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Analysis Report NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Overview

General Information

Sample Name:	NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe
Analysis ID:	385245
MD5:	69273783da83c97ff021e1002243dd8b
SHA1:	c1f879d4c66d53ae682b870f3e9e0e016929e220
SHA256:	81980be7abe0eb985644d9c867fe8ad4820d9d6a2c9538011d67251dd9378170
Infos:
Most interesting Screenshot:

Detection

GuLoader

Score:	96
Range:	0 - 100
Whitelisted:	false
Confidence:	100%

Signatures

Found malware configuration

Multi AV Scanner detection for submitted file

Yara detected GuLoader

C2 URLs / IPs found in malware configuration

Detected RDTSC dummy instruction sequence (likely for instruction hammering)

Executable has a suspicious name (potential lure to open the executable)

Found potential dummy code loops (likely to delay analysis)

Initial sample is a PE file and has a suspicious name

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Tries to detect virtualization through RDTSC time measurements

Yara detected VB6 Downloader Generic

Abnormal high CPU Usage

Contains functionality for execution timing, often used to detect debuggers

Contains functionality for read data from the clipboard

Contains functionality to query CPU information (cpuid)

Contains functionality to read the PEB

Detected potential crypto function

Found large amount of non-executed APIs

PE file contains strange resources

Program does not show much activity (idle)

Queries the volume information (name, serial number etc) of a device

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

Uses 32bit PE files

Uses code obfuscation techniques (call, push, ret)

Classification

Startup

System is w10x64

NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe (PID: 7100 cmdline: 'C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe' MD5: 69273783DA83C97FF021E1002243DD8B)

cleanup

Malware Configuration

Threatname: GuLoader

{"Payload URL": "https://drive.google.com/uc?export=download&id=1vOQNsh0Cmxl5hty4ZPc18pGNKUD5RTVY"}

Yara Overview

Memory Dumps

Source	Rule	Description	Author	Strings
Process Memory Space: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe PID: 7100	JoeSecurity_VB6DownloaderGeneric	Yara detected VB6 Downloader Generic	Joe Security
Process Memory Space: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe PID: 7100	JoeSecurity_GuLoader	Yara detected GuLoader	Joe Security

Sigma Overview

No Sigma rule has matched

Signature Overview

Click to jump to signature section

Show All Signature Results

AV Detection:

Found malware configuration

Show sources

Source: 00000000.00000002.1166657549.0000000002230000.00000040.00000001.sdmp

Malware Configuration Extractor: GuLoader {"Payload URL": "https://drive.google.com/uc?export=download&id=1vOQNsh0Cmxl5hty4ZPc18pGNKUD5RTVY"}

Multi AV Scanner detection for submitted file

Show sources

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Virustotal: Detection: 61%	Perma Link
Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Metadefender: Detection: 32%	Perma Link
Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	ReversingLabs: Detection: 60%

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED

Networking:

C2 URLs / IPs found in malware configuration

Show sources

Source: Malware configuration extractor

URLs: https://drive.google.com/uc?export=download&id=1vOQNsh0Cmxl5hty4ZPc18pGNKUD5RTVY

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Code function: 0_2_0041153C OpenClipboard,

System Summary:

Executable has a suspicious name (potential lure to open the executable)

Show sources

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Static file information: Suspicious name

Initial sample is a PE file and has a suspicious name

Show sources

Source: initial sample

Static PE information: Filename: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Process Stats: CPU usage > 98%

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Code function: 0_2_00406CA0

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe, 00000000.00000000.643666689.000000000041B000.00000002.00020000.sdmp	Binary or memory string: OriginalFilenameStringet3.exe vs NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe
Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Binary or memory string: OriginalFilenameStringet3.exe vs NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Static PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED

Source: classification engine

Classification label: mal96.troj.evad.winEXE@1/0@0/0

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

File created: C:\Users\user\AppData\Local\Temp\~DFC8581C4ED5AF02EC.TMP

Jump to behavior

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Static PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Section loaded: C:\Windows\SysWOW64\msvbvm60.dll

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

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

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Virustotal: Detection: 61%
Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Metadefender: Detection: 32%
Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	ReversingLabs: Detection: 60%

Data Obfuscation:

Yara detected GuLoader

Show sources

Source: Yara match

File source: Process Memory Space: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe PID: 7100, type: MEMORY

Yara detected VB6 Downloader Generic

Show sources

Source: Yara match

File source: Process Memory Space: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe PID: 7100, type: MEMORY

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_0040245C pushfd ; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00408824 pushfd ; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00409083 push ecx; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_0040248C pushfd ; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_004094B3 push ecx; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_0040A949 push ecx; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00408963 pushfd ; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00409501 push ecx; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_0040812A push ecx; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_004089C4 push ecx; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_004051D6 pushfd ; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_0040898C push ecx; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_0040A9A5 push ecx; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00403278 push dword ptr [edi-4B012F33h]; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00408A19 push ecx; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_0040962B push ecx; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00407EE5 push ecx; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_0040A2F1 push ecx; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_004036FA push fs; ret
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00402690 pushfd ; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_0040A2B5 push ecx; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00407F47 push ecx; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00402F67 pushfd ; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00403320 pushfd ; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00408B23 pushad ; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00408B28 push ecx; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_004043D7 pushfd ; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_00408FB3 push ecx; iretd
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_02233AF3 push FFFFFFB9h; retf
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_02234ED0 push eax; ret

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Process information set: NOOPENFILEERRORBOX
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Process information set: NOOPENFILEERRORBOX

Malware Analysis System Evasion:

Detected RDTSC dummy instruction sequence (likely for instruction hammering)

Show sources

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

RDTSC instruction interceptor: First address: 0000000002234171 second address: 0000000002234171 instructions:

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Show sources

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Binary or memory string: C:\PROGRAM FILES\QEMU-GA\QEMU-GA.EXE

Tries to detect virtualization through RDTSC time measurements

Show sources

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	RDTSC instruction interceptor: First address: 0000000002234900 second address: 0000000002234171 instructions: 0x00000000 rdtsc 0x00000002 lfence 0x00000005 shl edx, 20h 0x00000008 or edx, eax 0x0000000a popad 0x0000000b cmp dh, FFFFFF96h 0x0000000e cmp cx, FBFCh 0x00000013 cmp bl, dl 0x00000015 mov eax, 00000539h 0x0000001a mov ecx, dword ptr [ebp+1Ch] 0x0000001d cmp dl, FFFFFFD9h 0x00000020 mov edx, 8802EDACh 0x00000025 call 00007F9D583648CCh 0x0000002a push esi 0x0000002b push edx 0x0000002c jmp 00007F9D583651BDh 0x00000031 pushad 0x00000032 rdtsc
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	RDTSC instruction interceptor: First address: 0000000002234171 second address: 0000000002234171 instructions:
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	RDTSC instruction interceptor: First address: 000000000223474E second address: 000000000223474E instructions: 0x00000000 rdtsc 0x00000002 xor eax, eax 0x00000004 inc eax 0x00000005 cpuid 0x00000007 popad 0x00000008 call 00007F9D5836512Eh 0x0000000d lfence 0x00000010 mov edx, dword ptr [7FFE0014h] 0x00000016 lfence 0x00000019 ret 0x0000001a sub edx, esi 0x0000001c ret 0x0000001d add edi, edx 0x0000001f dec dword ptr [ebp+000000F8h] 0x00000025 cmp dword ptr [ebp+000000F8h], 00000000h 0x0000002c jne 00007F9D5836510Ch 0x0000002e call 00007F9D58365156h 0x00000033 call 00007F9D5836513Eh 0x00000038 lfence 0x0000003b mov edx, dword ptr [7FFE0014h] 0x00000041 lfence 0x00000044 ret 0x00000045 mov esi, edx 0x00000047 pushad 0x00000048 rdtsc

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Code function: 0_2_02234771 rdtsc

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

API coverage: 1.2 %

Source: all processes

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

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Binary or memory string: C:\Program Files\Qemu-ga\qemu-ga.exe

Anti Debugging:

Found potential dummy code loops (likely to delay analysis)

Show sources

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Process Stats: CPU usage > 90% for more than 60s

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Code function: 0_2_02234771 rdtsc

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_02231868 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_022340BB mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_02234523 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_02231530 mov eax, dword ptr fs:[00000030h]
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Code function: 0_2_022325D3 mov eax, dword ptr fs:[00000030h]

Source: all processes

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

Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe, 00000000.00000002.1166538080.0000000000D60000.00000002.00000001.sdmp	Binary or memory string: Program Manager
Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe, 00000000.00000002.1166538080.0000000000D60000.00000002.00000001.sdmp	Binary or memory string: Shell_TrayWnd
Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe, 00000000.00000002.1166538080.0000000000D60000.00000002.00000001.sdmp	Binary or memory string: Progman
Source: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe, 00000000.00000002.1166538080.0000000000D60000.00000002.00000001.sdmp	Binary or memory string: Progmanlock

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Code function: 0_2_02233972 cpuid

Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Queries volume information: C:\ VolumeInformation
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Queries volume information: C:\ VolumeInformation
Source: C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	Queries volume information: C:\ VolumeInformation

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	Windows Management Instrumentation	Path Interception	Process Injection1	Virtualization/Sandbox Evasion11	OS Credential Dumping	Security Software Discovery411	Remote Services	Archive Collected Data1	Exfiltration Over Other Network Medium	Encrypted Channel1	Eavesdrop on Insecure Network Communication	Remotely Track Device Without Authorization	Modify System Partition
Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	Boot or Logon Initialization Scripts	Process Injection1	LSASS Memory	Virtualization/Sandbox Evasion11	Remote Desktop Protocol	Clipboard Data1	Exfiltration Over Bluetooth	Application Layer Protocol1	Exploit SS7 to Redirect Phone Calls/SMS	Remotely Wipe Data Without Authorization	Device Lockout
Domain Accounts	At (Linux)	Logon Script (Windows)	Logon Script (Windows)	Obfuscated Files or Information1	Security Account Manager	Process Discovery1	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)	Binary Padding	NTDS	System Information Discovery221	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
NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	61%	Virustotal		Browse
NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	32%	Metadefender		Browse
NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe	60%	ReversingLabs	Win32.Trojan.Guloader

Dropped Files

No Antivirus matches

Unpacked PE Files

No Antivirus matches

Domains

No Antivirus matches

URLs

No Antivirus matches

Domains and IPs

Contacted Domains

No contacted domains info

Contacted IPs

No contacted IP infos

General Information

Joe Sandbox Version:	31.0.0 Emerald
Analysis ID:	385245
Start date:	12.04.2021
Start time:	08:57:32
Joe Sandbox Product:	CloudBasic
Overall analysis duration:	0h 7m 22s
Hypervisor based Inspection enabled:	false
Report type:	light
Sample file name:	NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.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:	17
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:	mal96.troj.evad.winEXE@1/0@0/0
EGA Information:	Successful, ratio: 100%
HDC Information:	Successful, ratio: 6.4% (good quality ratio 6.4%) Quality average: 55.8% Quality standard deviation: 12%
HCA Information:	Failed
Cookbook Comments:	Adjust boot time Enable AMSI Found application associated with file extension: .exe Override analysis time to 240s for sample files taking high CPU consumption
Warnings:	Show All Exclude process from analysis (whitelisted): BackgroundTransferHost.exe, backgroundTaskHost.exe, svchost.exe, wuapihost.exe

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

No created / dropped files found

Static File Info

General
File type:	PE32 executable (GUI) Intel 80386, for MS Windows
Entropy (8bit):	5.7345833661144345
TrID:	Win32 Executable (generic) a (10002005/4) 99.15% Win32 Executable Microsoft Visual Basic 6 (82127/2) 0.81% Generic Win/DOS Executable (2004/3) 0.02% DOS Executable Generic (2002/1) 0.02% Autodesk FLIC Image File (extensions: flc, fli, cel) (7/3) 0.00%
File name:	NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe
File size:	131072
MD5:	69273783da83c97ff021e1002243dd8b
SHA1:	c1f879d4c66d53ae682b870f3e9e0e016929e220
SHA256:	81980be7abe0eb985644d9c867fe8ad4820d9d6a2c9538011d67251dd9378170
SHA512:	6bf65db5a6798bfe67e935351357d99f9fc531f9a3d94aec4b20b67fed94135d51f948a4f2a3ed7d53e922d5da808ea3a6f18cfc18f1021313ce3420e73f1837
SSDEEP:	1536:P2GouBbBuyXebN6nGZ+yIbpklD0o/WlQgWs6WcpvihGo:+GZBb9nttbpvQ7s8pvihG
File Content Preview:	MZ......................@...............................................!..L.!This program cannot be run in DOS mode....$.......u...1...1...1.......0...~...0.......0...Rich1...........PE..L...-.!M.....................`....................@................

