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Linux Analysis Report
kre4per.x86.elf

Overview

General Information

Sample name:	kre4per.x86.elf
Analysis ID:	1616935
MD5:	7ffbdf8a1d617b2c93d5fc520ccb31cc
SHA1:	5dbe3ceeb1e58a61671b74d040b809d343d24b53
SHA256:	7c3b7d80a9f95b61e3a56a62493c5f3336eabd766a17d2d07e28d01ec750f7eb
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	64
Range:	0 - 100

Signatures

Antivirus / Scanner detection for submitted sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Sample has stripped symbol table

Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)

Yara signature match

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1616935
Start date and time:	2025-02-17 11:10:12 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 22s
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:	kre4per.x86.elf
Detection:	MAL
Classification:	mal64.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/kre4per.x86.elf
PID:	5429
Exit Code:	136
Exit Code Info:	SIGFPE (8) Floating-point exception
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

kre4per.x86.elf (PID: 5429, Parent: 5354, MD5: 7ffbdf8a1d617b2c93d5fc520ccb31cc) Arguments: /tmp/kre4per.x86.elf

cleanup

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
kre4per.x86.elf	Linux_Trojan_Mirai_b14f4c5d	unknown	unknown	0x5590:$a: 53 31 DB 8B 4C 24 0C 8B 54 24 08 83 F9 01 76 15 66 8B 02 83 E9 02 25 FF FF 00 00 83 C2 02 01 C3 83 F9 01 77 EB 49 75 05 0F BE 02 01 C3
kre4per.x86.elf	Linux_Trojan_Mirai_88de437f	unknown	unknown	0x98e2:$a: 24 08 8B 4C 24 04 85 D2 74 0D 31 C0 89 F6 C6 04 08 00 40 39 D0
kre4per.x86.elf	Linux_Trojan_Mirai_ae9d0fa6	unknown	unknown	0x192:$a: 83 EC 04 8A 44 24 18 8B 5C 24 14 88 44 24 03 8A 44 24 10 25 FF 00
kre4per.x86.elf	Linux_Trojan_Mirai_389ee3e9	unknown	unknown	0xb72b:$a: 89 45 00 EB 2C 8B 4B 04 8B 13 8B 7B 18 8B 01 01 02 8B 02 83
kre4per.x86.elf	Linux_Trojan_Mirai_cc93863b	unknown	unknown	0xa27d:$a: C3 57 8B 44 24 0C 8B 4C 24 10 8B 7C 24 08 F3 AA 8B 44 24 08
kre4per.x86.elf	Linux_Trojan_Mirai_8aa7b5d3	unknown	unknown	0x98b2:$a: 8B 4C 24 14 8B 74 24 0C 8B 5C 24 10 85 C9 74 0D 31 D2 8A 04 1A 88
Click to see the 1 entries

Memory Dumps

Source	Rule	Description	Author	Strings
5429.1.0000000008048000.0000000008056000.r-x.sdmp	Linux_Trojan_Mirai_b14f4c5d	unknown	unknown	0x5590:$a: 53 31 DB 8B 4C 24 0C 8B 54 24 08 83 F9 01 76 15 66 8B 02 83 E9 02 25 FF FF 00 00 83 C2 02 01 C3 83 F9 01 77 EB 49 75 05 0F BE 02 01 C3
5429.1.0000000008048000.0000000008056000.r-x.sdmp	Linux_Trojan_Mirai_88de437f	unknown	unknown	0x98e2:$a: 24 08 8B 4C 24 04 85 D2 74 0D 31 C0 89 F6 C6 04 08 00 40 39 D0
5429.1.0000000008048000.0000000008056000.r-x.sdmp	Linux_Trojan_Mirai_ae9d0fa6	unknown	unknown	0x192:$a: 83 EC 04 8A 44 24 18 8B 5C 24 14 88 44 24 03 8A 44 24 10 25 FF 00
5429.1.0000000008048000.0000000008056000.r-x.sdmp	Linux_Trojan_Mirai_389ee3e9	unknown	unknown	0xb72b:$a: 89 45 00 EB 2C 8B 4B 04 8B 13 8B 7B 18 8B 01 01 02 8B 02 83
5429.1.0000000008048000.0000000008056000.r-x.sdmp	Linux_Trojan_Mirai_cc93863b	unknown	unknown	0xa27d:$a: C3 57 8B 44 24 0C 8B 4C 24 10 8B 7C 24 08 F3 AA 8B 44 24 08
5429.1.0000000008048000.0000000008056000.r-x.sdmp	Linux_Trojan_Mirai_8aa7b5d3	unknown	unknown	0x98b2:$a: 8B 4C 24 14 8B 74 24 0C 8B 5C 24 10 85 C9 74 0D 31 D2 8A 04 1A 88
Click to see the 1 entries

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• AV Detection
• Networking
• System Summary

Click to jump to signature section

Show All Signature Results

AV Detection

Antivirus / Scanner detection for submitted sample

Source: kre4per.x86.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: kre4per.x86.elf	Virustotal: Detection: 62%			Perma Link
Source: kre4per.x86.elf	ReversingLabs: Detection: 70%

Source: global traffic

TCP traffic: 192.168.2.13:48202 -> 185.125.190.26:443

Source: unknown	TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknown	TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1

Source: global traffic

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

Source: unknown

Network traffic detected: HTTP traffic on port 48202 -> 443

System Summary

Malicious sample detected (through community Yara rule)

Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_b14f4c5d Author: unknown
Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_88de437f Author: unknown
Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_ae9d0fa6 Author: unknown
Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_389ee3e9 Author: unknown
Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_cc93863b Author: unknown
Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_8aa7b5d3 Author: unknown
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_b14f4c5d Author: unknown
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_88de437f Author: unknown
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_ae9d0fa6 Author: unknown
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_389ee3e9 Author: unknown
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_cc93863b Author: unknown
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_8aa7b5d3 Author: unknown

Source: ELF static info symbol of initial sample

.symtab present: no

Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_b14f4c5d os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = a70d052918dd2fbc66db241da6438015130f0fb6929229bfe573546fe98da817, id = b14f4c5d-054f-46e6-9fa8-3588f1ef68b7, last_modified = 2021-09-16
Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_88de437f reference_sample = 8dc745a6de6f319cd6021c3e147597315cc1be02099d78fc8aae94de0e1e4bc6, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = c19eb595c2b444a809bef8500c20342c9f46694d3018e268833f9b884133a1ea, id = 88de437f-9c98-4e1d-96c0-7b433c99886a, last_modified = 2021-09-16
Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_ae9d0fa6 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = ca2bf2771844bec95563800d19a35dd230413f8eff0bd44c8ab0b4c596f81bfc, id = ae9d0fa6-be06-4656-9b13-8edfc0ee9e71, last_modified = 2021-09-16
Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_389ee3e9 reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 59f2359dc1f41d385d639d157b4cd9fc73d76d8abb7cc09d47632bb4c9a39e6e, id = 389ee3e9-70c1-4c93-a999-292cf6ff1652, last_modified = 2022-01-26
Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_cc93863b reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = f3ecd30f0b511a8e92cfa642409d559e7612c3f57a1659ca46c77aca809a00ac, id = cc93863b-1050-40ba-9d02-5ec9ce6a3a28, last_modified = 2022-01-26
Source: kre4per.x86.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_8aa7b5d3 reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 02a2c18c362df4b1fceb33f3b605586514ba9a00c7afedf71c04fa54d8146444, id = 8aa7b5d3-e1eb-4b55-b36a-0d3a242c06e9, last_modified = 2022-01-26
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_b14f4c5d os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = a70d052918dd2fbc66db241da6438015130f0fb6929229bfe573546fe98da817, id = b14f4c5d-054f-46e6-9fa8-3588f1ef68b7, last_modified = 2021-09-16
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_88de437f reference_sample = 8dc745a6de6f319cd6021c3e147597315cc1be02099d78fc8aae94de0e1e4bc6, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = c19eb595c2b444a809bef8500c20342c9f46694d3018e268833f9b884133a1ea, id = 88de437f-9c98-4e1d-96c0-7b433c99886a, last_modified = 2021-09-16
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_ae9d0fa6 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = ca2bf2771844bec95563800d19a35dd230413f8eff0bd44c8ab0b4c596f81bfc, id = ae9d0fa6-be06-4656-9b13-8edfc0ee9e71, last_modified = 2021-09-16
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_389ee3e9 reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 59f2359dc1f41d385d639d157b4cd9fc73d76d8abb7cc09d47632bb4c9a39e6e, id = 389ee3e9-70c1-4c93-a999-292cf6ff1652, last_modified = 2022-01-26
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_cc93863b reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = f3ecd30f0b511a8e92cfa642409d559e7612c3f57a1659ca46c77aca809a00ac, id = cc93863b-1050-40ba-9d02-5ec9ce6a3a28, last_modified = 2022-01-26
Source: 5429.1.0000000008048000.0000000008056000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Mirai_8aa7b5d3 reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 02a2c18c362df4b1fceb33f3b605586514ba9a00c7afedf71c04fa54d8146444, id = 8aa7b5d3-e1eb-4b55-b36a-0d3a242c06e9, last_modified = 2022-01-26

