bc70e3e36cc5f2443fb95bbfb74c494001c2e0e8520ca4000bffe38772273ddd

General

Target

Complaint-Letter_2082718428_12042020.xls
Size

43KB
MD5

af743920f1c2a88671efd757f7eaa9b7
SHA1

d1743d50f044da581d99ffd7a81956c74262d896
SHA256

bc6bb3e5c68a9624544780f6f1a7b411b4a0906b7662110b38e7cfff280731c3
SHA512

69b6fcfabba261bea736c097d362ff8aa7255e71d0ec6a0c99624e4dd5033824fa6a279a10fcbbd6462e98b41d53df1ab3a94aea78dc0f1771786dffac504644

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.

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	3796	412	DW20.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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

412 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

EXCEL.EXEdwwin.exe

pid process

412 EXCEL.EXE
412 EXCEL.EXE
1532 dwwin.exe
1532 dwwin.exe
Suspicious use of SetWindowsHookEx 8 IoCs

Processes:

EXCEL.EXE

pid process

412 EXCEL.EXE
412 EXCEL.EXE
412 EXCEL.EXE
412 EXCEL.EXE
412 EXCEL.EXE
412 EXCEL.EXE
412 EXCEL.EXE
412 EXCEL.EXE

pid	process
412	EXCEL.EXE

pid	process
412	EXCEL.EXE
412	EXCEL.EXE
1532	dwwin.exe
1532	dwwin.exe

pid	process
412	EXCEL.EXE
412	EXCEL.EXE
412	EXCEL.EXE
412	EXCEL.EXE
412	EXCEL.EXE
412	EXCEL.EXE
412	EXCEL.EXE
412	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXEDW20.EXE

description	pid	process	target process
PID 412 wrote to memory of 3796	412	EXCEL.EXE	DW20.EXE
PID 412 wrote to memory of 3796	412	EXCEL.EXE	DW20.EXE
PID 3796 wrote to memory of 1532	3796	DW20.EXE	dwwin.exe
PID 3796 wrote to memory of 1532	3796	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\Complaint-Letter_2082718428_12042020.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:412

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 4492
2⤵
- Process spawned suspicious child process
- Suspicious use of WriteProcessMemory
PID:3796

C:\Windows\system32\dwwin.exe
C:\Windows\system32\dwwin.exe -x -s 4492
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:1532

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

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Downloads

memory/412-2-0x00007FF803100000-0x00007FF803737000-memory.dmp

Filesize
6.2MB

Download
memory/1532-4-0x0000000000000000-mapping.dmp

Download
memory/1532-5-0x0000021AD1E70000-0x0000021AD1E71000-memory.dmp

Filesize
4KB

Download
memory/1532-6-0x0000021AD1E70000-0x0000021AD1E71000-memory.dmp

Filesize
4KB

Download
memory/1532-8-0x0000021AD2630000-0x0000021AD2631000-memory.dmp

Filesize
4KB

Download
memory/1532-11-0x0000021AD2A30000-0x0000021AD2A31000-memory.dmp

Filesize
4KB

Download
memory/1532-13-0x0000021AD2A30000-0x0000021AD2A31000-memory.dmp

Filesize
4KB

Download
memory/1532-15-0x0000021AD2900000-0x0000021AD2901000-memory.dmp

Filesize
4KB

Download
memory/1532-16-0x0000021AD2900000-0x0000021AD2901000-memory.dmp

Filesize
4KB

Download
memory/1532-17-0x0000021AD2900000-0x0000021AD2901000-memory.dmp

Filesize
4KB

Download
memory/1532-18-0x0000021AD2570000-0x0000021AD2571000-memory.dmp

Filesize
4KB

Download
memory/3796-3-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads