0a77c980c1b6ad85ffb3f1e8e814f96e09d5033d82dce7ca2062b992372c85e6

Analysis

max time kernel
101s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
25-11-2022 19:26

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General

Target

答辩16日第1组.xls
Size

89KB
MD5

e04396a6847dec1feed61fe3f75236d2
SHA1

ce29f6f112a69cf833af95d9ad5bb2828a073a8e
SHA256

b7bcd8b1615a74d01081f68a3ce030e71515f741fd824bbe579e822bde146c6e
SHA512

73a2a31b7dd80353d2606998ec4071a65ae3a149f22a7e0f313580526846abfd004795742817d09c2772a4a4b48e0753f54ce43f08d2873c53c21f159538851e
SSDEEP

1536:nzzzXhxslLTWVbrzQ7ISBnkR62lGM88ScJiXwc/dF:iWVbrzQ7I0k9tjhJiXwGdF

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	4792	4560	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4372	4560	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4464	4560	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

NTFS ADS 1 IoCs

Processes:

EXCEL.EXE

description ioc process

File created C:\Users\Admin\AppData\Local\Temp\E8F65E00\:Zone.Identifier:$DATA EXCEL.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

4560 EXCEL.EXE

description	ioc	process
File created	C:\Users\Admin\AppData\Local\Temp\E8F65E00\:Zone.Identifier:$DATA	EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE
4560	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 4560 wrote to memory of 4792	4560	EXCEL.EXE	cmd.exe
PID 4560 wrote to memory of 4792	4560	EXCEL.EXE	cmd.exe
PID 4560 wrote to memory of 4372	4560	EXCEL.EXE	cmd.exe
PID 4560 wrote to memory of 4372	4560	EXCEL.EXE	cmd.exe
PID 4560 wrote to memory of 4464	4560	EXCEL.EXE	cmd.exe
PID 4560 wrote to memory of 4464	4560	EXCEL.EXE	cmd.exe
PID 4792 wrote to memory of 2864	4792	cmd.exe	attrib.exe
PID 4792 wrote to memory of 2864	4792	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

2864 attrib.exe

pid	process
2864	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1组.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:4560

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:4792

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:2864

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:4372

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:4464

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/2864-156-0x0000000000000000-mapping.dmp

Download
memory/4372-152-0x0000000000000000-mapping.dmp

Download
memory/4464-153-0x0000000000000000-mapping.dmp

Download
memory/4560-138-0x00007FFC09650000-0x00007FFC09660000-memory.dmp

Filesize
64KB

Download
memory/4560-136-0x00007FFC0BFB0000-0x00007FFC0BFC0000-memory.dmp

Filesize
64KB

Download
memory/4560-137-0x00007FFC09650000-0x00007FFC09660000-memory.dmp

Filesize
64KB

Download
memory/4560-132-0x00007FFC0BFB0000-0x00007FFC0BFC0000-memory.dmp

Filesize
64KB

Download
memory/4560-135-0x00007FFC0BFB0000-0x00007FFC0BFC0000-memory.dmp

Filesize
64KB

Download
memory/4560-134-0x00007FFC0BFB0000-0x00007FFC0BFC0000-memory.dmp

Filesize
64KB

Download
memory/4560-133-0x00007FFC0BFB0000-0x00007FFC0BFC0000-memory.dmp

Filesize
64KB

Download
memory/4560-158-0x00007FFC0BFB0000-0x00007FFC0BFC0000-memory.dmp

Filesize
64KB

Download
memory/4560-159-0x00007FFC0BFB0000-0x00007FFC0BFC0000-memory.dmp

Filesize
64KB

Download
memory/4560-160-0x00007FFC0BFB0000-0x00007FFC0BFC0000-memory.dmp

Filesize
64KB

Download
memory/4560-161-0x00007FFC0BFB0000-0x00007FFC0BFC0000-memory.dmp

Filesize
64KB

Download
memory/4792-151-0x0000000000000000-mapping.dmp

Download