Malware analysis WerFault.exe Malicious activity | ANY.RUN

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File name:	WerFault.exe
Full analysis:	https://app.any.run/tasks/acc54bce-8925-4751-a487-678a4d5cc8d5
Verdict:	Malicious activity
Threats:	Quasar is a very popular RAT in the world thanks to its code being available in open-source. This malware can be used to control the victim’s computer remotely. Remote access trojans (RATs) are a type of malware that enables attackers to establish complete to partial control over infected computers. Such malicious programs often have a modular design, offering a wide range of functionalities for conducting illicit activities on compromised systems. Some of the most common features of RATs include access to the users’ data, webcam, and keystrokes. This malware is often distributed through phishing emails and links. Trojans are a group of malicious programs distinguished by their ability to masquerade as benign software. Depending on their type, trojans possess a variety of capabilities, ranging from maintaining full remote control over the victim’s machine to stealing data and files, as well as dropping other malware. At the same time, the main functionality of each trojan family can differ significantly depending on its type. The most common trojan infection chain starts with a phishing email. Malware Trends Tracker >>>
Analysis date:	February 25, 2019, 13:56:21
OS:	Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:	rat quasar evasion trojan
Indicators:
MIME:	application/x-dosexec
File info:	PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
MD5:	540E1B4C98187E72B3A8ED26B748E8F2
SHA1:	0A147021C96B94014CB5235C5E58657C6376F904
SHA256:	4BEBEF84FF3459C67447F2F81DC0699C53C37D45F4F19B91443FD8A7F40416F9
SSDEEP:	6144:wbSiPqU23zkG13+/RHT/akvVb6mHT5yPD5Ql4yJC:qoU2Yvwmz0Dql4aC

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.

Launch configuration

Task duration:: 60 seconds
Heavy Evasion option:: off
Network geolocation:: off
Additional time used:: none
MITM proxy:: off
Privacy:: Public submission
Fakenet option:: off
Route via Tor:: off
Autoconfirmation of UAC:: on
Network:: on

Software preset

Internet Explorer 8.0.7601.17514 undefined
Adobe Acrobat Reader DC MUI (15.023.20070)
Adobe Flash Player 26 ActiveX (26.0.0.131)
Adobe Flash Player 26 NPAPI (26.0.0.131)
Adobe Flash Player 26 PPAPI (26.0.0.131)
Adobe Refresh Manager (1.8.0)
CCleaner (5.35)
FileZilla Client 3.36.0 (3.36.0)
Google Chrome (68.0.3440.106)
Google Update Helper (1.3.33.17)
Java 8 Update 92 (8.0.920.14)
Java Auto Updater (2.8.92.14)
Microsoft .NET Framework 4.6.1 (4.6.01055)
Microsoft Office Access MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Access Setup Metadata MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Excel MUI (English) 2010 (14.0.6029.1000)
Microsoft Office OneNote MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Outlook MUI (English) 2010 (14.0.6029.1000)
Microsoft Office PowerPoint MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Professional 2010 (14.0.6029.1000)
Microsoft Office Proof (English) 2010 (14.0.6029.1000)
Microsoft Office Proof (French) 2010 (14.0.6029.1000)
Microsoft Office Proof (Spanish) 2010 (14.0.6029.1000)
Microsoft Office Proofing (English) 2010 (14.0.6029.1000)
Microsoft Office Publisher MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Shared MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Shared Setup Metadata MUI (English) 2010 (14.0.6029.1000)
Microsoft Office Single Image 2010 (14.0.6029.1000)
Microsoft Office Word MUI (English) 2010 (14.0.6029.1000)
Microsoft Visual C++ 2008 Redistributable - x86 9.0.30729.6161 (9.0.30729.6161)
Microsoft Visual C++ 2010 x86 Redistributable - 10.0.40219 (10.0.40219)
Microsoft Visual C++ 2013 Redistributable (x86) - 12.0.30501 (12.0.30501.0)
Microsoft Visual C++ 2013 x86 Additional Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2013 x86 Minimum Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2017 Redistributable (x86) - 14.15.26706 (14.15.26706.0)
Microsoft Visual C++ 2017 x86 Additional Runtime - 14.15.26706 (14.15.26706)
Microsoft Visual C++ 2017 x86 Minimum Runtime - 14.15.26706 (14.15.26706)
Mozilla Firefox 61.0.2 (x86 en-US) (61.0.2)
Notepad++ (32-bit x86) (7.5.1)
Opera 12.15 (12.15.1748)
Skype version 8.29 (8.29)
VLC media player (2.2.6)
WinRAR 5.60 (32-bit) (5.60.0)

Hotfixes

Client LanguagePack Package
Client Refresh LanguagePack Package
CodecPack Basic Package
Foundation Package
IE Troubleshooters Package
InternetExplorer Optional Package
KB2534111
KB2999226
KB976902
LocalPack AU Package
LocalPack CA Package
LocalPack GB Package
LocalPack US Package
LocalPack ZA Package
ProfessionalEdition
UltimateEdition

