bcaa5fe5865a1a230a51fe5b0214499dafb1b937378268c9bbfd5fd5e84fdb15

General

Target

Attachment_97504.xlsb
Size

197KB
MD5

5c5ef91f7bdb367537ceadab633f0723
SHA1

ca774e6f3cfb98d736ce1c385d1f73b0a293b2a0
SHA256

bcaa5fe5865a1a230a51fe5b0214499dafb1b937378268c9bbfd5fd5e84fdb15
SHA512

bc7d55eb89b7da06beb53c148337e10cbea9d4d67474d79b355be5cf80d3183558e21a6a7fb2e50c9a6c0d2348114e886cb1f095c6f64262ca857f362b344b8b

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:

rundll32.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	2184	4764	rundll32.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

4764 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

4764 EXCEL.EXE
4764 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4764	EXCEL.EXE
4764	EXCEL.EXE
4764	EXCEL.EXE
4764	EXCEL.EXE
4764	EXCEL.EXE
4764	EXCEL.EXE
4764	EXCEL.EXE
4764	EXCEL.EXE
4764	EXCEL.EXE
4764	EXCEL.EXE
4764	EXCEL.EXE
4764	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4764 wrote to memory of 2184	4764	EXCEL.EXE	rundll32.exe
PID 4764 wrote to memory of 2184	4764	EXCEL.EXE	rundll32.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\Attachment_97504.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4764

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\ProgramData\uoxv\50.dll,DllRegisterServer1
2⤵
- Process spawned unexpected child process
PID:2184

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\uoxv\50.dll
MD5
3daa3637a98ab3323039a0e245e4ca7b

SHA1
b6a910d8d848c3191bc310e10430dc7a40876c28

SHA256
dd81802516d08d9a6f8697420b08168265dbf86ba3b74cae00f53b5546f44918

SHA512
6730350e1416afeb3fb218f1226bef40180e1e8147c3d88081c184e52c3b30ef09cf66d598da5f4ce733cbbe373434387e0232e2d73ed4abaa2e0d9ebeb383cf

Download Submit
memory/2184-7-0x0000000000000000-mapping.dmp

Download
memory/4764-2-0x00007FF91BD80000-0x00007FF91BD90000-memory.dmp

Filesize
64KB

Download
memory/4764-3-0x00007FF91BD80000-0x00007FF91BD90000-memory.dmp

Filesize
64KB

Download
memory/4764-4-0x00007FF91BD80000-0x00007FF91BD90000-memory.dmp

Filesize
64KB

Download
memory/4764-5-0x00007FF93F800000-0x00007FF93FE37000-memory.dmp

Filesize
6.2MB

Download
memory/4764-6-0x00007FF91BD80000-0x00007FF91BD90000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads