4f86706094fda2128d60a6021e2f4f0268793c1d2deeb9f23e608b06b0e9179f

Analysis

max time kernel
160s
max time network
180s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
25-11-2022 19:26

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General

Target

Ҵֱ20%ϵ//K4ܶ�.xls
Size

3.8MB
MD5

5034b373deecdf5033842f862fe84017
SHA1

1d6c5eca4e7c46c088469fb2467c156d1d4f01aa
SHA256

7e28d57e91aa0641833ae349b3fe7f7744b7e9b44f9c4b4d07b4beb6efad15e0
SHA512

b850379d21ec58b70e4a5d5d8f1efd3517b7a8692dbe6e3bc74e2109e6e7eea44ddf283424aa14a1215d972bfa1319f5d511bb16c3420f6f07640a64a8144425
SSDEEP

24576:Z/PeImtz+7l/XcHsIDUEEOCeZNIGb3tgjXBwcN62RViq5HSU6cHj0UiYiq15R4Zn:mztUL9/MEYl

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	3856	3068	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4624	3068	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2492	3068	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

3068 EXCEL.EXE

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

EXCEL.EXE

pid	process
3068	EXCEL.EXE
3068	EXCEL.EXE
3068	EXCEL.EXE
3068	EXCEL.EXE
3068	EXCEL.EXE
3068	EXCEL.EXE
3068	EXCEL.EXE
3068	EXCEL.EXE
3068	EXCEL.EXE
3068	EXCEL.EXE
3068	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 3068 wrote to memory of 1884	3068	EXCEL.EXE	splwow64.exe
PID 3068 wrote to memory of 1884	3068	EXCEL.EXE	splwow64.exe
PID 3068 wrote to memory of 3856	3068	EXCEL.EXE	cmd.exe
PID 3068 wrote to memory of 3856	3068	EXCEL.EXE	cmd.exe
PID 3068 wrote to memory of 4624	3068	EXCEL.EXE	cmd.exe
PID 3068 wrote to memory of 4624	3068	EXCEL.EXE	cmd.exe
PID 3068 wrote to memory of 2492	3068	EXCEL.EXE	cmd.exe
PID 3068 wrote to memory of 2492	3068	EXCEL.EXE	cmd.exe
PID 3856 wrote to memory of 1724	3856	cmd.exe	attrib.exe
PID 3856 wrote to memory of 1724	3856	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

1724 attrib.exe

pid	process
1724	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\Ҵֱ20%ϵ\\K4ܶ�.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3068

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:1884

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:3856

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:1724

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:4624

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:2492

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
1⤵
PID:5064

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\718b2f7dd0ec46a1bfb9961ff190eed1 /t 2688 /p 3068
1⤵
PID:3544

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/1724-145-0x0000000000000000-mapping.dmp

Download
memory/1884-140-0x0000000000000000-mapping.dmp

Download
memory/2492-144-0x0000000000000000-mapping.dmp

Download
memory/3068-139-0x00007FF8F9330000-0x00007FF8F9340000-memory.dmp

Filesize
64KB

Download
memory/3068-137-0x00007FF8FBB30000-0x00007FF8FBB40000-memory.dmp

Filesize
64KB

Download
memory/3068-138-0x00007FF8F9330000-0x00007FF8F9340000-memory.dmp

Filesize
64KB

Download
memory/3068-133-0x00007FF8FBB30000-0x00007FF8FBB40000-memory.dmp

Filesize
64KB

Download
memory/3068-136-0x00007FF8FBB30000-0x00007FF8FBB40000-memory.dmp

Filesize
64KB

Download
memory/3068-141-0x000002251A745000-0x000002251A747000-memory.dmp

Filesize
8KB

Download
memory/3068-134-0x00007FF8FBB30000-0x00007FF8FBB40000-memory.dmp

Filesize
64KB

Download
memory/3068-135-0x00007FF8FBB30000-0x00007FF8FBB40000-memory.dmp

Filesize
64KB

Download
memory/3068-146-0x000002251A745000-0x000002251A747000-memory.dmp

Filesize
8KB

Download
memory/3856-142-0x0000000000000000-mapping.dmp

Download
memory/4624-143-0x0000000000000000-mapping.dmp

Download