4264f341439e6ef68445fa803daac085a4eb5d416f9f7a2e26795d1326b1d36a

Analysis

max time kernel
190s
max time network
229s
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 13:06

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General

Target

4264f341439e6ef68445fa803daac085a4eb5d416f9f7a2e26795d1326b1d36a.xls
Size

101KB
MD5

de79af87d57c3ebb841298fd07a5128b
SHA1

3fa6e7ddf74e4945d7d0def5189e23368494e398
SHA256

4264f341439e6ef68445fa803daac085a4eb5d416f9f7a2e26795d1326b1d36a
SHA512

f42a58a294eeb5492a01444f8961289f9aee933b1e0c28af162803093bd23772c0f6f379d1a019e696261dc49164457c1c8d6bff975cb9d4ad5b27bbf9fbdd2d
SSDEEP

1536:SOOO/i7vJ1NtMHaBWVbrzQ7axE6jTkR62lIM88tcJtXwR5M2M/MhFD:8BWVbrzQ7a6iTk9njmJtXwE5kvD

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	4176	2656	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2212	2656	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2104	2656	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

2656 EXCEL.EXE
Suspicious use of SetWindowsHookEx 9 IoCs

Processes:

EXCEL.EXE

pid process

2656 EXCEL.EXE
2656 EXCEL.EXE
2656 EXCEL.EXE
2656 EXCEL.EXE
2656 EXCEL.EXE
2656 EXCEL.EXE
2656 EXCEL.EXE
2656 EXCEL.EXE
2656 EXCEL.EXE

pid	process
2656	EXCEL.EXE

pid	process
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 2656 wrote to memory of 4176	2656	EXCEL.EXE	cmd.exe
PID 2656 wrote to memory of 4176	2656	EXCEL.EXE	cmd.exe
PID 2656 wrote to memory of 2212	2656	EXCEL.EXE	cmd.exe
PID 2656 wrote to memory of 2212	2656	EXCEL.EXE	cmd.exe
PID 2656 wrote to memory of 2104	2656	EXCEL.EXE	cmd.exe
PID 2656 wrote to memory of 2104	2656	EXCEL.EXE	cmd.exe
PID 4176 wrote to memory of 3932	4176	cmd.exe	attrib.exe
PID 4176 wrote to memory of 3932	4176	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

3932 attrib.exe

pid	process
3932	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\4264f341439e6ef68445fa803daac085a4eb5d416f9f7a2e26795d1326b1d36a.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2656

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:4176

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:3932

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:2212

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:2104

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\b1a9ad2e6fc446a5bef7d26881dddd73 /t 2604 /p 2656
1⤵
PID:4348

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/2104-141-0x0000000000000000-mapping.dmp

Download
memory/2212-140-0x0000000000000000-mapping.dmp

Download
memory/2656-132-0x00007FF8AD8B0000-0x00007FF8AD8C0000-memory.dmp

Filesize
64KB

Download
memory/2656-133-0x00007FF8AD8B0000-0x00007FF8AD8C0000-memory.dmp

Filesize
64KB

Download
memory/2656-134-0x00007FF8AD8B0000-0x00007FF8AD8C0000-memory.dmp

Filesize
64KB

Download
memory/2656-135-0x00007FF8AD8B0000-0x00007FF8AD8C0000-memory.dmp

Filesize
64KB

Download
memory/2656-136-0x00007FF8AD8B0000-0x00007FF8AD8C0000-memory.dmp

Filesize
64KB

Download
memory/2656-137-0x00007FF8AB690000-0x00007FF8AB6A0000-memory.dmp

Filesize
64KB

Download
memory/2656-138-0x00007FF8AB690000-0x00007FF8AB6A0000-memory.dmp

Filesize
64KB

Download
memory/3932-142-0x0000000000000000-mapping.dmp

Download
memory/4176-139-0x0000000000000000-mapping.dmp

Download