f73fccc50cda7bc1f80239ec7c5bfaffdca7b62db4623c65944db32c938eefa9

Analysis

max time kernel
114s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
27-11-2022 02:55

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General

Target

ͬļ--豸/1.¼3 ŵ飨3_ر.xls
Size

96KB
MD5

73d92c3deade678d26fe9945f46ab864
SHA1

302d28a84dfcfb4a083d0cf5af916d514fbdb58f
SHA256

c78a75a2c2909fb4fe63767308fff176d80af3ae3037677271a36aea382a85c5
SHA512

8d926a517c6395b03bfee51a7fdda9b25c7be497b2cb99a77752bd56735e93fde3a4eed2d727c2f7e68e047d9c001f6a499a8067aa9d6e53ef316c99c9f47951
SSDEEP

3072:Wd1gxv7yZmspH7+cclKisPI4ukoRWGN6WVbrzQ7ITkFIBAww33XjUJtXwm:S1gxv7yZmspH7+cclKisPI4ukoRWGNc+

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	3036	4736	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4624	4736	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4552	4736	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\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	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

4736 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE
4736	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 4736 wrote to memory of 4576	4736	EXCEL.EXE	splwow64.exe
PID 4736 wrote to memory of 4576	4736	EXCEL.EXE	splwow64.exe
PID 4736 wrote to memory of 3036	4736	EXCEL.EXE	cmd.exe
PID 4736 wrote to memory of 3036	4736	EXCEL.EXE	cmd.exe
PID 4736 wrote to memory of 4624	4736	EXCEL.EXE	cmd.exe
PID 4736 wrote to memory of 4624	4736	EXCEL.EXE	cmd.exe
PID 4736 wrote to memory of 4552	4736	EXCEL.EXE	cmd.exe
PID 4736 wrote to memory of 4552	4736	EXCEL.EXE	cmd.exe
PID 3036 wrote to memory of 4404	3036	cmd.exe	attrib.exe
PID 3036 wrote to memory of 4404	3036	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

4404 attrib.exe

pid	process
4404	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\ͬļ--豸\1.¼3 ŵ飨3_ر.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4736

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:4576

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:3036

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:4404

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:4552

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
1⤵
PID:3816

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/3036-140-0x0000000000000000-mapping.dmp

Download
memory/4404-143-0x0000000000000000-mapping.dmp

Download
memory/4552-142-0x0000000000000000-mapping.dmp

Download
memory/4576-139-0x0000000000000000-mapping.dmp

Download
memory/4624-141-0x0000000000000000-mapping.dmp

Download
memory/4736-136-0x00007FFFBFE70000-0x00007FFFBFE80000-memory.dmp

Filesize
64KB

Download
memory/4736-138-0x00007FFFBD930000-0x00007FFFBD940000-memory.dmp

Filesize
64KB

Download
memory/4736-137-0x00007FFFBD930000-0x00007FFFBD940000-memory.dmp

Filesize
64KB

Download
memory/4736-132-0x00007FFFBFE70000-0x00007FFFBFE80000-memory.dmp

Filesize
64KB

Download
memory/4736-135-0x00007FFFBFE70000-0x00007FFFBFE80000-memory.dmp

Filesize
64KB

Download
memory/4736-134-0x00007FFFBFE70000-0x00007FFFBFE80000-memory.dmp

Filesize
64KB

Download
memory/4736-133-0x00007FFFBFE70000-0x00007FFFBFE80000-memory.dmp

Filesize
64KB

Download
memory/4736-145-0x00007FFFBFE70000-0x00007FFFBFE80000-memory.dmp

Filesize
64KB

Download
memory/4736-146-0x00007FFFBFE70000-0x00007FFFBFE80000-memory.dmp

Filesize
64KB

Download
memory/4736-147-0x00007FFFBFE70000-0x00007FFFBFE80000-memory.dmp

Filesize
64KB

Download
memory/4736-148-0x00007FFFBFE70000-0x00007FFFBFE80000-memory.dmp

Filesize
64KB

Download