dcb68b8fe7cbba08c7ea48ebb66494668da72fff9b8bf1d693138b8d7809657e

Analysis

max time kernel
203s
max time network
232s
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 12:21

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General

Target

dcb68b8fe7cbba08c7ea48ebb66494668da72fff9b8bf1d693138b8d7809657e.xls
Size

106KB
MD5

31b08c99d7e8d6ca1bfdc06e2a87a17f
SHA1

e3da1eceab782c6a10cc2e5a9ca87f1625e3454c
SHA256

dcb68b8fe7cbba08c7ea48ebb66494668da72fff9b8bf1d693138b8d7809657e
SHA512

f2539a651531832b30efd048f881c0e86a60e98a050a17b565c359381762b47d33c97227c32ac1c5451b1293e07cde3de44099f0616f30abeb3d44f2deb09c9c
SSDEEP

1536:Q44440N4D59FjutbhImP8OIzoWVbrzQhhrITkiD2EuO/WwF1J8+vM2M/M7HT:rTILuWVbrzQLrITkD3M/U5kDT

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	4940	4000	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1404	4000	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2432	4000	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

4000 EXCEL.EXE
Suspicious use of SetWindowsHookEx 9 IoCs

Processes:

EXCEL.EXE

pid process

4000 EXCEL.EXE
4000 EXCEL.EXE
4000 EXCEL.EXE
4000 EXCEL.EXE
4000 EXCEL.EXE
4000 EXCEL.EXE
4000 EXCEL.EXE
4000 EXCEL.EXE
4000 EXCEL.EXE

pid	process
4000	EXCEL.EXE

pid	process
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE
4000	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 4000 wrote to memory of 4940	4000	EXCEL.EXE	cmd.exe
PID 4000 wrote to memory of 4940	4000	EXCEL.EXE	cmd.exe
PID 4000 wrote to memory of 1404	4000	EXCEL.EXE	cmd.exe
PID 4000 wrote to memory of 1404	4000	EXCEL.EXE	cmd.exe
PID 4000 wrote to memory of 2432	4000	EXCEL.EXE	cmd.exe
PID 4000 wrote to memory of 2432	4000	EXCEL.EXE	cmd.exe
PID 4940 wrote to memory of 4552	4940	cmd.exe	attrib.exe
PID 4940 wrote to memory of 4552	4940	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

4552 attrib.exe

pid	process
4552	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\dcb68b8fe7cbba08c7ea48ebb66494668da72fff9b8bf1d693138b8d7809657e.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4000

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:4940

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:4552

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:1404

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:2432

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/1404-140-0x0000000000000000-mapping.dmp

Download
memory/2432-141-0x0000000000000000-mapping.dmp

Download
memory/4000-132-0x00007FFC784B0000-0x00007FFC784C0000-memory.dmp

Filesize
64KB

Download
memory/4000-133-0x00007FFC784B0000-0x00007FFC784C0000-memory.dmp

Filesize
64KB

Download
memory/4000-134-0x00007FFC784B0000-0x00007FFC784C0000-memory.dmp

Filesize
64KB

Download
memory/4000-135-0x00007FFC784B0000-0x00007FFC784C0000-memory.dmp

Filesize
64KB

Download
memory/4000-136-0x00007FFC784B0000-0x00007FFC784C0000-memory.dmp

Filesize
64KB

Download
memory/4000-137-0x00007FFC762F0000-0x00007FFC76300000-memory.dmp

Filesize
64KB

Download
memory/4000-138-0x00007FFC762F0000-0x00007FFC76300000-memory.dmp

Filesize
64KB

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

Download
memory/4940-139-0x0000000000000000-mapping.dmp

Download