0a77c980c1b6ad85ffb3f1e8e814f96e09d5033d82dce7ca2062b992372c85e6

Analysis

max time kernel
179s
max time network
204s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
25-11-2022 19:26

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General

Target

答辩16日第2组.xls
Size

92KB
MD5

d5b5f9a2bbcd1dace2067604967cecf9
SHA1

6dd5d8d7eb265aeba616ba0cf68f5e68cc408451
SHA256

a9bf187a58a7182f5b9b061e6df7cb4b1d08d97bc79184534cbcbd18c98429e8
SHA512

175ec07fb1d5ff3edea343501c9a7abf8e875d262f3ae6aacfb32368a51dc74a9def3f391f727bd19eff88b0ad4879f09ca1fffc3512d786b7c1e77a5cba47a0
SSDEEP

1536:izzzXha7HJzAWDbrzQ7ITkbIOLA23IM88S/JtXwgodJ:YWDbrzQ7ITkEERj2JtXwddJ

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	2132	1288	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4840	1288	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4748	1288	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

1288 EXCEL.EXE

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

EXCEL.EXE

pid	process
1288	EXCEL.EXE
1288	EXCEL.EXE
1288	EXCEL.EXE
1288	EXCEL.EXE
1288	EXCEL.EXE
1288	EXCEL.EXE
1288	EXCEL.EXE
1288	EXCEL.EXE
1288	EXCEL.EXE
1288	EXCEL.EXE
1288	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 1288 wrote to memory of 2132	1288	EXCEL.EXE	cmd.exe
PID 1288 wrote to memory of 2132	1288	EXCEL.EXE	cmd.exe
PID 1288 wrote to memory of 4748	1288	EXCEL.EXE	cmd.exe
PID 1288 wrote to memory of 4748	1288	EXCEL.EXE	cmd.exe
PID 1288 wrote to memory of 4840	1288	EXCEL.EXE	cmd.exe
PID 1288 wrote to memory of 4840	1288	EXCEL.EXE	cmd.exe
PID 2132 wrote to memory of 3432	2132	cmd.exe	attrib.exe
PID 2132 wrote to memory of 3432	2132	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

3432 attrib.exe

pid	process
3432	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\答辩16日第2组.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1288

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:2132

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:3432

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:4840

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:4748

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\da511750080c4c8bab938cd328f5ad96 /t 4928 /p 1288
1⤵
PID:3376

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/1288-132-0x00007FFD7C090000-0x00007FFD7C0A0000-memory.dmp

Filesize
64KB

Download
memory/1288-133-0x00007FFD7C090000-0x00007FFD7C0A0000-memory.dmp

Filesize
64KB

Download
memory/1288-134-0x00007FFD7C090000-0x00007FFD7C0A0000-memory.dmp

Filesize
64KB

Download
memory/1288-135-0x00007FFD7C090000-0x00007FFD7C0A0000-memory.dmp

Filesize
64KB

Download
memory/1288-136-0x00007FFD7C090000-0x00007FFD7C0A0000-memory.dmp

Filesize
64KB

Download
memory/1288-137-0x00007FFD79940000-0x00007FFD79950000-memory.dmp

Filesize
64KB

Download
memory/1288-138-0x00007FFD79940000-0x00007FFD79950000-memory.dmp

Filesize
64KB

Download
memory/2132-139-0x0000000000000000-mapping.dmp

Download
memory/3432-142-0x0000000000000000-mapping.dmp

Download
memory/4748-140-0x0000000000000000-mapping.dmp

Download
memory/4840-141-0x0000000000000000-mapping.dmp

Download