| File name: | iertutil.dll |
| Full analysis: | https://app.any.run/tasks/93a26c7c-f919-4db8-8e63-729776176afc |
| Verdict: | Malicious activity |
| Threats: | Stealers are a group of malicious software that are intended for gaining unauthorized access to users’ information and transferring it to the attacker. The stealer malware category includes various types of programs that focus on their particular kind of data, including files, passwords, and cryptocurrency. Stealers are capable of spying on their targets by recording their keystrokes and taking screenshots. This type of malware is primarily distributed as part of phishing campaigns. |
| Analysis date: | October 24, 2020, 09:51:50 |
| OS: | Windows 7 Professional Service Pack 1 (build: 7601, 32 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-dosexec |
| File info: | PE32 executable (DLL) (GUI) Intel 80386, for MS Windows |
| MD5: | 3ADC4B283447BCFAEF67FD8841732873 |
| SHA1: | 22824152F0A9F56151186E4548D198336D8AA0B2 |
| SHA256: | D33C8C283B12704188013DA89A629F2B51FD4727C0BEB4AAE73B668C3025DBC7 |
| SSDEEP: | 12288:YAVZRHPDlQSAQI7rbStEISByBRBWNBl86CfcOTBQ+7+xBDwdk4o7QVuwL:YQDlQ/QmatNENU/fI+MKdqA |
MALICIOUS
Changes the autorun value in the registry
- rundll32.exe (PID: 2960)
Stealing of credential data
- rundll32.exe (PID: 2960)
Uses SVCHOST.EXE for hidden code execution
- rundll32.exe (PID: 2960)
SUSPICIOUS
Creates files in the user directory
- rundll32.exe (PID: 2960)
- cmd.exe (PID: 2840)
- svchost.exe (PID: 752)
Executable content was dropped or overwritten
- rundll32.exe (PID: 2960)
Uses IPCONFIG.EXE to discover IP address
- cmd.exe (PID: 2840)
Starts CMD.EXE for commands execution
- rundll32.exe (PID: 2960)
Uses TASKKILL.EXE to kill process
- cmd.exe (PID: 3592)
Uses SYSTEMINFO.EXE to read environment
- cmd.exe (PID: 2560)
Uses TASKLIST.EXE to query information about running processes
- cmd.exe (PID: 3472)
INFO
Loads main object executable
- rundll32.exe (PID: 2960)
Dropped object may contain Bitcoin addresses
- rundll32.exe (PID: 2960)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
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: | 2020:10:22 05:50:37+02:00 |
| PEType: | PE32 |
| LinkerVersion: | 14 |
| CodeSize: | 133120 |
| InitializedDataSize: | 309248 |
| UninitializedDataSize: | - |
| EntryPoint: | 0xb6131 |
| OSVersion: | 6 |
| ImageVersion: | - |
| SubsystemVersion: | 6 |
| Subsystem: | Windows GUI |
| FileVersionNumber: | 11.0.10240.16391 |
| ProductVersionNumber: | 11.0.10240.16391 |
| FileFlagsMask: | 0x003f |
| FileFlags: | (none) |
| FileOS: | Windows NT 32-bit |
| ObjectFileType: | Dynamic link library |
| FileSubtype: | - |
| LanguageCode: | English (U.S.) |
| CharacterSet: | Unicode |
| CompanyName: | Microsoft Corporation |
| FileDescription: | Run time utility for Internet Explorer |
| FileVersion: | 11.00.10240.16391 (th1_st1.150715-1728) |
| InternalName: | IeRtUtil.dll |
| LegalCopyright: | Microsoft Corporation. All rights reserved. |
| OriginalFileName: | IeRtUtil.dll |
| ProductName: | Internet Explorer |
| ProductVersion: | 11.00.10240.16391 |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 22-Oct-2020 03:50:37 |
| Detected languages: |
|
| CompanyName: | Microsoft Corporation |
| FileDescription: | Run time utility for Internet Explorer |
| FileVersion: | 11.00.10240.16391 (th1_st1.150715-1728) |
| InternalName: | IeRtUtil.dll |
| LegalCopyright: | Microsoft Corporation. All rights reserved. |
| OriginalFilename: | IeRtUtil.dll |
| ProductName: | Internet Explorer |
| ProductVersion: | 11.00.10240.16391 |
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: | 0x00000140 |
PE Headers
| Signature: | PE |
|---|---|
| Machine: | IMAGE_FILE_MACHINE_I386 |
| Number of sections: | 9 |
| Time date stamp: | 22-Oct-2020 03:50:37 |
| 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 | 0x0002068A | 0x00020800 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 6.6729 |
.rdata | 0x00022000 | 0x0000939A | 0x00009400 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 5.62239 |
.data | 0x0002C000 | 0x00002D98 | 0x00001E00 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 2.6863 |
.gfids | 0x0002F000 | 0x00000120 | 0x00000200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 2.29954 |
.tls | 0x00030000 | 0x00000009 | 0x00000200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 0.0203931 |
.JBIN0 | 0x00031000 | 0x0007A985 | 0x0007AA00 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ | 4.65586 |
.JBIN1 | 0x000AC000 | 0x0000C7CC | 0x0000C800 | IMAGE_SCN_CNT_CODE, IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 7.82195 |
.reloc | 0x000B9000 | 0x00001AF8 | 0x00001C00 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 6.41663 |
