c5ca585d11cbe3105aaf9187f308a29da6ad83c30625726b4f4c176eab60baeb

General

Target

catalog-250355479.xls
Size

367KB
MD5

3383ba2bb29cb5ccb5d2d062d0c81c91
SHA1

9fcadeb88dab3f3eb873d6e1c127d341b151afea
SHA256

ce1817251620fb293c886edcf300ce04de866b82d56493ddd24a130a26ca3c73
SHA512

d5dcad1f22e297ef3e9963b02e3b435a6d1e55f5910a15693cb7f13ede88528be5f8b951c1efa8c45a02d5845ea23ca94a4b22ed6c2d068a41a9412bc56634db

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	3776	4020	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4036	4020	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

4020 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE
4020	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4020 wrote to memory of 3776	4020	EXCEL.EXE	rundll32.exe
PID 4020 wrote to memory of 3776	4020	EXCEL.EXE	rundll32.exe
PID 4020 wrote to memory of 4036	4020	EXCEL.EXE	rundll32.exe
PID 4020 wrote to memory of 4036	4020	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-250355479.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4020

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\tuti.rut,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3776

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\tuti.rut1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:4036

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

Replay Monitor

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Downloads

memory/3776-179-0x0000000000000000-mapping.dmp

Download
memory/4020-114-0x00007FF7B9320000-0x00007FF7BC8D6000-memory.dmp

Filesize
53.7MB

Download
memory/4020-115-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp

Filesize
64KB

Download
memory/4020-116-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp

Filesize
64KB

Download
memory/4020-117-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp

Filesize
64KB

Download
memory/4020-118-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp

Filesize
64KB

Download
memory/4020-121-0x00007FFF9B3D0000-0x00007FFF9B3E0000-memory.dmp

Filesize
64KB

Download
memory/4020-122-0x00007FFFBBDA0000-0x00007FFFBCE8E000-memory.dmp

Filesize
16.9MB

Download
memory/4020-123-0x000001C0D32E0000-0x000001C0D51D5000-memory.dmp

Filesize
31.0MB

Download
memory/4036-180-0x0000000000000000-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