31f727b537369242551b7238d9509fca9701b36c423c2d452f241e5caf581f3f

General

Target

31f727b537369242551b7238d9509fca9701b36c423c2d452f241e5caf581f3f.xls
Size

99KB
MD5

e997a0cd4dd33f34e44d2b3be1cff1f1
SHA1

58a410ee53b87cff7b602d406baa6f8055bbedd5
SHA256

31f727b537369242551b7238d9509fca9701b36c423c2d452f241e5caf581f3f
SHA512

33eead59eed7043bc338a758fcb0b890f560c90d729bf9fab8b2096de79b91e7729b04b4f1e640aafc26e4398aa03f6ddb722fe497b1406096fe880be1d57584
SSDEEP

3072:pvaqeAazRcWVbrzQ7IscDukZ7jn0fX4gD:pvaqefwc4

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.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4308	4328	cmd.exe	80
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2160	4328	cmd.exe	80
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4392	4328	cmd.exe	80

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

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

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

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\CBD75E00\:Zone.Identifier:$DATA	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4328	EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

pid	Process
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE
4328	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4328 wrote to memory of 4308	4328	EXCEL.EXE	84
PID 4328 wrote to memory of 4308	4328	EXCEL.EXE	84
PID 4328 wrote to memory of 4392	4328	EXCEL.EXE	89
PID 4328 wrote to memory of 4392	4328	EXCEL.EXE	89
PID 4328 wrote to memory of 2160	4328	EXCEL.EXE	88
PID 4328 wrote to memory of 2160	4328	EXCEL.EXE	88
PID 4308 wrote to memory of 4240	4308	cmd.exe	90
PID 4308 wrote to memory of 4240	4308	cmd.exe	90

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
4240	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\31f727b537369242551b7238d9509fca9701b36c423c2d452f241e5caf581f3f.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:4328
- 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:4308
- - C:\Windows\system32\attrib.exe
    attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
    3⤵
    - Views/modifies file attributes
    PID:4240
- 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:2160
- 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:4392

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

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Downloads

memory/4328-136-0x00007FFDFA5B0000-0x00007FFDFA5C0000-memory.dmp

Filesize
64KB

Download
memory/4328-134-0x00007FFDFA5B0000-0x00007FFDFA5C0000-memory.dmp

Filesize
64KB

Download
memory/4328-137-0x00007FFDF8030000-0x00007FFDF8040000-memory.dmp

Filesize
64KB

Download
memory/4328-138-0x00007FFDF8030000-0x00007FFDF8040000-memory.dmp

Filesize
64KB

Download
memory/4328-139-0x000001C76DA43000-0x000001C76DA45000-memory.dmp

Filesize
8KB

Download
memory/4328-135-0x00007FFDFA5B0000-0x00007FFDFA5C0000-memory.dmp

Filesize
64KB

Download
memory/4328-149-0x00007FFDFA5B0000-0x00007FFDFA5C0000-memory.dmp

Filesize
64KB

Download
memory/4328-132-0x00007FFDFA5B0000-0x00007FFDFA5C0000-memory.dmp

Filesize
64KB

Download
memory/4328-133-0x00007FFDFA5B0000-0x00007FFDFA5C0000-memory.dmp

Filesize
64KB

Download
memory/4328-144-0x000001C76DA43000-0x000001C76DA45000-memory.dmp

Filesize
8KB

Download
memory/4328-146-0x00007FFDFA5B0000-0x00007FFDFA5C0000-memory.dmp

Filesize
64KB

Download
memory/4328-147-0x00007FFDFA5B0000-0x00007FFDFA5C0000-memory.dmp

Filesize
64KB

Download
memory/4328-148-0x00007FFDFA5B0000-0x00007FFDFA5C0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads