b808daf0c156bc4e8c0031156d9c4aa223ee03b275ff3bf640d7f7e8bddcf665

Analysis

max time kernel
179s
max time network
191s
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 19:24

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General

Target

b808daf0c156bc4e8c0031156d9c4aa223ee03b275ff3bf640d7f7e8bddcf665.xls
Size

87KB
MD5

dbb489872d9750ab7369412cfdc47006
SHA1

bb949eba226a3ad414c424b35936487e741a2e70
SHA256

b808daf0c156bc4e8c0031156d9c4aa223ee03b275ff3bf640d7f7e8bddcf665
SHA512

a124d544ed7bd71fc1f5474a25264bdbfaf21d4c5f1c676417bb24443616134814790c51e0faf195d3fdf2a68f38e073cad9b064040efa8f205c3a7823da9566
SSDEEP

1536:LOOOzLf/JWOWS7RWVbrzQ7IT9vQx23S2XOX1kWPKN1:EWVbrzQ7ITR3F+X1kiu1

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	428	3428	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	8	3428	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	932	3428	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

3428 EXCEL.EXE

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

EXCEL.EXE

pid	process
3428	EXCEL.EXE
3428	EXCEL.EXE
3428	EXCEL.EXE
3428	EXCEL.EXE
3428	EXCEL.EXE
3428	EXCEL.EXE
3428	EXCEL.EXE
3428	EXCEL.EXE
3428	EXCEL.EXE
3428	EXCEL.EXE
3428	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 3428 wrote to memory of 428	3428	EXCEL.EXE	cmd.exe
PID 3428 wrote to memory of 428	3428	EXCEL.EXE	cmd.exe
PID 3428 wrote to memory of 8	3428	EXCEL.EXE	cmd.exe
PID 3428 wrote to memory of 8	3428	EXCEL.EXE	cmd.exe
PID 3428 wrote to memory of 932	3428	EXCEL.EXE	cmd.exe
PID 3428 wrote to memory of 932	3428	EXCEL.EXE	cmd.exe
PID 428 wrote to memory of 4720	428	cmd.exe	attrib.exe
PID 428 wrote to memory of 4720	428	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

4720 attrib.exe

pid	process
4720	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\b808daf0c156bc4e8c0031156d9c4aa223ee03b275ff3bf640d7f7e8bddcf665.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3428

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:428

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:4720

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:8

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:932

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\070913b6d73644d1a6ead4cfc7937540 /t 3376 /p 3428
1⤵
PID:2848

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/8-140-0x0000000000000000-mapping.dmp

Download
memory/428-139-0x0000000000000000-mapping.dmp

Download
memory/932-141-0x0000000000000000-mapping.dmp

Download
memory/3428-132-0x00007FFE8F650000-0x00007FFE8F660000-memory.dmp

Filesize
64KB

Download
memory/3428-133-0x00007FFE8F650000-0x00007FFE8F660000-memory.dmp

Filesize
64KB

Download
memory/3428-134-0x00007FFE8F650000-0x00007FFE8F660000-memory.dmp

Filesize
64KB

Download
memory/3428-135-0x00007FFE8F650000-0x00007FFE8F660000-memory.dmp

Filesize
64KB

Download
memory/3428-136-0x00007FFE8F650000-0x00007FFE8F660000-memory.dmp

Filesize
64KB

Download
memory/3428-137-0x00007FFE8CDA0000-0x00007FFE8CDB0000-memory.dmp

Filesize
64KB

Download
memory/3428-138-0x00007FFE8CDA0000-0x00007FFE8CDB0000-memory.dmp

Filesize
64KB

Download
memory/4720-142-0x0000000000000000-mapping.dmp

Download