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Linux Analysis Report
linux_mipsel.elf

Overview

General Information

Sample name:	linux_mipsel.elf
Analysis ID:	1644782
MD5:	0a726ddab4af1ad1c0370d205d367cb3
SHA1:	7378a0ac31c458985753d3f3b8da1ca460f79043
SHA256:	5e74711ff4d14b247f790792c25b2b39287ca3d2becfe5efe0c964d2ba4c24cd
Tags:	elfuser-abuse_ch
Infos:

Detection

Chaos

Score:	56
Range:	0 - 100

Signatures

Multi AV Scanner detection for submitted file

Yara detected Chaos

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:	1644782
Start date and time:	2025-03-20 23:44:17 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 46s
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:	linux_mipsel.elf
Detection:	MAL
Classification:	mal56.troj.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/linux_mipsel.elf
PID:	6246
Exit Code:	2
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:	fatal error: sigaction failed runtime stack: runtime.throw({0x3a34cf, 0x10}) /usr/lib/go-1.18/src/runtime/panic.go:992 +0x60 runtime.sysSigaction.func1() /usr/lib/go-1.18/src/runtime/os_linux.go:529 +0x48 runtime.sysSigaction(0x41, 0x7ffffd10, 0x0) /usr/lib/go-1.18/src/runtime/os_linux.go:528 +0x78 runtime.sigaction(0x41, 0x7ffffd10, 0x0) /usr/lib/go-1.18/src/runtime/sigaction.go:15 +0x28 runtime.setsig(0x41, 0x6c884) /usr/lib/go-1.18/src/runtime/os_linux.go:478 +0xb4 runtime.initsig(0x0) /usr/lib/go-1.18/src/runtime/signal_unix.go:147 +0x294 runtime.mstartm0() /usr/lib/go-1.18/src/runtime/proc.go:1442 +0x6c runtime.mstart1() /usr/lib/go-1.18/src/runtime/proc.go:1414 +0x90 runtime.mstart0() /usr/lib/go-1.18/src/runtime/proc.go:1376 +0x74 runtime.mstart() /usr/lib/go-1.18/src/runtime/asm_mipsx.s:89 +0x10 goroutine 1 [runnable]: runtime.main() /usr/lib/go-1.18/src/runtime/proc.go:145 runtime.goexit() /usr/lib/go-1.18/src/runtime/asm_mipsx.s:610 +0x4

Process Tree

system is lnxubuntu20

linux_mipsel.elf (PID: 6246, Parent: 6166, MD5: 0d6f61f82cf2f781c6eb0661071d42d9) Arguments: /tmp/linux_mipsel.elf

dash New Fork (PID: 6297, Parent: 4331)

rm (PID: 6297, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.tP9xk7WCAl /tmp/tmp.21BHXWGfK0 /tmp/tmp.8QhWdSJNH5

dash New Fork (PID: 6298, Parent: 4331)

rm (PID: 6298, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.tP9xk7WCAl /tmp/tmp.21BHXWGfK0 /tmp/tmp.8QhWdSJNH5

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
Chaos	Multi-functional malware written in Go, targeting both Linux and Windows, evolved from elf.kaiji.	No Attribution	https://blog.lumen.com/chaos-is-a-go-based-swiss-army-knife-of-malware/ https://www.trendmicro.com/en_us/research/22/l/linux-cryptomining-enhanced-via-chaos-rat-.html	https://malpedia.caad.fkie.fraunhofer.de/details/elf.chaos

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
linux_mipsel.elf	JoeSecurity_ChaosGo	Yara detected Chaos	Joe Security

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• AV Detection
• Networking
• System Summary
• Persistence and Installation Behavior
• Malware Analysis System Evasion
• Stealing of Sensitive Information
• Remote Access Functionality

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: linux_mipsel.elf	Virustotal: Detection: 46%			Perma Link
Source: linux_mipsel.elf	ReversingLabs: Detection: 41%

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: 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: linux_mipsel.elf	String found in binary or memory: http2: Transport conn %p received error from processing frame %v: %vhttp2: Transport received unsolicited DATA frame; closing connectionhttp: message cannot contain multiple Content-Length headers; got %qpadding bytes must all be zeros unless AllowIllegalWrites is enabledreflect: reflect.Value.UnsafePointer on an invalid notinheap pointerhttp2: Transport closing idle conn %p (forSingleUse=%v, maxStream=%v)tls: handshake message of length %d bytes exceeds maximum of %d bytestls: peer doesn't support the certificate custom signature algorithmsbytes.Buffer: UnreadByte: previous operation was not a successful readcannot convert slice with length %y to pointer to array with length %xgot %s for stream %d; expected CONTINUATION following %s for stream %dx509: PKCS#8 wrapping contained private key with unknown algorithm: %vx509: certificate relies on legacy Common Name field, use SANs insteadMozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)Sogou Pic Spider/3.0(+http://www.sogou.com/docs/help/webmasters.htm#07)Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)dynamic table size update MUST occur at the beginning of a header blockssh: no common algorithm for %s; client offered: %v, server offered: %vtls: peer doesn't support any of the certificate's signature algorithmstoo many concurrent operations on a single file or socket (max 1048575)x509: issuer has name constraints but leaf doesn't have a SAN extensionMozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)tls: server's certificate contains an unsupported type of public key: %Ttls: received unexpected handshake message of type %T when waiting for %T91289437fa036b34da55d57af6192768c27bd433fa012169d626d934e0051b24dd67dd3cf49d7cc827bc012d259d7ac226e70829239d7ac226e7082968de60d520eb433722c07fd236f6crypto/elliptic: internal error: Unmarshal rejected a valid point encodingmalformed response from server: malformed non-numeric status pseudo headernet/http: server replied with more than declared Content-Length; truncatedtls: certificate RSA key size too small for supported signature algorithmsUnsolicited response received on idle HTTP channel starting with %q; err=%vtls: internal error: attempted to read record with pending application datatls: failed to send closeNotify alert (but connection was closed anyway): %wtls: server certificate contains incorrect key type for selected ciphersuite((2(5[0-5]\|[0-4]\d))\|[0-1]?\d{1,2})(\.((2(5[0-5]\|[0-4]\d))\|[0-1]?\d{1,2})){3}MapIter.Next called on an iterator that does not have an associated map Valuecrypto/tls: ExportKeyingMaterial is unavailable when renegotiation is enabled115792089210356248762697446949407573529996955224135760342422259061068512044369115792089210356248762697446949407573530086143415290314195533631308867097853951ssh: internal error: algorithmSignerWrapper invoked with non-default algorithmssh: unable to authenticate, attempted methods %v, no supported methods remainx509: signature check attempt
Source: linux_mipsel.elf	String found in binary or memory: http: RoundTripper implementation (%T) returned a nil Response with a nil errortls: either ServerName or InsecureSkipVerify must be specified in the tls.Configx509: invalid signature: parent certificate cannot sign this kind of certificaterefusing to use HTTP_PROXY value in CGI environment; see golang.org/s/cgihttpproxyx509: a root or intermediate certificate is not authorized to sign for this name: (possibly because of %q while trying to verify candidate authority certificate %q)Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)x509: issuer has name constraints but leaf contains unknown or unconstrained name: tls: downgrade attempt detected, possibly due to a MitM attack or a broken middleboxx509: signature algorithm specifies an %s public key, but have public key of type %Treflect.Value.Interface: cannot return value obtained from unexported field or methodx509: failed to parse private key (use ParseECPrivateKey instead for this key format)Mozilla/5.0 (compatible; YoudaoBot/1.0; http://www.youdao.com/help/webmaster/spider/;)reflect: New of type that may not be allocated in heap (possibly undefined cgo C type)x509: a root or intermediate certificate is not authorized for an extended key usage: fxfzUc6gtMGc/i26ld3KydGKy1k7QqyMMyxjbU1Rlk+F9LQxnaTeCHGHsDUpaBeOWDeY6l+2kHlB7EWTLcGwfg==whv+Kf1cEtOXzr+zuvmef2as0WfbUDm8l2LMWBMel10NDnbShg9CsMUt327VJhOTbXLoPYJVTKy8MBPCVwoT8A==x509: failed to parse private key (use ParsePKCS1PrivateKey instead for this key format)x509: failed to parse private key (use ParsePKCS8PrivateKey instead for this key format)Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)http2: server sent GOAWAY and closed the connection; LastStreamID=%v, ErrCode=%v, debug=%qapplication/xml,application/xhtml+xml,text/html;q=0.9, text/plain;q=0.8,image/png,/;q=0.5tls: handshake hash for a client certificate requested after discarding the handshake buffertls: unsupported certificate: private key is ed25519.PrivateKey, expected ed25519.PrivateKey3617de4a96262c6f5d9e98bf9292dc29f8f41dbd289a147ce9da3113b5f0b8c00a60b1ce1d7e819d7a431d7c90ea0e5faa87ca22be8b05378eb1c71ef320ad746e1d3b628ba79b9859f741e082542a385502f25dbf55296c3a545e3872760ab7b3312fa7e23ee7e4988e056be3f82d19181d9c6efe8141120314088f5013875ac656398d8a2ed19d2a85c8edd3ec2aefhttp: RoundTripper implementation (%T) returned a *Response with content length %d but a nil BodyNoClientCertRequestClientCertRequireAnyClientCertVerifyClientCertIfGivenRequireAndVerifyClientCertcipher: the nonce can't have zero length, or the security of the key will be immediately compromised1.0.3<<RMS>> equals www.yahoo.com (Yahoo)

Source: linux_mipsel.elf	String found in binary or memory: http://help.yahoo.com/help/us/ysearch/slurp)x509:
Source: linux_mipsel.elf	String found in binary or memory: http://search.msn.com/msnbot.htm
Source: linux_mipsel.elf	String found in binary or memory: http://www.baidu.com/search/spider.html)
Source: linux_mipsel.elf	String found in binary or memory: http://www.baidu.com/search/spider.html)000102030405060708091011121314151617181920212223242526272829
Source: linux_mipsel.elf	String found in binary or memory: http://www.baidu.com/search/spider.html)Mozilla/5.0
Source: linux_mipsel.elf	String found in binary or memory: http://www.baidu.com/search/spider.html)http2:
Source: linux_mipsel.elf	String found in binary or memory: http://www.entireweb.com/about/search_tech/speedy_spider/)text/html
Source: linux_mipsel.elf	String found in binary or memory: http://www.google.com/mobile/adsbot.html)
Source: linux_mipsel.elf	String found in binary or memory: http://www.haosou.com/help/help_3_2.htmlMozilla/5.0
Source: linux_mipsel.elf	String found in binary or memory: http://www.huaweisymantec.com/cn/IRL/spider)Mozilla/5.0
Source: linux_mipsel.elf	String found in binary or memory: http://www.youdao.com/help/webmaster/spider/;)reflect:
Source: linux_mipsel.elf	String found in binary or memory: http://yandex.com/bots)http:
Source: linux_mipsel.elf	String found in binary or memory: https://search.yahoo.com/search?p=illegal
Source: linux_mipsel.elf	String found in binary or memory: https://www.baidu.com/s?wd=insufficient
Source: linux_mipsel.elf	String found in binary or memory: https://www.so.com/s?q=index

Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 39252
Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 39252 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: mal56.troj.linELF@0/0@0/0

Source: ELF file section

Submission: linux_mipsel.elf

Source: /usr/bin/dash (PID: 6297)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.tP9xk7WCAl /tmp/tmp.21BHXWGfK0 /tmp/tmp.8QhWdSJNH5			Jump to behavior
Source: /usr/bin/dash (PID: 6298)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.tP9xk7WCAl /tmp/tmp.21BHXWGfK0 /tmp/tmp.8QhWdSJNH5			Jump to behavior

Source: /tmp/linux_mipsel.elf (PID: 6246)

Queries kernel information via 'uname':

Jump to behavior

Source: linux_mipsel.elf, 6246.1.00007ffd5e5ca000.00007ffd5e5eb000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-mipsel/tmp/linux_mipsel.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/linux_mipsel.elf
Source: linux_mipsel.elf, 6246.1.000055af3da37000.000055af3dd82000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/mipsel
Source: linux_mipsel.elf, 6246.1.000055af3da37000.000055af3dd82000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/mipsel
Source: linux_mipsel.elf, 6246.1.00007ffd5e5ca000.00007ffd5e5eb000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-mipsel

