4f86706094fda2128d60a6021e2f4f0268793c1d2deeb9f23e608b06b0e9179f

Analysis

max time kernel
147s
max time network
219s
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

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

90KB
MD5

50c67f1f59e912b12ce0715bc6a05a88
SHA1

6f98084fce105bd661345c244cd4c3d0e24bb5af
SHA256

a1bf1157d9a6a3b98da4aa678a85ab31ef5c29ea0ee708dd8ded86d41c3e8430
SHA512

e5d79e6b53ab7df690c846699706328098e6bfba6e31f23b62300b3a4e24d939b949f37ce5303b3cf2e03659b3803b911886e37fe5ea1776b37ac63887965cc8
SSDEEP

1536:dBuuuO6HmVnLziCdymRxoiKTMEGw1gxv7yZmspH7+cclKiEZClsQ6NqTBun5oBNS:djw1gxv7yZmspH7+cclKisQ6NqTBun59

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	2812	1276	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4676	1276	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3792	1276	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

1276 EXCEL.EXE

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

EXCEL.EXE

pid	process
1276	EXCEL.EXE
1276	EXCEL.EXE
1276	EXCEL.EXE
1276	EXCEL.EXE
1276	EXCEL.EXE
1276	EXCEL.EXE
1276	EXCEL.EXE
1276	EXCEL.EXE
1276	EXCEL.EXE
1276	EXCEL.EXE
1276	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 1276 wrote to memory of 2812	1276	EXCEL.EXE	cmd.exe
PID 1276 wrote to memory of 2812	1276	EXCEL.EXE	cmd.exe
PID 1276 wrote to memory of 3792	1276	EXCEL.EXE	cmd.exe
PID 1276 wrote to memory of 3792	1276	EXCEL.EXE	cmd.exe
PID 1276 wrote to memory of 4676	1276	EXCEL.EXE	cmd.exe
PID 1276 wrote to memory of 4676	1276	EXCEL.EXE	cmd.exe
PID 2812 wrote to memory of 3984	2812	cmd.exe	attrib.exe
PID 2812 wrote to memory of 3984	2812	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

3984 attrib.exe

pid	process
3984	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\\ֱͶӰ��.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1276

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:2812

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:3984

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:4676

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:3792

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\d0329167e2b04cd28f153dfaf2844f66 /t 1808 /p 1276
1⤵
PID:4580

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/1276-132-0x00007FFA56390000-0x00007FFA563A0000-memory.dmp

Filesize
64KB

Download
memory/1276-133-0x00007FFA56390000-0x00007FFA563A0000-memory.dmp

Filesize
64KB

Download
memory/1276-134-0x00007FFA56390000-0x00007FFA563A0000-memory.dmp

Filesize
64KB

Download
memory/1276-135-0x00007FFA56390000-0x00007FFA563A0000-memory.dmp

Filesize
64KB

Download
memory/1276-136-0x00007FFA56390000-0x00007FFA563A0000-memory.dmp

Filesize
64KB

Download
memory/1276-137-0x00007FFA542A0000-0x00007FFA542B0000-memory.dmp

Filesize
64KB

Download
memory/1276-138-0x00007FFA542A0000-0x00007FFA542B0000-memory.dmp

Filesize
64KB

Download
memory/2812-139-0x0000000000000000-mapping.dmp

Download
memory/3792-140-0x0000000000000000-mapping.dmp

Download
memory/3984-142-0x0000000000000000-mapping.dmp

Download
memory/4676-141-0x0000000000000000-mapping.dmp

Download