b8390475faa074c46c2cb2b959e45657230a5a32a63ec6f9a9ad03db23848d90

General

Target

b8390475faa074c46c2cb2b959e45657230a5a32a63ec6f9a9ad03db23848d90.xls
Size

182KB
MD5

fa6a80af3d347156386ef2ca0b4b899f
SHA1

061b0e3bd60eee4b0f077adc7c8939b4c92161c7
SHA256

b8390475faa074c46c2cb2b959e45657230a5a32a63ec6f9a9ad03db23848d90
SHA512

66d5b55530cd4aa5a4872fc1d0febd6e8e120ff5a473af16e364e718aa106669c48b85277f03dc0d95b71e32965df70f533f8ba6dfa1ebda3cc7102b78a3b8b6
SSDEEP

3072:eYSg86/xBY+Abqp+TAmXWVbrzZF07ITk9fGo5k3eh:R86/NAbS1F

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	3984	1496	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3512	1496	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4348	1496	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\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

NTFS ADS 1 IoCs

Processes:

EXCEL.EXE

description ioc process

File created C:\Users\Admin\AppData\Local\Temp\95275E00\:Zone.Identifier:$DATA EXCEL.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1496 EXCEL.EXE

description	ioc	process
File created	C:\Users\Admin\AppData\Local\Temp\95275E00\:Zone.Identifier:$DATA	EXCEL.EXE

Suspicious use of SetWindowsHookEx 16 IoCs

Processes:

EXCEL.EXE

pid	process
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE
1496	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 1496 wrote to memory of 4116	1496	EXCEL.EXE	splwow64.exe
PID 1496 wrote to memory of 4116	1496	EXCEL.EXE	splwow64.exe
PID 1496 wrote to memory of 4348	1496	EXCEL.EXE	cmd.exe
PID 1496 wrote to memory of 4348	1496	EXCEL.EXE	cmd.exe
PID 1496 wrote to memory of 3512	1496	EXCEL.EXE	cmd.exe
PID 1496 wrote to memory of 3512	1496	EXCEL.EXE	cmd.exe
PID 1496 wrote to memory of 3984	1496	EXCEL.EXE	cmd.exe
PID 1496 wrote to memory of 3984	1496	EXCEL.EXE	cmd.exe
PID 4348 wrote to memory of 4724	4348	cmd.exe	attrib.exe
PID 4348 wrote to memory of 4724	4348	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

4724 attrib.exe

pid	process
4724	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\b8390475faa074c46c2cb2b959e45657230a5a32a63ec6f9a9ad03db23848d90.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:1496

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:4116

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:3984

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:3512

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:4348

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:4724

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
1⤵
PID:2200

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Privilege Escalation

Defense Evasion

Hidden Files and Directories

1

T1158

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1496-144-0x0000022C99FFF000-0x0000022C9A001000-memory.dmp

Filesize
8KB

Download
memory/1496-134-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1496-149-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1496-148-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1496-136-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1496-137-0x00007FFD531B0000-0x00007FFD531C0000-memory.dmp

Filesize
64KB

Download
memory/1496-138-0x00007FFD531B0000-0x00007FFD531C0000-memory.dmp

Filesize
64KB

Download
memory/1496-147-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1496-150-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1496-133-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1496-135-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/1496-145-0x0000022C99FFF000-0x0000022C9A001000-memory.dmp

Filesize
8KB

Download
memory/1496-132-0x00007FFD55B10000-0x00007FFD55B20000-memory.dmp

Filesize
64KB

Download
memory/3512-141-0x0000000000000000-mapping.dmp

Download
memory/3984-142-0x0000000000000000-mapping.dmp

Download
memory/4116-139-0x0000000000000000-mapping.dmp

Download
memory/4348-140-0x0000000000000000-mapping.dmp

Download
memory/4724-143-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads