3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42

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31-03-2023 20:37

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31-03-2023 20:34

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31-03-2023 20:32

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Analysis

max time kernel
3s
max time network
7s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
31-03-2023 20:34

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Report Analysis Logs

General

Target

MEMZ.exe
Size

12KB
MD5

a7bcf7ea8e9f3f36ebfb85b823e39d91
SHA1

761168201520c199dba68add3a607922d8d4a86e
SHA256

3ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42
SHA512

89923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523
SSDEEP

192:HMDLTxWDf/pl3cIEiwqZKBktLe3P+qf2jhP6B5b2yL3:H4IDH3cIqqvUWq+jhyT2yL

Score

7^/10

bootkit persistence

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

MEMZ.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation MEMZ.exe
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
bootkit persistence

Bootkit
T1067

Processes:

MEMZ.exe

description ioc process

File opened for modification \??\PhysicalDrive0 MEMZ.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

MEMZ.exe

pid process

1604 MEMZ.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	MEMZ.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	MEMZ.exe

pid	process
1604	MEMZ.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

MEMZ.exe

description	pid	process	target process
PID 2544 wrote to memory of 2608	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 2608	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 2608	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 4544	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 4544	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 4544	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 2164	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 2164	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 2164	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 4660	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 4660	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 4660	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 4656	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 4656	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 4656	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 1604	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 1604	2544	MEMZ.exe	MEMZ.exe
PID 2544 wrote to memory of 1604	2544	MEMZ.exe	MEMZ.exe

C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
"C:\Users\Admin\AppData\Local\Temp\MEMZ.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2544

C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
"C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
2⤵
PID:2608

C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
"C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
2⤵
PID:4544

C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
"C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
2⤵
PID:2164

C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
"C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
2⤵
PID:4660

C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
"C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /watchdog
2⤵
PID:4656

C:\Users\Admin\AppData\Local\Temp\MEMZ.exe
"C:\Users\Admin\AppData\Local\Temp\MEMZ.exe" /main
2⤵
- Writes to the Master Boot Record (MBR)
- Suspicious use of SetWindowsHookEx
PID:1604

C:\Windows\SysWOW64\notepad.exe
"C:\Windows\System32\notepad.exe" \note.txt
3⤵
PID:4592

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

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

C:\note.txt
Filesize
218B

MD5
afa6955439b8d516721231029fb9ca1b

SHA1
087a043cc123c0c0df2ffadcf8e71e3ac86bbae9

SHA256
8e9f20f6864c66576536c0b866c6ffdcf11397db67fe120e972e244c3c022270

SHA512
5da21a31fbc4e8250dffed30f66b896bdf007ac91948140334fe36a3f010e1bac3e70a07e9f3eb9da8633189091fd5cadcabbaacd3e01da0fe7ae28a11b3dddf

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