83aaf79ba8cb78ba77a7ad2b96e276e1d7bc731d734987c8acdfa6db40eea318

General

Target

invoicel_25336.xls
Size

166KB
MD5

122e863c8d959fdb586a6a4ca09e6cb1
SHA1

ab5d42a9f39bfedf3e9f27972757dfe943b1893d
SHA256

83aaf79ba8cb78ba77a7ad2b96e276e1d7bc731d734987c8acdfa6db40eea318
SHA512

9e6915a0bb565f306904574d7177fa611372eb0ef04add6e4557ee64a6e8fc6539371abc803b28e8c7b8fa08bb7c1f47f24592c9495a1d556dc89065f17a0846

Score

6^/10

Malware Config

Signatures

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 use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
720	EXCEL.EXE
720	EXCEL.EXE
720	EXCEL.EXE
720	EXCEL.EXE
720	EXCEL.EXE
720	EXCEL.EXE
720	EXCEL.EXE
720	EXCEL.EXE
720	EXCEL.EXE
720	EXCEL.EXE
720	EXCEL.EXE
720	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

720 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

720 EXCEL.EXE
720 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

EXCEL.EXEdwwin.exe

pid process

720 EXCEL.EXE
720 EXCEL.EXE
936 dwwin.exe
936 dwwin.exe

Process spawned suspicious child process 1 IoCs

This child process is typically not spawned unless (for example) the parent process crashes. This typically indicates the parent process was unsuccessfully compromised.

Processes:

DW20.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	3388	720	DW20.EXE	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXEDW20.EXE

description	pid	process	target process
PID 720 wrote to memory of 3388	720	EXCEL.EXE	DW20.EXE
PID 720 wrote to memory of 3388	720	EXCEL.EXE	DW20.EXE
PID 3388 wrote to memory of 936	3388	DW20.EXE	dwwin.exe
PID 3388 wrote to memory of 936	3388	DW20.EXE	dwwin.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\invoicel_25336.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of SetWindowsHookEx
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:720

C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\DW20.EXE
"C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\DW20.EXE" -x -s 4452
2⤵
- Process spawned suspicious child process
- Suspicious use of WriteProcessMemory
PID:3388

C:\Windows\system32\dwwin.exe
C:\Windows\system32\dwwin.exe -x -s 4452
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:936

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/936-1-0x0000000000000000-mapping.dmp

Download
memory/936-2-0x000001855CC70000-0x000001855CC71000-memory.dmp

Filesize
4KB

Download
memory/936-3-0x000001855CC70000-0x000001855CC71000-memory.dmp

Filesize
4KB

Download
memory/936-5-0x000001855D3B0000-0x000001855D3B1000-memory.dmp

Filesize
4KB

Download
memory/936-8-0x000001855D3B0000-0x000001855D3B1000-memory.dmp

Filesize
4KB

Download
memory/936-9-0x000001855D6C0000-0x000001855D6C1000-memory.dmp

Filesize
4KB

Download
memory/936-10-0x000001855D6C0000-0x000001855D6C1000-memory.dmp

Filesize
4KB

Download
memory/936-11-0x000001855D6C0000-0x000001855D6C1000-memory.dmp

Filesize
4KB

Download
memory/936-12-0x000001855D2F0000-0x000001855D2F1000-memory.dmp

Filesize
4KB

Download
memory/3388-0-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads