f73fccc50cda7bc1f80239ec7c5bfaffdca7b62db4623c65944db32c938eefa9

Analysis

max time kernel
190s
max time network
188s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
27-11-2022 02:55

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General

Target

ͬļ--豸/1.¼1 ŵ1_ͬ¼.xls
Size

85KB
MD5

1b312b1526b03f5e4a56672f4978fcfd
SHA1

37f82d04b2d0c432c95bd765d0b9ef5380afc7e4
SHA256

930233d6a045cd9d4b8a2971d1a176aedfb58a25f04fc20ca3b0ebe629471973
SHA512

64677cfaee666d80c4937b553a44034b84505caa14da4f03d22e3491b8447a18f97cb696590ff03e90d3a0b1619bb592ea44f5932c1e97ecc7b4238d3153b957
SSDEEP

1536:HOOOO67DSy1NO2lXbjSytC2BhYS6Drm1gxv7yZmspH7+cclKiEZClsPI4ukoRWGx:Rm1gxv7yZmspH7+cclKisPI4ukoRWGNf

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	2512	2548	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1680	2548	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3112	2548	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

2548 EXCEL.EXE
Suspicious use of SetWindowsHookEx 9 IoCs

Processes:

EXCEL.EXE

pid process

2548 EXCEL.EXE
2548 EXCEL.EXE
2548 EXCEL.EXE
2548 EXCEL.EXE
2548 EXCEL.EXE
2548 EXCEL.EXE
2548 EXCEL.EXE
2548 EXCEL.EXE
2548 EXCEL.EXE

pid	process
2548	EXCEL.EXE

pid	process
2548	EXCEL.EXE
2548	EXCEL.EXE
2548	EXCEL.EXE
2548	EXCEL.EXE
2548	EXCEL.EXE
2548	EXCEL.EXE
2548	EXCEL.EXE
2548	EXCEL.EXE
2548	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 2548 wrote to memory of 4760	2548	EXCEL.EXE	splwow64.exe
PID 2548 wrote to memory of 4760	2548	EXCEL.EXE	splwow64.exe
PID 2548 wrote to memory of 2512	2548	EXCEL.EXE	cmd.exe
PID 2548 wrote to memory of 2512	2548	EXCEL.EXE	cmd.exe
PID 2548 wrote to memory of 1680	2548	EXCEL.EXE	cmd.exe
PID 2548 wrote to memory of 1680	2548	EXCEL.EXE	cmd.exe
PID 2548 wrote to memory of 3112	2548	EXCEL.EXE	cmd.exe
PID 2548 wrote to memory of 3112	2548	EXCEL.EXE	cmd.exe
PID 2512 wrote to memory of 4712	2512	cmd.exe	attrib.exe
PID 2512 wrote to memory of 4712	2512	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

4712 attrib.exe

pid	process
4712	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\ͬļ--豸\1.¼1 ŵ1_ͬ¼.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2548

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:4760

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:2512

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:4712

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:1680

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:3112

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
1⤵
PID:4700

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\b9f9ad59785246c7a33922c1c2703a2d /t 748 /p 2548
1⤵
PID:2252

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/1680-143-0x0000000000000000-mapping.dmp

Download
memory/2512-142-0x0000000000000000-mapping.dmp

Download
memory/2548-132-0x00007FF9D4C70000-0x00007FF9D4C80000-memory.dmp

Filesize
64KB

Download
memory/2548-133-0x00007FF9D4C70000-0x00007FF9D4C80000-memory.dmp

Filesize
64KB

Download
memory/2548-134-0x00007FF9D4C70000-0x00007FF9D4C80000-memory.dmp

Filesize
64KB

Download
memory/2548-135-0x00007FF9D4C70000-0x00007FF9D4C80000-memory.dmp

Filesize
64KB

Download
memory/2548-136-0x00007FF9D4C70000-0x00007FF9D4C80000-memory.dmp

Filesize
64KB

Download
memory/2548-137-0x00007FF9D24F0000-0x00007FF9D2500000-memory.dmp

Filesize
64KB

Download
memory/2548-138-0x00007FF9D24F0000-0x00007FF9D2500000-memory.dmp

Filesize
64KB

Download
memory/3112-144-0x0000000000000000-mapping.dmp

Download
memory/4712-145-0x0000000000000000-mapping.dmp

Download
memory/4760-139-0x0000000000000000-mapping.dmp

Download