fb4ff88dd49b4b72942ff43884d8c30d82aa4b1f4978f472787cd08808598764

Analysis

max time kernel
158s
max time network
198s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
28-11-2022 12:44

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General

Target

fb4ff88dd49b4b72942ff43884d8c30d82aa4b1f4978f472787cd08808598764.xls
Size

86KB
MD5

551fe7ec7c022b14e4db803fbd6b1118
SHA1

cf329a44ca576e5b79c6a2df6bcbe0c05bb97a32
SHA256

fb4ff88dd49b4b72942ff43884d8c30d82aa4b1f4978f472787cd08808598764
SHA512

84637ba5081e896f891c8da75bfb11c4ff812664b6bf7202856c468fa721d26bbe7e8c46257097bb4829f9c1fa19ce5885d578d6674624de812e88d494126696
SSDEEP

1536:5AAAsAU52lXbjSytC2BhYS6D8UYtQ41gxv7yZmspH7+cclKiEZClsUI4ukoRWGNF:eT1gxv7yZmspH7+cclKisUI4ukoRWGNF

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	384	2892	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2256	2892	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4732	2892	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

2892 EXCEL.EXE

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

EXCEL.EXE

pid	process
2892	EXCEL.EXE
2892	EXCEL.EXE
2892	EXCEL.EXE
2892	EXCEL.EXE
2892	EXCEL.EXE
2892	EXCEL.EXE
2892	EXCEL.EXE
2892	EXCEL.EXE
2892	EXCEL.EXE
2892	EXCEL.EXE
2892	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 2892 wrote to memory of 384	2892	EXCEL.EXE	cmd.exe
PID 2892 wrote to memory of 384	2892	EXCEL.EXE	cmd.exe
PID 2892 wrote to memory of 2256	2892	EXCEL.EXE	cmd.exe
PID 2892 wrote to memory of 2256	2892	EXCEL.EXE	cmd.exe
PID 2892 wrote to memory of 4732	2892	EXCEL.EXE	cmd.exe
PID 2892 wrote to memory of 4732	2892	EXCEL.EXE	cmd.exe
PID 384 wrote to memory of 3536	384	cmd.exe	attrib.exe
PID 384 wrote to memory of 3536	384	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

3536 attrib.exe

pid	process
3536	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\fb4ff88dd49b4b72942ff43884d8c30d82aa4b1f4978f472787cd08808598764.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2892

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:384

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:3536

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:2256

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:4732

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\9d172d4b65f34fc5b76f7619a6c8561c /t 2908 /p 2892
1⤵
PID:4560

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/384-139-0x0000000000000000-mapping.dmp

Download
memory/2256-140-0x0000000000000000-mapping.dmp

Download
memory/2892-132-0x00007FFA91030000-0x00007FFA91040000-memory.dmp

Filesize
64KB

Download
memory/2892-133-0x00007FFA91030000-0x00007FFA91040000-memory.dmp

Filesize
64KB

Download
memory/2892-134-0x00007FFA91030000-0x00007FFA91040000-memory.dmp

Filesize
64KB

Download
memory/2892-135-0x00007FFA91030000-0x00007FFA91040000-memory.dmp

Filesize
64KB

Download
memory/2892-136-0x00007FFA91030000-0x00007FFA91040000-memory.dmp

Filesize
64KB

Download
memory/2892-137-0x00007FFA8EFD0000-0x00007FFA8EFE0000-memory.dmp

Filesize
64KB

Download
memory/2892-138-0x00007FFA8EFD0000-0x00007FFA8EFE0000-memory.dmp

Filesize
64KB

Download
memory/3536-142-0x0000000000000000-mapping.dmp

Download
memory/4732-141-0x0000000000000000-mapping.dmp

Download