fcaf6de09617f5e5b814582b6a19e947081ada037519dd8cde42cf99c23e9ca0

Analysis

max time kernel
180s
max time network
191s
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 19:22

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General

Target

博物馆/92仿古费用表.xls
Size

88KB
MD5

a3ca7b671b6451cdcafd8f47a4e88e75
SHA1

a508ac5d96b1526c37a808f886c06dfe068fe5e9
SHA256

3b65f45b8ef1ae7e290bd79f6b4be830b8dcd3dd53ce4b2f3086c356170710a6
SHA512

85c144a33fdefe5e3b38d4a6b163a844b44605ee3ad60d664d31dcafbe622e35f55095e8b4929cce6e50ff5a7f18ff8064b1dccddd12c493cead5fa51c1f1fe9
SSDEEP

1536:i222y9MfecOg2jcc0lbxOvTgZsLcY7nJdFoOGIayWU2XKgb/:qg2jcc0lbxOr/p8baq/

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	5000	4696	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1644	4696	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	328	4696	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

4696 EXCEL.EXE
Suspicious use of SetWindowsHookEx 9 IoCs

Processes:

EXCEL.EXE

pid process

4696 EXCEL.EXE
4696 EXCEL.EXE
4696 EXCEL.EXE
4696 EXCEL.EXE
4696 EXCEL.EXE
4696 EXCEL.EXE
4696 EXCEL.EXE
4696 EXCEL.EXE
4696 EXCEL.EXE

pid	process
4696	EXCEL.EXE

pid	process
4696	EXCEL.EXE
4696	EXCEL.EXE
4696	EXCEL.EXE
4696	EXCEL.EXE
4696	EXCEL.EXE
4696	EXCEL.EXE
4696	EXCEL.EXE
4696	EXCEL.EXE
4696	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 4696 wrote to memory of 5000	4696	EXCEL.EXE	cmd.exe
PID 4696 wrote to memory of 5000	4696	EXCEL.EXE	cmd.exe
PID 4696 wrote to memory of 1644	4696	EXCEL.EXE	cmd.exe
PID 4696 wrote to memory of 1644	4696	EXCEL.EXE	cmd.exe
PID 4696 wrote to memory of 328	4696	EXCEL.EXE	cmd.exe
PID 4696 wrote to memory of 328	4696	EXCEL.EXE	cmd.exe
PID 5000 wrote to memory of 2064	5000	cmd.exe	attrib.exe
PID 5000 wrote to memory of 2064	5000	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

2064 attrib.exe

pid	process
2064	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\博物馆\92仿古费用表.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4696
- 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:5000
- - C:\Windows\system32\attrib.exe
    attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
    3⤵
    - Views/modifies file attributes
    PID:2064
- 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:1644
- 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:328

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/328-141-0x0000000000000000-mapping.dmp

Download
memory/1644-140-0x0000000000000000-mapping.dmp

Download
memory/2064-142-0x0000000000000000-mapping.dmp

Download
memory/4696-132-0x00007FF8314D0000-0x00007FF8314E0000-memory.dmp

Filesize
64KB

Download
memory/4696-133-0x00007FF8314D0000-0x00007FF8314E0000-memory.dmp

Filesize
64KB

Download
memory/4696-134-0x00007FF8314D0000-0x00007FF8314E0000-memory.dmp

Filesize
64KB

Download
memory/4696-135-0x00007FF8314D0000-0x00007FF8314E0000-memory.dmp

Filesize
64KB

Download
memory/4696-136-0x00007FF8314D0000-0x00007FF8314E0000-memory.dmp

Filesize
64KB

Download
memory/4696-137-0x00007FF82F050000-0x00007FF82F060000-memory.dmp

Filesize
64KB

Download
memory/4696-138-0x00007FF82F050000-0x00007FF82F060000-memory.dmp

Filesize
64KB

Download
memory/5000-139-0x0000000000000000-mapping.dmp

Download