Stealing of Sensitive Information

Yara detected Chaos

Source: Yara match

File source: linux_mipsel.elf, type: SAMPLE

Remote Access Functionality

Yara detected Chaos

Source: Yara match

File source: linux_mipsel.elf, type: SAMPLE

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

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
linux_mipsel.elf	47%	Virustotal		Browse
linux_mipsel.elf	42%	ReversingLabs	Linux.Trojan.Kaiji

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://www.baidu.com/search/spider.html)	linux_mipsel.elf	false	high
http://search.msn.com/msnbot.htm	linux_mipsel.elf	false	high
http://www.baidu.com/search/spider.html)000102030405060708091011121314151617181920212223242526272829	linux_mipsel.elf	false	high
https://www.so.com/s?q=index	linux_mipsel.elf	false	high
http://help.yahoo.com/help/us/ysearch/slurp)x509:	linux_mipsel.elf	false	high
http://www.google.com/mobile/adsbot.html)	linux_mipsel.elf	false	high
http://www.huaweisymantec.com/cn/IRL/spider)Mozilla/5.0	linux_mipsel.elf	false	high
http://www.baidu.com/search/spider.html)http2:	linux_mipsel.elf	false	high
http://yandex.com/bots)http:	linux_mipsel.elf	false	high
http://www.baidu.com/search/spider.html)Mozilla/5.0	linux_mipsel.elf	false	high
http://www.entireweb.com/about/search_tech/speedy_spider/)text/html	linux_mipsel.elf	false	high
http://www.haosou.com/help/help_3_2.htmlMozilla/5.0	linux_mipsel.elf	false	high
https://www.baidu.com/s?wd=insufficient	linux_mipsel.elf	false	high
http://www.youdao.com/help/webmaster/spider/;)reflect:	linux_mipsel.elf	false	high
https://search.yahoo.com/search?p=illegal	linux_mipsel.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	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	linux_mips64.elf	Get hash	malicious	Chaos	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	boatnet.mips.elf	Get hash	malicious	Mirai	Browse
	boatnet.arm7.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	boatnet.mpsl.elf	Get hash	malicious	Mirai	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	linux_arm7.elf	Get hash	malicious	Chaos	Browse
	linux_mips.elf	Get hash	malicious	Chaos	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	eehah4.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	tftp.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	linux_mips64.elf	Get hash	malicious	Chaos	Browse
	linux_arm5.elf	Get hash	malicious	Chaos	Browse
	na.elf	Get hash	malicious	Prometei	Browse
91.189.91.42	linux_arm7.elf	Get hash	malicious	Chaos	Browse
	linux_mips.elf	Get hash	malicious	Chaos	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	eehah4.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	tftp.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	linux_mips64.elf	Get hash	malicious	Chaos	Browse
	linux_arm5.elf	Get hash	malicious	Chaos	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	linux_arm7.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	linux_mips.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	eehah4.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	tftp.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	linux_mips64.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	linux_arm5.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
CANONICAL-ASGB	linux_arm7.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	linux_mips.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	eehah4.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	tftp.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	linux_mips64.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	linux_arm5.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
INIT7CH	linux_arm7.elf	Get hash	malicious	Chaos	Browse	109.202.202.202
	linux_mips.elf	Get hash	malicious	Chaos	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	eehah4.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	tftp.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	linux_mips64.elf	Get hash	malicious	Chaos	Browse	109.202.202.202
	linux_arm5.elf	Get hash	malicious	Chaos	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
AMAZON-02US	na.elf	Get hash	malicious	Prometei	Browse	54.255.164.76
	eehah4.elf	Get hash	malicious	Unknown	Browse	54.171.230.55
	na.elf	Get hash	malicious	Prometei	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	54.171.230.55
	linux_mips64.elf	Get hash	malicious	Chaos	Browse	34.249.145.219
	linux_arm5.elf	Get hash	malicious	Chaos	Browse	54.171.230.55
	na.elf	Get hash	malicious	Prometei	Browse	54.255.164.76
	46.19.143.26-mips-2025-03-01T06_09_25.elf	Get hash	malicious	Unknown	Browse	54.217.10.153
	na.elf	Get hash	malicious	Prometei	Browse	54.255.164.76
	na.elf	Get hash	malicious	Prometei	Browse	34.249.145.219

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, MIPS, MIPS32 version 1 (SYSV), statically linked, Go BuildID=glC4xsoF8x1XxtAKb_A2/Mz20oUbBWtxO8TeYMv6w/xg4-s9T_SCpz5OIIIPY6/JkgdiA0NCZ4SR8btS7hW, stripped
Entropy (8bit):	5.507778960570006
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	linux_mipsel.elf
File size:	5'898'240 bytes
MD5:	0a726ddab4af1ad1c0370d205d367cb3
SHA1:	7378a0ac31c458985753d3f3b8da1ca460f79043
SHA256:	5e74711ff4d14b247f790792c25b2b39287ca3d2becfe5efe0c964d2ba4c24cd
SHA512:	2829517bf829008e38d7f2b278cee72cf44847ac848bed7b2e2df2fb14f0966f3fbd66345254338c33598e309dc28055731157bfed3de8bfc5a97e414931b35e
SSDEEP:	98304:yC91hAFxvW6WGVqq7g3JDCg76dAuE8iW5ay5mIOX+aaNcc8pNkxXkz8xBs3K4HUd:yC91hAFxvW6WGVqq7g3JDCg76dAuE8iW
TLSH:	7056E704ADC56BA6C06C9B7584EBCE9523B06D044AF12B271664FEDAB8762747F07CCC
File Content Preview:	.ELF....................L...4...4......P4. ...(.........4...4...4...................................d...d............................2..2...............3...4...4.,.".,."...............V...W...W.................Q.td...............................e.......

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	MIPS R3000
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x8c74c
Flags:	0x50001004
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	8
Section Header Offset:	308
Section Header Size:	40
Number of Section Headers:	16
Header String Table Index:	4

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.text	PROGBITS	0x11000	0x1000	0x321a04	0x0	0x6	AX	4
.rodata	PROGBITS	0x340000	0x330000	0xdc023	0x0	0x2	A	32
.gnu.attributes	GNU_ATTRIBUTES	0x0	0x40c030	0x10	0x0	0x0		1
.shstrtab	STRTAB	0x0	0x40c040	0xc4	0x0	0x0		1
.typelink	PROGBITS	0x41c120	0x40c120	0x17bc	0x0	0x2	A	32
.itablink	PROGBITS	0x41d8e0	0x40d8e0	0x4a4	0x0	0x2	A	32
.gosymtab	PROGBITS	0x41dd84	0x40dd84	0x0	0x0	0x2	A	1
.gopclntab	PROGBITS	0x41dda0	0x40dda0	0x14a48c	0x0	0x2	A	32
.go.buildinfo	PROGBITS	0x570000	0x560000	0xe0	0x0	0x3	WA	16
.noptrdata	PROGBITS	0x5700e0	0x5600e0	0x301d8	0x0	0x3	WA	32
.data	PROGBITS	0x5a02c0	0x5902c0	0x81b0	0x0	0x3	WA	32
.bss	NOBITS	0x5a8480	0x598480	0x1347c	0x0	0x3	WA	32
.noptrbss	NOBITS	0x5bb900	0x5ab900	0xe7ec	0x0	0x3	WA	32
.note.go.buildid	NOTE	0x10f9c	0xf9c	0x64	0x0	0x2	A	4
.MIPS.abiflags	MIPS_ABIFLAGS	0x10f84	0xf84	0x18	0x0	0x2	A	8

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
PHDR	0x34	0x10034	0x10034	0x100	0x100	2.3086	0x4	R	0x10000
NOTE	0xf9c	0x10f9c	0x10f9c	0x64	0x64	5.3021	0x4	R	0x4	.note.go.buildid
LOAD	0x0	0x10000	0x10000	0x322a04	0x322a04	5.1624	0x5	R E	0x10000	.text .note.go.buildid .MIPS.abiflags
LOAD	0x330000	0x340000	0x340000	0x22822c	0x22822c	5.5995	0x4	R	0x10000	.rodata .typelink .itablink .gosymtab .gopclntab
LOAD	0x560000	0x570000	0x570000	0x38480	0x5a0ec	5.6719	0x6	RW	0x10000	.go.buildinfo .noptrdata .data .bss .noptrbss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x6	RW	0x4
LOOS+5041580	0x0	0x0	0x0	0x0	0x0	0.0000	0x2a00		0x4
ABIFLAGS	0xf84	0x10f84	0x10f84	0x18	0x18	0.8887	0x4	R	0x8	.MIPS.abiflags

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 20, 2025 23:45:04.480462074 CET	43928	443	192.168.2.23	91.189.91.42
Mar 20, 2025 23:45:10.107903004 CET	42836	443	192.168.2.23	91.189.91.43
Mar 20, 2025 23:45:11.388295889 CET	42516	80	192.168.2.23	109.202.202.202
Mar 20, 2025 23:45:24.493910074 CET	39252	443	192.168.2.23	34.249.145.219
Mar 20, 2025 23:45:24.493943930 CET	443	39252	34.249.145.219	192.168.2.23
Mar 20, 2025 23:45:24.494208097 CET	39252	443	192.168.2.23	34.249.145.219
Mar 20, 2025 23:45:24.495261908 CET	39252	443	192.168.2.23	34.249.145.219
Mar 20, 2025 23:45:24.495275021 CET	443	39252	34.249.145.219	192.168.2.23
Mar 20, 2025 23:45:25.209863901 CET	43928	443	192.168.2.23	91.189.91.42
Mar 20, 2025 23:45:37.496004105 CET	42836	443	192.168.2.23	91.189.91.43
Mar 20, 2025 23:45:41.591461897 CET	42516	80	192.168.2.23	109.202.202.202
Mar 20, 2025 23:46:06.164242029 CET	43928	443	192.168.2.23	91.189.91.42
Mar 20, 2025 23:46:24.486718893 CET	39252	443	192.168.2.23	34.249.145.219
Mar 20, 2025 23:46:24.528353930 CET	443	39252	34.249.145.219	192.168.2.23
Mar 20, 2025 23:47:09.328839064 CET	443	39252	34.249.145.219	192.168.2.23

System Behavior

Analysis Process: linux_mipsel.elf PID: 6246, Parent PID: 6166

General

Start time (UTC):	22:45:03
Start date (UTC):	20/03/2025
Path:	/tmp/linux_mipsel.elf
Arguments:	/tmp/linux_mipsel.elf
File size:	5773336 bytes
MD5 hash:	0d6f61f82cf2f781c6eb0661071d42d9

File Activities

File Opened

File Read

Process Activities

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Analysis Process: dash PID: 6297, Parent PID: 4331

General

Start time (UTC):	22:46:23
Start date (UTC):	20/03/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6297, Parent PID: 4331

General

Start time (UTC):	22:46:23
Start date (UTC):	20/03/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.tP9xk7WCAl /tmp/tmp.21BHXWGfK0 /tmp/tmp.8QhWdSJNH5
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Analysis Process: dash PID: 6298, Parent PID: 4331

General

Start time (UTC):	22:46:23
Start date (UTC):	20/03/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6298, Parent PID: 4331

General

Start time (UTC):	22:46:23
Start date (UTC):	20/03/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.tP9xk7WCAl /tmp/tmp.21BHXWGfK0 /tmp/tmp.8QhWdSJNH5
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 linux_mipsel.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Malware Threat Intel

Yara Signatures

Initial Sample

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Persistence and Installation Behavior

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

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

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

Network Behavior

Network Port Distribution

TCP Packets

System Behavior

Analysis Process: linux_mipsel.elf PID: 6246, Parent PID: 6166

General

File Activities

File Opened

File Read

Process Activities

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Analysis Process: dash PID: 6297, Parent PID: 4331

General

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6297, Parent PID: 4331

General

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Linux Analysis Report
linux_mipsel.elf