a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
11-05-2024 01:18

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General

Target

a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe
Size

3.8MB
MD5

32a65707a2aca0e50ca3669bf3e839be
SHA1

9205b864cd3f7a2afc1b679f08ac4aac7aa11a09
SHA256

a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041
SHA512

a41db4d042ad1f9c24047649fa28bb844721d460e6092da9ccc8e65a63d7a539917508a659362a393cb17713b5b626ea28805f63c796c2a48ffe2e2159b9aad4
SSDEEP

98304:WEjlmQbfgSgwvSnN4iVJui0xdRoM5XBHsdqy:WEjgQPXqOvWdqy

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

Processes:

a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe

pid process

1544 a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe
Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.

Query Registry
T1012

Peripheral Device Discovery
T1120

System Information Discovery
T1082

Processes:

a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe

description ioc process

File opened (read-only) \??\F: a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.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
T1542.003

Processes:

a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe

description ioc process

File opened for modification \??\PhysicalDrive0 a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe

description	ioc	process
File opened (read-only)	\??\F:	a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe

pid	process
1544	a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe
1544	a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe

C:\Users\Admin\AppData\Local\Temp\a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe
"C:\Users\Admin\AppData\Local\Temp\a4fde6214a155dbba9ebc555eec8b7218c7e1637d2fe532843238bb6a69bc041.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:1544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Tencent\TxGameAssistant\TGBDownloader\dr.dll

Filesize
74KB

MD5
2814acbd607ba47bdbcdf6ac3076ee95

SHA1
50ab892071bed2bb2365ca1d4bf5594e71c6b13b

SHA256
5904a7e4d97eeac939662c3638a0e145f64ff3dd0198f895c4bf0337595c6a67

SHA512
34c73014ffc8d38d6dd29f4f84c8f4f9ea971bc131f665f65b277f453504d5efc2d483a792cdea610c5e0544bf3997b132dcdbe37224912c5234c15cdb89d498

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