64d8b1c5f101aca6c0f3e6b31e12bc2acef52ae9ab490b07ed5e228ed43aefd0

General

Target

document-630335192.xls
Size

39KB
MD5

7f32e36c3a4ab9b3c2cb70cdd7232a97
SHA1

19a8b5279606ef888421ed4482f4222a184b6313
SHA256

64d8b1c5f101aca6c0f3e6b31e12bc2acef52ae9ab490b07ed5e228ed43aefd0
SHA512

98ee0d78a0ed8ba81a5b9bce1a4745d99d9351ddc3eee6be76f5f3386cffe07bbb30a6e65a1e7cad6b5fdc47af21fd7a88fe4bbcae0e7c0667cfd3d65f63f002

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	3836	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 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

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 2 IoCs

Processes:

EXCEL.EXE

description pid process target process

PID 636 wrote to memory of 3836 636 EXCEL.EXE rundll32.exe
PID 636 wrote to memory of 3836 636 EXCEL.EXE rundll32.exe

description	pid	process	target process
PID 636 wrote to memory of 3836	636	EXCEL.EXE	rundll32.exe
PID 636 wrote to memory of 3836	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\document-630335192.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 ..\fkruf.djr,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3836

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/636-2-0x00007FF9DD1F0000-0x00007FF9DD200000-memory.dmp

Filesize
64KB

Download
memory/636-3-0x00007FF9DD1F0000-0x00007FF9DD200000-memory.dmp

Filesize
64KB

Download
memory/636-4-0x00007FF9DD1F0000-0x00007FF9DD200000-memory.dmp

Filesize
64KB

Download
memory/636-5-0x00007FF9DD1F0000-0x00007FF9DD200000-memory.dmp

Filesize
64KB

Download
memory/636-6-0x00007FFA00780000-0x00007FFA00DB7000-memory.dmp

Filesize
6.2MB

Download
memory/3836-7-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads