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| File name: | starpdf_home.exe |
| Full analysis: | https://app.any.run/tasks/00046c92-e4c5-45e0-9a1f-a78d5305c19a |
| Verdict: | Malicious activity |
| Threats: | A loader is malicious software that infiltrates devices to deliver malicious payloads. This malware is capable of infecting victims’ computers, analyzing their system information, and installing other types of threats, such as trojans or stealers. Criminals usually deliver loaders through phishing emails and links by relying on social engineering to trick users into downloading and running their executables. Loaders employ advanced evasion and persistence tactics to avoid detection. |
| Analysis date: | April 23, 2019, 12:38:05 |
| OS: | Windows 7 Professional Service Pack 1 (build: 7601, 32 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-dosexec |
| File info: | PE32 executable (GUI) Intel 80386, for MS Windows, Nullsoft Installer self-extracting archive |
| MD5: | 8C35859D0ECCBC75CAE22A21EBEAD02A |
| SHA1: | 5BFC4100C7255EC8A3BC74E57E0192EF0AA7AF1A |
| SHA256: | 59F56190DD53EC02CF6034655AFE0AC6E90F12A0EF2C854593E05E377AE76908 |
| SSDEEP: | 196608:sDXcbtRc5C4VRsSt9hU56v5scsG00gD7K15NRejWiwNXrVnUW+7:srytRkgSRU5wsegD7K15NRe5wNXJnG7 |
MALICIOUS
Loads dropped or rewritten executable
- starpdf_home.exe (PID: 4064)
- startools_addpdf.exe (PID: 3832)
- starzip_addpdf.exe (PID: 3828)
- StarPDF.exe (PID: 2656)
Changes the autorun value in the registry
- startools_addpdf.exe (PID: 3832)
- starpdf_home.exe (PID: 4064)
- starzip_addpdf.exe (PID: 3828)
Application was dropped or rewritten from another process
- startools_addpdf.exe (PID: 3832)
- nsF6D1.tmp (PID: 2608)
- starzip_addpdf.exe (PID: 3828)
- nsA13A.tmp (PID: 3448)
- starzipextchg.exe (PID: 4020)
- StarPDF.exe (PID: 2656)
Loads the Task Scheduler COM API
- schtasks.exe (PID: 4056)
- schtasks.exe (PID: 2312)
Uses Task Scheduler to run other applications
- nsF6D1.tmp (PID: 2608)
- nsA13A.tmp (PID: 3448)
Downloads executable files from the Internet
- starpdf_home.exe (PID: 4064)
SUSPICIOUS
Executable content was dropped or overwritten
- startools_addpdf.exe (PID: 3832)
- starpdf_home.exe (PID: 4064)
- starzip_addpdf.exe (PID: 3828)
Creates files in the program directory
- starpdf_home.exe (PID: 4064)
- startools_addpdf.exe (PID: 3832)
- starzip_addpdf.exe (PID: 3828)
Creates files in the user directory
- starpdf_home.exe (PID: 4064)
Creates a software uninstall entry
- startools_addpdf.exe (PID: 3832)
- starpdf_home.exe (PID: 4064)
- starzip_addpdf.exe (PID: 3828)
Starts CMD.EXE for commands execution
- startools_addpdf.exe (PID: 3832)
- starzip_addpdf.exe (PID: 3828)
Creates COM task schedule object
- starpdf_home.exe (PID: 4064)
- starzip_addpdf.exe (PID: 3828)
Starts application with an unusual extension
- starpdf_home.exe (PID: 4064)
- starzip_addpdf.exe (PID: 3828)
Modifies the open verb of a shell class
- starpdf_home.exe (PID: 4064)
- starzipextchg.exe (PID: 4020)
- StarPDF.exe (PID: 2656)
Check for Java to be installed
- iexplore.exe (PID: 2080)
Creates files in the Windows directory
- starzip_addpdf.exe (PID: 3828)
INFO
Application launched itself
- iexplore.exe (PID: 2080)
Changes internet zones settings
- iexplore.exe (PID: 2080)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | NSIS - Nullsoft Scriptable Install System (94.8) |
|---|---|---|
| .exe | | | Win32 Executable MS Visual C++ (generic) (3.4) |
| .dll | | | Win32 Dynamic Link Library (generic) (0.7) |
| .exe | | | Win32 Executable (generic) (0.5) |
| .exe | | | Generic Win/DOS Executable (0.2) |
EXIF
EXE
| Subsystem: | Windows GUI |
|---|---|
| SubsystemVersion: | 4 |
| ImageVersion: | 6 |
| OSVersion: | 4 |
| EntryPoint: | 0x30fa |
| UninitializedDataSize: | 1024 |
| InitializedDataSize: | 164864 |
| CodeSize: | 24064 |
| LinkerVersion: | 6 |
| PEType: | PE32 |
| TimeStamp: | 2009:12:05 23:50:52+01:00 |
| MachineType: | Intel 386 or later, and compatibles |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 05-Dec-2009 22:50:52 |
| Detected languages: |
|
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: | 0x000000D8 |
PE Headers
| Signature: | PE |
|---|---|
| Machine: | IMAGE_FILE_MACHINE_I386 |
| Number of sections: | 5 |
| Time date stamp: | 05-Dec-2009 22:50:52 |
| Pointer to Symbol Table: | 0x00000000 |
| Number of symbols: | 0 |
| Size of Optional Header: | 0x00E0 |
| Characteristics: |
|
Sections
Name | Virtual Address | Virtual Size | Raw Size | Charateristics | Entropy |
|---|---|---|---|---|---|
.text | 0x00001000 | 0x00005C4C | 0x00005E00 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 6.44011 |
.rdata | 0x00007000 | 0x0000129C | 0x00001400 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 5.04684 |
.data | 0x00009000 | 0x00025C58 | 0x00000400 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 4.801 |
.ndata | 0x0002F000 | 0x00016000 | 0x00000000 | IMAGE_SCN_CNT_UNINITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 0 |
.rsrc | 0x00045000 | 0x00004F50 | 0x00005000 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 5.51326 |
Resources
Title | Entropy | Size | Codepage | Language | Type |
|---|---|---|---|---|---|
1 | 5.10394 | 533 | UNKNOWN | English - United States | RT_MANIFEST |
2 | 5.66564 | 4264 | UNKNOWN | English - United States | RT_ICON |
3 | 5.504 | 2440 | UNKNOWN | English - United States | RT_ICON |
4 | 5.41454 | 1128 | UNKNOWN | English - United States | RT_ICON |
102 | 2.67292 | 164 | UNKNOWN | English - United States | RT_DIALOG |
103 | 2.62308 | 62 | UNKNOWN | English - United States | RT_GROUP_ICON |
105 | 2.70466 | 498 | UNKNOWN | English - United States | RT_DIALOG |
106 | 2.89949 | 232 | UNKNOWN | English - United States | RT_DIALOG |
107 | 2.46405 | 144 | UNKNOWN | English - United States | RT_DIALOG |
111 | 2.96394 | 222 | UNKNOWN | English - United States | RT_DIALOG |
Imports
ADVAPI32.dll |
COMCTL32.dll |
GDI32.dll |
KERNEL32.dll |
SHELL32.dll |
USER32.dll |
VERSION.dll |
ole32.dll |
Total processes
56
Monitored processes
14
Malicious processes
5
Suspicious processes
2
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process |
|---|---|---|---|---|
| 332 | "C:\Users\admin\AppData\Local\Temp\starpdf_home.exe" | C:\Users\admin\AppData\Local\Temp\starpdf_home.exe | — | explorer.exe |
User: admin Integrity Level: MEDIUM Exit code: 3221226540 | ||||
| 4064 | "C:\Users\admin\AppData\Local\Temp\starpdf_home.exe" | C:\Users\admin\AppData\Local\Temp\starpdf_home.exe | explorer.exe | |
User: admin Integrity Level: HIGH Exit code: 0 | ||||
| 3832 | "C:\Program Files\STARtools\StarPDF\startools_addpdf.exe" /S | C:\Program Files\STARtools\StarPDF\startools_addpdf.exe | starpdf_home.exe | |
User: admin Integrity Level: HIGH Exit code: 0 | ||||
| 3720 | cmd /c \DelUS.bat | C:\Windows\system32\cmd.exe | — | startools_addpdf.exe |
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Windows Command Processor Exit code: 1 Version: 6.1.7601.17514 (win7sp1_rtm.101119-1850) | ||||
| 2080 | "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding | C:\Program Files\Internet Explorer\iexplore.exe | svchost.exe | |
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Internet Explorer Exit code: 1 Version: 8.00.7600.16385 (win7_rtm.090713-1255) | ||||
| 2860 | "C:\Program Files\Internet Explorer\iexplore.exe" SCODEF:2080 CREDAT:79873 | C:\Program Files\Internet Explorer\iexplore.exe | — | iexplore.exe |
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Internet Explorer Exit code: 0 Version: 8.00.7600.16385 (win7_rtm.090713-1255) | ||||
| 2608 | "C:\Users\admin\AppData\Local\Temp\nsq7DD7.tmp\nsF6D1.tmp" schtasks /create /tn:"º°PDF¾÷µ¥ÀÌÆ® ½ÇÇà" /xml "C:\Users\admin\AppData\Local\Temp\test_saved.xml" | C:\Users\admin\AppData\Local\Temp\nsq7DD7.tmp\nsF6D1.tmp | — | starpdf_home.exe |
User: admin Integrity Level: HIGH Exit code: 0 | ||||
| 4056 | schtasks /create /tn:"º°PDF¾÷µ¥ÀÌÆ® ½ÇÇà" /xml "C:\Users\admin\AppData\Local\Temp\test_saved.xml" | C:\Windows\system32\schtasks.exe | — | nsF6D1.tmp |
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Manages scheduled tasks Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) | ||||
| 3828 | "C:\Users\admin\AppData\Roaming\Microsoft\Windows\Templates\starzip_addpdf.exe" startoolszip=zip | C:\Users\admin\AppData\Roaming\Microsoft\Windows\Templates\starzip_addpdf.exe | starpdf_home.exe | |
User: admin Integrity Level: HIGH Exit code: 0 | ||||
| 4020 | "C:\Program Files\STARtools\StarZip\starzipextchg.exe" inst "C:\Program Files\STARtools\StarZip\StarZip.exe" | C:\Program Files\STARtools\StarZip\starzipextchg.exe | — | starzip_addpdf.exe |
User: admin Integrity Level: HIGH Exit code: 0 | ||||
Total events
1 981
Read events
1 056
Write events
0
Delete events
0
Modification events
Executable files
88
Suspicious files
5
Text files
52
Unknown types
20
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 4064 | starpdf_home.exe | C:\Users\admin\AppData\Local\Temp\nsq7DD7.tmp\processes_second.dll | executable | |
MD5:F0A1EAE66DD2F54FBE26C26DB5493A6F | SHA256:8FE4DAD8F894BCDB9A83A9D302907DE404695BE4B50E619AFD88F09D72583E69 | |||
| 4064 | starpdf_home.exe | C:\Users\admin\AppData\Local\Temp\nsq7DD7.tmp\nsDialogs.dll | executable | |
MD5:F2C993A0C726386D72E4640967CEF83E | SHA256:6739A2C8075CC383620A867E983957DE0B4AE9EF0453BAADD1469132893D7301 | |||
| 4064 | starpdf_home.exe | C:\Program Files\STARtools\StarPDF\startools_addpdf.exe | executable | |
MD5:45A6F40A022665FE22EE81AF1C20711D | SHA256:80FD7260BB39B28C0DCD12CB895AC59C4A0591178920CC961224875CBA0D5D7B | |||
| 3832 | startools_addpdf.exe | C:\Users\admin\AppData\Local\Temp\nsgD761.tmp\KillProcDLL.dll | executable | |
MD5:6958016193A066833556992077BAD4FE | SHA256:F38C669C87F2A73768A27A01622690997E9D93D5CA3830B349BD24C3FF9F8D2E | |||
| 4064 | starpdf_home.exe | C:\Users\admin\AppData\Local\Temp\nsq7DD7.tmp\DLLWaitForKillProgram.dll | executable | |
MD5:9C4B8EC42D89F7557BFD90798CE52787 | SHA256:ED52BDAD7B383A179B9B0E21FEFDDA2D72695C5263A815D5E1E0BFAC6C718548 | |||
| 3832 | startools_addpdf.exe | C:\Users\admin\AppData\Local\Temp\nsgD761.tmp\DLLWaitForKillProgram.dll | executable | |
MD5:9C4B8EC42D89F7557BFD90798CE52787 | SHA256:ED52BDAD7B383A179B9B0E21FEFDDA2D72695C5263A815D5E1E0BFAC6C718548 | |||
| 4064 | starpdf_home.exe | C:\Program Files\STARtools\StarPDF\starpdfup.exe | executable | |
MD5:928E070B0A63D7463E44CBD7F43C1D77 | SHA256:F10457C2CDAE62F89808B9622C92563009C5BAF999ED908838047850DC5383B0 | |||
| 4064 | starpdf_home.exe | C:\Program Files\STARtools\StarPDF\lex\ssceam2.clx | binary | |
MD5:5206C227DA12EFA894A848BAD1DF63DD | SHA256:ECE32C754B853D050C44CDE244914893437BFBDC2F60F9BB8AFBBF3815834804 | |||
| 4064 | starpdf_home.exe | C:\Users\admin\AppData\Local\Temp\nsq7DD7.tmp\modern-wizard.bmp | image | |
MD5:E40E9BD181F06655B74014AD5A2F87C8 | SHA256:E4FB143E483BE55FEEE43752DA00AB7637135DFC58BB06AA5059D38BA058E4D9 | |||
| 4064 | starpdf_home.exe | C:\Program Files\STARtools\StarPDF\lex\sscebr2.clx | binary | |
MD5:139169A0427893F518A107BD33EF5FD0 | SHA256:55C74679775106D836CF47FA3AAAB48482CADA960857728C4DABE0AFE9F0EF74 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
9
TCP/UDP connections
9
DNS requests
6
Threats
0
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
3828 | starzip_addpdf.exe | GET | 200 | 114.108.160.134:80 | http://nac.startools.co.kr/home/starzip/inst_nor.php?pid=addpdf | KR | — | — | suspicious |
4064 | starpdf_home.exe | GET | 200 | 114.108.160.211:80 | http://update.startools.co.kr/update_2011/starpdf/getday.php | KR | text | 8 b | malicious |
3828 | starzip_addpdf.exe | GET | 200 | 114.108.160.211:80 | http://update.startools.co.kr/update_2011/starzip/getday.php | KR | text | 8 b | malicious |
3832 | startools_addpdf.exe | GET | 200 | 114.108.160.134:80 | http://log.adsence.co.kr/logexp.php?aid=startoolsup&kind=inst&pid=starpdf | KR | text | 4 b | suspicious |
4064 | starpdf_home.exe | GET | 200 | 114.108.160.134:80 | http://nac.startools.co.kr/home/starpdf/inst_nor.php?pid=home | KR | — | — | suspicious |
3828 | starzip_addpdf.exe | GET | 200 | 114.108.160.134:80 | http://log.adsence.co.kr/logexp.php?aid=starzip&kind=inst&pid=addpdf | KR | text | 4 b | suspicious |
4064 | starpdf_home.exe | GET | 200 | 210.112.11.142:80 | http://down.startools.co.kr/starpdf/app/add_simfile/starzip_addpdf.exe | KR | executable | 6.21 Mb | malicious |
2080 | iexplore.exe | GET | 200 | 204.79.197.200:80 | http://www.bing.com/favicon.ico | US | image | 237 b | whitelisted |
4064 | starpdf_home.exe | GET | 200 | 114.108.160.134:80 | http://log.adsence.co.kr/logexp.php?aid=starpdf&kind=inst&pid=home | KR | text | 4 b | suspicious |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
2080 | iexplore.exe | 204.79.197.200:80 | www.bing.com | Microsoft Corporation | US | whitelisted |
3828 | starzip_addpdf.exe | 114.108.160.211:80 | update.startools.co.kr | LG DACOM Corporation | KR | malicious |
4064 | starpdf_home.exe | 114.108.160.211:80 | update.startools.co.kr | LG DACOM Corporation | KR | malicious |
3832 | startools_addpdf.exe | 114.108.160.134:80 | log.adsence.co.kr | LG DACOM Corporation | KR | unknown |
4064 | starpdf_home.exe | 210.112.11.142:80 | down.startools.co.kr | Sejong Telecom | KR | suspicious |
3828 | starzip_addpdf.exe | 114.108.160.134:80 | log.adsence.co.kr | LG DACOM Corporation | KR | unknown |
4064 | starpdf_home.exe | 114.108.160.134:80 | log.adsence.co.kr | LG DACOM Corporation | KR | unknown |
DNS requests
Domain | IP | Reputation |
|---|---|---|
update.startools.co.kr |
| malicious |
www.bing.com |
| whitelisted |
log.adsence.co.kr |
| unknown |
down.startools.co.kr |
| malicious |
nac.startools.co.kr |
| unknown |
down.ezoneclick.com |
| malicious |
Threats
PID | Process | Class | Message |
|---|---|---|---|
4064 | starpdf_home.exe | A Network Trojan was detected | ET MALWARE User-Agent (webcount) |
4064 | starpdf_home.exe | Potential Corporate Privacy Violation | ET POLICY PE EXE or DLL Windows file download HTTP |
3828 | starzip_addpdf.exe | A Network Trojan was detected | ET MALWARE User-Agent (webcount) |
Process | Message |
|---|---|
StarPDF.exe | Load C:\Program Files\STARtools\StarPDF\plugins\npStarPDFReaderPlug.dll is failed ,The plugin dll version is large than Reader.
|
StarPDF.exe | Load C:\Program Files\STARtools\StarPDF\plugins\StarPDFReaderX.dll is failed ,The plugin dll version is large than Reader.
|