c5b0df46075cba61ef85639d38770db86e2d9fb36281f488df45ce1816555109

General

Target

catalog-228950226.xls
Size

367KB
MD5

627b3d036aca4594e79d87c368592319
SHA1

998597b00a33173b4b36ccf3aee397b84577c671
SHA256

41ba4b5f9b71c4f3562a7d16bb9681f9714203c3c627d9e59e647b923a66d13e
SHA512

845a916a8aa9d00e3dad5f336dd9a6def3e00d968f7a3502d9edaccc2d4cc9fdf09b7621f0006c1d1dac7b1b02fda2b65b92e3717dc2832372dbe517e928585b

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	3904	900	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3584	900	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

900 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE
900	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 900 wrote to memory of 3904	900	EXCEL.EXE	rundll32.exe
PID 900 wrote to memory of 3904	900	EXCEL.EXE	rundll32.exe
PID 900 wrote to memory of 3584	900	EXCEL.EXE	rundll32.exe
PID 900 wrote to memory of 3584	900	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-228950226.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:900

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\tuti.rut,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3904

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\tuti.rut1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3584

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/900-114-0x00007FF786560000-0x00007FF789B16000-memory.dmp

Filesize
53.7MB

Download
memory/900-115-0x00007FFB7C310000-0x00007FFB7C320000-memory.dmp

Filesize
64KB

Download
memory/900-116-0x00007FFB7C310000-0x00007FFB7C320000-memory.dmp

Filesize
64KB

Download
memory/900-118-0x00007FFB7C310000-0x00007FFB7C320000-memory.dmp

Filesize
64KB

Download
memory/900-117-0x00007FFB7C310000-0x00007FFB7C320000-memory.dmp

Filesize
64KB

Download
memory/900-119-0x00007FFB7C310000-0x00007FFB7C320000-memory.dmp

Filesize
64KB

Download
memory/900-122-0x00007FFB9C9A0000-0x00007FFB9DA8E000-memory.dmp

Filesize
16.9MB

Download
memory/900-123-0x00007FFB9AAA0000-0x00007FFB9C995000-memory.dmp

Filesize
31.0MB

Download
memory/3584-180-0x0000000000000000-mapping.dmp

Download
memory/3904-179-0x0000000000000000-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