45dc9013197a06c850ec744b62752731f43e8be34a0333e47206a77482046571

Analysis

max time kernel
166s
max time network
177s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
26-11-2022 03:10

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General

Target

45dc9013197a06c850ec744b62752731f43e8be34a0333e47206a77482046571.xls
Size

137KB
MD5

3ad1cb077fb9f185f4c3fab46866959a
SHA1

80f2befef95a4dc0adfccecb5d954b6b9d6d5424
SHA256

45dc9013197a06c850ec744b62752731f43e8be34a0333e47206a77482046571
SHA512

33b16b0b640a86f614e7c2ab85202f227be0ee4b1ac8e644f7d230caf14bea1a570e261f1a1dbd724cf0a5318f5c8368a6f47f3d4df214ea8c8bf34183f071b7
SSDEEP

3072:IwZGG/qpcYkylWVbrzQ7ITkGt6yDWBQn6KNL7:cWYytb

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	4304	4792	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3736	4792	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3656	4792	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

4792 EXCEL.EXE

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

EXCEL.EXE

pid	process
4792	EXCEL.EXE
4792	EXCEL.EXE
4792	EXCEL.EXE
4792	EXCEL.EXE
4792	EXCEL.EXE
4792	EXCEL.EXE
4792	EXCEL.EXE
4792	EXCEL.EXE
4792	EXCEL.EXE
4792	EXCEL.EXE
4792	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 4792 wrote to memory of 4304	4792	EXCEL.EXE	cmd.exe
PID 4792 wrote to memory of 4304	4792	EXCEL.EXE	cmd.exe
PID 4792 wrote to memory of 3736	4792	EXCEL.EXE	cmd.exe
PID 4792 wrote to memory of 3736	4792	EXCEL.EXE	cmd.exe
PID 4792 wrote to memory of 3656	4792	EXCEL.EXE	cmd.exe
PID 4792 wrote to memory of 3656	4792	EXCEL.EXE	cmd.exe
PID 4304 wrote to memory of 3460	4304	cmd.exe	attrib.exe
PID 4304 wrote to memory of 3460	4304	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

3460 attrib.exe

pid	process
3460	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\45dc9013197a06c850ec744b62752731f43e8be34a0333e47206a77482046571.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4792

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:4304

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:3460

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:3736

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:3656

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\f8eacb010247445dad97462f1c9c5b31 /t 4752 /p 4792
1⤵
PID:4400

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/3460-142-0x0000000000000000-mapping.dmp

Download
memory/3656-141-0x0000000000000000-mapping.dmp

Download
memory/3736-140-0x0000000000000000-mapping.dmp

Download
memory/4304-139-0x0000000000000000-mapping.dmp

Download
memory/4792-132-0x00007FFFBCD90000-0x00007FFFBCDA0000-memory.dmp

Filesize
64KB

Download
memory/4792-133-0x00007FFFBCD90000-0x00007FFFBCDA0000-memory.dmp

Filesize
64KB

Download
memory/4792-134-0x00007FFFBCD90000-0x00007FFFBCDA0000-memory.dmp

Filesize
64KB

Download
memory/4792-135-0x00007FFFBCD90000-0x00007FFFBCDA0000-memory.dmp

Filesize
64KB

Download
memory/4792-136-0x00007FFFBCD90000-0x00007FFFBCDA0000-memory.dmp

Filesize
64KB

Download
memory/4792-137-0x00007FFFBAAF0000-0x00007FFFBAB00000-memory.dmp

Filesize
64KB

Download
memory/4792-138-0x00007FFFBAAF0000-0x00007FFFBAB00000-memory.dmp

Filesize
64KB

Download