f121e8ed0136b54dba3c4cf2dc2a92d82c189d72ae1da1ef8de80014d9bb9676

General

Target

f121e8ed0136b54dba3c4cf2dc2a92d82c189d72ae1da1ef8de80014d9bb9676.xls
Size

1.4MB
MD5

4cdfb8886da3e667d9e0bd903ad3ebf7
SHA1

ddaa200c183abc418bfea5eecc0b20bcd7d15d56
SHA256

f121e8ed0136b54dba3c4cf2dc2a92d82c189d72ae1da1ef8de80014d9bb9676
SHA512

b3c2d3de21ea23cfd3b6a1332f23fcd77c089388e301c7d5e7b2e115bbccc45ed92589161da3ca29c419f8dc4cd3eb91e9ebbe6b86714a4e5d072f75afb8942e

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

WindowsSecurity.exe

pid process

3248 WindowsSecurity.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4204 3248 WerFault.exe WindowsSecurity.exe

pid	process
3248	WindowsSecurity.exe

pid	pid_target	process	target process
4204	3248	WerFault.exe	WindowsSecurity.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

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4428 schtasks.exe

pid	process
4428	schtasks.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

4404 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

WindowsSecurity.exe

pid process

3248 WindowsSecurity.exe
3248 WindowsSecurity.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

EXCEL.EXE

pid process

4404 EXCEL.EXE
Suspicious use of SetWindowsHookEx 10 IoCs

Processes:

EXCEL.EXE

pid process

4404 EXCEL.EXE
4404 EXCEL.EXE
4404 EXCEL.EXE
4404 EXCEL.EXE
4404 EXCEL.EXE
4404 EXCEL.EXE
4404 EXCEL.EXE
4404 EXCEL.EXE
4404 EXCEL.EXE
4404 EXCEL.EXE

pid	process
4404	EXCEL.EXE

pid	process
3248	WindowsSecurity.exe
3248	WindowsSecurity.exe

pid	process
4404	EXCEL.EXE

pid	process
4404	EXCEL.EXE
4404	EXCEL.EXE
4404	EXCEL.EXE
4404	EXCEL.EXE
4404	EXCEL.EXE
4404	EXCEL.EXE
4404	EXCEL.EXE
4404	EXCEL.EXE
4404	EXCEL.EXE
4404	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

EXCEL.EXEWindowsSecurity.execmd.exe

description	pid	process	target process
PID 4404 wrote to memory of 3248	4404	EXCEL.EXE	WindowsSecurity.exe
PID 4404 wrote to memory of 3248	4404	EXCEL.EXE	WindowsSecurity.exe
PID 4404 wrote to memory of 3248	4404	EXCEL.EXE	WindowsSecurity.exe
PID 3248 wrote to memory of 3888	3248	WindowsSecurity.exe	cmd.exe
PID 3248 wrote to memory of 3888	3248	WindowsSecurity.exe	cmd.exe
PID 3248 wrote to memory of 3888	3248	WindowsSecurity.exe	cmd.exe
PID 3888 wrote to memory of 4428	3888	cmd.exe	schtasks.exe
PID 3888 wrote to memory of 4428	3888	cmd.exe	schtasks.exe
PID 3888 wrote to memory of 4428	3888	cmd.exe	schtasks.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\f121e8ed0136b54dba3c4cf2dc2a92d82c189d72ae1da1ef8de80014d9bb9676.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4404

C:\Users\Admin\AppData\Roaming\WindowsSecurity.exe
C:\Users\Admin\AppData\Roaming\WindowsSecurity.exe
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3248

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c schtasks /create /sc daily /tn WindowsSecurityPatch /tr C:\Users\Admin\AppData\Roaming\WindowsSecurity.exe /st 11:00 /f
3⤵
- Suspicious use of WriteProcessMemory
PID:3888

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc daily /tn WindowsSecurityPatch /tr C:\Users\Admin\AppData\Roaming\WindowsSecurity.exe /st 11:00 /f
4⤵
- Creates scheduled task(s)
PID:4428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3248 -s 868
3⤵
- Program crash
PID:4204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3248 -ip 3248
1⤵
PID:1404

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

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

C:\Users\Admin\AppData\Roaming\WindowsSecurity.exe
Filesize
659KB

MD5
04f7ee1aa5e29d2f2d4ea6b539d20709

SHA1
f72d2f06ee7aeaa9180e9ba3132192332dcc1bf8

SHA256
e9d550d9a18dd0efee23eb189ba79917d39e5c33fc1dfac662248868c260f073

SHA512
d317a7a15165ebb5f04d2a77cb26359afda8a53e3a998c79fc31984581d3fde676b8c017fe80d59a1592ede7e000a48b9733c193bd0d35546ac35cb5346c81c8

Download Submit
C:\Users\Admin\AppData\Roaming\WindowsSecurity.exe
Filesize
659KB

MD5
04f7ee1aa5e29d2f2d4ea6b539d20709

SHA1
f72d2f06ee7aeaa9180e9ba3132192332dcc1bf8

SHA256
e9d550d9a18dd0efee23eb189ba79917d39e5c33fc1dfac662248868c260f073

SHA512
d317a7a15165ebb5f04d2a77cb26359afda8a53e3a998c79fc31984581d3fde676b8c017fe80d59a1592ede7e000a48b9733c193bd0d35546ac35cb5346c81c8

Download Submit
memory/3248-140-0x0000000000000000-mapping.dmp

Download
memory/3888-143-0x0000000000000000-mapping.dmp

Download
memory/4404-136-0x00007FFF5CC70000-0x00007FFF5CC80000-memory.dmp

Filesize
64KB

Download
memory/4404-137-0x00007FFF5A990000-0x00007FFF5A9A0000-memory.dmp

Filesize
64KB

Download
memory/4404-138-0x00007FFF5A990000-0x00007FFF5A9A0000-memory.dmp

Filesize
64KB

Download
memory/4404-139-0x00000218C5740000-0x00000218C5744000-memory.dmp

Filesize
16KB

Download
memory/4404-132-0x00007FFF5CC70000-0x00007FFF5CC80000-memory.dmp

Filesize
64KB

Download
memory/4404-135-0x00007FFF5CC70000-0x00007FFF5CC80000-memory.dmp

Filesize
64KB

Download
memory/4404-134-0x00007FFF5CC70000-0x00007FFF5CC80000-memory.dmp

Filesize
64KB

Download
memory/4404-133-0x00007FFF5CC70000-0x00007FFF5CC80000-memory.dmp

Filesize
64KB

Download
memory/4404-146-0x00007FFF5CC70000-0x00007FFF5CC80000-memory.dmp

Filesize
64KB

Download
memory/4404-147-0x00007FFF5CC70000-0x00007FFF5CC80000-memory.dmp

Filesize
64KB

Download
memory/4404-148-0x00007FFF5CC70000-0x00007FFF5CC80000-memory.dmp

Filesize
64KB

Download
memory/4404-149-0x00007FFF5CC70000-0x00007FFF5CC80000-memory.dmp

Filesize
64KB

Download
memory/4428-144-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads