d6392b1904c96acaf30b5d03dc12fab67a47e373bb1c4daf604e05cc668d411e

Analysis

max time kernel
152s
max time network
180s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2022 21:42

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General

Target

d6392b1904c96acaf30b5d03dc12fab67a47e373bb1c4daf604e05cc668d411e.xls
Size

252KB
MD5

0aa5bdf430dfe3128a02cb11e4cfe86f
SHA1

a348c380dc7362694bdc713baf3af41a9122a92e
SHA256

d6392b1904c96acaf30b5d03dc12fab67a47e373bb1c4daf604e05cc668d411e
SHA512

de425b4b574c6c9ba264f44c471720f3dc1c63cba2e329875b16e31185cc07a2a44d1c8bc9dbedc06eba5fc18389231bdd2c4db9a08c6327336dd4534fe72acb
SSDEEP

3072:4zKj/FwBN4gI1XVFJGLBrWVbrz4yR37ITkZEFfX1qiSAk:RzRGNtyRs1g

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	2632	4772	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4640	4772	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	904	4772	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

4772 EXCEL.EXE
Suspicious use of SetWindowsHookEx 9 IoCs

Processes:

EXCEL.EXE

pid process

4772 EXCEL.EXE
4772 EXCEL.EXE
4772 EXCEL.EXE
4772 EXCEL.EXE
4772 EXCEL.EXE
4772 EXCEL.EXE
4772 EXCEL.EXE
4772 EXCEL.EXE
4772 EXCEL.EXE

pid	process
4772	EXCEL.EXE

pid	process
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE
4772	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 4772 wrote to memory of 2632	4772	EXCEL.EXE	cmd.exe
PID 4772 wrote to memory of 2632	4772	EXCEL.EXE	cmd.exe
PID 4772 wrote to memory of 4640	4772	EXCEL.EXE	cmd.exe
PID 4772 wrote to memory of 4640	4772	EXCEL.EXE	cmd.exe
PID 4772 wrote to memory of 904	4772	EXCEL.EXE	cmd.exe
PID 4772 wrote to memory of 904	4772	EXCEL.EXE	cmd.exe
PID 2632 wrote to memory of 4912	2632	cmd.exe	attrib.exe
PID 2632 wrote to memory of 4912	2632	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

4912 attrib.exe

pid	process
4912	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\d6392b1904c96acaf30b5d03dc12fab67a47e373bb1c4daf604e05cc668d411e.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4772

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:2632

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:4912

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:4640

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:904

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/904-141-0x0000000000000000-mapping.dmp

Download
memory/2632-139-0x0000000000000000-mapping.dmp

Download
memory/4640-140-0x0000000000000000-mapping.dmp

Download
memory/4772-132-0x00007FFA74D70000-0x00007FFA74D80000-memory.dmp

Filesize
64KB

Download
memory/4772-133-0x00007FFA74D70000-0x00007FFA74D80000-memory.dmp

Filesize
64KB

Download
memory/4772-134-0x00007FFA74D70000-0x00007FFA74D80000-memory.dmp

Filesize
64KB

Download
memory/4772-135-0x00007FFA74D70000-0x00007FFA74D80000-memory.dmp

Filesize
64KB

Download
memory/4772-136-0x00007FFA74D70000-0x00007FFA74D80000-memory.dmp

Filesize
64KB

Download
memory/4772-137-0x00007FFA72D10000-0x00007FFA72D20000-memory.dmp

Filesize
64KB

Download
memory/4772-138-0x00007FFA72D10000-0x00007FFA72D20000-memory.dmp

Filesize
64KB

Download
memory/4772-143-0x000001EF33221000-0x000001EF33223000-memory.dmp

Filesize
8KB

Download
memory/4912-142-0x0000000000000000-mapping.dmp

Download