Source: classification engine

Classification label: mal64.linELF@0/0@2/0

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	System Service Discovery	Remote Services	Data from Local System	1 Encrypted Channel	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	2 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

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
kre4per.x86.elf	63%	Virustotal		Browse
kre4per.x86.elf	70%	ReversingLabs	Linux.Trojan.Mirai
kre4per.x86.elf	100%	Avira	EXP/ELF.Mirai.Bootnet.o

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Download Network PCAP: filtered – full

Contacted Domains

Name	IP	Active	Malicious	Antivirus Detection	Reputation
daisy.ubuntu.com	162.213.35.24	true	false		high

World Map of Contacted IPs

No. of IPs < 25%
25% < No. of IPs < 50%
50% < No. of IPs < 75%
75% < No. of IPs

Public IPs

IP	Domain	Country	Flag	ASN	ASN Name	Malicious
185.125.190.26	unknown	United Kingdom		41231	CANONICAL-ASGB	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link
185.125.190.26	kre4per.arm7.elf	Get hash	malicious	Mirai	Browse
	sh4.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	a-r.m-4.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	m-6.8-k.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	main_x86.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	linux_mipsel_softfloat.elf	Get hash	malicious	Chaos	Browse
	linux_ppc64.elf	Get hash	malicious	Chaos	Browse
	EdiAf.arm7.elf	Get hash	malicious	Unknown	Browse

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	kre4per.mips.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	kre4per.ppc.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	kre4per.arm7.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	kre4per.m68k.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	sh4.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	sh4.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	arm.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	armv5l.elf	Get hash	malicious	Unknown	Browse	162.213.35.25

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	kre4per.arm7.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	sh4.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	m68k.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	185.125.190.26
	mpsl.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42

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):	6.441434212046435
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 50.16% ELF Executable and Linkable format (generic) (4004/1) 49.84%
File name:	kre4per.x86.elf
File size:	54'864 bytes
MD5:	7ffbdf8a1d617b2c93d5fc520ccb31cc
SHA1:	5dbe3ceeb1e58a61671b74d040b809d343d24b53
SHA256:	7c3b7d80a9f95b61e3a56a62493c5f3336eabd766a17d2d07e28d01ec750f7eb
SHA512:	3de46ad924e9ceab846f2a09933a1cb654e5e70c8a4bf84d395c8492470b8bcc0afc838b3f4ceb8086c81e4beba5c2884bd59a202d6c682ae58c6d2a28766727
SSDEEP:	1536:O13kynNjv6czSEZeLmI37KNCgoTcpoQzWxS2RAfah5cQ:AUyntv6cuEZ437KAgowpoeiSi1D
TLSH:	AB3317C4E903D9FDDC5619712137EB328772F13B1029EA87E7ACAA22AC46B41D44729D
File Content Preview:	.ELF....................d...4...........4. ...(..................... ... ...............$...$c..$c..\...............Q.td............................U..S............h....S...[]...$.............U......=.d...t..5....dc.....dc......u........t....h S..........

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:	0x8048164
Flags:	0x0
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	54464
Section Header Size:	40
Number of Section Headers:	10
Header String Table Index:	9

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x8048094	0x94	0x1c	0x0	0x6	AX	1
.text	PROGBITS	0x80480b0	0xb0	0xc476	0x0	0x6	AX	16
.fini	PROGBITS	0x8054526	0xc526	0x17	0x0	0x6	AX	1
.rodata	PROGBITS	0x8054540	0xc540	0xde0	0x0	0x2	A	32
.ctors	PROGBITS	0x8056324	0xd324	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x805632c	0xd32c	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x8056360	0xd360	0x120	0x0	0x3	WA	32
.bss	NOBITS	0x8056480	0xd480	0x660	0x0	0x3	WA	32
.shstrtab	STRTAB	0x0	0xd480	0x3e	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	0xd320	0xd320	6.4632	0x5	R E	0x1000	.init .text .fini .rodata
LOAD	0xd324	0x8056324	0x8056324	0x15c	0x7bc	4.3198	0x6	RW	0x1000	.ctors .dtors .data .bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x6	RW	0x4

Network Behavior

Download Network PCAP: filtered – full

Network Port Distribution

Total Packets: 4
• 443 (HTTPS)
• 53 (DNS)

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Feb 17, 2025 11:11:05.505086899 CET	48202	443	192.168.2.13	185.125.190.26
Feb 17, 2025 11:11:36.481093884 CET	48202	443	192.168.2.13	185.125.190.26

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Feb 17, 2025 11:10:58.559803963 CET	39215	53	192.168.2.13	1.1.1.1
Feb 17, 2025 11:10:58.559803963 CET	49818	53	192.168.2.13	1.1.1.1
Feb 17, 2025 11:10:58.767302990 CET	53	39215	1.1.1.1	192.168.2.13
Feb 17, 2025 11:10:58.783212900 CET	53	49818	1.1.1.1	192.168.2.13

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Feb 17, 2025 11:10:58.559803963 CET	192.168.2.13	1.1.1.1	0x3041	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Feb 17, 2025 11:10:58.559803963 CET	192.168.2.13	1.1.1.1	0x7b4d	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
Feb 17, 2025 11:10:58.767302990 CET	1.1.1.1	192.168.2.13	0x3041	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false
Feb 17, 2025 11:10:58.767302990 CET	1.1.1.1	192.168.2.13	0x3041	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: kre4per.x86.elf PID: 5429, Parent PID: 5354

General

Start time (UTC):	10:10:56
Start date (UTC):	17/02/2025
Path:	/tmp/kre4per.x86.elf
Arguments:	/tmp/kre4per.x86.elf
File size:	54864 bytes
MD5 hash:	7ffbdf8a1d617b2c93d5fc520ccb31cc

Description:	Adversaries may employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol. Despite the use of a secure algorithm, these implementations may be vulnerable to reverse engineering if secret keys are encoded and/or generated within malware samples/configuration files.
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

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Linux Analysis Report kre4per.x86.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Initial Sample

Memory Dumps

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Mitre Att&ck Matrix

Malware Configuration

Behavior Graph

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Domains

URLs

Domains and IPs

Contacted Domains

World Map of Contacted IPs

Public 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

TCP Packets

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: kre4per.x86.elf PID: 5429, Parent PID: 5354

General

Linux Analysis Report
kre4per.x86.elf