b6a2a4a911c808f75204b6fbf55a0fc4c6408b0240d3f59e8e5933b186a1d68f

Analysis

max time kernel
101s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
31/01/2023, 17:28

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General

Target
ca9141d70ac492e6adb61f3c7e14ed59.xls
Size 289KB
Sample230131-v12gnsbb51
SHA256 b6a2a4a911c808f75204b6fbf55a0fc4c6408b0240d3f59e8e5933b186a1d68f
MD5 ca9141d70ac492e6adb61f3c7e14ed59
SHA1 56ebf9533953af1c34f3bc89b527c78fecb1cbce
SHA512 73ad90fc3017ff4424e8b805655ba31976e174dd815786ccc5230d359b5c33af0c025692a285f5150031a0d8d04df143e61a1f3783369738f82643784be43834
SSDEEP 3072:LP99KZ26S+xPffpSRRRDLuTUXnPjAYmOEHEGjq4yW9WDecBGPfeZh1HHebx8kAP7:D9YZ26S+PW5EwNMY68h8CO3
MD5 SHA1 SHA512 SSDEEP

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.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1540	4056	cmd.exe	79
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4332	4056	cmd.exe	79
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4232	4056	cmd.exe	79

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

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

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

NTFS ADS 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\23965E00\:Zone.Identifier:$DATA	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4056	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE
4056	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4056 wrote to memory of 1540	4056	EXCEL.EXE	82
PID 4056 wrote to memory of 1540	4056	EXCEL.EXE	82
PID 4056 wrote to memory of 4232	4056	EXCEL.EXE	87
PID 4056 wrote to memory of 4232	4056	EXCEL.EXE	87
PID 4056 wrote to memory of 4332	4056	EXCEL.EXE	85
PID 4056 wrote to memory of 4332	4056	EXCEL.EXE	85
PID 1540 wrote to memory of 2336	1540	cmd.exe	88
PID 1540 wrote to memory of 2336	1540	cmd.exe	88

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
2336	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\ca9141d70ac492e6adb61f3c7e14ed59.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:4056
- 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:1540
- - C:\Windows\system32\attrib.exe
    attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
    3⤵
    - Views/modifies file attributes
    PID:2336
- 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:4332
- 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:4232

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

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Downloads

memory/4056-138-0x00007FF8E1100000-0x00007FF8E1110000-memory.dmp

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memory/4056-135-0x00007FF8E3A30000-0x00007FF8E3A40000-memory.dmp

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memory/4056-136-0x00007FF8E3A30000-0x00007FF8E3A40000-memory.dmp

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memory/4056-137-0x00007FF8E1100000-0x00007FF8E1110000-memory.dmp

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memory/4056-132-0x00007FF8E3A30000-0x00007FF8E3A40000-memory.dmp

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memory/4056-134-0x00007FF8E3A30000-0x00007FF8E3A40000-memory.dmp

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memory/4056-133-0x00007FF8E3A30000-0x00007FF8E3A40000-memory.dmp

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memory/4056-144-0x00007FF8E3A30000-0x00007FF8E3A40000-memory.dmp

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memory/4056-145-0x00007FF8E3A30000-0x00007FF8E3A40000-memory.dmp

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memory/4056-147-0x00007FF8E3A30000-0x00007FF8E3A40000-memory.dmp

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memory/4056-146-0x00007FF8E3A30000-0x00007FF8E3A40000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads