Malware analysis ConfuserEx KoiVMDEVIRT.rar Malicious activity

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File name:	ConfuserEx KoiVMDEVIRT.rar
Full analysis:	https://app.any.run/tasks/2822c51b-8bf4-4946-bceb-c6600fb9cb7e
Verdict:	Malicious activity
Analysis date:	July 18, 2019, 01:14:26
OS:	Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Indicators:
MIME:	application/x-rar
File info:	RAR archive data, v5
MD5:	E63E0A1F538B8CE778714BF2CE74933A
SHA1:	2468EAD952ACF7E75E10CE5F56672D9FCB7CB62E
SHA256:	A651846310FEB6A6973E4F9AFA3DEE6D0401F74C58AC11DC2837B7F24C0FC755
SSDEEP:	6144:F5EdWOz7JU2DxdCnLl5/f1obf3ILZqGfCd7tiJ4b/+VxZeszPFNeIf7e7DKC0KjH:BUS2DHYf1o73KaCJEEx0szmITe2Kj6I

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 (75.0.3770.100)
Google Update Helper (1.3.34.7)
Java 8 Update 92 (8.0.920.14)
Java Auto Updater (2.8.92.14)
Microsoft .NET Framework 4.7.2 (4.7.03062)
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++ 2015-2019 Redistributable (x86) - 14.21.27702 (14.21.27702.2)
Microsoft Visual C++ 2019 X86 Additional Runtime - 14.21.27702 (14.21.27702)
Microsoft Visual C++ 2019 X86 Minimum Runtime - 14.21.27702 (14.21.27702)
Mozilla Firefox 67.0.4 (x86 en-US) (67.0.4)
Notepad++ (32-bit x86) (7.5.1)
Opera 12.15 (12.15.1748)
Skype version 8.29 (8.29)
Update for Microsoft .NET Framework 4.7.2 (KB4087364) (1)
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
KB4019990
KB976902
LocalPack AU Package
LocalPack CA Package
LocalPack GB Package
LocalPack US Package
LocalPack ZA Package
ProfessionalEdition
UltimateEdition

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MALICIOUS
- Loads dropped or rewritten executable
  - explorer.exe (PID: 304)
  - SearchProtocolHost.exe (PID: 1724)
- Application was dropped or rewritten from another process
  - KoiVMDevirtualizer.exe (PID: 2200)
  - KoiVMDevirtualizer.exe (PID: 3020)
SUSPICIOUS
- Uses RUNDLL32.EXE to load library
  - explorer.exe (PID: 304)
- Starts Internet Explorer
  - rundll32.exe (PID: 692)
- Reads Internet Cache Settings
  - explorer.exe (PID: 304)
INFO
- Manual execution by user
  - KoiVMDevirtualizer.exe (PID: 2200)
- Changes internet zones settings
  - iexplore.exe (PID: 3852)
- Creates files in the user directory
  - iexplore.exe (PID: 4044)
- Reads Internet Cache Settings
  - iexplore.exe (PID: 4044)
- Reads settings of System Certificates
  - iexplore.exe (PID: 3852)
- Reads internet explorer settings
  - iexplore.exe (PID: 4044)
- Adds / modifies Windows certificates
  - iexplore.exe (PID: 3852)
- Changes settings of System certificates
  - iexplore.exe (PID: 3852)
- Dropped object may contain Bitcoin addresses
  - iexplore.exe (PID: 4044)

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

.rar	\|	RAR compressed archive (v5.0) (61.5)
.rar	\|	RAR compressed archive (gen) (38.4)

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

304

C:\Windows\Explorer.EXE

C:\Windows\explorer.exe

—

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows Explorer

Exit code:

Version:

6.1.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\windows\system32\winanr.dll
c:\windows\system32\mswsock.dll
c:\windows\system32\wshtcpip.dll
c:\windows\explorer.exe
c:\windows\system32\ntdll.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

692

"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\admin\Desktop\de4dot.blocks.dll

C:\Windows\system32\rundll32.exe

—

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows host process (Rundll32)

Exit code:

Version:

6.1.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\windows\system32\rundll32.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\imagehlp.dll

1724

"C:\Windows\system32\SearchProtocolHost.exe" Global\UsGthrFltPipeMssGthrPipe8_ Global\UsGthrCtrlFltPipeMssGthrPipe8 1 -2147483646 "Software\Microsoft\Windows Search" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT; MS Search 4.0 Robot)" "C:\ProgramData\Microsoft\Search\Data\Temp\usgthrsvc" "DownLevelDaemon"

C:\Windows\System32\SearchProtocolHost.exe

—

SearchIndexer.exe

User:

SYSTEM

Company:

Microsoft Corporation

Integrity Level:

SYSTEM

Description:

Microsoft Windows Search Protocol Host

Exit code:

Version:

7.00.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\windows\system32\searchprotocolhost.exe
c:\windows\system32\ntdll.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\system32\user32.dll
c:\windows\system32\gdi32.dll

2200

"C:\Users\admin\Desktop\KoiVMDevirtualizer.exe"

C:\Users\admin\Desktop\KoiVMDevirtualizer.exe

—

explorer.exe

User:

admin

Integrity Level:

MEDIUM

Description:

KoivmDevirt

Exit code:

3221225786

Version:

1.0.0.0

Modules

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

3020

"C:\Users\admin\Desktop\KoiVMDevirtualizer.exe"

C:\Users\admin\Desktop\KoiVMDevirtualizer.exe

—

explorer.exe

User:

admin

Integrity Level:

MEDIUM

Description:

KoivmDevirt

Exit code:

Version:

1.0.0.0

Modules

Images
c:\users\admin\desktop\koivmdevirtualizer.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

3456

"C:\Program Files\WinRAR\WinRAR.exe" "C:\Users\admin\AppData\Local\Temp\ConfuserEx KoiVMDEVIRT.rar"

C:\Program Files\WinRAR\WinRAR.exe

—

explorer.exe

User:

admin

Company:

Alexander Roshal

Integrity Level:

MEDIUM

Description:

WinRAR archiver

Exit code:

Version:

5.60.0

Modules

Images
c:\program files\winrar\winrar.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\usp10.dll
c:\windows\system32\comdlg32.dll

3852

"C:\Program Files\Internet Explorer\iexplore.exe" -nohome

C:\Program Files\Internet Explorer\iexplore.exe

rundll32.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Internet Explorer

Exit code:

Version:

8.00.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\program files\internet explorer\iexplore.exe
c:\systemroot\system32\ntdll.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\system32\user32.dll
c:\windows\system32\gdi32.dll

4044

"C:\Program Files\Internet Explorer\iexplore.exe" SCODEF:3852 CREDAT:71937

C:\Program Files\Internet Explorer\iexplore.exe

iexplore.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

LOW

Description:

Internet Explorer

Exit code:

Version:

8.00.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\program files\internet explorer\iexplore.exe
c:\systemroot\system32\ntdll.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\system32\user32.dll
c:\windows\system32\gdi32.dll

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Total events

1 820

Read events

1 706

Write events

110

Delete events

Modification events


(PID) Process:	(3456) WinRAR.exe	Key:	HKEY_CURRENT_USER\Software\WinRAR\Interface\Themes
Operation:	write	Name:	ShellExtBMP
Value:
(PID) Process:	(3456) WinRAR.exe	Key:	HKEY_CURRENT_USER\Software\WinRAR\Interface\Themes
Operation:	write	Name:	ShellExtIcon
Value:
(PID) Process:	(3456) WinRAR.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\MuiCache\70\52C64B7E
Operation:	write	Name:	LanguageList
Value: en-US
(PID) Process:	(3456) WinRAR.exe	Key:	HKEY_CURRENT_USER\Software\WinRAR\ArcHistory
Operation:	write	Name:	0
Value: C:\Users\admin\AppData\Local\Temp\ConfuserEx KoiVMDEVIRT.rar
(PID) Process:	(3456) WinRAR.exe	Key:	HKEY_CURRENT_USER\Software\WinRAR\FileList\FileColumnWidths
Operation:	write	Name:	name
Value: 120
(PID) Process:	(3456) WinRAR.exe	Key:	HKEY_CURRENT_USER\Software\WinRAR\FileList\FileColumnWidths
Operation:	write	Name:	size
Value: 80
(PID) Process:	(3456) WinRAR.exe	Key:	HKEY_CURRENT_USER\Software\WinRAR\FileList\FileColumnWidths
Operation:	write	Name:	type
Value: 120
(PID) Process:	(3456) WinRAR.exe	Key:	HKEY_CURRENT_USER\Software\WinRAR\FileList\FileColumnWidths
Operation:	write	Name:	mtime
Value: 100
(PID) Process:	(304) explorer.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.rar\OpenWithList
Operation:	write	Name:	a
Value: WinRAR.exe
(PID) Process:	(304) explorer.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.rar\OpenWithList
Operation:	write	Name:	MRUList
Value: a

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
3456	WinRAR.exe	C:\Users\admin\AppData\Local\Temp\Rar$DRa3456.49424\KoiVMDevirtualizer.exe		—
		MD5:—	SHA256:—
3456	WinRAR.exe	C:\Users\admin\AppData\Local\Temp\Rar$DRa3456.49424\dnlib.dll		—
		MD5:—	SHA256:—
3456	WinRAR.exe	C:\Users\admin\AppData\Local\Temp\Rar$DRa3456.49424\de4dot.blocks.dll		—
		MD5:—	SHA256:—
3852	iexplore.exe	C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\JGRR2OYX\favicon[1].ico		—
		MD5:—	SHA256:—
3852	iexplore.exe	C:\Users\admin\AppData\LocalLow\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico		—
		MD5:—	SHA256:—
4044	iexplore.exe	C:\Users\admin\AppData\Roaming\Microsoft\Windows\Cookies\Low\admin@bing[2].txt		—
		MD5:—	SHA256:—
4044	iexplore.exe	C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Low\Content.IE5\E6O7JV3K\search[1].txt		—
		MD5:—	SHA256:—
304	explorer.exe	C:\Users\admin\Desktop\de4dot.blocks.dll		executable
		MD5:—	SHA256:—
304	explorer.exe	C:\Users\admin\Desktop\KoiVMDevirtualizer.exe		executable
		MD5:—	SHA256:—
4044	iexplore.exe	C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Low\Content.IE5\index.dat		dat
		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
4044	iexplore.exe	GET	302	2.19.38.59:80	http://go.microsoft.com/fwlink/?LinkId=57426&Ext=dll	unknown	—	—	whitelisted
4044	iexplore.exe	GET	301	2.16.186.27:80	http://shell.windows.com/fileassoc/fileassoc.asp?Ext=dll	unknown	—	—	whitelisted
3852	iexplore.exe	GET	200	204.79.197.200:80	http://www.bing.com/favicon.ico	US	image	237 b	whitelisted

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

Connections

PID	Process	IP	Domain	ASN	CN	Reputation
3852	iexplore.exe	204.79.197.200:80	www.bing.com	Microsoft Corporation	US	whitelisted
4044	iexplore.exe	2.19.38.59:80	go.microsoft.com	Akamai International B.V.	—	whitelisted
4044	iexplore.exe	2.16.186.27:80	shell.windows.com	Akamai International B.V.	—	whitelisted
4044	iexplore.exe	204.79.197.200:443	www.bing.com	Microsoft Corporation	US	whitelisted
3852	iexplore.exe	204.79.197.200:443	www.bing.com	Microsoft Corporation	US	whitelisted
4044	iexplore.exe	40.90.23.236:443	login.live.com	Microsoft Corporation	US	unknown

DNS requests

Domain	IP	Reputation
www.bing.com	204.79.197.200 13.107.21.200	whitelisted
go.microsoft.com	2.19.38.59	whitelisted
shell.windows.com	2.16.186.27 2.16.186.24	whitelisted
login.live.com	40.90.23.236 40.90.23.206 40.90.23.234	whitelisted

Threats

No threats detected

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No debug info

General Info

ConfuserEx KoiVMDEVIRT.rar

E63E0A1F538B8CE778714BF2CE74933A

2468EAD952ACF7E75E10CE5F56672D9FCB7CB62E

A651846310FEB6A6973E4F9AFA3DEE6D0401F74C58AC11DC2837B7F24C0FC755

6144:F5EdWOz7JU2DxdCnLl5/f1obf3ILZqGfCd7tiJ4b/+VxZeszPFNeIf7e7DKC0KjH:BUS2DHYf1o73KaCJEEx0szmITe2Kj6I

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Loads dropped or rewritten executable

Application was dropped or rewritten from another process

SUSPICIOUS

Uses RUNDLL32.EXE to load library

Starts Internet Explorer

Reads Internet Cache Settings

INFO

Manual execution by user

Changes internet zones settings

Creates files in the user directory

Reads Internet Cache Settings

Reads settings of System Certificates

Reads internet explorer settings

Adds / modifies Windows certificates

Changes settings of System certificates

Dropped object may contain Bitcoin addresses

Malware configuration

Static information

TRiD

Video and screenshots

Processes

Behavior graph

Specs description

Process information

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Information

Modules

Registry activity

Modification events

Files activity

Dropped files

Network activity

HTTP requests

Connections

DNS requests

Threats

Debug output strings