Malware analysis ef.exe Malicious activity | ANY.RUN

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File name:	ef.exe
Full analysis:	https://app.any.run/tasks/f75999db-05e3-40f3-bb2f-3eb03a616a74
Verdict:	Malicious activity
Threats:	Orcus is a modular Remote Access Trojan with some unusual functions. This RAT enables attackers to create plugins using a custom development library and offers a robust core feature set that makes it one of the most dangerous malicious programs in its class. 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:	June 12, 2019, 06:05:00
OS:	Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:	rat orcus trojan
Indicators:
MIME:	application/x-dosexec
File info:	PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows
MD5:	C595300EC72C6B0E1A3237BF955BF7C2
SHA1:	1EDD3B46584B8E2FE713CCED1EFA66E41FCE1AEB
SHA256:	48E74F21C1D17FDA08548DF007880AF02659E423AFEB764BE29A42C14D3CFB67
SSDEEP:	24576:Gqd4MROxnFj30xXFHXRrZlI0AilFEvxHikn:GqqMi1sRhrZlI0AilFEvxHi

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:: 300 seconds
Heavy Evasion option:: off
Network geolocation:: off
Additional time used:: 240 seconds
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 (73.0.3683.75)
Google Update Helper (1.3.33.23)
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 65.0.2 (x86 en-US) (65.0.2)
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
- Application was dropped or rewritten from another process
  - Skype.exe (PID: 3512)
  - Skype.exe (PID: 1896)
- Loads the Task Scheduler COM API
  - ef.exe (PID: 2176)
- Starts Visual C# compiler
  - ef.exe (PID: 2176)
  - ef.exe (PID: 124)
- Orcus was detected
  - ef.exe (PID: 124)
  - ef.exe (PID: 2176)
- Orcus RAT was detected
  - Skype.exe (PID: 3512)
SUSPICIOUS
- Executed via Task Scheduler
  - ef.exe (PID: 124)
- Executable content was dropped or overwritten
  - csc.exe (PID: 636)
  - ef.exe (PID: 2176)
- Application launched itself
  - Skype.exe (PID: 3512)
- Creates files in the user directory
  - ef.exe (PID: 2176)
- Changes the desktop background image
  - ef.exe (PID: 2176)
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

AssemblyVersion:	1.0.0.0
ProductVersion:	1.0.0.0
ProductName:	-
OriginalFileName:	Orcus.exe
LegalTrademarks:	-
LegalCopyright:	-
InternalName:	Orcus.exe
FileVersion:	1.0.0.0
FileDescription:	-
CompanyName:	-
Comments:	-
CharacterSet:	Unicode
LanguageCode:	Neutral
FileSubtype:	-
ObjectFileType:	Executable application
FileOS:	Win32
FileFlags:	(none)
FileFlagsMask:	0x003f
ProductVersionNumber:	1.0.0.0
FileVersionNumber:	1.0.0.0
Subsystem:	Windows GUI
SubsystemVersion:	4
ImageVersion:	-
OSVersion:	4
EntryPoint:	0xe3a5e
UninitializedDataSize:	-
InitializedDataSize:	4608
CodeSize:	924672
LinkerVersion:	8
PEType:	PE32
TimeStamp:	2019:06:12 08:04:37+02:00
MachineType:	Intel 386 or later, and compatibles

Summary

Architecture:	IMAGE_FILE_MACHINE_I386
Subsystem:	IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date:	12-Jun-2019 06:04:37
Comments:	-
CompanyName:	-
FileDescription:	-
FileVersion:	1.0.0.0
InternalName:	Orcus.exe
LegalCopyright:	-
LegalTrademarks:	-
OriginalFilename:	Orcus.exe
ProductName:	-
ProductVersion:	1.0.0.0
Assembly Version:	1.0.0.0

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:	12-Jun-2019 06:04:37
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	0x000E1A64	0x000E1C00	IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ	7.15427
.rsrc	0x000E4000	0x00001000	0x00001000	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ	4.99491
.reloc	0x000E6000	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	4.99793	3128	UNKNOWN	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
2176	"C:\Users\admin\AppData\Local\Temp\ef.exe"	C:\Users\admin\AppData\Local\Temp\ef.exe		explorer.exe
User: admin Integrity Level: MEDIUM Version: 1.0.0.0
1564	"C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\admin\AppData\Local\Temp\njfrtni2.cmdline"	C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe	—	ef.exe
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Visual C# Command Line Compiler Exit code: 0 Version: 8.0.50727.4927 (NetFXspW7.050727-4900)
3404	C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\admin\AppData\Local\Temp\RESF134.tmp" "c:\Users\admin\AppData\Local\Temp\CSCF133.tmp"	C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe	—	csc.exe
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Microsoft® Resource File To COFF Object Conversion Utility Exit code: 0 Version: 8.00.50727.4940 (Win7SP1.050727-5400)
124	C:\Users\admin\AppData\Local\Temp\ef.exe	C:\Users\admin\AppData\Local\Temp\ef.exe		taskeng.exe
User: admin Integrity Level: MEDIUM Exit code: 0 Version: 1.0.0.0
636	"C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\admin\AppData\Local\Temp\mrcrfkjh.cmdline"	C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe		ef.exe
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Visual C# Command Line Compiler Exit code: 0 Version: 8.0.50727.4927 (NetFXspW7.050727-4900)
3512	"C:\Users\admin\AppData\Roaming\Skype.exe" /launchSelfAndExit "C:\Users\admin\AppData\Local\Temp\ef.exe" 2176 /protectFile	C:\Users\admin\AppData\Roaming\Skype.exe		ef.exe
User: admin Integrity Level: MEDIUM Exit code: 1896 Version: 1.0.0.0
2924	C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\admin\AppData\Local\Temp\RESF6A3.tmp" "c:\Users\admin\AppData\Local\Temp\CSCF692.tmp"	C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe	—	csc.exe
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Microsoft® Resource File To COFF Object Conversion Utility Exit code: 0 Version: 8.00.50727.4940 (Win7SP1.050727-5400)
1896	"C:\Users\admin\AppData\Roaming\Skype.exe" /watchProcess "C:\Users\admin\AppData\Local\Temp\ef.exe" 2176 "/protectFile"	C:\Users\admin\AppData\Roaming\Skype.exe	—	Skype.exe
User: admin Integrity Level: MEDIUM Version: 1.0.0.0

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Total events

803

Read events

771

Write events

Delete events

Modification events


(PID) Process:	(2176) ef.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:	write	Name:	UNCAsIntranet
Value: 0
(PID) Process:	(2176) ef.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:	write	Name:	AutoDetect
Value: 1
(PID) Process:	(3512) Skype.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:	write	Name:	UNCAsIntranet
Value: 0
(PID) Process:	(3512) Skype.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
Operation:	write	Name:	AutoDetect
Value: 1
(PID) Process:	(2176) ef.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\MuiCache\62\52C64B7E
Operation:	write	Name:	LanguageList
Value: en-US
(PID) Process:	(2176) ef.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\ef_RASAPI32
Operation:	write	Name:	EnableFileTracing
Value: 0
(PID) Process:	(2176) ef.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\ef_RASAPI32
Operation:	write	Name:	EnableConsoleTracing
Value: 0
(PID) Process:	(2176) ef.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\ef_RASAPI32
Operation:	write	Name:	FileTracingMask
Value: 4294901760
(PID) Process:	(2176) ef.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\ef_RASAPI32
Operation:	write	Name:	ConsoleTracingMask
Value: 4294901760
(PID) Process:	(2176) ef.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\ef_RASAPI32
Operation:	write	Name:	MaxFileSize
Value: 1048576

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
3404	cvtres.exe	C:\Users\admin\AppData\Local\Temp\RESF134.tmp		—
		MD5:—	SHA256:—
1564	csc.exe	C:\Users\admin\AppData\Local\Temp\njfrtni2.dll		—
		MD5:—	SHA256:—
1564	csc.exe	C:\Users\admin\AppData\Local\Temp\njfrtni2.out		—
		MD5:—	SHA256:—
636	csc.exe	C:\Users\admin\AppData\Local\Temp\CSCF692.tmp		—
		MD5:—	SHA256:—
2924	cvtres.exe	C:\Users\admin\AppData\Local\Temp\RESF6A3.tmp		—
		MD5:—	SHA256:—
636	csc.exe	C:\Users\admin\AppData\Local\Temp\mrcrfkjh.out		—
		MD5:—	SHA256:—
2176	ef.exe	C:\Users\admin\AppData\Local\Temp\Cab2A54.tmp		—
		MD5:—	SHA256:—
2176	ef.exe	C:\Users\admin\AppData\Local\Temp\Tar2A55.tmp		—
		MD5:—	SHA256:—
2176	ef.exe	C:\Users\admin\AppData\Local\Temp\Cab2A75.tmp		—
		MD5:—	SHA256:—
2176	ef.exe	C:\Users\admin\AppData\Local\Temp\Tar2A76.tmp		—
		MD5:—	SHA256:—

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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
2176	ef.exe	GET	200	67.27.159.254:80	http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab	US	compressed	56.2 Kb	whitelisted

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Connections

PID	Process	IP	Domain	ASN	CN	Reputation
2176	ef.exe	162.159.133.233:443	cdn.discordapp.com	Cloudflare Inc	—	shared
2176	ef.exe	67.27.159.254:80	www.download.windowsupdate.com	Level 3 Communications, Inc.	US	malicious
2176	ef.exe	199.195.250.222:9161	thatsgay.duckdns.org	FranTech Solutions	US	malicious

DNS requests

Domain	IP	Reputation
thatsgay.duckdns.org	199.195.250.222	malicious
www.download.windowsupdate.com	67.27.159.254 67.27.234.254 67.27.233.254 8.248.113.254 8.253.207.120	whitelisted
cdn.discordapp.com	162.159.133.233 162.159.130.233 162.159.129.233 162.159.135.233 162.159.134.233	shared

Threats

PID	Process	Class	Message
—	—	Misc activity	ET INFO DYNAMIC_DNS Query to *.duckdns. Domain
2176	ef.exe	A Network Trojan was detected	MALWARE [PTsecurity] Observed Malicious SSL Certificate (Orcus RAT)
2176	ef.exe	A Network Trojan was detected	MALWARE [PTsecurity] Observed Malicious SSL Certificate (Orcus RAT)
2176	ef.exe	A Network Trojan was detected	MALWARE [PTsecurity] Malicious SSL connection (Orcus RAT)

1 ETPRO signatures available at the full report

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No debug info

General Info

ef.exe

C595300EC72C6B0E1A3237BF955BF7C2

1EDD3B46584B8E2FE713CCED1EFA66E41FCE1AEB

48E74F21C1D17FDA08548DF007880AF02659E423AFEB764BE29A42C14D3CFB67

24576:Gqd4MROxnFj30xXFHXRrZlI0AilFEvxHikn:GqqMi1sRhrZlI0AilFEvxHi

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Application was dropped or rewritten from another process

Loads the Task Scheduler COM API

Starts Visual C# compiler

Orcus was detected

Orcus RAT was detected

SUSPICIOUS

Executed via Task Scheduler

Executable content was dropped or overwritten

Application launched itself

Creates files in the user directory

Changes the desktop background image

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

Information

Information

Information

Information

Information

Information

Information

Registry activity

Modification events

Files activity

Dropped files

Network activity

HTTP requests

Connections

DNS requests

Threats

Debug output strings