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MALICIOUS
- Drops/Copies Quasar RAT executable
  - WerFault.exe (PID: 3096)
- Changes the autorun value in the registry
  - WerFault.exe (PID: 3128)
  - WerFault.exe (PID: 3096)
- QUASAR was detected
  - WerFault.exe (PID: 3096)
  - WerFault.exe (PID: 3128)
SUSPICIOUS
- Checks for external IP
  - WerFault.exe (PID: 3096)
  - WerFault.exe (PID: 3128)
- Creates files in the user directory
  - WerFault.exe (PID: 3096)
  - WerFault.exe (PID: 3128)
- Executable content was dropped or overwritten
  - WerFault.exe (PID: 3096)
- Starts itself from another location
  - WerFault.exe (PID: 3096)
- Connects to unusual port
  - WerFault.exe (PID: 3128)
INFO
No info indicators.

Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report

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No Malware configuration.

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TRiD

.exe	\|	Generic CIL Executable (.NET, Mono, etc.) (56.7)
.exe	\|	Win64 Executable (generic) (21.3)
.scr	\|	Windows screen saver (10.1)
.dll	\|	Win32 Dynamic Link Library (generic) (5)
.exe	\|	Win32 Executable (generic) (3.4)

EXIF

EXE

MachineType:	Intel 386 or later, and compatibles
TimeStamp:	2019:02:20 18:29:42+01:00
PEType:	PE32
LinkerVersion:	8
CodeSize:	352768
InitializedDataSize:	3072
UninitializedDataSize:	-
EntryPoint:	0x581de
OSVersion:	4
ImageVersion:	-
SubsystemVersion:	4
Subsystem:	Windows GUI
FileVersionNumber:	9.85.19.77
ProductVersionNumber:	9.87.11.77
FileFlagsMask:	0x003f
FileFlags:	(none)
FileOS:	Win32
ObjectFileType:	Executable application
FileSubtype:	-
LanguageCode:	Neutral
CharacterSet:	Unicode
Comments:	-
CompanyName:	Microsoft Corporation
FileDescription:	-
FileVersion:	9.85.19.77
InternalName:	werfault.exe
LegalCopyright:	Microsoft
LegalTrademarks:	Part of the Windows Operating System
OriginalFileName:	werfault.exe
ProductName:	WerFault Error Manager
ProductVersion:	9.87.11.77
AssemblyVersion:	9.87.11.77

Summary

Architecture:	IMAGE_FILE_MACHINE_I386
Subsystem:	IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date:	20-Feb-2019 17:29:42
Comments:	-
CompanyName:	Microsoft Corporation
FileDescription:	-
FileVersion:	9.85.19.77
InternalName:	werfault.exe
LegalCopyright:	Microsoft
LegalTrademarks:	Part of the Windows Operating System
OriginalFilename:	werfault.exe
ProductName:	WerFault Error Manager
ProductVersion:	9.87.11.77
Assembly Version:	9.87.11.77

DOS Header

Magic number:	MZ
Bytes on last page of file:	0x0090
Pages in file:	0x0003
Relocations:	0x0000
Size of header:	0x0004
Min extra paragraphs:	0x0000
Max extra paragraphs:	0xFFFF
Initial SS value:	0x0000
Initial SP value:	0x00B8
Checksum:	0x0000
Initial IP value:	0x0000
Initial CS value:	0x0000
Overlay number:	0x0000
OEM identifier:	0x0000
OEM information:	0x0000
Address of NE header:	0x00000080

PE Headers

Signature:	PE
Machine:	IMAGE_FILE_MACHINE_I386
Number of sections:	3
Time date stamp:	20-Feb-2019 17:29:42
Pointer to Symbol Table:	0x00000000
Number of symbols:	0
Size of Optional Header:	0x00E0
Characteristics:	IMAGE_FILE_32BIT_MACHINE IMAGE_FILE_EXECUTABLE_IMAGE

Sections

Name	Virtual Address	Virtual Size	Raw Size	Charateristics	Entropy
.text	0x00002000	0x000561E4	0x00056200	IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ	6.44795
.rsrc	0x0005A000	0x000008D4	0x00000A00	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ	5.08728
.reloc	0x0005C000	0x0000000C	0x00000200	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ	0.10191

Resources

Title	Entropy	Size	Codepage	Language	Type
1	5.22615	1171	Latin 1 / Western European	UNKNOWN	RT_MANIFEST

Imports


mscoree.dll

No data.

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All screenshots are available in the full report

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Total processes

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

3096

"C:\Users\admin\AppData\Local\Temp\WerFault.exe"

C:\Users\admin\AppData\Local\Temp\WerFault.exe

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Exit code:

Version:

9.85.19.77

Modules

Images
c:\users\admin\appdata\local\temp\werfault.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\mscoree.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\microsoft.net\framework\v4.0.30319\mscoreei.dll

3128

"C:\Users\admin\AppData\Roaming\WerFault.exe"

C:\Users\admin\AppData\Roaming\WerFault.exe

WerFault.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Exit code:

Version:

9.85.19.77

Modules

Images
c:\users\admin\appdata\roaming\werfault.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\mscoree.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\microsoft.net\framework\v4.0.30319\mscoreei.dll

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Total events

Read events

Write events

Delete events

Modification events


(PID) Process:	(3096) WerFault.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\WerFault_RASAPI32
Operation:	write	Name:	EnableFileTracing
Value: 0
(PID) Process:	(3096) WerFault.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\WerFault_RASAPI32
Operation:	write	Name:	EnableConsoleTracing
Value: 0
(PID) Process:	(3096) WerFault.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\WerFault_RASAPI32
Operation:	write	Name:	FileTracingMask
Value: 4294901760
(PID) Process:	(3096) WerFault.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\WerFault_RASAPI32
Operation:	write	Name:	ConsoleTracingMask
Value: 4294901760
(PID) Process:	(3096) WerFault.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\WerFault_RASAPI32
Operation:	write	Name:	MaxFileSize
Value: 1048576
(PID) Process:	(3096) WerFault.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\WerFault_RASAPI32
Operation:	write	Name:	FileDirectory
Value: %windir%\tracing
(PID) Process:	(3096) WerFault.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\WerFault_RASMANCS
Operation:	write	Name:	EnableFileTracing
Value: 0
(PID) Process:	(3096) WerFault.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\WerFault_RASMANCS
Operation:	write	Name:	EnableConsoleTracing
Value: 0
(PID) Process:	(3096) WerFault.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\WerFault_RASMANCS
Operation:	write	Name:	FileTracingMask
Value: 4294901760
(PID) Process:	(3096) WerFault.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\WerFault_RASMANCS
Operation:	write	Name:	ConsoleTracingMask
Value: 4294901760

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
3096	WerFault.exe	C:\Users\admin\AppData\Roaming\WerFault.exe		executable
		MD5:—	SHA256:—
3128	WerFault.exe	C:\Users\admin\AppData\Roaming\ntusers\02-25-2019		binary
		MD5:—	SHA256:—

Download PCAP, analyze network streams, HTTP content and a lot more at the full report

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HTTP(S) requests

TCP/UDP connections

DNS requests

Threats

HTTP requests

PID	Process	Method	HTTP Code	IP	URL	CN	Type	Size	Reputation
3096	WerFault.exe	GET	200	185.194.141.58:80	http://ip-api.com/json/	DE	text	255 b	malicious
3128	WerFault.exe	GET	200	185.194.141.58:80	http://ip-api.com/json/	DE	text	255 b	malicious

Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID	Process	IP	Domain	ASN	CN	Reputation
3096	WerFault.exe	185.194.141.58:80	ip-api.com	netcup GmbH	DE	unknown
3128	WerFault.exe	86.126.96.197:4782	syssecddos.ddns.net	RCS & RDS	RO	malicious
3128	WerFault.exe	185.194.141.58:80	ip-api.com	netcup GmbH	DE	unknown

DNS requests

Domain	IP	Reputation
ip-api.com	185.194.141.58	malicious
syssecddos.ddns.net	86.126.96.197	malicious
syssecintel.ddns.net	86.126.96.197	malicious

Threats

PID	Process	Class	Message
3096	WerFault.exe	Potential Corporate Privacy Violation	ET POLICY External IP Lookup ip-api.com
3096	WerFault.exe	A Network Trojan was detected	MALWARE [PTsecurity] Quasar 1.3 RAT IP Lookup ip-api.com (HTTP headeer)
3128	WerFault.exe	Potential Corporate Privacy Violation	ET POLICY External IP Lookup ip-api.com
3128	WerFault.exe	A Network Trojan was detected	MALWARE [PTsecurity] Quasar 1.3 RAT IP Lookup ip-api.com (HTTP headeer)

2 ETPRO signatures available at the full report

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No debug info

General Info

WerFault.exe

540E1B4C98187E72B3A8ED26B748E8F2

0A147021C96B94014CB5235C5E58657C6376F904

4BEBEF84FF3459C67447F2F81DC0699C53C37D45F4F19B91443FD8A7F40416F9

6144:wbSiPqU23zkG13+/RHT/akvVb6mHT5yPD5Ql4yJC:qoU2Yvwmz0Dql4aC

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Drops/Copies Quasar RAT executable

Changes the autorun value in the registry

QUASAR was detected

SUSPICIOUS

Checks for external IP

Creates files in the user directory

Executable content was dropped or overwritten

Starts itself from another location

Connects to unusual port

INFO

Malware configuration

Static information

TRiD

EXIF

EXE

Summary

DOS Header

PE Headers

Sections

Resources

Imports

Video and screenshots

Processes

Behavior graph

Specs description

Process information

Information

Modules

Information

Modules

Registry activity

Modification events

Files activity

Dropped files

Network activity

HTTP requests

Connections

DNS requests

Threats

Debug output strings