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Linux Analysis Report
vwkjebwi686.elf

Overview

General Information

Sample name:	vwkjebwi686.elf
Analysis ID:	1562599
MD5:	631f090c1133212882b3d513a6e5a5a3
SHA1:	ad56b21d783f27b4d3df69250e4106b3057547d2
SHA256:	9f994925d0cfc6b62edb53f7d3192a28b616d79d7faf6f5063359c071540b9f9
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	52
Range:	0 - 100
Whitelisted:	false

Signatures

Malicious sample detected (through community Yara rule)

Machine Learning detection for sample

Executes the "rm" command used to delete files or directories

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

Yara signature match

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1562599
Start date and time:	2024-11-25 19:01:05 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 16s
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:	vwkjebwi686.elf
Detection:	MAL
Classification:	mal52.linELF@0/0@0/0

Warnings

VT rate limit hit for: vwkjebwi686.elf

Runtime Messages

Command:	/tmp/vwkjebwi686.elf
PID:	6213
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

dash New Fork (PID: 6201, Parent: 4333)

rm (PID: 6201, Parent: 4333, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.Rb0rnMx73G /tmp/tmp.1q0iCLCJwr /tmp/tmp.ZVC81Ci7Ku

dash New Fork (PID: 6202, Parent: 4333)

rm (PID: 6202, Parent: 4333, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.Rb0rnMx73G /tmp/tmp.1q0iCLCJwr /tmp/tmp.ZVC81Ci7Ku

cleanup

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
vwkjebwi686.elf	Linux_Trojan_Mirai_268aac0b	unknown	unknown	0x7a7f:$a: 24 18 0F B7 44 24 20 8B 54 24 1C 83 F9 01 8B 7E 0C 89 04 24 8B
vwkjebwi686.elf	Linux_Trojan_Mirai_0cb1699c	unknown	unknown	0x7a32:$a: DB 8B 4C 24 0C 8B 54 24 08 83 F9 01 76 10 0F B7 02 83 E9 02 83
vwkjebwi686.elf	Linux_Trojan_Mirai_70ef58f1	unknown	unknown	0xa54d:$a: 89 D0 8B 19 01 D8 0F B6 5C 24 10 30 18 89 D0 8B 19 01 D8 0F B6 5C 0xa5ed:$a: 89 D0 8B 19 01 D8 0F B6 5C 24 10 30 18 89 D0 8B 19 01 D8 0F B6 5C
vwkjebwi686.elf	Linux_Trojan_Mirai_2e3f67a9	unknown	unknown	0x582:$a: 53 83 EC 04 0F B6 74 24 14 8B 5C 24 18 8B 7C 24 20 0F B6 44 0x5e2:$a: 53 83 EC 04 0F B6 74 24 14 8B 5C 24 18 8B 7C 24 20 0F B6 44
vwkjebwi686.elf	Linux_Trojan_Mirai_88de437f	unknown	unknown	0xabe2:$a: 24 08 8B 4C 24 04 85 D2 74 0D 31 C0 89 F6 C6 04 08 00 40 39 D0

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Machine Learning detection for sample

Source: vwkjebwi686.elf

Joe Sandbox ML: detected

Source: global traffic	TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic	TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic	TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80

Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown	TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown	TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42

Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443

System Summary

Malicious sample detected (through community Yara rule)

Source: vwkjebwi686.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_268aac0b Author: unknown
Source: vwkjebwi686.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_0cb1699c Author: unknown
Source: vwkjebwi686.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_70ef58f1 Author: unknown
Source: vwkjebwi686.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_2e3f67a9 Author: unknown
Source: vwkjebwi686.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_88de437f Author: unknown