.rsrc | 0x000BB000 | 0x0003D785 | 0x0003D800 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ | 7.99767 |
Resources
Title | Entropy | Size | Codepage | Language | Type |
|---|---|---|---|---|---|
1 | 3.50435 | 920 | UNKNOWN | English - United States | RT_VERSION |
2 | 4.91161 | 381 | UNKNOWN | English - United States | RT_MANIFEST |
180 | 7.99917 | 250240 | UNKNOWN | English - United States | BIN |
Imports
ADVAPI32.dll |
KERNEL32.dll |
SHELL32.dll |
SHLWAPI.dll |
USER32.dll |
ole32.dll |
Exports
Title | Ordinal | Address |
|---|---|---|
Run | 1 | 0x0000A0A0 |
Total processes
50
Monitored processes
11
Malicious processes
1
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 752 | "C:\Windows\system32\svchost.exe" | C:\Windows\system32\svchost.exe | — | rundll32.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Host Process for Windows Services Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 952 | tasklist | C:\Windows\system32\tasklist.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Lists the current running tasks Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 1116 | arp -a | C:\Windows\system32\ARP.EXE | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: TCP/IP Arp Command Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 2560 | cmd.exe /c systeminfo >>"C:\Users\admin\AppData\Roaming\Microsoft\pubs\PI_001.dat" | C:\Windows\System32\cmd.exe | — | rundll32.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Command Processor Exit code: 0 Version: 6.1.7601.17514 (win7sp1_rtm.101119-1850) Modules
| |||||||||||||||
| 2840 | cmd.exe /c ipconfig/all >>"C:\Users\admin\AppData\Roaming\Microsoft\pubs\PI_001.dat" & arp -a >>"C:\Users\admin\AppData\Roaming\Microsoft\pubs\PI_001.dat" | C:\Windows\System32\cmd.exe | — | rundll32.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Command Processor Exit code: 0 Version: 6.1.7601.17514 (win7sp1_rtm.101119-1850) Modules
| |||||||||||||||
| 2960 | "C:\Windows\System32\rundll32.exe" "C:\Users\admin\AppData\Local\Temp\iertutil.dll.exe", Run | 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
| |||||||||||||||
| 3148 | systeminfo | C:\Windows\system32\systeminfo.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Displays system information Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 3336 | ipconfig /all | C:\Windows\system32\ipconfig.exe | — | cmd.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: IP Configuration Utility Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 3472 | cmd.exe /c tasklist >>"C:\Users\admin\AppData\Roaming\Microsoft\pubs\PI_001.dat" | C:\Windows\System32\cmd.exe | — | rundll32.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Command Processor Exit code: 0 Version: 6.1.7601.17514 (win7sp1_rtm.101119-1850) Modules
| |||||||||||||||
| 3592 | cmd.exe /c taskkill /f /im daumcleaner.exe | C:\Windows\System32\cmd.exe | — | rundll32.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Command Processor Exit code: 128 Version: 6.1.7601.17514 (win7sp1_rtm.101119-1850) Modules
| |||||||||||||||
Total events
49
Read events
45
Write events
4
Delete events
0
Modification events
| (PID) Process: | (2960) rundll32.exe | Key: | HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run |
| Operation: | write | Name: | schedule |
Value: rundll32.exe "C:\Users\admin\AppData\Roaming\Microsoft\exts\iertutil.dll" Run | |||
| (PID) Process: | (3148) systeminfo.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\13B\52C64B7E |
| Operation: | write | Name: | LanguageList |
Value: en-US | |||
| (PID) Process: | (3148) systeminfo.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\MuiCache\13B\52C64B7E |
| Operation: | write | Name: | @%SystemRoot%\system32\mlang.dll,-4386 |
Value: English (United States) | |||
Executable files
1
Suspicious files
3
Text files
4
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 2560 | cmd.exe | C:\Users\admin\AppData\Roaming\Microsoft\pubs\PI_001.dat | text | |
MD5:— | SHA256:— | |||
| 752 | svchost.exe | C:\Users\admin\AppData\Roaming\Microsoft\pubs\tader.wav | binary | |
MD5:— | SHA256:— | |||
| 3472 | cmd.exe | C:\Users\admin\AppData\Roaming\Microsoft\pubs\PI_001.dat | text | |
MD5:— | SHA256:— | |||
| 2960 | rundll32.exe | C:\Users\admin\AppData\Roaming\Microsoft\exts\iertutil.dll | executable | |
MD5:— | SHA256:— | |||
| 2960 | rundll32.exe | C:\Users\admin\AppData\Roaming\Microsoft\pubs\PI_000.dat | binary | |
MD5:— | SHA256:— | |||
| 2840 | cmd.exe | C:\Users\admin\AppData\Roaming\Microsoft\pubs\PI_001.dat | text | |
MD5:— | SHA256:— | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
0
DNS requests
0
Threats
0
HTTP requests
Download PCAP, analyze network streams, HTTP content and a lot more at the full report