04e8dc18a0e8bf98a38384cf6d37e6e8bb9f4aabf3af0e4f3174d278fc50e537

General

Target

document-1251291620.xls
Size

90KB
MD5

66c18bb0b9dde900222b78910d60610e
SHA1

57103a5bb0ac103d3a190992c70a8d80ab69570d
SHA256

543fea0b4bac507005bcbc272fe86ae535411c709db2ce8c4b71cceb7c8ea717
SHA512

fea9b2f83e887dcdf9695ac83ca0070c8b5ee0507a1d3080007ba7b9e7ecd79d5e597547930f490c9d652ec6b567e80a9345f5cfe703706f3a6a4ef3ab1ea55a

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	2352	496	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

496 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
496	EXCEL.EXE
496	EXCEL.EXE
496	EXCEL.EXE
496	EXCEL.EXE
496	EXCEL.EXE
496	EXCEL.EXE
496	EXCEL.EXE
496	EXCEL.EXE
496	EXCEL.EXE
496	EXCEL.EXE
496	EXCEL.EXE
496	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

EXCEL.EXE

description pid process target process

PID 496 wrote to memory of 2352 496 EXCEL.EXE rundll32.exe
PID 496 wrote to memory of 2352 496 EXCEL.EXE rundll32.exe

description	pid	process	target process
PID 496 wrote to memory of 2352	496	EXCEL.EXE	rundll32.exe
PID 496 wrote to memory of 2352	496	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\document-1251291620.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:496

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\rieuro.vnt,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2352

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/496-2-0x00007FF7E5FB0000-0x00007FF7E5FC0000-memory.dmp

Filesize
64KB

Download
memory/496-3-0x00007FF7E5FB0000-0x00007FF7E5FC0000-memory.dmp

Filesize
64KB

Download
memory/496-4-0x00007FF7E5FB0000-0x00007FF7E5FC0000-memory.dmp

Filesize
64KB

Download
memory/496-5-0x00007FF7E5FB0000-0x00007FF7E5FC0000-memory.dmp

Filesize
64KB

Download
memory/496-6-0x00007FF808F50000-0x00007FF809587000-memory.dmp

Filesize
6.2MB

Download
memory/2352-7-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads