| File name: | symsrv.bin |
| Full analysis: | https://app.any.run/tasks/0cfea90b-b7ed-4a6e-8dd4-abae9694caf1 |
| Verdict: | Malicious activity |
| Analysis date: | March 02, 2020, 12:19:47 |
| OS: | Windows 7 Professional Service Pack 1 (build: 7601, 32 bit) |
| Indicators: | |
| MIME: | application/x-dosexec |
| File info: | PE32 executable (DLL) (GUI) Intel 80386, for MS Windows, UPX compressed |
| MD5: | 7574CF2C64F35161AB1292E2F532AABF |
| SHA1: | 14BA3FA927A06224DFE587014299E834DEF4644F |
| SHA256: | DE055A89DE246E629A8694BDE18AF2B1605E4B9B493C7E4AEF669DD67ACF5085 |
| SSDEEP: | 1536:YjV8y93KQpFQmPLRk7G50zy/riF12jvRyo0hQk7ZL:c8y93KQjy7G55riF1cMo03V |
MALICIOUS
Loads dropped or rewritten executable
- WerFault.exe (PID: 4084)
Changes AppInit_DLLs value (autorun option)
- rundll32.exe (PID: 2192)
Changes the autorun value in the registry
- rundll32.exe (PID: 2192)
SUSPICIOUS
No suspicious indicators.INFO
Loads main object executable
- rundll32.exe (PID: 2192)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | UPX compressed Win32 Executable (39.3) |
|---|---|---|
| .exe | | | Win32 EXE Yoda's Crypter (38.6) |
| .dll | | | Win32 Dynamic Link Library (generic) (9.5) |
| .exe | | | Win32 Executable (generic) (6.5) |
| .exe | | | Generic Win/DOS Executable (2.9) |
EXIF
EXE
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 2012:12:06 18:32:32+01:00 |
| PEType: | PE32 |
| LinkerVersion: | 6 |
| CodeSize: | 61440 |
| InitializedDataSize: | 4096 |
| UninitializedDataSize: | 126976 |
| EntryPoint: | 0x2df80 |
| OSVersion: | 4 |
| ImageVersion: | - |
| SubsystemVersion: | 4 |
| Subsystem: | Windows GUI |
| FileVersionNumber: | 5.1.2600.5512 |
| ProductVersionNumber: | 5.1.2600.5512 |
| FileFlagsMask: | 0x003f |
| FileFlags: | (none) |
| FileOS: | Windows NT 32-bit |
| ObjectFileType: | Dynamic link library |
| FileSubtype: | - |
| LanguageCode: | English (U.S.) |
| CharacterSet: | Unicode |
| Comments: | - |
| CompanyName: | Microsoft Corporation |
| FileDescription: | LanguagePack |
| FileVersion: | 5, 1, 2600, 5512 |
| InternalName: | LanguagePack |
| LegalCopyright: | (C) Microsoft Corporation. All rights reserved. |
| LegalTrademarks: | - |
| OriginalFileName: | LanguagePack |
| PrivateBuild: | - |
| ProductName: | Microsoft(C) Windows(C) Operating System |
| ProductVersion: | 5, 1, 2600, 5512 |
| SpecialBuild: | - |
Summary
| Architecture: | IMAGE_FILE_MACHINE_I386 |
|---|---|
| Subsystem: | IMAGE_SUBSYSTEM_WINDOWS_GUI |
| Compilation Date: | 06-Dec-2012 17:32:32 |
| Detected languages: |
|
| Comments: | - |
| CompanyName: | Microsoft Corporation |
| FileDescription: | LanguagePack |
| FileVersion: | 5, 1, 2600, 5512 |
| InternalName: | LanguagePack |
| LegalCopyright: | (C) Microsoft Corporation. All rights reserved. |
| LegalTrademarks: | - |
| OriginalFilename: | LanguagePack |
| PrivateBuild: | - |
| ProductName: | Microsoft(C) Windows(C) Operating System |
| ProductVersion: | 5, 1, 2600, 5512 |
| SpecialBuild: | - |
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: | 0x000000F8 |
PE Headers
| Signature: | PE |
|---|---|
| Machine: | IMAGE_FILE_MACHINE_I386 |
| Number of sections: | 3 |
| Time date stamp: | 06-Dec-2012 17:32:32 |
| 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 |
|---|---|---|---|---|---|
UPX0 | 0x00001000 | 0x0001F000 | 0x00000000 | IMAGE_SCN_CNT_UNINITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 0 |
UPX1 | 0x00020000 | 0x0000F000 | 0x0000E200 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 7.91386 |
.rsrc | 0x0002F000 | 0x00001000 | 0x00000600 | IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE | 3.74492 |
Resources
Title | Entropy | Size | Codepage | Language | Type |
|---|---|---|---|---|---|
1 | 3.47123 | 1008 | UNKNOWN | Chinese - PRC | RT_VERSION |
Imports
ADVAPI32.dll |
KERNEL32.DLL |
USER32.dll |
Exports
Title | Ordinal | Address |
|---|---|---|
FloodFix | 4 | 0x0000D48B |
FloodFix2 | 5 | 0x0000D728 |
crc32 | 6 | 0x0000165D |
Total processes
38
Monitored processes
2
Malicious processes
1
Suspicious processes
1
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2192 | "C:\Windows\System32\rundll32.exe" "C:\Users\admin\AppData\Local\Temp\symsrv.bin.exe", FloodFix | C:\Windows\System32\rundll32.exe | explorer.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows host process (Rundll32) Exit code: 3221225477 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
| 4084 | C:\Windows\system32\WerFault.exe -u -p 2192 -s 236 | C:\Windows\system32\WerFault.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Problem Reporting Exit code: 0 Version: 6.1.7600.16385 (win7_rtm.090713-1255) Modules
| |||||||||||||||
Total events
15
Read events
12
Write events
3
Delete events
0
Modification events
| (PID) Process: | (2192) rundll32.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows |
| Operation: | write | Name: | AppInit_DLLs |
Value: C:\Users\admin\AppData\Local\Temp\SYMSRV~1.EXE | |||
| (PID) Process: | (2192) rundll32.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows |
| Operation: | write | Name: | LoadAppInit_DLLs |
Value: 1 | |||
| (PID) Process: | (2192) rundll32.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows |
| Operation: | write | Name: | RequireSignedAppInit_DLLs |
Value: 0 | |||
Executable files
0
Suspicious files
1
Text files
0
Unknown types
1
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 4084 | WerFault.exe | C:\Users\admin\AppData\Local\CrashDumps\rundll32.exe.2192.dmp | dmp | |
MD5:— | SHA256:— | |||
| 4084 | WerFault.exe | C:\Users\admin\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_rundll32.exe_sym_cebad8b87e962e267fc28c9919f4537a2df0cac4_0f5285e2\Report.wer | binary | |
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