ca088f7b8f3babefc521fd4f9cd5c423448ac48390e91495211a12dbbe8f9908

Analysis

max time kernel
143s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
26-11-2022 03:10

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General

Target

秦皇岛校区2011-2012-2学期补考安排/秦皇岛校区2011-2012-2学期不及格专业课程补考安排.xls
Size

282KB
MD5

46ceb6b45d64ecf1dc564a6477d92067
SHA1

5b27a3d6bf7e4f58da41fcd5a83a514cee6e6e0c
SHA256

664e2334cbfa8c113e4d6554823b5c5da936e3d695d1ac46c0026e836bfc75de
SHA512

b9853ec591cc366e4e27441f96d52b9b6ebd8b9f7846062c1b51e9f2e4de7bb620408e6a99923112e05d5e3f66695e45af6962d8e3057eb0d9222db54b8ffdeb
SSDEEP

3072:lfG+k5N8VZ8GDNsGb0QEIxpUAaKI8TKKC3quWeSrbM0hubjWvZc8ANsOCWVbrzgP:1Zxr/H2jWRxv+

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	1420	4412	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4264	4412	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4048	4412	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 opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	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

4412 EXCEL.EXE

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

EXCEL.EXE

pid	process
4412	EXCEL.EXE
4412	EXCEL.EXE
4412	EXCEL.EXE
4412	EXCEL.EXE
4412	EXCEL.EXE
4412	EXCEL.EXE
4412	EXCEL.EXE
4412	EXCEL.EXE
4412	EXCEL.EXE
4412	EXCEL.EXE
4412	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 4412 wrote to memory of 1420	4412	EXCEL.EXE	cmd.exe
PID 4412 wrote to memory of 1420	4412	EXCEL.EXE	cmd.exe
PID 4412 wrote to memory of 4264	4412	EXCEL.EXE	cmd.exe
PID 4412 wrote to memory of 4264	4412	EXCEL.EXE	cmd.exe
PID 4412 wrote to memory of 4048	4412	EXCEL.EXE	cmd.exe
PID 4412 wrote to memory of 4048	4412	EXCEL.EXE	cmd.exe
PID 1420 wrote to memory of 8	1420	cmd.exe	attrib.exe
PID 1420 wrote to memory of 8	1420	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

8 attrib.exe

pid	process
8	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\秦皇岛校区2011-2012-2学期补考安排\秦皇岛校区2011-2012-2学期不及格专业课程补考安排.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4412

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:1420

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:8

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:4264

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:4048

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/8-142-0x0000000000000000-mapping.dmp

Download
memory/1420-139-0x0000000000000000-mapping.dmp

Download
memory/4048-141-0x0000000000000000-mapping.dmp

Download
memory/4264-140-0x0000000000000000-mapping.dmp

Download
memory/4412-132-0x00007FFC3C1F0000-0x00007FFC3C200000-memory.dmp

Filesize
64KB

Download
memory/4412-134-0x00007FFC3C1F0000-0x00007FFC3C200000-memory.dmp

Filesize
64KB

Download
memory/4412-133-0x00007FFC3C1F0000-0x00007FFC3C200000-memory.dmp

Filesize
64KB

Download
memory/4412-135-0x00007FFC3C1F0000-0x00007FFC3C200000-memory.dmp

Filesize
64KB

Download
memory/4412-136-0x00007FFC3C1F0000-0x00007FFC3C200000-memory.dmp

Filesize
64KB

Download
memory/4412-137-0x00007FFC39FE0000-0x00007FFC39FF0000-memory.dmp

Filesize
64KB

Download
memory/4412-138-0x00007FFC39FE0000-0x00007FFC39FF0000-memory.dmp

Filesize
64KB

Download