Source: vwkjebwi686.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_268aac0b reference_sample = 49c94d184d7e387c3efe34ae6f021e011c3046ae631c9733ab0a230d5fe28ead, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 9c581721bf82af7dc6482a2c41af5fb3404e01c82545c7b2b29230f707014781, id = 268aac0b-c5c7-4035-8381-4e182de91e32, last_modified = 2021-09-16
Source: vwkjebwi686.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_0cb1699c reference_sample = fc8741f67f39e7409ab2c6c62d4f9acdd168d3e53cf6976dd87501833771cacb, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 6e44c68bba8c9fb53ac85080b9ad765579f027cabfea5055a0bb3a85b8671089, id = 0cb1699c-9a08-4885-aa7f-0f1ee2543cac, last_modified = 2021-09-16
Source: vwkjebwi686.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_70ef58f1 reference_sample = fc8741f67f39e7409ab2c6c62d4f9acdd168d3e53cf6976dd87501833771cacb, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = c46eac9185e5f396456004d1e0c42b54a9318e0450f797c55703122cfb8fea89, id = 70ef58f1-ac74-4e33-ae03-e68d1d5a4379, last_modified = 2021-09-16
Source: vwkjebwi686.elf, type: SAMPLE	Matched rule: Linux_Trojan_Mirai_2e3f67a9 reference_sample = fc8741f67f39e7409ab2c6c62d4f9acdd168d3e53cf6976dd87501833771cacb, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 6a06815f3d2e5f1a7a67f4264953dbb2e9d14e5f3486b178da845eab5b922d4f, id = 2e3f67a9-6fd5-4457-a626-3a9015bdb401, last_modified = 2021-09-16
Source: vwkjebwi686.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: classification engine

Classification label: mal52.linELF@0/0@0/0

Source: /usr/bin/dash (PID: 6201)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.Rb0rnMx73G /tmp/tmp.1q0iCLCJwr /tmp/tmp.ZVC81Ci7Ku			Jump to behavior
Source: /usr/bin/dash (PID: 6202)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.Rb0rnMx73G /tmp/tmp.1q0iCLCJwr /tmp/tmp.ZVC81Ci7Ku			Jump to behavior

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	1 File Deletion	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 Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service

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
vwkjebwi686.elf	100%	Joe Sandbox ML

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

⊘No contacted domains info

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	ASN	ASN Name	Malicious
109.202.202.202	unknown	Switzerland	13030	INIT7CH	false
91.189.91.43	unknown	United Kingdom	41231	CANONICAL-ASGB	false
91.189.91.42	unknown	United Kingdom	41231	CANONICAL-ASGB	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
109.202.202.202	kpLwzBouH4.elf	Get hash	malicious	Unknown	Browse	ch.archive.ubuntu.com/ubuntu/pool/main/f/firefox/firefox_92.0%2bbuild3-0ubuntu0.20.04.1_amd64.deb
91.189.91.43	la.bot.arc.elf	Get hash	malicious	Mirai	Browse
	loligang.m68k.elf	Get hash	malicious	Mirai	Browse
	Mozi.m.elf	Get hash	malicious	Mirai	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	vwkjebwi686.elf	Get hash	malicious	Unknown	Browse
	boatnet.x86.elf	Get hash	malicious	Mirai	Browse
	i.elf	Get hash	malicious	Unknown	Browse
	pXdN91.armv5l.elf	Get hash	malicious	Mirai, Gafgyt	Browse
	pXdN91.mips.elf	Get hash	malicious	Mirai, Gafgyt	Browse
91.189.91.42	la.bot.arc.elf	Get hash	malicious	Mirai	Browse
	loligang.m68k.elf	Get hash	malicious	Mirai	Browse
	Mozi.m.elf	Get hash	malicious	Mirai	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	vwkjebwi686.elf	Get hash	malicious	Unknown	Browse
	boatnet.x86.elf	Get hash	malicious	Mirai	Browse
	i.elf	Get hash	malicious	Unknown	Browse
	pXdN91.armv5l.elf	Get hash	malicious	Mirai, Gafgyt	Browse
	pXdN91.mips.elf	Get hash	malicious	Mirai, Gafgyt	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	la.bot.arc.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	loligang.m68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	Mozi.m.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	vwkjebwi686.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	boatnet.x86.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	sshd.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	pXdN91.armv4l.elf	Get hash	malicious	Mirai, Gafgyt	Browse	185.125.190.26
CANONICAL-ASGB	la.bot.arc.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	loligang.m68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	Mozi.m.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	vwkjebwi686.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	boatnet.x86.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	sshd.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	pXdN91.armv4l.elf	Get hash	malicious	Mirai, Gafgyt	Browse	185.125.190.26
INIT7CH	la.bot.arc.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	loligang.m68k.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	Mozi.m.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	.i.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	vwkjebwi686.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	boatnet.x86.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	i.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	pXdN91.armv5l.elf	Get hash	malicious	Mirai, Gafgyt	Browse	109.202.202.202
	pXdN91.mips.elf	Get hash	malicious	Mirai, Gafgyt	Browse	109.202.202.202

