Malware analysis pskas.dll Malicious activity | ANY.RUN

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File name:	pskas.dll
Full analysis:	https://app.any.run/tasks/93b899ed-e62d-47c5-b284-d2c8f156ad6e
Verdict:	Malicious activity
Analysis date:	February 19, 2019, 10:28:36
OS:	Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
MIME:	application/x-dosexec
File info:	PE32 executable (DLL) (GUI) Intel 80386, for MS Windows
MD5:	992C07082B195A0B39A951D0FDB7C811
SHA1:	40AE8A63B72DBFECFC22DD407FA5B5D19292C3C3
SHA256:	379024104CEF7485D9A0BEFF9A5B9BFFE224F7CA789BF693EE6A1C818715CE78
SSDEEP:	48:6XivZCCaVda2fZvZpCUn5swT+YtG/fFn0yH:RvZCCgZjsNp0y

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
- Loads dropped or rewritten executable
  - svchost.exe (PID: 844)
  - explorer.exe (PID: 116)
SUSPICIOUS
- Uses RUNDLL32.EXE to load library
  - explorer.exe (PID: 116)
INFO
- Loads main object executable
  - rundll32.exe (PID: 2940)

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	\|	Win32 Executable (generic) (52.9)
.exe	\|	Generic Win/DOS Executable (23.5)
.exe	\|	DOS Executable Generic (23.5)

EXIF

EXE

MachineType:	Intel 386 or later, and compatibles
TimeStamp:	2018:03:15 01:49:23+01:00
PEType:	PE32
LinkerVersion:	5.12
CodeSize:	1024
InitializedDataSize:	2560
UninitializedDataSize:	-
EntryPoint:	0x1000
OSVersion:	4
ImageVersion:	-
SubsystemVersion:	4
Subsystem:	Windows GUI

Summary

Architecture:	IMAGE_FILE_MACHINE_I386
Subsystem:	IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date:	15-Mar-2018 00:49:23

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:	0x000000C0

PE Headers

Signature:	PE
Machine:	IMAGE_FILE_MACHINE_I386
Number of sections:	4
Time date stamp:	15-Mar-2018 00:49:23
Pointer to Symbol Table:	0x00000000
Number of symbols:	0
Size of Optional Header:	0x00E0
Characteristics:	IMAGE_FILE_32BIT_MACHINE IMAGE_FILE_DLL IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LINE_NUMS_STRIPPED IMAGE_FILE_LOCAL_SYMS_STRIPPED

Sections

Name	Virtual Address	Virtual Size	Raw Size	Charateristics	Entropy
.text	0x00001000	0x000003A1	0x00000400	IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	5.54836
.rdata	0x00002000	0x000005A5	0x00000600	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ	4.98499
.data	0x00003000	0x00000044	0x00000200	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE	0.942162
.reloc	0x00004000	0x00000028	0x00000200	IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ	0.231158

Exports

Title	Ordinal	Address
AS_FreeAnalysisSystem	1	0x00001078
AS_GetConfigString	2	0x0000109C
AS_InitializeAnalysisSystem	3	0x00001102
AS_SetConfigString	4	0x000010DE
AS_VFClose	5	0x0000105A
AS_VFDelete	6	0x000010D2
AS_VFFilelength	7	0x000010E4
AS_VFGetInfoInt	8	0x00001090
AS_VFGetInfoString	9	0x00001108
AS_VFGetLastError	10	0x000010D8

No data.

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All screenshots are available in the full report

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Total processes

30

Monitored processes

3

Malicious processes

2

Suspicious processes

0

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

116

C:\Windows\Explorer.EXE

C:\Windows\explorer.exe

—

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows Explorer

Exit code:

0

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

844

C:\Windows\system32\svchost.exe -k netsvcs

C:\Windows\System32\svchost.exe

services.exe

User:

SYSTEM

Company:

Microsoft Corporation

Integrity Level:

SYSTEM

Description:

Host Process for Windows Services

Exit code:

0

Version:

6.1.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\windows\system32\svchost.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\ole32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\user32.dll

2940

"C:\Windows\System32\rundll32.exe" "C:\Users\admin\Desktop\pskas.dll.exe", AS_FreeAnalysisSystem

C:\Windows\System32\rundll32.exe

—

explorer.exe

User:

admin

Company:

Microsoft Corporation

Integrity Level:

MEDIUM

Description:

Windows host process (Rundll32)

Exit code:

0

Version:

6.1.7600.16385 (win7_rtm.090713-1255)

Modules

Images
c:\windows\system32\rundll32.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\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\imagehlp.dll

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Total events

1 024

Read events

942

Write events

82

Delete events

0

Modification events


(PID) Process:	(116) explorer.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\MuiCache\5F\52C64B7E
Operation:	write	Name:	LanguageList
Value: en-US
(PID) Process:	(116) explorer.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\MuiCache\5F\52C64B7E
Operation:	write	Name:	@C:\Windows\System32\display.dll,-4
Value: S&creen resolution
(PID) Process:	(116) explorer.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\MuiCache\5F\52C64B7E
Operation:	write	Name:	@C:\Program Files\Common Files\System\wab32res.dll,-4602
Value: Contact file
(PID) Process:	(116) explorer.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\MuiCache\5F\52C64B7E
Operation:	write	Name:	@C:\Program Files\Windows Sidebar\sidebar.exe,-11100
Value: &Gadgets
(PID) Process:	(116) explorer.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\MuiCache\5F\52C64B7E
Operation:	write	Name:	@C:\Windows\system32\themecpl.dll,-10
Value: Pe&rsonalize
(PID) Process:	(116) explorer.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\MuiCache\5F\52C64B7E
Operation:	write	Name:	@"C:\Program Files\Windows Journal\Journal.exe",-3072
Value: Journal Document
(PID) Process:	(116) explorer.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Discardable\PostSetup\ShellNew
Operation:	write	Name:	Classes
Value: .accdb
(PID) Process:	(116) explorer.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Discardable\PostSetup\ShellNew
Operation:	write	Name:	~reserved~
Value: 0800000000000600
(PID) Process:	(116) explorer.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\BagMRU
Operation:	write	Name:	NodeSlots
Value: 02
(PID) Process:	(116) explorer.exe	Key:	HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\BagMRU
Operation:	write	Name:	MRUListEx
Value: FFFFFFFF

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Executable files

0

Suspicious files

0

Text files

0

Unknown types

1

Dropped files

PID	Process	Filename		Type
844	svchost.exe	C:\Windows\appcompat\programs\RecentFileCache.bcf		txt
		MD5:—	SHA256:—

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HTTP(S) requests

0

TCP/UDP connections

0

DNS requests

0

Threats

0

HTTP requests

No HTTP requests

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Connections

No data

DNS requests

No data

Threats

No threats detected

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No debug info

General Info

pskas.dll

992C07082B195A0B39A951D0FDB7C811

40AE8A63B72DBFECFC22DD407FA5B5D19292C3C3

379024104CEF7485D9A0BEFF9A5B9BFFE224F7CA789BF693EE6A1C818715CE78

48:6XivZCCaVda2fZvZpCUn5swT+YtG/fFn0yH:RvZCCgZjsNp0y

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Loads dropped or rewritten executable

SUSPICIOUS

Uses RUNDLL32.EXE to load library

INFO

Loads main object executable

Malware configuration

Static information

TRiD

EXIF

EXE

Summary

DOS Header

PE Headers

Sections

Exports

Video and screenshots

Processes

Behavior graph

Specs description

Process information

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