File Icon


Icon Hash:	0ccea09899191898

Static PE Info

General
Entrypoint:	0x4016bc
Entrypoint Section:	.text
Digitally signed:	false
Imagebase:	0x400000
Subsystem:	windows gui
Image File Characteristics:	LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
DLL Characteristics:
Time Stamp:	0x4D21FF2D [Mon Jan 3 16:54:05 2011 UTC]
TLS Callbacks:
CLR (.Net) Version:
OS Version Major:	4
OS Version Minor:	0
File Version Major:	4
File Version Minor:	0
Subsystem Version Major:	4
Subsystem Version Minor:	0
Import Hash:	b99d75676bd131a32dd8593967e4443d

Entrypoint Preview

Instruction
push 00410D34h
call 00007F9D58BCA873h
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
xor byte ptr [eax], al
add byte ptr [eax], al
cmp byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
retn 3C04h
pop ebp
retn 78C8h
dec ebx
xchg eax, ebx
popfd
add byte ptr [edi+3A915898h], ah
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add dword ptr [eax], eax
add byte ptr [eax], al
jo 00007F9D58BCA8A2h
and byte ptr [eax], ah
and byte ptr [eax], ah
push ebx
je 00007F9D58BCA8E7h
outsb
bound edi, dword ptr [eax]
add byte ptr [eax], ah
add byte ptr [eax], al
add byte ptr [eax], al
dec esp
xor dword ptr [eax], eax
sub byte ptr [eax-1Fh], ah
shr dword ptr [ebx], cl
push cs
push ds
dec ebx
inc esp
mov dh, BCh
cwde
adc byte ptr [ebp+5Fh], dh
cwde
out CCh, al
les esp, eax
and eax, 46E3687Bh
movsb
jp 00007F9D58BCA86Bh
mov bl, 32h
call 00007F9DA7F78877h
lodsd
xor ebx, dword ptr [ecx-48EE309Ah]
or al, 00h
stosb
add byte ptr [eax-2Dh], ah
xchg eax, ebx
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
add byte ptr [eax], al
dec esi
cmc
add byte ptr [eax], al
rol dword ptr [eax+eax+00h], 1
add byte ptr [eax+eax], al
dec ebp
outsb
jnc 00007F9D58BCA882h
or eax, 50000601h
outsd
jnc 00007F9D58BCA8F6h
je 00007F9D58BCA8B3h
add byte ptr [ecx], bl
add dword ptr [eax], eax
inc edx
add byte ptr [edx], ah
add byte ptr [ebx], ah
mov es, word ptr [eax+eax+00h]

Data Directories

Name	Virtual Address	Virtual Size	Is in Section
IMAGE_DIRECTORY_ENTRY_EXPORT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_IMPORT	0x18b64	0x28	.text
IMAGE_DIRECTORY_ENTRY_RESOURCE	0x1b000	0x485e	.rsrc
IMAGE_DIRECTORY_ENTRY_EXCEPTION	0x0	0x0
IMAGE_DIRECTORY_ENTRY_SECURITY	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BASERELOC	0x0	0x0
IMAGE_DIRECTORY_ENTRY_DEBUG	0x0	0x0
IMAGE_DIRECTORY_ENTRY_COPYRIGHT	0x0	0x0
IMAGE_DIRECTORY_ENTRY_GLOBALPTR	0x0	0x0
IMAGE_DIRECTORY_ENTRY_TLS	0x0	0x0
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG	0x0	0x0
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT	0x228	0x20
IMAGE_DIRECTORY_ENTRY_IAT	0x1000	0x160	.text
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
.text	0x1000	0x180e8	0x19000	False	0.39478515625	data	6.26229031411	IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
.data	0x1a000	0xaf4	0x1000	False	0.00634765625	data	0.0	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_WRITE, IMAGE_SCN_MEM_READ
.rsrc	0x1b000	0x485e	0x5000	False	0.4140625	data	4.36108868789	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ

Resources

Name	RVA	Size	Type	Language	Country
RT_ICON	0x1d2b6	0x25a8	data
RT_ICON	0x1c20e	0x10a8	data
RT_ICON	0x1b886	0x988	data
RT_ICON	0x1b41e	0x468	GLS_BINARY_LSB_FIRST
RT_GROUP_ICON	0x1b3e0	0x3e	data
RT_VERSION	0x1b180	0x260	data	English	United States

Imports

DLL

Import

MSVBVM60.DLL

_CIcos, _adj_fptan, __vbaFreeVar, __vbaStrVarMove, __vbaFreeVarList, __vbaEnd, _adj_fdiv_m64, __vbaFreeObjList, _adj_fprem1, __vbaSetSystemError, __vbaHresultCheckObj, _adj_fdiv_m32, __vbaAryVar, __vbaAryDestruct, __vbaVarForInit, __vbaObjSet, __vbaOnError, _adj_fdiv_m16i, _adj_fdivr_m16i, __vbaFpR8, _CIsin, __vbaChkstk, EVENT_SINK_AddRef, __vbaStrCmp, DllFunctionCall, _adj_fpatan, __vbaLateIdCallLd, EVENT_SINK_Release, _CIsqrt, EVENT_SINK_QueryInterface, __vbaExceptHandler, _adj_fprem, _adj_fdivr_m64, __vbaFPException, __vbaStrVarVal, _CIlog, __vbaNew2, __vbaR8Str, _adj_fdiv_m32i, _adj_fdivr_m32i, __vbaStrCopy, __vbaI4Str, __vbaFreeStrList, _adj_fdivr_m32, _adj_fdiv_r, __vbaVarTstNe, __vbaI4Var, __vbaVarAdd, __vbaVarDup, __vbaStrToAnsi, __vbaFpI4, _CIatan, __vbaStrMove, __vbaCastObj, __vbaAryCopy, _allmul, __vbaLateIdSt, _CItan, __vbaFPInt, __vbaVarForNext, _CIexp, __vbaFreeObj, __vbaFreeStr

Version Infos

Description	Data
Translation	0x0409 0x04b0
InternalName	Stringet3
FileVersion	3.00
CompanyName	Salty
Comments	Salty
ProductName	Salty
ProductVersion	3.00
FileDescription	Salty
OriginalFilename	Stringet3.exe

Possible Origin

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

Network Behavior

No network behavior found

Code Manipulations

Statistics

System Behavior

Analysis Process: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe PID: 7100 Parent PID: 5944

General

Start time:	08:58:18
Start date:	12/04/2021
Path:	C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe
Wow64 process (32bit):	true
Commandline:	'C:\Users\user\Desktop\NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe'
Imagebase:	0x400000
File size:	131072 bytes
MD5 hash:	69273783DA83C97FF021E1002243DD8B
Has elevated privileges:	true
Has administrator privileges:	true
Programmed in:	Visual Basic
Reputation:	low

Disassembly

Code Analysis

Reset < >

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 employ various means to detect and avoid virtualization and analysis environments. This may include changing behaviors based on the results of checks for the presence of artifacts indicative of a virtual machine environment (VME) or sandbox. If the adversary detects a VME, they may alter their malware to disengage from the victim or conceal the core functions of the implant. They may also search for VME artifacts before dropping secondary or additional payloads. Adversaries may use the information learned from [Virtualization/Sandbox Evasion](https://attack.mitre.org/techniques/T1497) during automated discovery to shape follow-on behaviors.
Tactics:	Defense Evasion, Discovery
Data Sources:	Process command-line parameters, Process monitoring
Platforms:	Linux, 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:	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:	AWS CloudTrail logs, Azure activity logs, File monitoring, Process command-line parameters, Process monitoring, Stackdriver logs
Platforms:	AWS, Azure, Azure AD, GCP, Linux, macOS, Office 365, SaaS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get information about running processes on a system. Information obtained could be used to gain an understanding of common software/applications running on systems within the network. Adversaries may use the information from Process 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:	API monitoring, Process command-line parameters, Process monitoring
Platforms:	Linux, macOS, 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

Description:	An adversary may compress and/or encrypt data that is collected prior to exfiltration. Compressing the data can help to obfuscate the collected data and minimize the amount of data sent over the network. Encryption can be used to hide information that is being exfiltrated from detection or make exfiltration less conspicuous upon inspection by a defender.
Tactics:	Collection
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 collect data stored in the clipboard from users copying information within or between applications.
Tactics:	Collection
Data Sources:	API monitoring
Platforms:	Linux, macOS, 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:	Malware reverse engineering, Netflow/Enclave netflow, Packet capture, Process monitoring, Process use of network, SSL/TLS inspection
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may communicate using 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:	DNS records, Netflow/Enclave netflow, Network protocol analysis, Packet capture, Process monitoring, Process use of network
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Warning!

Analysis Report NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe

Overview

General Information

Detection

Signatures

Classification

Startup

Malware Configuration

Threatname: GuLoader

Yara Overview

Memory Dumps

Sigma Overview

Signature Overview

AV Detection:

Compliance:

Networking:

Key, Mouse, Clipboard, Microphone and Screen Capturing:

System Summary:

Data Obfuscation:

Hooking and other Techniques for Hiding and Protection:

Malware Analysis System Evasion:

Anti Debugging:

HIPS / PFW / Operating System Protection Evasion:

Language, Device and Operating System Detection:

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

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

System Behavior

Analysis Process: NTS_eTaxInvoice#U00a004-08-2021#U00b7pdf.exe PID: 7100 Parent PID: 5944

General

Disassembly

Code Analysis