3fcb61eb0a502ebda86dc313e7ce31a0ea2098b3172404afaa620f4c75b84d67

General

Target

document-1761664386.xls
Size

138KB
MD5

1fc8e84958d40886d6c701514c655cbe
SHA1

55ba8bc1bcb801883ddd7bb1fd8ffa41672baf2d
SHA256

3fcb61eb0a502ebda86dc313e7ce31a0ea2098b3172404afaa620f4c75b84d67
SHA512

3a0cb6a74a5e14d104c8d09badd6e59d86d1fcd662d2810fc4ec70f3de1d60645b877a1deaadcb2511df311ec7e1282c592ce15900e0d4f635e31efa15bac319

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	3892	580	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\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

580 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
580	EXCEL.EXE
580	EXCEL.EXE
580	EXCEL.EXE
580	EXCEL.EXE
580	EXCEL.EXE
580	EXCEL.EXE
580	EXCEL.EXE
580	EXCEL.EXE
580	EXCEL.EXE
580	EXCEL.EXE
580	EXCEL.EXE
580	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

EXCEL.EXE

description pid process target process

PID 580 wrote to memory of 3892 580 EXCEL.EXE rundll32.exe
PID 580 wrote to memory of 3892 580 EXCEL.EXE rundll32.exe

description	pid	process	target process
PID 580 wrote to memory of 3892	580	EXCEL.EXE	rundll32.exe
PID 580 wrote to memory of 3892	580	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-1761664386.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:580

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\zfbfg.ere,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3892

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

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Downloads

memory/580-2-0x00007FFE76A80000-0x00007FFE76A90000-memory.dmp

Filesize
64KB

Download
memory/580-3-0x00007FFE76A80000-0x00007FFE76A90000-memory.dmp

Filesize
64KB

Download
memory/580-4-0x00007FFE76A80000-0x00007FFE76A90000-memory.dmp

Filesize
64KB

Download
memory/580-5-0x00007FFE99BC0000-0x00007FFE9A1F7000-memory.dmp

Filesize
6.2MB

Download
memory/580-6-0x00007FFE76A80000-0x00007FFE76A90000-memory.dmp

Filesize
64KB

Download
memory/3892-7-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads