91de33cf3d07e3b8353ff1bdf3f86ae148c4e54206efd265ed4eb50a2ba7cd41

General

Target

efe1343a32189f1b774f4c5e51f41de1.xls
Size

300KB
MD5

efe1343a32189f1b774f4c5e51f41de1
SHA1

a9a9f1bdf0ac76147f217a6cea31490d4ec8d72a
SHA256

91de33cf3d07e3b8353ff1bdf3f86ae148c4e54206efd265ed4eb50a2ba7cd41
SHA512

f68de19a8fc5db34f0aa6b21a53823a131d3aeb38d484a6ff7013ce544360a2f51fb2975d128cc4050cecc3e97f205dd4a1114f93b2ecffc4fadb329ee62ac61
SSDEEP

3072:YLm7v9y02M3/yPffiSRRRDLuTxXnPjAYHOEHEGjq4yWgWDecBGPfeZj1HHebx8k0:5vY02M3/rpuEweMY48F8CO+T

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 3 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

cmd.execmd.execmd.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	3772	3612	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	408	3612	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3640	3612	cmd.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

NTFS ADS 1 IoCs

Processes:

EXCEL.EXE

description ioc process

File created C:\Users\Admin\AppData\Local\Temp\14865E00\:Zone.Identifier:$DATA EXCEL.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

3612 EXCEL.EXE

description	ioc	process
File created	C:\Users\Admin\AppData\Local\Temp\14865E00\:Zone.Identifier:$DATA	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3612	EXCEL.EXE
3612	EXCEL.EXE
3612	EXCEL.EXE
3612	EXCEL.EXE
3612	EXCEL.EXE
3612	EXCEL.EXE
3612	EXCEL.EXE
3612	EXCEL.EXE
3612	EXCEL.EXE
3612	EXCEL.EXE
3612	EXCEL.EXE
3612	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 3612 wrote to memory of 3772	3612	EXCEL.EXE	cmd.exe
PID 3612 wrote to memory of 3772	3612	EXCEL.EXE	cmd.exe
PID 3612 wrote to memory of 408	3612	EXCEL.EXE	cmd.exe
PID 3612 wrote to memory of 408	3612	EXCEL.EXE	cmd.exe
PID 3612 wrote to memory of 3640	3612	EXCEL.EXE	cmd.exe
PID 3612 wrote to memory of 3640	3612	EXCEL.EXE	cmd.exe
PID 3772 wrote to memory of 1736	3772	cmd.exe	attrib.exe
PID 3772 wrote to memory of 1736	3772	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

1736 attrib.exe

pid	process
1736	attrib.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\efe1343a32189f1b774f4c5e51f41de1.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- NTFS ADS
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3612

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:3772

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:1736

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c Del /F /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
2⤵
- Process spawned unexpected child process
PID:408

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c RD /S /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
2⤵
- Process spawned unexpected child process
PID:3640

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Privilege Escalation

Defense Evasion

Hidden Files and Directories

1

T1158

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/408-140-0x0000000000000000-mapping.dmp

Download
memory/1736-143-0x0000000000000000-mapping.dmp

Download
memory/3612-144-0x00000280C189E000-0x00000280C18A0000-memory.dmp

Filesize
8KB

Download
memory/3612-133-0x00007FFD831B0000-0x00007FFD831C0000-memory.dmp

Filesize
64KB

Download
memory/3612-136-0x00007FFD831B0000-0x00007FFD831C0000-memory.dmp

Filesize
64KB

Download
memory/3612-137-0x00007FFD80E70000-0x00007FFD80E80000-memory.dmp

Filesize
64KB

Download
memory/3612-138-0x00007FFD80E70000-0x00007FFD80E80000-memory.dmp

Filesize
64KB

Download
memory/3612-150-0x00007FFD831B0000-0x00007FFD831C0000-memory.dmp

Filesize
64KB

Download
memory/3612-149-0x00007FFD831B0000-0x00007FFD831C0000-memory.dmp

Filesize
64KB

Download
memory/3612-135-0x00007FFD831B0000-0x00007FFD831C0000-memory.dmp

Filesize
64KB

Download
memory/3612-142-0x00000280C1A46000-0x00000280C1A48000-memory.dmp

Filesize
8KB

Download
memory/3612-134-0x00007FFD831B0000-0x00007FFD831C0000-memory.dmp

Filesize
64KB

Download
memory/3612-132-0x00007FFD831B0000-0x00007FFD831C0000-memory.dmp

Filesize
64KB

Download
memory/3612-145-0x00000280C1A46000-0x00000280C1A48000-memory.dmp

Filesize
8KB

Download
memory/3612-147-0x00007FFD831B0000-0x00007FFD831C0000-memory.dmp

Filesize
64KB

Download
memory/3612-148-0x00007FFD831B0000-0x00007FFD831C0000-memory.dmp

Filesize
64KB

Download
memory/3640-141-0x0000000000000000-mapping.dmp

Download
memory/3772-139-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads