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General

Target

catalog-203745182.xls
Size

367KB
MD5

c1c547ac52184fb6c1e601065c7eaf1c
SHA1

e76ca501ef368a71ffb7ab89c6100a2c071fbac9
SHA256

e084781ccd76988b8b6d15381545731686b58036a20df462657dd4ab361a95c4
SHA512

efbd27076fb369d866750a0174b6a86abad36211eadfb8046a48e98ac251b3d09094fee047770e34324c26d77ec4dac4afccd4769b5ebc9f9d1263ba0962c05e

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	3348	636	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1248	636	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

636 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE
636	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 636 wrote to memory of 3348	636	EXCEL.EXE	rundll32.exe
PID 636 wrote to memory of 3348	636	EXCEL.EXE	rundll32.exe
PID 636 wrote to memory of 1248	636	EXCEL.EXE	rundll32.exe
PID 636 wrote to memory of 1248	636	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-203745182.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:636

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\tuti.rut,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3348

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\tuti.rut1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1248

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/636-114-0x00007FF627310000-0x00007FF62A8C6000-memory.dmp

Filesize
53.7MB

Download
memory/636-115-0x00007FFF50D30000-0x00007FFF50D40000-memory.dmp

Filesize
64KB

Download
memory/636-116-0x00007FFF50D30000-0x00007FFF50D40000-memory.dmp

Filesize
64KB

Download
memory/636-117-0x00007FFF50D30000-0x00007FFF50D40000-memory.dmp

Filesize
64KB

Download
memory/636-118-0x00007FFF50D30000-0x00007FFF50D40000-memory.dmp

Filesize
64KB

Download
memory/636-122-0x00007FFF50D30000-0x00007FFF50D40000-memory.dmp

Filesize
64KB

Download
memory/636-121-0x00007FFF714A0000-0x00007FFF7258E000-memory.dmp

Filesize
16.9MB

Download
memory/636-123-0x00007FFF6F5A0000-0x00007FFF71495000-memory.dmp

Filesize
31.0MB

Download
memory/1248-180-0x0000000000000000-mapping.dmp

Download
memory/3348-179-0x0000000000000000-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