Malware analysis Iostream.exe Malicious activity | ANY.RUN

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File name:	Iostream.exe
Full analysis:	https://app.any.run/tasks/c18f8762-91df-45c9-b238-60319e0898aa
Verdict:	Malicious activity
Analysis date:	April 25, 2019, 13:43:17
OS:	Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Indicators:
MIME:	application/x-dosexec
File info:	PE32 executable (GUI) Intel 80386, for MS Windows
MD5:	8A23F732481FA4D1AB3322B0AB6D1CD3
SHA1:	57431747E37DA8EB687F82B0FC32511FB83220AB
SHA256:	AEED751E77E3A58D908638BBAF2DF2E2D39F05103DA12F982D9400C67BD78583
SSDEEP:	24576:U+gLjOb5a6y887m6opvv/qOj4L741psF36yg8xYZ:vUyPy88mfP7j0zZ

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 (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
- Uses Task Scheduler to run other applications
  - Iostream.exe (PID: 1080)
  - Iostream.exe (PID: 3520)
- Loads the Task Scheduler COM API
  - schtasks.exe (PID: 2456)
  - schtasks.exe (PID: 2268)
- Runs app for hidden code execution
  - Iostream.exe (PID: 1080)
SUSPICIOUS
- Uses ATTRIB.EXE to modify file attributes
  - Iostream.exe (PID: 1080)
- Executable content was dropped or overwritten
  - Iostream.exe (PID: 1080)
  - Iostream.exe (PID: 3520)
INFO
- Reads Microsoft Office registry keys
  - WINWORD.EXE (PID: 3388)
- Creates files in the user directory
  - WINWORD.EXE (PID: 3388)

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

.dll	\|	Win32 Dynamic Link Library (generic) (43.5)
.exe	\|	Win32 Executable (generic) (29.8)
.exe	\|	Generic Win/DOS Executable (13.2)
.exe	\|	DOS Executable Generic (13.2)

EXIF

EXE

MachineType:	Intel 386 or later, and compatibles
TimeStamp:	2018:04:06 14:21:50+02:00
PEType:	PE32
LinkerVersion:	14
CodeSize:	160768
InitializedDataSize:	678912
UninitializedDataSize:	-
EntryPoint:	0x286000
OSVersion:	6
ImageVersion:	-
SubsystemVersion:	6
Subsystem:	Windows GUI

Summary

Architecture:	IMAGE_FILE_MACHINE_I386
Subsystem:	IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date:	06-Apr-2018 12:21:50
Detected languages:	English - United States

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:	0x00000100

PE Headers

Signature:	PE
Machine:	IMAGE_FILE_MACHINE_I386
Number of sections:	6
Time date stamp:	06-Apr-2018 12:21:50
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
	0x00001000	0x000CC000	0x0005B800	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	7.98822
.rsrc	0x000CD000	0x000001E0	0x00000200	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	4.49012
.idata	0x000CE000	0x00001000	0x00000200	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	1.30872
	0x000CF000	0x00103000	0x00000200	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	0.260771
vpxwflbh	0x001D2000	0x000B4000	0x000B3C00	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	7.9233
dqbhgykr	0x00286000	0x00001000	0x00000200	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	4.52206

Resources

Title	Entropy	Size	Codepage	Language	Type
1	4.91161	381	UNKNOWN	English - United States	RT_MANIFEST

Imports


comctl32.dll
kernel32.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

912

C:\Windows\system32\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}

C:\Windows\system32\DllHost.exe

—

svchost.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

COM Surrogate

Exit code:

Version:

6.1.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\windows\system32\dllhost.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\ole32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\user32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll

1080

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

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

explorer.exe

User:

admin

Integrity Level:

MEDIUM

Exit code:

Modules

Images
c:\users\admin\appdata\local\temp\iostream.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_5.82.7601.17514_none_ec83dffa859149af\comctl32.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\gdi32.dll

2268

schtasks /create /tn WindowsRecoveryCleaner /tr "C:\ProgramData\Iostream.exe" /st 00:00 /sc daily /du 9999:59 /ri 1 /f

C:\Windows\system32\schtasks.exe

—

Iostream.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Manages scheduled tasks

Exit code:

Version:

6.1.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\windows\system32\schtasks.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\ole32.dll

2456

schtasks /create /tn WindowsRecoveryCleaner /tr "C:\ProgramData\Iostream.exe" /st 00:00 /sc daily /du 9999:59 /ri 1 /f

C:\Windows\system32\schtasks.exe

—

Iostream.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Manages scheduled tasks

Exit code:

Version:

6.1.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\windows\system32\schtasks.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\ole32.dll

3388

"C:\Program Files\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\admin\Desktop\buswith.rtf"

C:\Program Files\Microsoft Office\Office14\WINWORD.EXE

—

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Microsoft Word

Exit code:

Version:

14.0.6024.1000

Modules

Images
c:\program files\microsoft office\office14\winword.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\winsxs\x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.6161_none_50934f2ebcb7eb57\msvcr90.dll
c:\windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_5.82.7601.17514_none_ec83dffa859149af\comctl32.dll

3520

C:\ProgramData\Iostream.exe

taskeng.exe

User:

admin

Integrity Level:

MEDIUM

Exit code:

Modules

Images
c:\programdata\iostream.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_5.82.7601.17514_none_ec83dffa859149af\comctl32.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\gdi32.dll

3668

"C:\Windows\System32\attrib.exe"

C:\Windows\System32\attrib.exe

Iostream.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Attribute Utility

Exit code:

Version:

6.1.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\windows\system32\attrib.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\ws2_32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\nsi.dll
c:\windows\system32\iphlpapi.dll
c:\windows\system32\winnsi.dll

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Total events

738

Read events

680

Write events

Delete events

Modification events


(PID) Process:	(912) DllHost.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Direct3D\MostRecentApplication
Operation:	write	Name:	Name
Value: DllHost.exe
(PID) Process:	(912) DllHost.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows Photo Viewer\Viewer
Operation:	write	Name:	MainWndPos
Value: 6000000034000000A00400008002000000000000
(PID) Process:	(3388) WINWORD.EXE	Key:	HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Word\Resiliency\StartupItems
Operation:	write	Name:	{%5
Value: 7B2535003C0D0000010000000000000000000000
(PID) Process:	(3388) WINWORD.EXE	Key:	HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Common\LanguageResources\EnabledLanguages
Operation:	write	Name:	1033
Value: Off
(PID) Process:	(3388) WINWORD.EXE	Key:	HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Common\LanguageResources\EnabledLanguages
Operation:	write	Name:	1033
Value: On
(PID) Process:	(3388) WINWORD.EXE	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\00004109D30000000000000000F01FEC\Usage
Operation:	write	Name:	WORDFiles
Value: 1318649887
(PID) Process:	(3388) WINWORD.EXE	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\00004109D30000000000000000F01FEC\Usage
Operation:	write	Name:	ProductFiles
Value: 1318650000
(PID) Process:	(3388) WINWORD.EXE	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\00004109D30000000000000000F01FEC\Usage
Operation:	write	Name:	ProductFiles
Value: 1318650001
(PID) Process:	(3388) WINWORD.EXE	Key:	HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Word
Operation:	write	Name:	MTTT
Value: 3C0D0000AE5193006DFBD40100000000
(PID) Process:	(3388) WINWORD.EXE	Key:	HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Word\Resiliency\StartupItems
Operation:	write	Name:	>'5
Value: 3E2735003C0D000004000000000000008C00000001000000840000003E0043003A005C00550073006500720073005C00610064006D0069006E005C0041007000700044006100740061005C0052006F0061006D0069006E0067005C004D006900630072006F0073006F00660074005C00540065006D0070006C0061007400650073005C004E006F0072006D0061006C002E0064006F0074006D00000000000000

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
3388	WINWORD.EXE	C:\Users\admin\AppData\Local\Temp\CVR116C.tmp.cvr		—
		MD5:—	SHA256:—
3388	WINWORD.EXE	C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.Word\~WRS{485E50D0-BA79-4B03-B8BA-082F010035BB}.tmp		—
		MD5:—	SHA256:—
3388	WINWORD.EXE	C:\Users\admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.Word\~WRS{32EB6166-9CDE-4BA0-9BD4-3224EB5FDF22}.tmp		—
		MD5:—	SHA256:—
1080	Iostream.exe	C:\ProgramData\Iostream.exe		executable
		MD5:—	SHA256:—
3520	Iostream.exe	C:\ProgramData\Iostream.exe		executable
		MD5:—	SHA256:—
3388	WINWORD.EXE	C:\Users\admin\Desktop\~$uswith.rtf		pgc
		MD5:—	SHA256:—
3388	WINWORD.EXE	C:\Users\admin\AppData\Roaming\Microsoft\Templates\~$Normal.dotm		pgc
		MD5:—	SHA256:—
3388	WINWORD.EXE	C:\Users\admin\AppData\Roaming\Microsoft\Office\Recent\buswith.rtf.LNK		lnk
		MD5:—	SHA256:—
3388	WINWORD.EXE	C:\Users\admin\AppData\Roaming\Microsoft\Office\Recent\index.dat		text
		MD5:—	SHA256:—

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HTTP(S) requests

TCP/UDP connections

DNS requests

Threats

HTTP requests

No HTTP requests

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Connections

PID	Process	IP	Domain	ASN	CN	Reputation
3668	attrib.exe	78.155.199.111:3333	—	HLL LLC	RU	unknown

DNS requests

No data

Threats

No threats detected

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Process	Message
Iostream.exe	%s------------------------------------------------ --- Themida Professional --- --- (c)2012 Oreans Technologies --- ------------------------------------------------
Iostream.exe	%s------------------------------------------------ --- Themida Professional --- --- (c)2012 Oreans Technologies --- ------------------------------------------------

General Info

Iostream.exe

8A23F732481FA4D1AB3322B0AB6D1CD3

57431747E37DA8EB687F82B0FC32511FB83220AB

AEED751E77E3A58D908638BBAF2DF2E2D39F05103DA12F982D9400C67BD78583

24576:U+gLjOb5a6y887m6opvv/qOj4L741psF36yg8xYZ:vUyPy88mfP7j0zZ

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Uses Task Scheduler to run other applications

Loads the Task Scheduler COM API

Runs app for hidden code execution

SUSPICIOUS

Uses ATTRIB.EXE to modify file attributes

Executable content was dropped or overwritten

INFO

Reads Microsoft Office registry keys

Creates files in the user directory

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

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