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, missing section headers at 123044
Entropy (8bit):	6.208811363038711
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 50.16% ELF Executable and Linkable format (generic) (4004/1) 49.84%
File name:	vwkjebwi686.elf
File size:	64'439 bytes
MD5:	631f090c1133212882b3d513a6e5a5a3
SHA1:	ad56b21d783f27b4d3df69250e4106b3057547d2
SHA256:	9f994925d0cfc6b62edb53f7d3192a28b616d79d7faf6f5063359c071540b9f9
SHA512:	fb6dffc293422ac09a80dbc4cc39dd1c8aca34ffb8e7ab0b4b4ee51b43aa702e819fab11b701272b9adc483efb61765003558d6bfd9e2a92e67aaedf52a857f3
SSDEEP:	1536:nbm9L6IGENI/TDrqjtDSDO6HX5YDUcNIrDBaQd85ktGNqZyWoMG:bmN5GEy/TydupYDzIrDHd85kANmRG
TLSH:	8B531600B54B81F5C95B493091ABF23FCA32D43991719AAEDF99AF32CF77542D20A25C
File Content Preview:	.ELF....................h...4...<.......4. ...(.....................s...s...............x...x'..x'...G..............Q.td............................U..S............h....3j..[]...$.............U......=.o...t..1.....'......'......u........t...$t...........o

Network Behavior

Network Port Distribution

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Nov 25, 2024 19:01:44.588327885 CET	43928	443	192.168.2.23	91.189.91.42
Nov 25, 2024 19:01:50.219717979 CET	42836	443	192.168.2.23	91.189.91.43
Nov 25, 2024 19:01:51.755281925 CET	42516	80	192.168.2.23	109.202.202.202
Nov 25, 2024 19:02:04.809612036 CET	43928	443	192.168.2.23	91.189.91.42
Nov 25, 2024 19:02:17.095756054 CET	42836	443	192.168.2.23	91.189.91.43
Nov 25, 2024 19:02:21.191364050 CET	42516	80	192.168.2.23	109.202.202.202
Nov 25, 2024 19:02:45.763746023 CET	43928	443	192.168.2.23	91.189.91.42

System Behavior

Analysis Process: dash PID: 6201, Parent PID: 4333

General

Start time (UTC):	18:01:36
Start date (UTC):	25/11/2024
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 6201, Parent PID: 4333

General

Start time (UTC):	18:01:36
Start date (UTC):	25/11/2024
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.Rb0rnMx73G /tmp/tmp.1q0iCLCJwr /tmp/tmp.ZVC81Ci7Ku
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: dash PID: 6202, Parent PID: 4333

General

Start time (UTC):	18:01:36
Start date (UTC):	25/11/2024
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 6202, Parent PID: 4333

General

Start time (UTC):	18:01:36
Start date (UTC):	25/11/2024
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.Rb0rnMx73G /tmp/tmp.1q0iCLCJwr /tmp/tmp.ZVC81Ci7Ku
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Description:	Adversaries may delete files left behind by the actions of their intrusion activity. Malware, tools, or other non-native files dropped or created on a system by an adversary (ex: Ingress Tool Transfer ) may leave traces to indicate to what was done within a network and how. Removal of these files can occur during an intrusion, or as part of a post-intrusion process to minimize the adversary's footprint.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Deletion
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

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 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 vwkjebwi686.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Warnings

Runtime Messages

Process Tree

Yara Signatures

Initial Sample

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Persistence and Installation Behavior

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

Public IPs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

Network Behavior

Network Port Distribution

TCP Packets

System Behavior

Analysis Process: dash PID: 6201, Parent PID: 4333

General

Chronological Activities

Analysis Process: rm PID: 6201, Parent PID: 4333

General

Chronological Activities

Analysis Process: dash PID: 6202, Parent PID: 4333

General

Chronological Activities

Analysis Process: rm PID: 6202, Parent PID: 4333

General

Chronological Activities

Linux Analysis Report
vwkjebwi686.elf