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Analysis Report javac.exe

Overview

General Information

Sample Name:	javac.exe
Analysis ID:	324352
MD5:	bbf20caee8bfce48f883a65b779dec71
SHA1:	71a8569ce4577016e1bc78eb27daab94ba6d9ce3
SHA256:	03100a76bca9d9ac984cccdf0cf7eef82bb2f1d20751538addc4405e35de4c00
Most interesting Screenshot:

Detection

Xmrig

Score:	84
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Icon mismatch, binary includes an icon from a different legit application in order to fool users

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Yara detected Xmrig cryptocurrency miner

Found strings related to Crypto-Mining

Machine Learning detection for sample

Potential time zone aware malware

Contains functionality to dynamically determine API calls

PE file contains strange resources

Program does not show much activity (idle)

Sample execution stops while process was sleeping (likely an evasion)

Sample file is different than original file name gathered from version info

Yara signature match

Classification

Startup

System is w10x64

javac.exe (PID: 6636 cmdline: 'C:\Users\user\Desktop\javac.exe' MD5: BBF20CAEE8BFCE48F883A65B779DEC71)

conhost.exe (PID: 6644 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)

cleanup

Malware Configuration

No configs have been found

Yara Overview

Memory Dumps

Source	Rule	Description	Author	Strings
00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp	JoeSecurity_Xmrig	Yara detected Xmrig cryptocurrency miner	Joe Security
Process Memory Space: javac.exe PID: 6636	JoeSecurity_Xmrig	Yara detected Xmrig cryptocurrency miner	Joe Security

Unpacked PEs

Source	Rule	Description	Author	Strings
0.2.javac.exe.7ff755a50000.0.unpack	MAL_XMR_Miner_May19_1	Detects Monero Crypto Coin Miner	Florian Roth	0x37ee80:$x1: donate.ssl.xmrig.com 0x37f2f1:$x2: * COMMANDS 'h' hashrate, 'p' pause, 'r' resume 0x379ec8:$s1: [%s] login error code: %d
0.2.javac.exe.7ff755a50000.0.unpack	JoeSecurity_Xmrig	Yara detected Xmrig cryptocurrency miner	Joe Security

Sigma Overview

No Sigma rule has matched

Signature Overview

Click to jump to signature section

Show All Signature Results

AV Detection:

Multi AV Scanner detection for submitted file

Show sources

Source: javac.exe	Virustotal: Detection: 57%	Perma Link
Source: javac.exe	Metadefender: Detection: 16%	Perma Link
Source: javac.exe	ReversingLabs: Detection: 65%

Machine Learning detection for sample

Show sources

Source: javac.exe

Joe Sandbox ML: detected

Bitcoin Miner:

Yara detected Xmrig cryptocurrency miner

Show sources

Source: Yara match	File source: 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: javac.exe PID: 6636, type: MEMORY
Source: Yara match	File source: 0.2.javac.exe.7ff755a50000.0.unpack, type: UNPACKEDPE

Found strings related to Crypto-Mining

Show sources

Source: javac.exe, 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp	String found in binary or memory: stratum+tcp://
Source: javac.exe, 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp	String found in binary or memory: cryptonight/0
Source: javac.exe, 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp	String found in binary or memory: stratum+tcp://
Source: javac.exe, 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp	String found in binary or memory: -o, --url=URL URL of mining server

Source: javac.exe, 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp	String found in binary or memory: https://xmrig.com/docs/algorithms
Source: javac.exe, 00000000.00000002.203688180.0000018E0D84B000.00000004.00000020.sdmp, javac.exe, 00000000.00000002.203707251.0000018E0D86D000.00000004.00000020.sdmp, ConDrv.0.dr	String found in binary or memory: https://xmrig.com/wizard
Source: javac.exe, 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp	String found in binary or memory: https://xmrig.com/wizardSIGTERM

System Summary:

Malicious sample detected (through community Yara rule)

Show sources

Source: 0.2.javac.exe.7ff755a50000.0.unpack, type: UNPACKEDPE

Matched rule: Detects Monero Crypto Coin Miner Author: Florian Roth

Source: javac.exe

Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST

Source: javac.exe, 00000000.00000000.202225027.00007FF7561CB000.00000008.00020000.sdmp	Binary or memory string: OriginalFilenamexmrig.exe0 vs javac.exe
Source: javac.exe	Binary or memory string: OriginalFilenamexmrig.exe0 vs javac.exe

Source: 0.2.javac.exe.7ff755a50000.0.unpack, type: UNPACKEDPE

Matched rule: MAL_XMR_Miner_May19_1 date = 2019-05-31, author = Florian Roth, description = Detects Monero Crypto Coin Miner, reference = https://www.guardicore.com/2019/05/nansh0u-campaign-hackers-arsenal-grows-stronger/, score = d6df423efb576f167bc28b3c08d10c397007ba323a0de92d1e504a3f490752fc

Source: classification engine

Classification label: mal84.evad.mine.winEXE@2/1@0/0

Source: C:\Windows\System32\conhost.exe

Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:6644:120:WilError_01

Source: C:\Users\user\Desktop\javac.exe

Key opened: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers

Jump to behavior

Source: javac.exe	Virustotal: Detection: 57%
Source: javac.exe	Metadefender: Detection: 16%
Source: javac.exe	ReversingLabs: Detection: 65%

Source: javac.exe	String found in binary or memory: set-addPolicy
Source: javac.exe	String found in binary or memory: id-cmc-addExtensions

Source: unknown	Process created: C:\Users\user\Desktop\javac.exe 'C:\Users\user\Desktop\javac.exe'
Source: unknown	Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1

Source: javac.exe

Static PE information: Image base 0x140000000 > 0x60000000

Source: javac.exe

Static file information: File size 1778688 > 1048576

Source: javac.exe

Static PE information: Raw size of UPX1 is bigger than: 0x100000 < 0x187800

Source: javac.exe

Static PE information: TERMINAL_SERVER_AWARE, DYNAMIC_BASE, NX_COMPAT, HIGH_ENTROPY_VA

Source: C:\Users\user\Desktop\javac.exe

Code function: 0_2_00007FF7561CA330 LoadLibraryA,GetProcAddressForCaller,ExitProcess,VirtualProtect,VirtualProtect,VirtualProtect,

0_2_00007FF7561CA330

Source: initial sample	Static PE information: section name: UPX0
Source: initial sample	Static PE information: section name: UPX1

Hooking and other Techniques for Hiding and Protection:

Icon mismatch, binary includes an icon from a different legit application in order to fool users

Show sources

Source: initial sample

Icon embedded in binary file: icon matches a legit application icon: icon1488.png

Malware Analysis System Evasion:

Potential time zone aware malware

Show sources

Source: C:\Users\user\Desktop\javac.exe

System information queried: CurrentTimeZoneInformation

Jump to behavior

Source: all processes

Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

Source: C:\Windows\System32\conhost.exe

Last function: Thread delayed

Source: C:\Users\user\Desktop\javac.exe

API call chain: ExitProcess graph end node

graph_0-91

Source: C:\Users\user\Desktop\javac.exe

Code function: 0_2_00007FF7561CA330 LoadLibraryA,GetProcAddressForCaller,ExitProcess,VirtualProtect,VirtualProtect,VirtualProtect,

0_2_00007FF7561CA330

Source: all processes

Thread injection, dropped files, key value created, disk infection and DNS query: no activity detected

Mitre Att&ck Matrix

Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Exfiltration	Command and Control	Network Effects	Remote Service Effects	Impact
Valid Accounts	Command and Scripting Interpreter2	Path Interception	Process Injection1	Masquerading1	OS Credential Dumping	System Time Discovery1	Remote Services	Data from Local System	Exfiltration Over Other Network Medium	Data Obfuscation	Eavesdrop on Insecure Network Communication	Remotely Track Device Without Authorization	Modify System Partition
Default Accounts	Native API1	Boot or Logon Initialization Scripts	Boot or Logon Initialization Scripts	Software Packing1	LSASS Memory	System Information Discovery1	Remote Desktop Protocol	Data from Removable Media	Exfiltration Over Bluetooth	Junk Data	Exploit SS7 to Redirect Phone Calls/SMS	Remotely Wipe Data Without Authorization	Device Lockout
Domain Accounts	At (Linux)	Logon Script (Windows)	Logon Script (Windows)	Process Injection1	Security Account Manager	Query Registry	SMB/Windows Admin Shares	Data from Network Shared Drive	Automated Exfiltration	Steganography	Exploit SS7 to Track Device Location	Obtain Device Cloud Backups	Delete Device Data
Local Accounts	At (Windows)	Logon Script (Mac)	Logon Script (Mac)	Obfuscated Files or Information1	NTDS	System Network Configuration Discovery	Distributed Component Object Model	Input Capture	Scheduled Transfer	Protocol Impersonation	SIM Card Swap		Carrier Billing Fraud

