b4c0672704891c561e9af948430d71c8fb1719ee5d130e26143df577f53ce406

Analysis

max time kernel
157s
max time network
187s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
05/12/2022, 14:20

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General

Target

b4c0672704891c561e9af948430d71c8fb1719ee5d130e26143df577f53ce406.xls
Size

36KB
MD5

5f5609ad898d0df50d8a97c273bb63aa
SHA1

e2c62906409344a63fbe539576bad789733aba4f
SHA256

b4c0672704891c561e9af948430d71c8fb1719ee5d130e26143df577f53ce406
SHA512

7163be300200036f4148132cacc85649f4ced3058afedfd07622372dd3e49f31be4fb0e35c5e9e9d476edb43efe4aa7892ebd84a7106a79a82d0ee4c55f002f0
SSDEEP

768:6///I12wzlFl/sEMeapuONmjDpP1VAqbhxmaR22vFItmd8aYNiKydp5VbRuUr8vq:6///I12wzlFl/sEMeapuONmjDpP1VAqz

Score

6^/10

Malware Config

Signatures

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.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2220	4524	DW20.EXE	80

Checks processor information in registry 2 TTPs 6 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

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
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dwwin.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dwwin.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dwwin.exe

Enumerates system info in registry 2 TTPs 5 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dwwin.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dwwin.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4524	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE

Suspicious use of SetWindowsHookEx 17 IoCs

pid	Process
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE
4524	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4524 wrote to memory of 3276	4524	EXCEL.EXE	85
PID 4524 wrote to memory of 3276	4524	EXCEL.EXE	85
PID 4524 wrote to memory of 2220	4524	EXCEL.EXE	88
PID 4524 wrote to memory of 2220	4524	EXCEL.EXE	88
PID 2220 wrote to memory of 2964	2220	DW20.EXE	89
PID 2220 wrote to memory of 2964	2220	DW20.EXE	89

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\b4c0672704891c561e9af948430d71c8fb1719ee5d130e26143df577f53ce406.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4524
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:3276
- 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 4696
  2⤵
  - Process spawned suspicious child process
  - Suspicious use of WriteProcessMemory
  PID:2220
- - C:\Windows\system32\dwwin.exe
    C:\Windows\system32\dwwin.exe -x -s 4696
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    PID:2964

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
1⤵
PID:1184

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 460 -p 4524 -ip 4524
1⤵
PID:4248

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4524-132-0x00007FFB4B6D0000-0x00007FFB4B6E0000-memory.dmp

Filesize
64KB

Download
memory/4524-133-0x00007FFB4B6D0000-0x00007FFB4B6E0000-memory.dmp

Filesize
64KB

Download
memory/4524-134-0x00007FFB4B6D0000-0x00007FFB4B6E0000-memory.dmp

Filesize
64KB

Download
memory/4524-135-0x00007FFB4B6D0000-0x00007FFB4B6E0000-memory.dmp

Filesize
64KB

Download
memory/4524-136-0x00007FFB4B6D0000-0x00007FFB4B6E0000-memory.dmp

Filesize
64KB

Download
memory/4524-137-0x00007FFB49200000-0x00007FFB49210000-memory.dmp

Filesize
64KB

Download
memory/4524-138-0x00007FFB49200000-0x00007FFB49210000-memory.dmp

Filesize
64KB

Download