f73fccc50cda7bc1f80239ec7c5bfaffdca7b62db4623c65944db32c938eefa9

Analysis

max time kernel
152s
max time network
157s
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.¼2 ŵ飨2һŵ.xls
Size

93KB
MD5

f181d0c43690b68e13c78bfd30c729a5
SHA1

0205aad940ef3e5f35255035b59c3dd1ded9c76c
SHA256

e44d3a8b0d01423006b7b62214692b896318e71ca588fc575774ebbfd7355373
SHA512

488ecf4115d48218f4171e5ccd8ec9068351100142e1bbc307cf71eeea0ecaffb8ee4f20e920b237537dac7235dec1c1bafbbd89e5ee9eb5a2cdd5aeb141e435
SSDEEP

1536:HOOOO67Dy1SN12lXbjSytC2BhYS6D8YUYh1gxv7yZmspH7+cclKiEZClsPI4uko:yh1gxv7yZmspH7+cclKisPI4ukoRWGNY

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	3988	1124	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4984	1124	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3840	1124	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

1124 EXCEL.EXE

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

EXCEL.EXE

pid	process
1124	EXCEL.EXE
1124	EXCEL.EXE
1124	EXCEL.EXE
1124	EXCEL.EXE
1124	EXCEL.EXE
1124	EXCEL.EXE
1124	EXCEL.EXE
1124	EXCEL.EXE
1124	EXCEL.EXE
1124	EXCEL.EXE
1124	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 1124 wrote to memory of 3988	1124	EXCEL.EXE	cmd.exe
PID 1124 wrote to memory of 3988	1124	EXCEL.EXE	cmd.exe
PID 1124 wrote to memory of 4984	1124	EXCEL.EXE	cmd.exe
PID 1124 wrote to memory of 4984	1124	EXCEL.EXE	cmd.exe
PID 1124 wrote to memory of 3840	1124	EXCEL.EXE	cmd.exe
PID 1124 wrote to memory of 3840	1124	EXCEL.EXE	cmd.exe
PID 3988 wrote to memory of 1464	3988	cmd.exe	attrib.exe
PID 3988 wrote to memory of 1464	3988	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

1464 attrib.exe

pid	process
1464	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.¼2 ŵ飨2һŵ.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1124

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:3988

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:1464

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:4984

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:3840

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\750f91873aca4212b5f5b4f4e860cc61 /t 5096 /p 1124
1⤵
PID:2344

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/1124-132-0x00007FFF1ACB0000-0x00007FFF1ACC0000-memory.dmp

Filesize
64KB

Download
memory/1124-133-0x00007FFF1ACB0000-0x00007FFF1ACC0000-memory.dmp

Filesize
64KB

Download
memory/1124-134-0x00007FFF1ACB0000-0x00007FFF1ACC0000-memory.dmp

Filesize
64KB

Download
memory/1124-135-0x00007FFF1ACB0000-0x00007FFF1ACC0000-memory.dmp

Filesize
64KB

Download
memory/1124-136-0x00007FFF1ACB0000-0x00007FFF1ACC0000-memory.dmp

Filesize
64KB

Download
memory/1124-137-0x00007FFF18990000-0x00007FFF189A0000-memory.dmp

Filesize
64KB

Download
memory/1124-138-0x00007FFF18990000-0x00007FFF189A0000-memory.dmp

Filesize
64KB

Download
memory/1464-142-0x0000000000000000-mapping.dmp

Download
memory/3840-141-0x0000000000000000-mapping.dmp

Download
memory/3988-139-0x0000000000000000-mapping.dmp

Download
memory/4984-140-0x0000000000000000-mapping.dmp

Download