cf8ef27a47d0751b7d74606239868460580eb9f1b4aca176646e665cd97a2eb1

Analysis

max time kernel
165s
max time network
184s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
29-11-2022 08:44

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General

Target

cf8ef27a47d0751b7d74606239868460580eb9f1b4aca176646e665cd97a2eb1.xls
Size

162KB
MD5

2d5f2206be8584682eece9f0db900b12
SHA1

159d5962ff92a38b71a060134c59329abdd348e1
SHA256

cf8ef27a47d0751b7d74606239868460580eb9f1b4aca176646e665cd97a2eb1
SHA512

21a1f3c2bd212e11327313389918227e92b7713c15d2a371b3523fd08398a7277a1819632fbe1d45714a97163d509bc4c4c3f9db2b2fe4c4845c444a3e6a4206
SSDEEP

3072:ezq0rbx4/LiXkxGUBrpgD8IBPFm91aWVbrzb7ITk99joJtXw15k5/:EqV1ugIBe10

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	2884	4964	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4184	4964	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1324	4964	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

4964 EXCEL.EXE

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

EXCEL.EXE

pid	process
4964	EXCEL.EXE
4964	EXCEL.EXE
4964	EXCEL.EXE
4964	EXCEL.EXE
4964	EXCEL.EXE
4964	EXCEL.EXE
4964	EXCEL.EXE
4964	EXCEL.EXE
4964	EXCEL.EXE
4964	EXCEL.EXE
4964	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 4964 wrote to memory of 2884	4964	EXCEL.EXE	cmd.exe
PID 4964 wrote to memory of 2884	4964	EXCEL.EXE	cmd.exe
PID 4964 wrote to memory of 4184	4964	EXCEL.EXE	cmd.exe
PID 4964 wrote to memory of 4184	4964	EXCEL.EXE	cmd.exe
PID 4964 wrote to memory of 1324	4964	EXCEL.EXE	cmd.exe
PID 4964 wrote to memory of 1324	4964	EXCEL.EXE	cmd.exe
PID 2884 wrote to memory of 372	2884	cmd.exe	attrib.exe
PID 2884 wrote to memory of 372	2884	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

372 attrib.exe

pid	process
372	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\cf8ef27a47d0751b7d74606239868460580eb9f1b4aca176646e665cd97a2eb1.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4964

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:2884

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:372

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:4184

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:1324

C:\Windows\system32\werfault.exe
werfault.exe /h /shared Global\483ff2600a164b9eb9d3d5eb692ecff3 /t 1728 /p 4964
1⤵
PID:1712

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/372-142-0x0000000000000000-mapping.dmp

Download
memory/1324-141-0x0000000000000000-mapping.dmp

Download
memory/2884-139-0x0000000000000000-mapping.dmp

Download
memory/4184-140-0x0000000000000000-mapping.dmp

Download
memory/4964-132-0x00007FFB94410000-0x00007FFB94420000-memory.dmp

Filesize
64KB

Download
memory/4964-133-0x00007FFB94410000-0x00007FFB94420000-memory.dmp

Filesize
64KB

Download
memory/4964-134-0x00007FFB94410000-0x00007FFB94420000-memory.dmp

Filesize
64KB

Download
memory/4964-135-0x00007FFB94410000-0x00007FFB94420000-memory.dmp

Filesize
64KB

Download
memory/4964-136-0x00007FFB94410000-0x00007FFB94420000-memory.dmp

Filesize
64KB

Download
memory/4964-137-0x00007FFB923B0000-0x00007FFB923C0000-memory.dmp

Filesize
64KB

Download
memory/4964-138-0x00007FFB923B0000-0x00007FFB923C0000-memory.dmp

Filesize
64KB

Download