53 6A 0E FF 74 24 48 68 DD 00

Memory Dumps

Source	Rule	Description	Author	Strings
5531.1.0000000008048000.0000000008059000.r-x.sdmp	JoeSecurity_Okiru	Yara detected Okiru	Joe Security
5531.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_aa39fb02	unknown	unknown	0x48e0:$a: 74 DE 8D 40 F1 3C 01 76 D7 80 FA 38 74 D2 80 FA 0A 74 CD 80
5531.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_3a56423b	unknown	unknown	0x84af:$a: 24 1C 8B 44 24 20 0F B6 D0 C1 E8 08 89 54 24 24 89 44 24 20 BA 01 00
5531.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_d18b3463	unknown	unknown	0x4928:$a: DF 77 95 8D 42 FA 3C 01 76 8E 80 FA 0B 74 89 80 FA 15 74 84 80
5531.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_dab39a25	unknown	unknown	0x6be2:$a: 0E 75 20 50 6A 00 6A 00 6A 00 53 6A 0E FF 74 24 48 68 DD 00
5528.1.0000000008048000.0000000008059000.r-x.sdmp	JoeSecurity_Okiru	Yara detected Okiru	Joe Security
5528.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_aa39fb02	unknown	unknown	0x48e0:$a: 74 DE 8D 40 F1 3C 01 76 D7 80 FA 38 74 D2 80 FA 0A 74 CD 80
5528.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_3a56423b	unknown	unknown	0x84af:$a: 24 1C 8B 44 24 20 0F B6 D0 C1 E8 08 89 54 24 24 89 44 24 20 BA 01 00
5528.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_d18b3463	unknown	unknown	0x4928:$a: DF 77 95 8D 42 FA 3C 01 76 8E 80 FA 0B 74 89 80 FA 15 74 84 80
5528.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_dab39a25	unknown	unknown	0x6be2:$a: 0E 75 20 50 6A 00 6A 00 6A 00 53 6A 0E FF 74 24 48 68 DD 00
5530.1.0000000008048000.0000000008059000.r-x.sdmp	JoeSecurity_Okiru	Yara detected Okiru	Joe Security
5530.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_aa39fb02	unknown	unknown	0x48e0:$a: 74 DE 8D 40 F1 3C 01 76 D7 80 FA 38 74 D2 80 FA 0A 74 CD 80
5530.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_3a56423b	unknown	unknown	0x84af:$a: 24 1C 8B 44 24 20 0F B6 D0 C1 E8 08 89 54 24 24 89 44 24 20 BA 01 00
5530.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_d18b3463	unknown	unknown	0x4928:$a: DF 77 95 8D 42 FA 3C 01 76 8E 80 FA 0B 74 89 80 FA 15 74 84 80
5530.1.0000000008048000.0000000008059000.r-x.sdmp	Linux_Trojan_Mirai_dab39a25	unknown	unknown	0x6be2:$a: 0E 75 20 50 6A 00 6A 00 6A 00 53 6A 0E FF 74 24 48 68 DD 00
Process Memory Space: EwFT3M4fD1.elf PID: 5528	JoeSecurity_Okiru	Yara detected Okiru	Joe Security
Process Memory Space: EwFT3M4fD1.elf PID: 5530	JoeSecurity_Okiru	Yara detected Okiru	Joe Security
Process Memory Space: EwFT3M4fD1.elf PID: 5531	JoeSecurity_Okiru	Yara detected Okiru	Joe Security
Click to see the 13 entries

Snort Signatures

⊘No Snort rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: EwFT3M4fD1.elf	ReversingLabs: Detection: 28%
Source: EwFT3M4fD1.elf	Virustotal: Detection: 21%			Perma Link

Machine Learning detection for sample

Source: EwFT3M4fD1.elf

Joe Sandbox ML: detected

Source: /tmp/EwFT3M4fD1.elf (PID: 5531)

Reads CPU info from proc file: /proc/cpuinfo

Jump to behavior

Source: global traffic

DNS traffic detected: DNS query: daisy.ubuntu.com

System Summary

Malicious sample detected (through community Yara rule)

Source: EwFT3M4fD1.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_aa39fb02 Author: unknown
Source: EwFT3M4fD1.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_3a56423b Author: unknown
Source: EwFT3M4fD1.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_d18b3463 Author: unknown
Source: EwFT3M4fD1.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_dab39a25 Author: unknown
Source: 5531.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_aa39fb02 Author: unknown
Source: 5531.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_3a56423b Author: unknown
Source: 5531.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_d18b3463 Author: unknown
Source: 5531.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_dab39a25 Author: unknown
Source: 5528.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_aa39fb02 Author: unknown
Source: 5528.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_3a56423b Author: unknown
Source: 5528.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_d18b3463 Author: unknown
Source: 5528.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_dab39a25 Author: unknown
Source: 5530.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_aa39fb02 Author: unknown
Source: 5530.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_3a56423b Author: unknown
Source: 5530.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_d18b3463 Author: unknown
Source: 5530.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_dab39a25 Author: unknown

Source: Initial sample	String containing 'busybox' found: /bin/busybox
Source: Initial sample	String containing 'busybox' found: /proc/proc/%s/exe/var/Challenge/app/hi3511/gmDVR/ibox/usr/dvr_main _8182T_1108/mnt/mtd/app/gui/var/Kylin/l0 c/udevd/var/tmp/sonia/hicore/stm_hi3511_dvr/bin/busybox/usr/lib/systemd/systemd/shell/mnt//sys//boot//media//srv//var/run//sbin//lib//etc//dev//home/Davinci/telnet/ssh/var/spool/var/Sofia/sshd/usr/compress/bin//compress/bin/compress/usr//bash/httpd/telnetd/dropbear/ropbear/encoder/system/root/dvr_gui//root/dvr_app//anko-app//opt//softbot.arm/softbot.arm6/softbot.dbg/softbot.mpsl/softbot.x86/softbot.arm5/softbot.arm7/softbot.mips/softbot.sh4/bin/sh/anko-app/ankosample _8182T_1104/usr/libexec/openssh/sftp-server

Source: ELF static info symbol of initial sample

.symtab present: no

Source: /tmp/EwFT3M4fD1.elf (PID: 5529)

SIGKILL sent: pid: 5531, result: successful

Jump to behavior

Source: EwFT3M4fD1.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_aa39fb02 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = b136ba6496816ba9737a3eb0e633c28a337511a97505f06e52f37b38599587cb, id = aa39fb02-ca7e-4809-ab5d-00e92763f7ec, last_modified = 2021-09-16
Source: EwFT3M4fD1.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_3a56423b os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 117d6eb47f000c9d475119ca0e6a1b49a91bbbece858758aaa3d7f30d0777d75, id = 3a56423b-c0cf-4483-87e3-552beb40563a, last_modified = 2021-09-16
Source: EwFT3M4fD1.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_d18b3463 reference_sample = cd86534d709877ec737ceb016b2a5889d2e3562ffa45a278bc615838c2e9ebc3, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 4b3d3bb65db2cdb768d91c50928081780f206208e952c74f191d8bc481ce19c6, id = d18b3463-1b5e-49e1-9ae8-1d63a10a1ccc, last_modified = 2021-09-16
Source: EwFT3M4fD1.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_dab39a25 reference_sample = 3e02fb63803110cabde08e809cf4acc1b8fb474ace531959a311858fdd578bab, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 5a628d9af9d6dccf29e78f780bb74a2fa25167954c34d4a1529bdea5ea891ac0, id = dab39a25-852b-441f-86ab-23d945daa62c, last_modified = 2022-01-26
Source: 5531.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_aa39fb02 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = b136ba6496816ba9737a3eb0e633c28a337511a97505f06e52f37b38599587cb, id = aa39fb02-ca7e-4809-ab5d-00e92763f7ec, last_modified = 2021-09-16
Source: 5531.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_3a56423b os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 117d6eb47f000c9d475119ca0e6a1b49a91bbbece858758aaa3d7f30d0777d75, id = 3a56423b-c0cf-4483-87e3-552beb40563a, last_modified = 2021-09-16
Source: 5531.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_d18b3463 reference_sample = cd86534d709877ec737ceb016b2a5889d2e3562ffa45a278bc615838c2e9ebc3, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 4b3d3bb65db2cdb768d91c50928081780f206208e952c74f191d8bc481ce19c6, id = d18b3463-1b5e-49e1-9ae8-1d63a10a1ccc, last_modified = 2021-09-16
Source: 5531.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_dab39a25 reference_sample = 3e02fb63803110cabde08e809cf4acc1b8fb474ace531959a311858fdd578bab, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 5a628d9af9d6dccf29e78f780bb74a2fa25167954c34d4a1529bdea5ea891ac0, id = dab39a25-852b-441f-86ab-23d945daa62c, last_modified = 2022-01-26
Source: 5528.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_aa39fb02 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = b136ba6496816ba9737a3eb0e633c28a337511a97505f06e52f37b38599587cb, id = aa39fb02-ca7e-4809-ab5d-00e92763f7ec, last_modified = 2021-09-16
Source: 5528.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_3a56423b os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 117d6eb47f000c9d475119ca0e6a1b49a91bbbece858758aaa3d7f30d0777d75, id = 3a56423b-c0cf-4483-87e3-552beb40563a, last_modified = 2021-09-16
Source: 5528.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_d18b3463 reference_sample = cd86534d709877ec737ceb016b2a5889d2e3562ffa45a278bc615838c2e9ebc3, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 4b3d3bb65db2cdb768d91c50928081780f206208e952c74f191d8bc481ce19c6, id = d18b3463-1b5e-49e1-9ae8-1d63a10a1ccc, last_modified = 2021-09-16
Source: 5528.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_dab39a25 reference_sample = 3e02fb63803110cabde08e809cf4acc1b8fb474ace531959a311858fdd578bab, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 5a628d9af9d6dccf29e78f780bb74a2fa25167954c34d4a1529bdea5ea891ac0, id = dab39a25-852b-441f-86ab-23d945daa62c, last_modified = 2022-01-26
Source: 5530.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_aa39fb02 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = b136ba6496816ba9737a3eb0e633c28a337511a97505f06e52f37b38599587cb, id = aa39fb02-ca7e-4809-ab5d-00e92763f7ec, last_modified = 2021-09-16
Source: 5530.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_3a56423b os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 117d6eb47f000c9d475119ca0e6a1b49a91bbbece858758aaa3d7f30d0777d75, id = 3a56423b-c0cf-4483-87e3-552beb40563a, last_modified = 2021-09-16
Source: 5530.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_d18b3463 reference_sample = cd86534d709877ec737ceb016b2a5889d2e3562ffa45a278bc615838c2e9ebc3, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 4b3d3bb65db2cdb768d91c50928081780f206208e952c74f191d8bc481ce19c6, id = d18b3463-1b5e-49e1-9ae8-1d63a10a1ccc, last_modified = 2021-09-16
Source: 5530.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_dab39a25 reference_sample = 3e02fb63803110cabde08e809cf4acc1b8fb474ace531959a311858fdd578bab, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 5a628d9af9d6dccf29e78f780bb74a2fa25167954c34d4a1529bdea5ea891ac0, id = dab39a25-852b-441f-86ab-23d945daa62c, last_modified = 2022-01-26

Source: classification engine

Classification label: mal68.troj.linELF@0/0@2/0

Source: /tmp/EwFT3M4fD1.elf (PID: 5531)

Reads from proc file: /proc/cpuinfo

Jump to behavior

Source: /tmp/EwFT3M4fD1.elf (PID: 5531)

Reads CPU info from proc file: /proc/cpuinfo

Jump to behavior

Stealing of Sensitive Information

Yara detected Okiru

Source: Yara match	File source: EwFT3M4fD1.elf, type: SAMPLE
Source: Yara match	File source: 5531.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5528.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5530.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: EwFT3M4fD1.elf PID: 5528, type: MEMORYSTR
Source: Yara match	File source: Process Memory Space: EwFT3M4fD1.elf PID: 5530, type: MEMORYSTR
Source: Yara match	File source: Process Memory Space: EwFT3M4fD1.elf PID: 5531, type: MEMORYSTR

Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:100.0) Gecko/20100101 Firefox/100.0
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.64 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (X11; Linux x86_64; rv:100.0) Gecko/20100101 Firefox/100.0
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Firefox/91.0
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.63 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:101.0) Gecko/20100101 Firefox/101.0
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:100.0) Gecko/20100101 Firefox/100.0Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.64 Safari/537.36Mozilla/5.0 (X11; Linux x86_64; rv:100.0) Gecko/20100101 Firefox/100.0Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Firefox/91.0Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.63 Safari/537.36Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:101.0) Gecko/20100101 Firefox/101.0

Remote Access Functionality

Yara detected Okiru

Source: Yara match	File source: EwFT3M4fD1.elf, type: SAMPLE
Source: Yara match	File source: 5531.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5528.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5530.1.0000000008048000.0000000008059000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: EwFT3M4fD1.elf PID: 5528, type: MEMORYSTR
Source: Yara match	File source: Process Memory Space: EwFT3M4fD1.elf PID: 5530, type: MEMORYSTR
Source: Yara match	File source: Process Memory Space: EwFT3M4fD1.elf PID: 5531, type: MEMORYSTR

Mitre Att&ck Matrix

Reconnaissance	Resource Development	Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Command and Control	Exfiltration	Impact
Gather Victim Identity Information	Acquire Infrastructure	Valid Accounts	Windows Management Instrumentation	Path Interception	Path Interception	Direct Volume Access	OS Credential Dumping	2 System Information Discovery	Remote Services	Data from Local System	1 Data Obfuscation	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	Boot or Logon Initialization Scripts	Rootkit	LSASS Memory	Application Window Discovery	Remote Desktop Protocol	Data from Removable Media	1 Non-Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	Logon Script (Windows)	Obfuscated Files or Information	Security Account Manager	Query Registry	SMB/Windows Admin Shares	Data from Network Shared Drive	1 Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact

Malware Configuration

⊘No configs have been found

Behavior Graph

Hide Legend

Legend:

Process
Signature
Created File
DNS/IP Info
Is Dropped
Number of created Files
Is malicious
Internet

Screenshots

Thumbnails

This section contains all screenshots as thumbnails, including those not shown in the slideshow.

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
EwFT3M4fD1.elf	29%	ReversingLabs	Linux.Trojan.Mirai
EwFT3M4fD1.elf	22%	Virustotal		Browse
EwFT3M4fD1.elf	100%	Joe Sandbox ML

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

Name	IP	Active	Malicious	Antivirus Detection	Reputation
daisy.ubuntu.com	162.213.35.25	true	false		high

World Map of Contacted IPs

⊘No contacted IP infos

Joe Sandbox View / Context

IPs

⊘No context

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	kWVY0Rqmlx.elf	Get hash	malicious	Okiru	Browse	162.213.35.24
	RJ93lr3oq2.elf	Get hash	malicious	Okiru	Browse	162.213.35.25
	0tfJECfbEP.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	wve8oHXj1h.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.24
	o4883TEQGB.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.25
	Y4pblBbDQc.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	WIen6fj9bO.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.24
	LmwJkVcLpC.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.24
	6fV4tfoJp2.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	hz2ffABF7w.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.25

ASNs

⊘No context

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Static File Info

General

File type:	ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, stripped
Entropy (8bit):	6.383401534991636
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 50.16% ELF Executable and Linkable format (generic) (4004/1) 49.84%
File name:	EwFT3M4fD1.elf
File size:	72'416 bytes
MD5:	a7c948a107a9d73c3b65c630bdf6fd51
SHA1:	d966dfd3099d11976f796d82bc2ca6d3208dcb9f
SHA256:	76496f9bf9b3bdf9c82b3a384b2e0a50c2eb8f146cbcc79fb134a77e11bb594e
SHA512:	aa71c1fff863f390def754a4e90f64660e3c8601dc01f23b62bb93a183bd00a331e62f0bc41954c7cf771ebd75d28b7d5eff34cd477d0fee2a736d8b8939a258
SSDEEP:	1536:9TjjCHF0aEh5wzhJItJxOKihGLjBJNkU231gGEwCBp3r:NjuWh5wzQxlicSKGAP
TLSH:	BC63F949F753E0F1EC074970019BFABF8A30AE678520DD5DEB80FED59D32A926049726
File Content Preview:	.ELF....................X...4...(.......4. ...(.........................................t...t...t...T...T...........Q.td................................d.......................U......=.....t..1...................u........t...$.............................

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	Intel 80386
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x8048158
Flags:	0x0
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	71976
Section Header Size:	40
Number of Section Headers:	11
Header String Table Index:	10

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x8048094	0x94	0x11	0x0	0x6	AX	1
.text	PROGBITS	0x80480b0	0xb0	0xf52c	0x0	0x6	AX	16
.fini	PROGBITS	0x80575dc	0xf5dc	0xc	0x0	0x6	AX	1
.rodata	PROGBITS	0x8057600	0xf600	0x15ac	0x0	0x2	A	32
.ctors	PROGBITS	0x8059074	0x11074	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x805907c	0x1107c	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x8059098	0x11098	0x30	0x0	0x3	WA	8
.bss	NOBITS	0x80590e0	0x110c8	0x6e8	0x0	0x3	WA	32
.comment	PROGBITS	0x0	0x110c8	0x816	0x0	0x0		1
.shstrtab	STRTAB	0x0	0x118de	0x47	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x8048000	0x8048000	0x10bac	0x10bac	6.4338	0x5	R E	0x1000	.init .text .fini .rodata
LOAD	0x11074	0x8059074	0x8059074	0x54	0x754	1.5455	0x6	RW	0x1000	.ctors .dtors .data .bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x6	RW	0x4

Network Behavior

Network Port Distribution

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 26, 2024 11:23:33.567398071 CEST	35402	53	192.168.2.15	8.8.8.8
Apr 26, 2024 11:23:33.567478895 CEST	45001	53	192.168.2.15	8.8.8.8
Apr 26, 2024 11:23:33.724641085 CEST	53	35402	8.8.8.8	192.168.2.15
Apr 26, 2024 11:23:33.724668026 CEST	53	45001	8.8.8.8	192.168.2.15

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Apr 26, 2024 11:23:33.567398071 CEST	192.168.2.15	8.8.8.8	0xfb83	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Apr 26, 2024 11:23:33.567478895 CEST	192.168.2.15	8.8.8.8	0x2233	Standard query (0)	daisy.ubuntu.com	28	IN (0x0001)	false

DNS Answers

Timestamp	Source IP	Dest IP	Trans ID	Reply Code	Name	CName	Address	Type	Class	DNS over HTTPS
Apr 26, 2024 11:23:33.724641085 CEST	8.8.8.8	192.168.2.15	0xfb83	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Apr 26, 2024 11:23:33.724641085 CEST	8.8.8.8	192.168.2.15	0xfb83	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: EwFT3M4fD1.elf PID: 5528, Parent PID: 5449

General

Start time (UTC):	09:20:46
Start date (UTC):	26/04/2024
Path:	/tmp/EwFT3M4fD1.elf
Arguments:	/tmp/EwFT3M4fD1.elf
File size:	72416 bytes
MD5 hash:	a7c948a107a9d73c3b65c630bdf6fd51

Chronological Activities

Analysis Process: EwFT3M4fD1.elf PID: 5529, Parent PID: 5528

General

Start time (UTC):	09:20:46
Start date (UTC):	26/04/2024
Path:	/tmp/EwFT3M4fD1.elf
Arguments:	-
File size:	72416 bytes
MD5 hash:	a7c948a107a9d73c3b65c630bdf6fd51

Chronological Activities

Analysis Process: EwFT3M4fD1.elf PID: 5530, Parent PID: 5528

General

Start time (UTC):	09:20:46
Start date (UTC):	26/04/2024
Path:	/tmp/EwFT3M4fD1.elf
Arguments:	-
File size:	72416 bytes
MD5 hash:	a7c948a107a9d73c3b65c630bdf6fd51

Chronological Activities

Analysis Process: EwFT3M4fD1.elf PID: 5531, Parent PID: 5530

General

Start time (UTC):	09:20:46
Start date (UTC):	26/04/2024
Path:	/tmp/EwFT3M4fD1.elf
Arguments:	-
File size:	72416 bytes
MD5 hash:	a7c948a107a9d73c3b65c630bdf6fd51

Description:	An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture. Adversaries may use the information from System Information Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Process: OS API Execution, Process: Process Creation
Platforms:	IaaS, Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may obfuscate command and control traffic to make it more difficult to detect. Command and control (C2) communications are hidden (but not necessarily encrypted) in an attempt to make the content more difficult to discover or decipher and to make the communication less conspicuous and hide commands from being seen. This encompasses many methods, such as adding junk data to protocol traffic, using steganography, or impersonating legitimate protocols.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may use an OSI non-application layer protocol for communication between host and C2 server or among infected hosts within a network. The list of possible protocols is extensive.Specific examples include use of network layer protocols, such as the Internet Control Message Protocol (ICMP), transport layer protocols, such as the User Datagram Protocol (UDP), session layer protocols, such as Socket Secure (SOCKS), as well as redirected/tunneled protocols, such as Serial over LAN (SOL).
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may communicate using OSI application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Linux Analysis Report EwFT3M4fD1.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Initial Sample

Memory Dumps

Snort Signatures

Joe Sandbox Signatures

AV Detection

Bitcoin Miner

Networking

System Summary

Persistence and Installation Behavior

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

Mitre Att&ck Matrix

Malware Configuration

Behavior Graph

Screenshots

Thumbnails

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Domains

URLs

Domains and IPs

Contacted Domains

World Map of Contacted IPs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

Static ELF Info

ELF header

Sections

Program Segments

Network Behavior

Network Port Distribution

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: EwFT3M4fD1.elf PID: 5528, Parent PID: 5449

General

Chronological Activities

Analysis Process: EwFT3M4fD1.elf PID: 5529, Parent PID: 5528

General

Chronological Activities

Analysis Process: EwFT3M4fD1.elf PID: 5530, Parent PID: 5528

General

Chronological Activities

Analysis Process: EwFT3M4fD1.elf PID: 5531, Parent PID: 5530

General

Chronological Activities

Linux Analysis Report
EwFT3M4fD1.elf