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Linux Analysis Report
frosty.arm5.elf

Overview

General Information

Sample name:	frosty.arm5.elf
Analysis ID:	1648910
MD5:	95e11ececeea025ca342cc5c414380f9
SHA1:	ede9947bd603742ea467e6fb47db023e13868074
SHA256:	429a86088027bf5058d53ba501211336924d2b291c40e71cd6856da74cbe9afe
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100

Signatures

Multi AV Scanner detection for submitted file

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

Sample has stripped symbol table

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

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1648910
Start date and time:	2025-03-26 10:23:54 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 10m 48s
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:	frosty.arm5.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@0/0
Cookbook Comments:	Analysis time extended to 480s due to sleep detection in submitted sample

Warnings

Max analysis timeout: 600s exceeded, the analysis took too long

Runtime Messages

Command:	/tmp/frosty.arm5.elf
PID:	6253
Exit Code:	255
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:	/lib/ld-uClibc.so.0: No such file or directory

Process Tree

system is lnxubuntu20

frosty.arm5.elf (PID: 6253, Parent: 6175, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/frosty.arm5.elf

dash New Fork (PID: 6310, Parent: 4341)

rm (PID: 6310, Parent: 4341, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.Ok8lMVU7ld /tmp/tmp.LJefuUWawn /tmp/tmp.L2eCN24RDj

dash New Fork (PID: 6311, Parent: 4341)

rm (PID: 6311, Parent: 4341, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.Ok8lMVU7ld /tmp/tmp.LJefuUWawn /tmp/tmp.L2eCN24RDj

cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• AV Detection
• Networking
• System Summary
• Persistence and Installation Behavior
• Malware Analysis System Evasion

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: frosty.arm5.elf	Virustotal: Detection: 31%			Perma Link
Source: frosty.arm5.elf	ReversingLabs: Detection: 38%

Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown	TCP traffic detected without corresponding DNS query: 34.249.145.219
Source: unknown	TCP traffic detected without corresponding DNS query: 34.249.145.219
Source: unknown	TCP traffic detected without corresponding DNS query: 34.249.145.219
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: 34.249.145.219

Source: frosty.arm5.elf	String found in binary or memory: http://154.213.189.145/icy.sh
Source: frosty.arm5.elf	String found in binary or memory: http://schemas.xmlsoap.org/soap/encoding/
Source: frosty.arm5.elf	String found in binary or memory: http://schemas.xmlsoap.org/soap/envelope/

Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 39254
Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 39254 -> 443

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

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

Source: /usr/bin/dash (PID: 6310)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.Ok8lMVU7ld /tmp/tmp.LJefuUWawn /tmp/tmp.L2eCN24RDj			Jump to behavior
Source: /usr/bin/dash (PID: 6311)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.Ok8lMVU7ld /tmp/tmp.LJefuUWawn /tmp/tmp.L2eCN24RDj			Jump to behavior

Source: /tmp/frosty.arm5.elf (PID: 6253)

Queries kernel information via 'uname':

Jump to behavior

Source: frosty.arm5.elf, 6253.1.00007ffde0535000.00007ffde0556000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/frosty.arm5.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/frosty.arm5.elf
Source: frosty.arm5.elf, 6253.1.000055dd78f42000.000055dd79070000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: frosty.arm5.elf, 6253.1.00007ffde0535000.00007ffde0556000.rw-.sdmp	Binary or memory string: qemu: %s: %s
Source: frosty.arm5.elf, 6253.1.00007ffde0535000.00007ffde0556000.rw-.sdmp	Binary or memory string: leqemu: %s: %s
Source: frosty.arm5.elf, 6253.1.000055dd78f42000.000055dd79070000.rw-.sdmp	Binary or memory string: Urg.qemu.gdb.arm.sys.regs">
Source: frosty.arm5.elf, 6253.1.000055dd78f42000.000055dd79070000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: frosty.arm5.elf, 6253.1.00007ffde0535000.00007ffde0556000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: frosty.arm5.elf, 6253.1.000055dd78f42000.000055dd79070000.rw-.sdmp	Binary or memory string: rg.qemu.gdb.arm.sys.regs">

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	11 Security Software 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

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Legend:

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

Screenshots

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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
frosty.arm5.elf	31%	Virustotal		Browse
frosty.arm5.elf	39%	ReversingLabs	Linux.Trojan.Mirai

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Download Network PCAP: filtered – full

Contacted Domains

⊘No contacted domains info

URLs from Memory and Binaries

Name	Source	Malicious	Reputation
http://154.213.189.145/icy.sh	frosty.arm5.elf	false	high
http://schemas.xmlsoap.org/soap/encoding/	frosty.arm5.elf	false	high
http://schemas.xmlsoap.org/soap/envelope/	frosty.arm5.elf	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	ASN	ASN Name	Malicious
34.249.145.219	unknown	United States	16509	AMAZON-02US	false
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
34.249.145.219	frosty.mpsl.elf	Get hash	malicious	Unknown	Browse
	frosty.mips.elf	Get hash	malicious	Unknown	Browse
	GoldAge3ATOmips.elf	Get hash	malicious	Unknown	Browse
	GoldAge3ATOsh4.elf	Get hash	malicious	Unknown	Browse
	sshd.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	arm.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	morte.arm7.elf	Get hash	malicious	Unknown	Browse
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	frosty.mpsl.elf	Get hash	malicious	Unknown	Browse
	frosty.mips.elf	Get hash	malicious	Unknown	Browse
	GoldAge3ATOmips.elf	Get hash	malicious	Unknown	Browse
	GoldAge3ATOsh4.elf	Get hash	malicious	Unknown	Browse
	m68k.elf	Get hash	malicious	Unknown	Browse
	spc.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	sshd.elf	Get hash	malicious	Unknown	Browse
	arm6.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
91.189.91.42	frosty.mpsl.elf	Get hash	malicious	Unknown	Browse
	frosty.mips.elf	Get hash	malicious	Unknown	Browse
	GoldAge3ATOmips.elf	Get hash	malicious	Unknown	Browse
	GoldAge3ATOsh4.elf	Get hash	malicious	Unknown	Browse
	m68k.elf	Get hash	malicious	Unknown	Browse
	spc.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	sshd.elf	Get hash	malicious	Unknown	Browse
	arm6.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	frosty.mpsl.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	frosty.mips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	185.125.190.26
	GoldAge3ATOmips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	GoldAge3ATOsh4.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	m68k.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	spc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	sshd.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	185.125.190.26
CANONICAL-ASGB	frosty.mpsl.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	frosty.mips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	185.125.190.26
	GoldAge3ATOmips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	GoldAge3ATOsh4.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	m68k.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	spc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	sshd.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	185.125.190.26
INIT7CH	frosty.mpsl.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	frosty.mips.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	GoldAge3ATOmips.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	GoldAge3ATOsh4.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	m68k.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	spc.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	sshd.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	arm6.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
AMAZON-02US	http://support.delfi.com	Get hash	malicious	Unknown	Browse	52.217.163.192
	frosty.x86.elf	Get hash	malicious	Unknown	Browse	52.35.74.183
	frosty.mpsl.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	frosty.mips.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	frosty.spc.elf	Get hash	malicious	Unknown	Browse	63.32.132.7
	na.elf	Get hash	malicious	Prometei	Browse	54.247.62.1
	GoldAge3ATOmips.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	GoldAge3ATOsh4.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	https://document-baol.b12sites.com/	Get hash	malicious	Unknown	Browse	13.249.91.90
	https://go.skimresources.com/?id=129857X1600501&url=https://gamma.app/docs/Ukibc-egg8llx0v1a6920?mode=present#card-n3aknjh8lm0v6m5	Get hash	malicious	HTMLPhisher, Invisible JS, Tycoon2FA	Browse	108.139.47.21

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, ARM, version 1 (ARM), dynamically linked, interpreter /lib/ld-uClibc.so.0, stripped
Entropy (8bit):	6.222355780898086
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	frosty.arm5.elf
File size:	36'140 bytes
MD5:	95e11ececeea025ca342cc5c414380f9
SHA1:	ede9947bd603742ea467e6fb47db023e13868074
SHA256:	429a86088027bf5058d53ba501211336924d2b291c40e71cd6856da74cbe9afe
SHA512:	10cb61cdb819b59527710c27db12880f5ec83c9bc87918f79c84a2c5ed0451a1ec2d5127d4242a8407496ef353c201bed6398c2896c3be2b97aab75b6498a0a9
SSDEEP:	768:hcffYtfAz/xwqJKfPmmnbenTgGnZ7bX3PGlczUoBxDiLmcCyoSwABo:hNtUeqJwmmnNGZvX/Oc+mcISwAO
TLSH:	06F20956BCE2CE1AC6D421B6BF1E507D3320A3DCD2CA37039E145B643ACB55E5EA7A04
File Content Preview:	.ELF...a..........(.....8...4...\.......4. ...(.........4...4...4...................................................................P...P...............T...T...T.......................h...h...h...................Q.td............................/lib/ld-uCl

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:	ARM - ABI
ABI Version:	0
Entry Point Address:	0x8e38
Flags:	0x2
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	6
Section Header Offset:	35420
Section Header Size:	40
Number of Section Headers:	18
Header String Table Index:	17

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Link	Info	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0	0	0
.interp	PROGBITS	0x80f4	0xf4	0x14	0x0	0x2	A	0	0	1
.hash	HASH	0x8108	0x108	0x220	0x4	0x2	A	3	0	4
.dynsym	DYNSYM	0x8328	0x328	0x430	0x10	0x2	A	4	1	4
.dynstr	STRTAB	0x8758	0x758	0x225	0x0	0x2	A	0	0	1
.rel.plt	REL	0x8980	0x980	0x178	0x8	0x2	A	3	7	4
.init	PROGBITS	0x8af8	0xaf8	0x18	0x0	0x6	AX	0	0	4
.plt	PROGBITS	0x8b10	0xb10	0x248	0x4	0x6	AX	0	0	4
.text	PROGBITS	0x8d58	0xd58	0x6d00	0x0	0x6	AX	0	0	4
.fini	PROGBITS	0xfa58	0x7a58	0x14	0x0	0x6	AX	0	0	4
.rodata	PROGBITS	0xfa6c	0x7a6c	0xde4	0x0	0x2	A	0	0	4
.ctors	PROGBITS	0x18854	0x8854	0x8	0x0	0x3	WA	0	0	4
.dtors	PROGBITS	0x1885c	0x885c	0x8	0x0	0x3	WA	0	0	4
.dynamic	DYNAMIC	0x18868	0x8868	0x98	0x8	0x3	WA	4	0	4
.got	PROGBITS	0x18900	0x8900	0xc8	0x4	0x3	WA	0	0	4
.data	PROGBITS	0x189c8	0x89c8	0x20	0x0	0x3	WA	0	0	4
.bss	NOBITS	0x189e8	0x89e8	0x340	0x0	0x3	WA	0	0	4
.shstrtab	STRTAB	0x0	0x89e8	0x73	0x0	0x0		0	0	1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Prog Interpreter	Section Mappings
PHDR	0x34	0x8034	0x8034	0xc0	0xc0	2.2629	0x5	R E	0x4
INTERP	0xf4	0x80f4	0x80f4	0x14	0x14	3.6842	0x4	R	0x1	/lib/ld-uClibc.so.0	.interp
LOAD	0x0	0x8000	0x8000	0x8850	0x8850	6.2883	0x5	R E	0x8000		.interp .hash .dynsym .dynstr .rel.plt .init .plt .text .fini .rodata
LOAD	0x8854	0x18854	0x18854	0x194	0x4d4	2.2441	0x6	RW	0x8000		.ctors .dtors .dynamic .got .data .bss
DYNAMIC	0x8868	0x18868	0x18868	0x98	0x98	1.8127	0x6	RW	0x4		.dynamic
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Dynamic Tags

Type	Meta	Value	Tag
DT_NEEDED	sharedlib	libc.so.0	0x1
DT_INIT	value	0x8af8	0xc
DT_FINI	value	0xfa58	0xd
DT_HASH	value	0x8108	0x4
DT_STRTAB	value	0x8758	0x5
DT_SYMTAB	value	0x8328	0x6
DT_STRSZ	bytes	549	0xa
DT_SYMENT	bytes	16	0xb
DT_DEBUG	value	0x0	0x15
DT_PLTGOT	value	0x18900	0x3
DT_PLTRELSZ	bytes	376	0x2
DT_PLTREL	pltrel	DT_REL	0x14
DT_JMPREL	value	0x8980	0x17
DT_NULL	value	0x0	0x0

Symbols

Name	Section Name	Value	Size	Symbol Type	Symbol Bind	Symbol Visibility	Ndx
	.dynsym	0x0	0	NOTYPE	<unknown>	DEFAULT	SHN_UNDEF
__aeabi_idiv0	.dynsym	0xfa18	4	FUNC	<unknown>	DEFAULT	8
__aeabi_ldiv0	.dynsym	0xfa18	4	FUNC	<unknown>	DEFAULT	8
__aeabi_uidiv	.dynsym	0xf758	0	FUNC	<unknown>	DEFAULT	8
__aeabi_uidivmod	.dynsym	0xf850	24	FUNC	<unknown>	DEFAULT	8
__bss_end__	.dynsym	0x18d28	0	NOTYPE	<unknown>	DEFAULT	SHN_ABS
__bss_start	.dynsym	0x189e8	0	NOTYPE	<unknown>	DEFAULT	SHN_ABS
__bss_start__	.dynsym	0x189e8	0	NOTYPE	<unknown>	DEFAULT	SHN_ABS
__data_start	.dynsym	0x189c8	0	NOTYPE	<unknown>	DEFAULT	17
__div0	.dynsym	0xfa18	4	FUNC	<unknown>	DEFAULT	8
__end__	.dynsym	0x18d28	0	NOTYPE	<unknown>	DEFAULT	SHN_ABS
__errno_location	.dynsym	0x8cd4	32	FUNC	<unknown>	DEFAULT	SHN_UNDEF
__modsi3	.dynsym	0xf934	228	FUNC	<unknown>	DEFAULT	8
__uClibc_main	.dynsym	0x8c8c	488	FUNC	<unknown>	DEFAULT	SHN_UNDEF
__udivsi3	.dynsym	0xf758	248	FUNC	<unknown>	DEFAULT	8
__umodsi3	.dynsym	0xf868	204	FUNC	<unknown>	DEFAULT	8
_bss_end__	.dynsym	0x18d28	0	NOTYPE	<unknown>	DEFAULT	SHN_ABS
_edata	.dynsym	0x189e8	0	NOTYPE	<unknown>	DEFAULT	SHN_ABS
_end	.dynsym	0x18d28	0	NOTYPE	<unknown>	DEFAULT	SHN_ABS
_start	.dynsym	0x8e38	80	FUNC	<unknown>	DEFAULT	8
abort	.dynsym	0x8bf0	352	FUNC	<unknown>	DEFAULT	SHN_UNDEF
accept	.dynsym	0x8bfc	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
bind	.dynsym	0x8c2c	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
calloc	.dynsym	0x8c08	88	FUNC	<unknown>	DEFAULT	SHN_UNDEF
clock	.dynsym	0x8cf8	52	FUNC	<unknown>	DEFAULT	SHN_UNDEF
close	.dynsym	0x8d28	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
closedir	.dynsym	0x8d10	196	FUNC	<unknown>	DEFAULT	SHN_UNDEF
connect	.dynsym	0x8b48	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
exit	.dynsym	0x8ce0	172	FUNC	<unknown>	DEFAULT	SHN_UNDEF
fcntl	.dynsym	0x8d1c	116	FUNC	<unknown>	DEFAULT	SHN_UNDEF
fork	.dynsym	0x8c80	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
free	.dynsym	0x8d34	288	FUNC	<unknown>	DEFAULT	SHN_UNDEF
getpid	.dynsym	0x8b6c	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
getppid	.dynsym	0x8ca4	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
getsockname	.dynsym	0x8d4c	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
getsockopt	.dynsym	0x8cc8	48	FUNC	<unknown>	DEFAULT	SHN_UNDEF
inet_addr	.dynsym	0x8c38	36	FUNC	<unknown>	DEFAULT	SHN_UNDEF
ioctl	.dynsym	0x8b30	80	FUNC	<unknown>	DEFAULT	SHN_UNDEF
kill	.dynsym	0x8c20	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
malloc	.dynsym	0x8b90	400	FUNC	<unknown>	DEFAULT	SHN_UNDEF
memcpy	.dynsym	0x8b84	4	FUNC	<unknown>	DEFAULT	SHN_UNDEF
memmove	.dynsym	0x8b60	4	FUNC	<unknown>	DEFAULT	SHN_UNDEF
memset	.dynsym	0x0	156	FUNC	<unknown>	DEFAULT	SHN_UNDEF
open	.dynsym	0x8cec	92	FUNC	<unknown>	DEFAULT	SHN_UNDEF
opendir	.dynsym	0x8cbc	264	FUNC	<unknown>	DEFAULT	SHN_UNDEF
prctl	.dynsym	0x8b78	48	FUNC	<unknown>	DEFAULT	SHN_UNDEF
read	.dynsym	0x8c5c	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
readdir	.dynsym	0x8bcc	224	FUNC	<unknown>	DEFAULT	SHN_UNDEF
readlink	.dynsym	0x0	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
realloc	.dynsym	0x8c74	312	FUNC	<unknown>	DEFAULT	SHN_UNDEF
recv	.dynsym	0x8b3c	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
recvfrom	.dynsym	0x8ba8	52	FUNC	<unknown>	DEFAULT	SHN_UNDEF
select	.dynsym	0x8bc0	48	FUNC	<unknown>	DEFAULT	SHN_UNDEF
send	.dynsym	0x8be4	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
sendto	.dynsym	0x8c68	52	FUNC	<unknown>	DEFAULT	SHN_UNDEF
setsid	.dynsym	0x8d04	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
setsockopt	.dynsym	0x8c44	48	FUNC	<unknown>	DEFAULT	SHN_UNDEF
sigaddset	.dynsym	0x8bd8	48	FUNC	<unknown>	DEFAULT	SHN_UNDEF
sigemptyset	.dynsym	0x8b54	24	FUNC	<unknown>	DEFAULT	SHN_UNDEF
signal	.dynsym	0x8c50	200	FUNC	<unknown>	DEFAULT	SHN_UNDEF
sigprocmask	.dynsym	0x8d40	84	FUNC	<unknown>	DEFAULT	SHN_UNDEF
sleep	.dynsym	0x8b9c	420	FUNC	<unknown>	DEFAULT	SHN_UNDEF
socket	.dynsym	0x8bb4	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
srand	.dynsym	0x8c98	148	FUNC	<unknown>	DEFAULT	SHN_UNDEF
strcpy	.dynsym	0x8b24	28	FUNC	<unknown>	DEFAULT	SHN_UNDEF
time	.dynsym	0x8cb0	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF
write	.dynsym	0x8c14	44	FUNC	<unknown>	DEFAULT	SHN_UNDEF

Network Behavior

Download Network PCAP: filtered – full

Network Port Distribution

Total Packets: 11
• 443 (HTTPS)
• 80 (HTTP)

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 26, 2025 10:24:52.177160025 CET	43928	443	192.168.2.23	91.189.91.42
Mar 26, 2025 10:24:56.784594059 CET	42516	80	192.168.2.23	109.202.202.202
Mar 26, 2025 10:24:57.552486897 CET	42836	443	192.168.2.23	91.189.91.43
Mar 26, 2025 10:25:01.181366920 CET	39254	443	192.168.2.23	34.249.145.219
Mar 26, 2025 10:25:01.181406975 CET	443	39254	34.249.145.219	192.168.2.23
Mar 26, 2025 10:25:01.181642056 CET	39254	443	192.168.2.23	34.249.145.219
Mar 26, 2025 10:25:01.182094097 CET	39254	443	192.168.2.23	34.249.145.219
Mar 26, 2025 10:25:01.182117939 CET	443	39254	34.249.145.219	192.168.2.23
Mar 26, 2025 10:25:12.398469925 CET	43928	443	192.168.2.23	91.189.91.42
Mar 26, 2025 10:25:24.684776068 CET	42836	443	192.168.2.23	91.189.91.43
Mar 26, 2025 10:25:26.732578993 CET	42516	80	192.168.2.23	109.202.202.202
Mar 26, 2025 10:25:53.352925062 CET	43928	443	192.168.2.23	91.189.91.42
Mar 26, 2025 10:26:01.173718929 CET	39254	443	192.168.2.23	34.249.145.219
Mar 26, 2025 10:26:01.216276884 CET	443	39254	34.249.145.219	192.168.2.23

System Behavior

Analysis Process: frosty.arm5.elf PID: 6253, Parent PID: 6175

General

Start time (UTC):	09:24:51
Start date (UTC):	26/03/2025
Path:	/tmp/frosty.arm5.elf
Arguments:	/tmp/frosty.arm5.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

File Activities

File Opened

File Read

Process Activities

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Analysis Process: dash PID: 6310, Parent PID: 4341

General

Start time (UTC):	09:26:00
Start date (UTC):	26/03/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6310, Parent PID: 4341

General

Start time (UTC):	09:26:00
Start date (UTC):	26/03/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.Ok8lMVU7ld /tmp/tmp.LJefuUWawn /tmp/tmp.L2eCN24RDj
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Analysis Process: dash PID: 6311, Parent PID: 4341

General

Start time (UTC):	09:26:00
Start date (UTC):	26/03/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6311, Parent PID: 4341

General

Start time (UTC):	09:26:00
Start date (UTC):	26/03/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.Ok8lMVU7ld /tmp/tmp.LJefuUWawn /tmp/tmp.L2eCN24RDj
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 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 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 frosty.arm5.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Warnings

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Persistence and Installation Behavior

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

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

Dynamic Tags

Symbols

Network Behavior

Network Port Distribution

TCP Packets

System Behavior

Analysis Process: frosty.arm5.elf PID: 6253, Parent PID: 6175

General

File Activities

File Opened

File Read

Process Activities

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Analysis Process: dash PID: 6310, Parent PID: 4341

General

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6310, Parent PID: 4341

General

File Activities

File Opened

File Deleted

File Read

Linux Analysis Report
frosty.arm5.elf