0a77c980c1b6ad85ffb3f1e8e814f96e09d5033d82dce7ca2062b992372c85e6

Analysis

max time kernel
181s
max time network
198s
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9组.xls
Size

102KB
MD5

2269705b0b0087eeeaa0e898ca3d6a58
SHA1

e78bab8a55d6e9859455572f55061729f25ff9f1
SHA256

418cbd99460c6c24ddd1aa7072e2a2a1d3c4a5546aa75d0e11b034015488b041
SHA512

9ebd0a1820f06d5bccd3088a451c42f30d0edf17246ff3c7deb8d42c047e972d528310a8755fb965546700995f40754ef82c034f9d23370722250de0a35354ac
SSDEEP

1536:LQQQca5QyDHBWVbrzlp7ITkR62lGM88wcJtXwRlM2M/M/EbdF:+WVbrz/7ITk9tjDJtXw45kYdF

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	4904	1880	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3192	1880	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3928	1880	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\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

1880 EXCEL.EXE
Suspicious use of SetWindowsHookEx 10 IoCs

Processes:

EXCEL.EXE

pid process

1880 EXCEL.EXE
1880 EXCEL.EXE
1880 EXCEL.EXE
1880 EXCEL.EXE
1880 EXCEL.EXE
1880 EXCEL.EXE
1880 EXCEL.EXE
1880 EXCEL.EXE
1880 EXCEL.EXE
1880 EXCEL.EXE

pid	process
1880	EXCEL.EXE

pid	process
1880	EXCEL.EXE
1880	EXCEL.EXE
1880	EXCEL.EXE
1880	EXCEL.EXE
1880	EXCEL.EXE
1880	EXCEL.EXE
1880	EXCEL.EXE
1880	EXCEL.EXE
1880	EXCEL.EXE
1880	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1880 wrote to memory of 4904	1880	EXCEL.EXE	cmd.exe
PID 1880 wrote to memory of 4904	1880	EXCEL.EXE	cmd.exe
PID 1880 wrote to memory of 3192	1880	EXCEL.EXE	cmd.exe
PID 1880 wrote to memory of 3192	1880	EXCEL.EXE	cmd.exe
PID 1880 wrote to memory of 3928	1880	EXCEL.EXE	cmd.exe
PID 1880 wrote to memory of 3928	1880	EXCEL.EXE	cmd.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

4844 attrib.exe

pid	process
4844	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9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:1880

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
PID:4904

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:4844

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:3192

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:3928

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/1880-132-0x00007FFE8F650000-0x00007FFE8F660000-memory.dmp

Filesize
64KB

Download
memory/1880-133-0x00007FFE8F650000-0x00007FFE8F660000-memory.dmp

Filesize
64KB

Download
memory/1880-134-0x00007FFE8F650000-0x00007FFE8F660000-memory.dmp

Filesize
64KB

Download
memory/1880-135-0x00007FFE8F650000-0x00007FFE8F660000-memory.dmp

Filesize
64KB

Download
memory/1880-136-0x00007FFE8F650000-0x00007FFE8F660000-memory.dmp

Filesize
64KB

Download
memory/1880-137-0x00007FFE8CDA0000-0x00007FFE8CDB0000-memory.dmp

Filesize
64KB

Download
memory/1880-138-0x00007FFE8CDA0000-0x00007FFE8CDB0000-memory.dmp

Filesize
64KB

Download
memory/1880-142-0x000001B97C34C000-0x000001B97C34E000-memory.dmp

Filesize
8KB

Download
memory/3192-140-0x0000000000000000-mapping.dmp

Download
memory/3928-141-0x0000000000000000-mapping.dmp

Download
memory/4904-139-0x0000000000000000-mapping.dmp

Download