Behavior Graph

Hide Legend

Legend:

Process
Signature
Created File
DNS/IP Info
Is Dropped
Is Windows Process
Number of created Registry Values
Number of created Files
Visual Basic
Delphi
Java
.Net C# or VB.NET
C, C++ or other language
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
javac.exe	58%	Virustotal		Browse
javac.exe	22%	Metadefender		Browse
javac.exe	66%	ReversingLabs	Win64.Trojan.CoinMiner
javac.exe	100%	Joe Sandbox ML

Dropped Files

No Antivirus matches

Unpacked PE Files

No Antivirus matches

Domains

No Antivirus matches

URLs

Source	Detection	Scanner	Label	Link
https://xmrig.com/wizardSIGTERM	0%	Avira URL Cloud	safe
https://xmrig.com/wizard	0%	Virustotal		Browse
https://xmrig.com/wizard	0%	Avira URL Cloud	safe
https://xmrig.com/docs/algorithms	0%	Virustotal		Browse
https://xmrig.com/docs/algorithms	0%	Avira URL Cloud	safe

Domains and IPs

Contacted Domains

No contacted domains info

URLs from Memory and Binaries

Name	Source	Malicious	Antivirus Detection	Reputation
https://xmrig.com/wizardSIGTERM	javac.exe, 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp	false	Avira URL Cloud: safe	unknown
https://xmrig.com/wizard	javac.exe, 00000000.00000002.203688180.0000018E0D84B000.00000004.00000020.sdmp, javac.exe, 00000000.00000002.203707251.0000018E0D86D000.00000004.00000020.sdmp, ConDrv.0.dr	false	0%, Virustotal, Browse Avira URL Cloud: safe	unknown
https://xmrig.com/docs/algorithms	javac.exe, 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp	false	0%, Virustotal, Browse Avira URL Cloud: safe	unknown

Contacted IPs

No contacted IP infos

General Information

Joe Sandbox Version:	31.0.0 Red Diamond
Analysis ID:	324352
Start date:	29.11.2020
Start time:	13:49:28
Joe Sandbox Product:	CloudBasic
Overall analysis duration:	0h 2m 11s
Hypervisor based Inspection enabled:	false
Report type:	full
Sample file name:	javac.exe
Cookbook file name:	default.jbs
Analysis system description:	Windows 10 64 bit v1803 with Office Professional Plus 2016, Chrome 85, IE 11, Adobe Reader DC 19, Java 8 Update 211
Number of analysed new started processes analysed:	2
Number of new started drivers analysed:	0
Number of existing processes analysed:	0
Number of existing drivers analysed:	0
Number of injected processes analysed:	0
Technologies:	HCA enabled EGA enabled HDC enabled AMSI enabled
Analysis Mode:	default
Analysis stop reason:	Timeout
Detection:	MAL
Classification:	mal84.evad.mine.winEXE@2/1@0/0
EGA Information:	Successful, ratio: 100%
HDC Information:	Successful, ratio: 100% (good quality ratio 25%) Quality average: 14.5% Quality standard deviation: 25.1%
HCA Information:	Failed
Cookbook Comments:	Adjust boot time Enable AMSI Found application associated with file extension: .exe Stop behavior analysis, all processes terminated

Simulations

Behavior and APIs

No simulations

Joe Sandbox View / Context

IPs

No context

Domains

No context

ASN

No context

JA3 Fingerprints

No context

Dropped Files

No context

Created / dropped Files

\Device\ConDrv Download File
Process:	C:\Users\user\Desktop\javac.exe
File Type:	ASCII text, with CRLF, CR line terminators
Category:	dropped
Size (bytes):	168
Entropy (8bit):	5.252968524433859
Encrypted:	false
SSDEEP:	3:oVXVpxFBoXbTTOWXp5vGKLQCSKzcovo9VpxFBoW+pEJAFd8CQIMQDKeBJrXMXMIY:o9GnCWXpFG25zZvy4g6QIR/BJrXMnGTJ
MD5:	D581D2AA3DBA6FBE81A0145388397820
SHA1:	EE1778795109B01B46622B8E75E6A5C634B9F464
SHA-256:	A964F0660EA9448E758EBA4592569ACF43BADCF9E03FCD52FFE11CA41E4F138E
SHA-512:	EAD5E6CC543F284A0FF4297D9221A180718E2C37EE47E093D500EE7F373DC53E878CFCBFF6C5F4C64018EB96232A0453D0BC437EEAD839B3A41ACA776212D1B0
Malicious:	false
Reputation:	low
Preview:	[2020-11-29 13:50:15.943] unable to open "C:\Users\user\Desktop\config.json"....[2020-11-29 13:50:15.946] no valid configuration found, try https://xmrig.com/wizard...

Static File Info

General
File type:	PE32+ executable (console) x86-64, for MS Windows
Entropy (8bit):	7.822537418293464
TrID:	Win64 Executable Console (202006/5) 81.26% UPX compressed Win32 Executable (30571/9) 12.30% Win64 Executable (generic) (12005/4) 4.83% Generic Win/DOS Executable (2004/3) 0.81% DOS Executable Generic (2002/1) 0.81%
File name:	javac.exe
File size:	1778688
MD5:	bbf20caee8bfce48f883a65b779dec71
SHA1:	71a8569ce4577016e1bc78eb27daab94ba6d9ce3
SHA256:	03100a76bca9d9ac984cccdf0cf7eef82bb2f1d20751538addc4405e35de4c00
SHA512:	6dc63993fb76fd526a86dd3d20516ab0f403d53e05057857ae9c93ff6c3320439becb40b3245e31c566d762df1a02e3fce515a1d813699b8338a3e7884a16d3d
SSDEEP:	24576:F0TMMpBJ1SFrJx/XIiJJVBfe0hsCI6ZEdNnsnCAjgysZyyIvbHY5V018c:FyMwBJcfTJznsCdErnFAjjyIvbHT8
File Content Preview:	MZ......................@...................................(...........!..L.!This program cannot be run in DOS mode....$............g...g...g.......g.......g......9g..m....g.......g.......g......gg..0....g.......g...g...f..v....e..0...%g..0....g..0....g.

File Icon


Icon Hash:	1080888c8c828010

Static PE Info

General
Entrypoint:	0x14077a2b0
Entrypoint Section:	UPX1
Digitally signed:	false
Imagebase:	0x140000000
Subsystem:	windows cui
Image File Characteristics:	EXECUTABLE_IMAGE, LARGE_ADDRESS_AWARE
DLL Characteristics:	TERMINAL_SERVER_AWARE, DYNAMIC_BASE, NX_COMPAT, HIGH_ENTROPY_VA
Time Stamp:	0x5ED9180E [Thu Jun 4 15:49:34 2020 UTC]
TLS Callbacks:	0x4077a561, 0x1
CLR (.Net) Version:
OS Version Major:	6
OS Version Minor:	0
File Version Major:	6
File Version Minor:	0
Subsystem Version Major:	6
Subsystem Version Minor:	0
Import Hash:	49f1a89d440efc2bee91781377805550

Entrypoint Preview

Instruction
push ebx
push esi
push edi
push ebp
dec eax
lea esi, dword ptr [FFE78D45h]
dec eax
lea edi, dword ptr [esi-005F2000h]
dec eax
lea eax, dword ptr [edi+00683648h]
push dword ptr [eax]
mov dword ptr [eax], D412B057h
push eax
push edi
xor ebx, ebx
xor ecx, ecx
dec eax
or ebp, FFFFFFFFh
call 00007FF5508FB795h
add ebx, ebx
je 00007FF5508FB744h
rep ret
mov ebx, dword ptr [esi]
dec eax
sub esi, FFFFFFFCh
adc ebx, ebx
mov dl, byte ptr [esi]
rep ret
dec eax
lea eax, dword ptr [edi+ebp]
cmp ecx, 05h
mov dl, byte ptr [eax]
jbe 00007FF5508FB763h
dec eax
cmp ebp, FFFFFFFCh
jnbe 00007FF5508FB75Dh
sub ecx, 04h
mov edx, dword ptr [eax]
dec eax
add eax, 04h
sub ecx, 04h
mov dword ptr [edi], edx
dec eax
lea edi, dword ptr [edi+04h]
jnc 00007FF5508FB731h
add ecx, 04h
mov dl, byte ptr [eax]
je 00007FF5508FB752h
dec eax
inc eax
mov byte ptr [edi], dl
sub ecx, 01h
mov dl, byte ptr [eax]
dec eax
lea edi, dword ptr [edi+01h]
jne 00007FF5508FB732h
rep ret
cld
inc ecx
pop ebx
jmp 00007FF5508FB74Ah
dec eax
inc esi
mov byte ptr [edi], dl
dec eax
inc edi
mov dl, byte ptr [esi]
add ebx, ebx
jne 00007FF5508FB74Ch
mov ebx, dword ptr [esi]
dec eax
sub esi, FFFFFFFCh
adc ebx, ebx
mov dl, byte ptr [esi]
jc 00007FF5508FB728h
lea eax, dword ptr [ecx+01h]
jmp 00007FF5508FB749h
dec eax
inc ecx
call ebx
adc eax, eax
inc ecx
call ebx
adc eax, eax
add ebx, ebx
jne 00007FF5508FB74Ch
mov ebx, dword ptr [esi]
dec eax
sub esi, FFFFFFFCh
adc ebx, ebx
mov dl, byte ptr [esi]
jnc 00007FF5508FB726h
sub eax, 03h
jc 00007FF5508FB75Bh
shl eax, 08h

Data Directories

Name	Virtual Address	Virtual Size	Is in Section
IMAGE_DIRECTORY_ENTRY_EXPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IMPORT	0x7a536c	0x2e0	.rsrc
IMAGE_DIRECTORY_ENTRY_RESOURCE	0x77b000	0x2a36c	.rsrc
IMAGE_DIRECTORY_ENTRY_EXCEPTION	0x71a000	0x1e558	UPX1
IMAGE_DIRECTORY_ENTRY_SECURITY	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BASERELOC	0x7a564c	0x20	.rsrc
IMAGE_DIRECTORY_ENTRY_DEBUG	0x0	0x0
IMAGE_DIRECTORY_ENTRY_COPYRIGHT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_GLOBALPTR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_TLS	0x77a588	0x28	UPX1
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG	0x77a5e8	0x130	UPX1
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IAT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_RESERVED	0x0	0x0

Sections

Name	Virtual Address	Virtual Size	Raw Size	Xored PE	ZLIB Complexity	File Type	Entropy	Characteristics
UPX0	0x1000	0x5f2000	0x0	unknown	unknown	unknown	unknown	IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_WRITE, IMAGE_SCN_CNT_UNINITIALIZED_DATA, IMAGE_SCN_MEM_READ
UPX1	0x5f3000	0x188000	0x187800	False	0.982420627794	data	7.93362082097	IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_WRITE, IMAGE_SCN_MEM_READ
.rsrc	0x77b000	0x2b000	0x2a800	False	0.144870174632	data	4.51391620298	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_WRITE, IMAGE_SCN_MEM_READ

Resources

Name	RVA	Size	Type	Language	Country
RT_ICON	0x77b2b4	0x242e	PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced	English	United States
RT_ICON	0x77d6e8	0x10828	dBase IV DBT, blocks size 0, block length 2048, next free block index 40, next free block 0, next used block 0	English	United States
RT_ICON	0x78df14	0x94a8	data	English	United States
RT_ICON	0x7973c0	0x5488	data	English	United States
RT_ICON	0x79c84c	0x4228	dBase IV DBT of \200.DBF, blocks size 0, block length 16896, next free block index 40, next free block 4294967295, next used block 4294967183	English	United States
RT_ICON	0x7a0a78	0x25a8	data	English	United States
RT_ICON	0x7a3024	0x10a8	data	English	United States
RT_ICON	0x7a40d0	0x988	data	English	United States
RT_ICON	0x7a4a5c	0x468	GLS_BINARY_LSB_FIRST	English	United States
RT_GROUP_ICON	0x7a4ec8	0x84	data	English	United States
RT_VERSION	0x7a4f50	0x298	data	English	United States
RT_MANIFEST	0x7a51ec	0x17d	XML 1.0 document text	English	United States

Imports

DLL	Import
ADVAPI32.dll	LsaClose
bcrypt.dll	BCryptGenRandom
CRYPT32.dll	CertOpenStore
IPHLPAPI.DLL	GetAdaptersAddresses
KERNEL32.DLL	LoadLibraryA, ExitProcess, GetProcAddress, VirtualProtect
PSAPI.DLL	GetProcessMemoryInfo
SHELL32.dll	SHGetSpecialFolderPathA
USER32.dll	ShowWindow
USERENV.dll	GetUserProfileDirectoryW
WS2_32.dll	send

Version Infos

Description	Data
LegalCopyright	Copyright (C) 2016-2020 microsoft.com
FileVersion	5.10.0
CompanyName	www.microsoft.com
ProductName	svchost
ProductVersion	5.10.0
FileDescription	svchost
OriginalFilename	xmrig.exe
Translation	0x0000 0x04b0

Possible Origin

Language of compilation system	Country where language is spoken	Map
English	United States

Network Behavior

No network behavior found

Code Manipulations

Statistics

CPU Usage

Click to jump to process

Memory Usage

Click to jump to process

Behavior

Click to jump to process

System Behavior

Analysis Process: javac.exe PID: 6636 Parent PID: 5744

General

Start time:	13:50:15
Start date:	29/11/2020
Path:	C:\Users\user\Desktop\javac.exe
Wow64 process (32bit):	false
Commandline:	'C:\Users\user\Desktop\javac.exe'
Imagebase:	0x7ff755a50000
File size:	1778688 bytes
MD5 hash:	BBF20CAEE8BFCE48F883A65B779DEC71
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Yara matches:	Rule: JoeSecurity_Xmrig, Description: Yara detected Xmrig cryptocurrency miner, Source: 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp, Author: Joe Security
Reputation:	low

Chronological Activities

Analysis Process: conhost.exe PID: 6644 Parent PID: 6636

General

Start time:	13:50:15
Start date:	29/11/2020
Path:	C:\Windows\System32\conhost.exe
Wow64 process (32bit):	false
Commandline:	C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Imagebase:	0x7ff6b2800000
File size:	625664 bytes
MD5 hash:	EA777DEEA782E8B4D7C7C33BBF8A4496
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	C, C++ or other language
Reputation:	high

Chronological Activities

Disassembly

Code Analysis

Reset < >

Analysis Process: javac.exe PID: 6636 Parent PID: 5744 javac.exeCOMMON

Execution Graph

Execution Coverage:	56.2%
Dynamic/Decrypted Code Coverage:	0%
Signature Coverage:	87.5%
Total number of Nodes:	8
Total number of Limit Nodes:	1

Callgraph

Executed
Not Executed
Opacity -> Relevance
Disassembly available

Executed Functions

Function 00007FF7561CA330, Relevance: 6.2, APIs: 4, Instructions: 209
memorylibraryCOMMON

Download Yara Rule

Control-flow Graph

Executed
Not Executed

APIs

LoadLibraryA.KERNEL32 ref: 00007FF7561CA45A
GetProcAddressForCaller.KERNELBASE ref: 00007FF7561CA484
VirtualProtect.KERNELBASE(?,?,?,00000000), ref: 00007FF7561CA509
VirtualProtect.KERNELBASE ref: 00007FF7561CA527

Memory Dump Source

Source File: 00000000.00000002.204391070.00007FF7561C4000.00000040.00020000.sdmp, Offset: 00007FF755A50000, based on PE: true

Associated: 00000000.00000002.203723249.00007FF755A50000.00000002.00020000.sdmp Download File
Associated: 00000000.00000002.203735977.00007FF755A51000.00000040.00020000.sdmp Download File
Associated: 00000000.00000002.204294090.00007FF755E01000.00000040.00020000.sdmp Download File
Associated: 00000000.00000002.204347839.00007FF7560D3000.00000040.00020000.sdmp Download File
Associated: 00000000.00000002.204361683.00007FF756169000.00000040.00020000.sdmp Download File
Associated: 00000000.00000002.204399936.00007FF7561CB000.00000004.00020000.sdmp Download File

Joe Sandbox IDA Plugin

Snapshot File: hcaresult_0_2_7ff755a50000_javac.jbxd

Yara matches

Similarity

API ID: ProtectVirtual$AddressCallerLibraryLoadProc
String ID:
API String ID: 1941872368-0
Opcode ID: 997fbb60492c79a980544ea157afba3b62fbea148e883885f81262678e6985c6
Instruction ID: c508f0d37db0a8613264e88226d2394c78a2d8412fc64ddf708087385d8e0fe5
Opcode Fuzzy Hash: 997fbb60492c79a980544ea157afba3b62fbea148e883885f81262678e6985c6
Instruction Fuzzy Hash: 2B610722F6915245FF23ABA4BC982BEE6519B117B4F8C4331C7BD463C5EE5CA8568330

Uniqueness

Uniqueness Score: -1.00%

Non-executed Functions

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:	PowerShell logs, Process command-line parameters, Process monitoring, Windows event logs
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may directly interact with the native OS application programming interface (API) to execute behaviors. Native APIs provide a controlled means of calling low-level OS services within the kernel, such as those involving hardware/devices, memory, and processes.These native APIs are leveraged by the OS during system boot (when other system components are not yet initialized) as well as carrying out tasks and requests during routine operations.
Tactics:	Execution
Data Sources:	API monitoring, Loaded DLLs, Process monitoring, System calls
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may inject code into processes in order to evade process-based defenses as well as possibly elevate privileges. Process injection is a method of executing arbitrary code in the address space of a separate live process. Running code in the context of another process may allow access to the process's memory, system/network resources, and possibly elevated privileges. Execution via process injection may also evade detection from security products since the execution is masked under a legitimate process.
Tactics:	Defense Evasion, Privilege Escalation
Data Sources:	API monitoring, DLL monitoring, File monitoring, Named Pipes, Process monitoring
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to manipulate features of their artifacts to make them appear legitimate or benign to users and/or security tools. Masquerading occurs when the name or location of an object, legitimate or malicious, is manipulated or abused for the sake of evading defenses and observation. This may include manipulating file metadata, tricking users into misidentifying the file type, and giving legitimate task or service names.
Tactics:	Defense Evasion
Data Sources:	Binary file metadata, File monitoring, Process command-line parameters, Process monitoring
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may perform software packing or virtual machine software protection to conceal their code. Software packing is a method of compressing or encrypting an executable. Packing an executable changes the file signature in an attempt to avoid signature-based detection. Most decompression techniques decompress the executable code in memory. Virtual machine software protection translates an executable's original code into a special format that only a special virtual machine can run. A virtual machine is then called to run this code.
Tactics:	Defense Evasion
Data Sources:	Binary file metadata
Platforms:	macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. This is common behavior that can be used across different platforms and the network to evade defenses.
Tactics:	Defense Evasion
Data Sources:	Binary file metadata, Email gateway, Environment variable, File monitoring, Malware reverse engineering, Network intrusion detection system, Network protocol analysis, Process command-line parameters, Process monitoring, Process use of network, SSL/TLS inspection, Windows event logs
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	An adversary may gather the system time and/or time zone from a local or remote system. The system time is set and stored by the Windows Time Service within a domain to maintain time synchronization between systems and services in an enterprise network.
Tactics:	Discovery
Data Sources:	API monitoring, Process command-line parameters, Process monitoring
Platforms:	Windows
Url:	Open detailed description by Mitre

Description:	An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture. Adversaries may use the information from System Information 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:	AWS CloudTrail logs, Azure activity logs, Process command-line parameters, Process monitoring, Stackdriver logs
Platforms:	AWS, Azure, GCP, Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Warning!

Analysis Report javac.exe

Overview

General Information

Detection

Signatures

Classification

Startup

Malware Configuration

Yara Overview

Memory Dumps

Unpacked PEs

Sigma Overview

Signature Overview

AV Detection:

Bitcoin Miner:

Networking:

System Summary:

Data Obfuscation:

Hooking and other Techniques for Hiding and Protection:

Malware Analysis System Evasion:

Anti Debugging:

Mitre Att&ck Matrix

Behavior Graph

Screenshots

Thumbnails

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Unpacked PE Files

Domains

URLs

Domains and IPs

Contacted Domains

URLs from Memory and Binaries

Contacted IPs

General Information

Simulations

Behavior and APIs

Joe Sandbox View / Context

IPs

Domains

ASN

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

File Icon

Static PE Info

General

Entrypoint Preview

Data Directories

Sections

Resources

Imports

Version Infos

Possible Origin

Network Behavior

Code Manipulations

Statistics

CPU Usage

Memory Usage

Behavior

System Behavior

Analysis Process: javac.exe PID: 6636 Parent PID: 5744

General

Chronological Activities

Analysis Process: conhost.exe PID: 6644 Parent PID: 6636

General

Chronological Activities

Disassembly

Code Analysis

Analysis Process: javac.exe PID: 6636 Parent PID: 5744 javac.exeCOMMON

Function 00007FF7561CA330, Relevance: 6.2, APIs: 4, Instructions: 209
memorylibraryCOMMON