a9dbf7b6e18c909880ffb9776eee944cd35745933c22267580e779cae371ead5

General

Target

catalog-249397.xls
Size

367KB
MD5

b3905a4e83c1bead87d497b30c37617c
SHA1

ac63f819f6dfee2b1d5c9e6c83f4068f3467e380
SHA256

612372ef00effc54e2b9a975704ae923ba9161fef0fcc94f4b4018275b9f434d
SHA512

b9f9b6e36c3f6559e1884097764db5110bf0b35abdbee1bf49075b7a92d81a5e0bd517b0398f1d051073b74f48c63f9a8c7e5400715144d8f97f2bc4832dfaa0

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 2 IoCs

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

Processes:

rundll32.exerundll32.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	1432	3872	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1816	3872	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 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

3872 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE
3872	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 3872 wrote to memory of 1432	3872	EXCEL.EXE	rundll32.exe
PID 3872 wrote to memory of 1432	3872	EXCEL.EXE	rundll32.exe
PID 3872 wrote to memory of 1816	3872	EXCEL.EXE	rundll32.exe
PID 3872 wrote to memory of 1816	3872	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\catalog-249397.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3872

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\tuti.rut,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1432

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\tuti.rut1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1816

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1432-179-0x0000000000000000-mapping.dmp

Download
memory/1816-180-0x0000000000000000-mapping.dmp

Download
memory/3872-114-0x00007FF71D9E0000-0x00007FF720F96000-memory.dmp

Filesize
53.7MB

Download
memory/3872-116-0x00007FFDDC160000-0x00007FFDDC170000-memory.dmp

Filesize
64KB

Download
memory/3872-115-0x00007FFDDC160000-0x00007FFDDC170000-memory.dmp

Filesize
64KB

Download
memory/3872-117-0x00007FFDDC160000-0x00007FFDDC170000-memory.dmp

Filesize
64KB

Download
memory/3872-118-0x00007FFDDC160000-0x00007FFDDC170000-memory.dmp

Filesize
64KB

Download
memory/3872-121-0x00007FFDFC700000-0x00007FFDFD7EE000-memory.dmp

Filesize
16.9MB

Download
memory/3872-123-0x00007FFDDC160000-0x00007FFDDC170000-memory.dmp

Filesize
64KB

Download
memory/3872-122-0x00007FFDFA800000-0x00007FFDFC6F5000-memory.dmp

Filesize
31.0MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads