0a77c980c1b6ad85ffb3f1e8e814f96e09d5033d82dce7ca2062b992372c85e6

Analysis

max time kernel
149s
max time network
201s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
25-11-2022 19:26

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General

Target

答辩16日第5组.xls
Size

91KB
MD5

b058cb31647157b7580b0c437ecac2ef
SHA1

a4abd2d31aadf839a19cb2ab8a79d98991bee167
SHA256

6dd3bb33c666e7c81be63e218f26c88f77eee70a65524ff37c148c4da3573362
SHA512

d5f017d960e71d453fe55255d72eb5d031b945e7eafabd0d6c75179059f6f7c17020fcebfca2ada982ee761b04824061526468fba37ea5361aaeb5ae41e4aaa3
SSDEEP

1536:yiiiG4ebPv9WVHrzQ7ITkcKo62lGM88SdJtXw9x2dqRE:GWVHrzQ7ITkqtjIJtXw72dqRE

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 3 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

cmd.execmd.execmd.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	944	1048	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2208	1048	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2964	1048	cmd.exe	EXCEL.EXE

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1048 EXCEL.EXE

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

EXCEL.EXE

pid	process
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 1048 wrote to memory of 944	1048	EXCEL.EXE	cmd.exe
PID 1048 wrote to memory of 944	1048	EXCEL.EXE	cmd.exe
PID 1048 wrote to memory of 2208	1048	EXCEL.EXE	cmd.exe
PID 1048 wrote to memory of 2208	1048	EXCEL.EXE	cmd.exe
PID 1048 wrote to memory of 2964	1048	EXCEL.EXE	cmd.exe
PID 1048 wrote to memory of 2964	1048	EXCEL.EXE	cmd.exe
PID 944 wrote to memory of 4640	944	cmd.exe	attrib.exe
PID 944 wrote to memory of 4640	944	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

4640 attrib.exe

pid	process
4640	attrib.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\答辩16日第5组.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1048

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:944

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:4640

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c Del /F /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
2⤵
- Process spawned unexpected child process
PID:2208

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c RD /S /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
2⤵
- Process spawned unexpected child process
PID:2964

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\9618367122994cfe81c9c03f1401d497 /t 2992 /p 1048
1⤵
PID:4600

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/944-139-0x0000000000000000-mapping.dmp

Download
memory/1048-132-0x00007FFA74D70000-0x00007FFA74D80000-memory.dmp

Filesize
64KB

Download
memory/1048-134-0x00007FFA74D70000-0x00007FFA74D80000-memory.dmp

Filesize
64KB

Download
memory/1048-133-0x00007FFA74D70000-0x00007FFA74D80000-memory.dmp

Filesize
64KB

Download
memory/1048-135-0x00007FFA74D70000-0x00007FFA74D80000-memory.dmp

Filesize
64KB

Download
memory/1048-136-0x00007FFA74D70000-0x00007FFA74D80000-memory.dmp

Filesize
64KB

Download
memory/1048-137-0x00007FFA72D10000-0x00007FFA72D20000-memory.dmp

Filesize
64KB

Download
memory/1048-138-0x00007FFA72D10000-0x00007FFA72D20000-memory.dmp

Filesize
64KB

Download
memory/2208-140-0x0000000000000000-mapping.dmp

Download
memory/2964-141-0x0000000000000000-mapping.dmp

Download
memory/4640-142-0x0000000000000000-mapping.dmp

Download