91d0e2db5186b1bbb572b959915706234f25e01ab065c97a23986341cb4d77bf

Analysis

max time kernel
179s
max time network
214s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
26-11-2022 03:10

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General

Target

91d0e2db5186b1bbb572b959915706234f25e01ab065c97a23986341cb4d77bf.xls
Size

131KB
MD5

578ec83f00482a0eb6ef9ac7d335824a
SHA1

832f7ac4715fc88e203f2ef42d2e5511e2bf7bec
SHA256

91d0e2db5186b1bbb572b959915706234f25e01ab065c97a23986341cb4d77bf
SHA512

680480e8ae798fdf2bbc3a45a4bc30b858416d6440f01558ef7a261fe5ce073b0066d7f314e3d487a537cb61829f01965f7f95352d5e6af68f4f1e1548f51baf
SSDEEP

1536:wnnnjYiabhn9nhnrngvna3APUi5g0Ka0pNMWVbrzQSstITkbA23CozWWt2XKyISs:X30UX0Ka0pNMWVbrzQSstITkZ7yaPZ

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	796	5020	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4864	5020	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	800	5020	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

5020 EXCEL.EXE
Suspicious use of SetWindowsHookEx 9 IoCs

Processes:

EXCEL.EXE

pid process

5020 EXCEL.EXE
5020 EXCEL.EXE
5020 EXCEL.EXE
5020 EXCEL.EXE
5020 EXCEL.EXE
5020 EXCEL.EXE
5020 EXCEL.EXE
5020 EXCEL.EXE
5020 EXCEL.EXE

pid	process
5020	EXCEL.EXE

pid	process
5020	EXCEL.EXE
5020	EXCEL.EXE
5020	EXCEL.EXE
5020	EXCEL.EXE
5020	EXCEL.EXE
5020	EXCEL.EXE
5020	EXCEL.EXE
5020	EXCEL.EXE
5020	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 5020 wrote to memory of 796	5020	EXCEL.EXE	cmd.exe
PID 5020 wrote to memory of 796	5020	EXCEL.EXE	cmd.exe
PID 5020 wrote to memory of 4864	5020	EXCEL.EXE	cmd.exe
PID 5020 wrote to memory of 4864	5020	EXCEL.EXE	cmd.exe
PID 5020 wrote to memory of 800	5020	EXCEL.EXE	cmd.exe
PID 5020 wrote to memory of 800	5020	EXCEL.EXE	cmd.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\91d0e2db5186b1bbb572b959915706234f25e01ab065c97a23986341cb4d77bf.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5020

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
PID:796

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:4864

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:800

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\cc19ce52ec604ca6b71b2e6a64b03dd3 /t 2444 /p 5020
1⤵
PID:4624

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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/796-139-0x0000000000000000-mapping.dmp

Download
memory/800-141-0x0000000000000000-mapping.dmp

Download
memory/4864-140-0x0000000000000000-mapping.dmp

Download
memory/5020-132-0x00007FFD40710000-0x00007FFD40720000-memory.dmp

Filesize
64KB

Download
memory/5020-133-0x00007FFD40710000-0x00007FFD40720000-memory.dmp

Filesize
64KB

Download
memory/5020-134-0x00007FFD40710000-0x00007FFD40720000-memory.dmp

Filesize
64KB

Download
memory/5020-135-0x00007FFD40710000-0x00007FFD40720000-memory.dmp

Filesize
64KB

Download
memory/5020-136-0x00007FFD40710000-0x00007FFD40720000-memory.dmp

Filesize
64KB

Download
memory/5020-137-0x00007FFD3E6B0000-0x00007FFD3E6C0000-memory.dmp

Filesize
64KB

Download
memory/5020-138-0x00007FFD3E6B0000-0x00007FFD3E6C0000-memory.dmp

Filesize
64KB

Download