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Linux Analysis Report
vmpcow.elf

Overview

General Information

Sample name:	vmpcow.elf
Analysis ID:	1545736
MD5:	5df62a68cab91f2fdf4f80667af4d9c3
SHA1:	82661c098f9f8b5f4233432a966186438b6411c8
SHA256:	bad9bff0b3e11481a8874e368f3c0930937237b33bf9b8815a504b2efa858e82
Tags:	elfuser-MDMCk10
Infos:

Detection

Masscan

Score:	68
Range:	0 - 100
Whitelisted:	false

Signatures

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Yara detected Masscan tool

Contains VNC / remote desktop functionality (version string found)

Sample contains only a LOAD segment without any section mappings

Sample contains strings that are potentially command strings

Sample has stripped symbol table

Yara signature match

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1545736
Start date and time:	2024-10-30 22:30:05 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 7s
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:	vmpcow.elf
Detection:	MAL
Classification:	mal68.troj.linELF@0/0@0/0

Warnings

VT rate limit hit for: vmpcow.elf

Runtime Messages

Command:	/tmp/vmpcow.elf
PID:	5506
Exit Code:	1
Exit Code Info:
Killed:	False
Standard Output:	usage: masscan [options] [<IP\|RANGE>... -pPORT[,PORT...]] examples: masscan -p80,8000-8100 10.0.0.0/8 --rate=10000 scan some web ports on 10.x.x.x at 10kpps masscan --nmap list those options that are compatible with nmap masscan -p80 10.0.0.0/8 --banners -oB <filename> save results of scan in binary format to <filename> masscan --open --banners --readscan <filename> -oX <savefile> read binary scan results in <filename> and save them as xml in <savefile>
Standard Error:

Process Tree

system is lnxubuntu20

vmpcow.elf (PID: 5506, Parent: 5430, MD5: 5df62a68cab91f2fdf4f80667af4d9c3) Arguments: /tmp/vmpcow.elf

cleanup

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
vmpcow.elf	JoeSecurity_Masscan	Yara detected Masscan tool	Joe Security
vmpcow.elf	Linux_Hacktool_Portscan_a40c7ef0	unknown	unknown	0x990f8:$a: 54 50 44 00 52 65 73 70 6F 6E 73 65 20 77 61 73 20 4E 54 50 20
vmpcow.elf	Linux_Hacktool_Portscan_e191222d	unknown	unknown	0x99001:$a: 46 4F 55 4E 44 00 56 41 4C 55 45 00 44 45 4C 45 54 45 44 00 54
vmpcow.elf	hacktool_multi_masscan	masscan is a performant port scanner, it produces results similar to nmap	@mimeframe	0x9a1a9:$a1: EHLO masscan 0x91c7c:$a3: /etc/masscan/masscan.conf 0x90568:$b1: nmap(%s): unsupported. This code will never do DNS lookups. 0x907a8:$b2: nmap(%s): unsupported, we do timing WAY different than nmap 0xa3511:$b4: [hint] VMware on Macintosh doesn't support masscan

Suricata Signatures

⊘No Suricata 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: vmpcow.elf

ReversingLabs: Detection: 13%

Networking

Yara detected Masscan tool

Source: Yara match

File source: vmpcow.elf, type: SAMPLE

Source: vmpcow.elf	String found in binary or memory: www.yahoo.com equals www.yahoo.com (Yahoo)
Source: vmpcow.elf	String found in binary or memory: www.yahoo.com0 equals www.yahoo.com (Yahoo)

Source: vmpcow.elf	String found in binary or memory: http://bit.ly/14GZzcT)
Source: vmpcow.elf	String found in binary or memory: http://clients1.google.com/ocsp0
Source: vmpcow.elf	String found in binary or memory: http://crl.geotrust.com/crls/gtglobal.crl0=
Source: vmpcow.elf	String found in binary or memory: http://crl.geotrust.com/crls/secureca.crl0N
Source: vmpcow.elf	String found in binary or memory: http://failsafe.fp.yahoo.com/404.html
Source: vmpcow.elf	String found in binary or memory: http://gtglobal-ocsp.geotrust.com0
Source: vmpcow.elf	String found in binary or memory: http://nmap.org/svn/docs/nmap.xsl
Source: vmpcow.elf	String found in binary or memory: http://nmap.org/svn/docs/nmap.xslCONF:
Source: vmpcow.elf	String found in binary or memory: http://pki.google.com/GIAG2.crl0
Source: vmpcow.elf	String found in binary or memory: http://pki.google.com/GIAG2.crt0
Source: vmpcow.elf	String found in binary or memory: https://github.com/robertdavidgraham/
Source: vmpcow.elf	String found in binary or memory: https://github.com/robertdavidgraham/masscan
Source: vmpcow.elf	String found in binary or memory: https://github.com/robertdavidgraham/masscan)
Source: vmpcow.elf	String found in binary or memory: https://github.com/robertdavidgraham/masscanCONF:
Source: vmpcow.elf	String found in binary or memory: https://www.geotrust.com/resources/repository0

System Summary

Malicious sample detected (through community Yara rule)

Source: vmpcow.elf, type: SAMPLE	Matched rule: Linux_Hacktool_Portscan_a40c7ef0 Author: unknown
Source: vmpcow.elf, type: SAMPLE	Matched rule: Linux_Hacktool_Portscan_e191222d Author: unknown
Source: vmpcow.elf, type: SAMPLE	Matched rule: masscan is a performant port scanner, it produces results similar to nmap Author: @mimeframe

Source: LOAD without section mappings

Program segment: 0x400000

Source: Initial sample	Potential command found: GET /version HTTP/1.1
Source: Initial sample	Potential command found: GET / HTTP/1.0
Source: Initial sample	Potential command found: GET / HTTP/1.1
Source: Initial sample	Potential command found: GET / FOO
Source: Initial sample	Potential command found: GET / XXXXXXXXXXXX
Source: Initial sample	Potential command found: GET / HTTP/1.1
Source: Initial sample	Potential command found: GET /foo.html
Source: Initial sample	Potential command found: GET /foo.html HTTP/1.0
Source: Initial sample	Potential command found: GET /longerthan HTTP/1.0
Source: Initial sample	Potential command found: GET /foo.html HTTP/1.0
Source: Initial sample	Potential command found: GET /foo.htmlGET /foo.html HTTP/1.0
Source: Initial sample	Potential command found: arp does not encapsulate another protocol

Source: ELF static info symbol of initial sample

.symtab present: no

Source: vmpcow.elf, type: SAMPLE	Matched rule: Linux_Hacktool_Portscan_a40c7ef0 reference_sample = c389c42bac5d4261dbca50c848f22c701df4c9a2c5877dc01e2eaa81300bdc29, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Hacktool.Portscan, fingerprint = bf686c3c313936a144265cbf75850c8aee3af3ae36cb571050c7fceed385451d, id = a40c7ef0-627c-4965-b4d3-b05b79586170, last_modified = 2021-09-16
Source: vmpcow.elf, type: SAMPLE	Matched rule: Linux_Hacktool_Portscan_e191222d reference_sample = e2f4313538c3ef23adbfc50f37451c318bfd1ffd0e5aaa346cce4cc37417f812, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Hacktool.Portscan, fingerprint = 5580dd8b9180b8ff36c7d08a134b1b3782b41054d8b29b23fc5a79e7b0059fd1, id = e191222d-633a-4408-9a54-a70bb9e89cc0, last_modified = 2021-09-16
Source: vmpcow.elf, type: SAMPLE	Matched rule: hacktool_multi_masscan author = @mimeframe, description = masscan is a performant port scanner, it produces results similar to nmap, reference = https://github.com/robertdavidgraham/masscan

Source: classification engine

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

Source: vmpcow.elf	Binary or memory string: [hint] VMware on Macintosh doesn't support masscan
Source: vmpcow.elf	Binary or memory string: VMware
Source: vmpcow.elf	Binary or memory string: vmnet1
Source: vmpcow.elf	Binary or memory string: subject[VMware ESX Server Default Certificate]
Source: vmpcow.elf	Binary or memory string: icmperrcwr-ece-urg-ack-psh-rst-syn-fin-CompulabAaeonICPelecVMwareSeagateSynologyAsusD-LinkAppleAzurewaveOdroidRPi 22-11SupermicroCiscoUbiquiti[random]AmazonRPi 22-02HPRPi 20-07Cisco-LinksysRPi 19-12ZyxelTrolinkBelkinRPi 19-03RPi 12-03CeLinkNetgearParrotunknown status type: %u
Source: vmpcow.elf	Binary or memory string: issuer[VMware Inc]
Source: vmpcow.elf	Binary or memory string: ---------------nasend~~]issuer[iPECS]issuer[McAfeeissuer[webmin]issuer[Webmin subject[HP-IPG]issuer[LaCie SA]subject[OpenWrt]issuer[Puppet CAissuer[Kasperskysubject[Fortinet]issuer[ICC-FW CA]issuer[HIKVISION]subject[SHARP MX-issuer[GANDI SAS]subject[FortiGate]issuer[watchguard]issuer[VMware Inc]issuer[eBox Server]subject[WatchGuard]issuer[RapidSSL CA]issuer[AddTrust AB]issuer[Cisco SSCA2]subject[Cisco SSCA2]issuer[v] issuer[v]issuer[Register.com]issuer[Thawte, Inc.]issuer[thawte, Inc.]issuer[EQ-MT-RAPTOR]issuer[DigiCert Inc]issuer[TERENA SSL CA]issuer[WatchGuard CA]issuer[OpenVPN Web CAissuer[GeoTrust Inc.]issuer[TS Series NAS]subject[Polycom Inc.]issuer[Fortinet Ltd.]issuer[Synology Inc.]issuer[XX] issuer[XX]2Wire]Gateway Device]subject[DigiCert Inc]issuer[SamsungTechwin]issuer[TAIWAN-CA INC.]issuer[GeoTrust, Inc.]issuer[ValiCert, Inc.]issuer[Apache Friends]issuer[VeriSign, Inc.]issuer[Cybertrust Inc]subject[HiTRON SYSTEMS]issuer[SonicWALL, Inc.]issuer[Future Systems.]issuer[Polycom Root CA]issuer[AlphaSSL CA - G2]issuer[GlobalSign nv-sa]SonicWALL, Inc.]SSL-VPN]issuer[Comodo CA Limited]issuer[COMODO CA Limited]issuer[GoDaddy.com, Inc.]subject[Barracuda Networks]issuer[Equifax Secure Inc.]issuer[Gandi Standard SSL CA]issuer[The USERTRUST Network]subject[Polycom] subject[VSG]issuer[EuropeanSSL Server CA]issuer[SuSE Linux Web Server]issuer[CradlePoint Technology]SonicWALL]Secure Remote Access]subject[SomeOrganizationalUnit]issuer[Internet Widgits Pty Ltd]issuer[Network Solutions L.L.C.]issuer[The Go Daddy Group, Inc.]issuer[Nepenthes Development Team]issuer[WoSign Class 1 DV Server CA]issuer[Polycom Equipment Policy CA]issuer[Starfield Technologies, Inc.]issuer[Certum Certification Authority]subject[Fujitsu CELVIN(R) NAS Server]SonicWALL, Inc.]Secure Remote Access]issuer[Secure Digital Certificate Signing]issuer[Equifax Secure Certificate Authority]subject[VMware ESX Server Default Certificate]issuer[Cisco Systems] issuer[Cisco Manufacturing CA]truefalseoffline = %s
Source: vmpcow.elf	Binary or memory string: %s: ftell failed (file system error? seen with VMware HGFS bug)
Source: vmpcow.elf	Binary or memory string: if: datalinkvmnet1\Device\NPF_[-] if = not found (err=%d)

Remote Access Functionality

Contains VNC / remote desktop functionality (version string found)

Source: vmpcow.elf	String found in binary or memory: RFB 000.000
Source: vmpcow.elf	String found in binary or memory: RFB 003.003
Source: vmpcow.elf	String found in binary or memory: RFB 003.005
Source: vmpcow.elf	String found in binary or memory: RFB 003.006
Source: vmpcow.elf	String found in binary or memory: RFB 003.007
Source: vmpcow.elf	String found in binary or memory: RFB 003.008
Source: vmpcow.elf	String found in binary or memory: RFB 003.889
Source: vmpcow.elf	String found in binary or memory: RFB 003.009
Source: vmpcow.elf	String found in binary or memory: RFB 004.000
Source: vmpcow.elf	String found in binary or memory: RFB 004.001
Source: vmpcow.elf	String found in binary or memory: RFB 004.002

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	1 Command and Scripting Interpreter	Path Interception	Path Interception	Direct Volume Access	OS Credential Dumping	1 Security Software Discovery	1 Remote Desktop Protocol	Data from Local System	1 Remote Access Software	Exfiltration Over Other Network Medium	Abuse Accessibility Features

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
vmpcow.elf	13%	ReversingLabs	Linux.Hacktool.Prtscan

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

⊘No contacted domains info

URLs from Memory and Binaries

Name	Source	Malicious	Reputation
https://github.com/robertdavidgraham/masscan)	vmpcow.elf	false	unknown
http://pki.google.com/GIAG2.crt0	vmpcow.elf	false	unknown
https://github.com/robertdavidgraham/masscan	vmpcow.elf	false	unknown
https://github.com/robertdavidgraham/masscanCONF:	vmpcow.elf	false	unknown
http://failsafe.fp.yahoo.com/404.html	vmpcow.elf	false	unknown
http://nmap.org/svn/docs/nmap.xsl	vmpcow.elf	false	unknown
http://nmap.org/svn/docs/nmap.xslCONF:	vmpcow.elf	false	unknown
https://github.com/robertdavidgraham/	vmpcow.elf	false	unknown
http://pki.google.com/GIAG2.crl0	vmpcow.elf	false	unknown
http://bit.ly/14GZzcT)	vmpcow.elf	false	unknown

World Map of Contacted IPs

⊘No contacted IP infos

Joe Sandbox View / Context

IPs

⊘No context

Domains

⊘No context

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 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, stripped
Entropy (8bit):	6.543467690172182
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 49.77% ELF Executable and Linkable format (generic) (4004/1) 49.46% Lumena CEL bitmap (63/63) 0.78%
File name:	vmpcow.elf
File size:	869'560 bytes
MD5:	5df62a68cab91f2fdf4f80667af4d9c3
SHA1:	82661c098f9f8b5f4233432a966186438b6411c8
SHA256:	bad9bff0b3e11481a8874e368f3c0930937237b33bf9b8815a504b2efa858e82
SHA512:	9236e293139f1a2353309d7c177e41040559d17fdb8743b1e8b209101dee3ccbcdcf66f72ea2885d234bdf7a4c1f9a280fee3340451f8b0787d0e3efd6553267
SSDEEP:	24576:NFZihv4QvjrgJm1syI0kkk0FkkLkkkPFKL:NHi51vjEJm4F
TLSH:	39055C07B2E314FDC09BC835835FD222BD36B4991125797F2A88DA342E67F315B69B21
File Content Preview:	.ELF..............>......!@.....@........@..........@.8...@.......................@.......@...............................................@.......@...............................................H.......H.....`.......`.......................P.......P.L....

Static ELF Info

ELF header
Class:	ELF64
Data:	2's complement, little endian
Version:	1 (current)
Machine:	Advanced Micro Devices X86-64
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x4021fa
Flags:	0x0
ELF Header Size:	64
Program Header Offset:	64
Program Header Size:	56
Number of Program Headers:	7
Section Header Offset:	868536
Section Header Size:	64
Number of Section Headers:	16
Header String Table Index:	15

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x401000	0x1000	0x3	0x0	0x6	AX	1
.text	PROGBITS	0x401010	0x1010	0x881f7	0x0	0x6	AX	16
.fini	PROGBITS	0x489207	0x89207	0x3	0x0	0x6	AX	1
.rodata	PROGBITS	0x48a000	0x8a000	0x33050	0x0	0x2	A	32
.eh_frame	PROGBITS	0x4bd050	0xbd050	0xdf10	0x0	0x2	A	8
.tbss	NOBITS	0x4cc950	0xcb950	0x142	0x0	0x403	WAT	1
.init_array	INIT_ARRAY	0x4cc950	0xcb950	0x8	0x8	0x3	WA	8
.fini_array	FINI_ARRAY	0x4cc958	0xcb958	0x8	0x8	0x3	WA	8
.data.rel.ro	PROGBITS	0x4cc960	0xcb960	0x3690	0x0	0x3	WA	32
.got	PROGBITS	0x4cfff0	0xceff0	0x8	0x0	0x3	WA	8
.got.plt	PROGBITS	0x4d0000	0xcf000	0x18	0x8	0x3	WA	8
.data	PROGBITS	0x4d0020	0xcf020	0x4fc8	0x0	0x3	WA	32
.bss	NOBITS	0x4d5000	0xd3fe8	0x1065d8	0x0	0x3	WA	32
.comment	PROGBITS	0x0	0xd3fe8	0x50	0x1	0x30	MS	1
.shstrtab	STRTAB	0x0	0xd4038	0x7c	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x400000	0x400000	0x1c8	0x1c8	2.0717	0x4	R	0x1000
LOAD	0x1000	0x401000	0x401000	0x8820a	0x8820a	6.3075	0x5	R E	0x1000	.init .text .fini
LOAD	0x8a000	0x48a000	0x48a000	0x40f60	0x40f60	6.7325	0x4	R	0x1000	.rodata .eh_frame
LOAD	0xcb950	0x4cc950	0x4cc950	0x8698	0x10ec88	3.5962	0x6	RW	0x1000	.tbss .init_array .fini_array .data.rel.ro .got .got.plt .data .bss
TLS	0xcb950	0x4cc950	0x4cc950	0x0	0x142	0.0000	0x4	R	0x1	.tbss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x6	RW	0x10
GNU_RELRO	0xcb950	0x4cc950	0x4cc950	0x36b0	0x36b0	2.4531	0x4	R	0x1	.tbss .init_array .fini_array .data.rel.ro .got

Network Behavior

⊘No network behavior found

System Behavior

Analysis Process: vmpcow.elf PID: 5506, Parent PID: 5430

General

Start time (UTC):	21:30:44
Start date (UTC):	30/10/2024
Path:	/tmp/vmpcow.elf
Arguments:	/tmp/vmpcow.elf
File size:	869560 bytes
MD5 hash:	5df62a68cab91f2fdf4f80667af4d9c3

Description:	Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries. These interfaces and languages provide ways of interacting with computer systems and are a common feature across many different platforms. Most systems come with some built-in command-line interface and scripting capabilities, for example, macOS and Linux distributions include some flavor of Unix Shell while Windows installations include the Windows Command Shell and PowerShell .
Tactics:	Execution
Data Sources:	Command: Command Execution, Module: Module Load, Process: Process Creation, Process: Process Metadata, Script: Script Execution
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Network, Office 365, 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 Valid Accounts to log into a computer using the Remote Desktop Protocol (RDP). The adversary may then perform actions as the logged-on user.
Tactics:	Lateral Movement
Data Sources:	Logon Session: Logon Session Creation, Logon Session: Logon Session Metadata, Network Traffic: Network Connection Creation, Network Traffic: Network Traffic Flow, Process: Process Creation
Platforms:	Windows
Url:	Open detailed description by Mitre

Description:	An adversary may use legitimate desktop support and remote access software to establish an interactive command and control channel to target systems within networks. These services, such as `VNC`, `Team Viewer`, `AnyDesk`, `ScreenConnect`, `LogMein`, `AmmyyAdmin`, and other remote monitoring and management (RMM) tools, are commonly used as legitimate technical support software and may be allowed by application control within a target environment.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Connection Creation, Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow, Process: Process Creation
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 vmpcow.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

Malware Analysis System Evasion

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

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

System Behavior

Analysis Process: vmpcow.elf PID: 5506, Parent PID: 5430

General

Chronological Activities

Linux Analysis Report
vmpcow.elf