1e2b9a87d5700baa554e1ea505583b3171383afb51abd29b1c58a5b5ca0e24d0

General

Target

英语.xls
Size

137KB
MD5

3ad1cb077fb9f185f4c3fab46866959a
SHA1

80f2befef95a4dc0adfccecb5d954b6b9d6d5424
SHA256

45dc9013197a06c850ec744b62752731f43e8be34a0333e47206a77482046571
SHA512

33b16b0b640a86f614e7c2ab85202f227be0ee4b1ac8e644f7d230caf14bea1a570e261f1a1dbd724cf0a5318f5c8368a6f47f3d4df214ea8c8bf34183f071b7
SSDEEP

3072:IwZGG/qpcYkylWVbrzQ7ITkGt6yDWBQn6KNL7:cWYytb

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	2372	4848	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2152	4848	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2244	4848	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 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	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

NTFS ADS 1 IoCs

Processes:

EXCEL.EXE

description ioc process

File created C:\Users\Admin\AppData\Local\Temp\2E175E00\:Zone.Identifier:$DATA EXCEL.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

4848 EXCEL.EXE

description	ioc	process
File created	C:\Users\Admin\AppData\Local\Temp\2E175E00\:Zone.Identifier:$DATA	EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE
4848	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 4848 wrote to memory of 2372	4848	EXCEL.EXE	cmd.exe
PID 4848 wrote to memory of 2372	4848	EXCEL.EXE	cmd.exe
PID 4848 wrote to memory of 2244	4848	EXCEL.EXE	cmd.exe
PID 4848 wrote to memory of 2244	4848	EXCEL.EXE	cmd.exe
PID 4848 wrote to memory of 2152	4848	EXCEL.EXE	cmd.exe
PID 4848 wrote to memory of 2152	4848	EXCEL.EXE	cmd.exe
PID 2372 wrote to memory of 1708	2372	cmd.exe	attrib.exe
PID 2372 wrote to memory of 1708	2372	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

1708 attrib.exe

pid	process
1708	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\英语.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- NTFS ADS
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4848

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:2372

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:1708

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:2152

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:2244

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Privilege Escalation

Defense Evasion

Hidden Files and Directories

1

T1158

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1708-142-0x0000000000000000-mapping.dmp

Download
memory/2152-141-0x0000000000000000-mapping.dmp

Download
memory/2244-140-0x0000000000000000-mapping.dmp

Download
memory/2372-139-0x0000000000000000-mapping.dmp

Download
memory/4848-135-0x00007FFA31DD0000-0x00007FFA31DE0000-memory.dmp

Filesize
64KB

Download
memory/4848-137-0x00007FFA2FA60000-0x00007FFA2FA70000-memory.dmp

Filesize
64KB

Download
memory/4848-138-0x00007FFA2FA60000-0x00007FFA2FA70000-memory.dmp

Filesize
64KB

Download
memory/4848-136-0x00007FFA31DD0000-0x00007FFA31DE0000-memory.dmp

Filesize
64KB

Download
memory/4848-132-0x00007FFA31DD0000-0x00007FFA31DE0000-memory.dmp

Filesize
64KB

Download
memory/4848-134-0x00007FFA31DD0000-0x00007FFA31DE0000-memory.dmp

Filesize
64KB

Download
memory/4848-133-0x00007FFA31DD0000-0x00007FFA31DE0000-memory.dmp

Filesize
64KB

Download
memory/4848-144-0x00007FFA31DD0000-0x00007FFA31DE0000-memory.dmp

Filesize
64KB

Download
memory/4848-145-0x00007FFA31DD0000-0x00007FFA31DE0000-memory.dmp

Filesize
64KB

Download
memory/4848-146-0x00007FFA31DD0000-0x00007FFA31DE0000-memory.dmp

Filesize
64KB

Download
memory/4848-147-0x00007FFA31DD0000-0x00007FFA31DE0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads