b214f84e359655b4696f3b6bf41b38933ba61ae6c7e4fa882e0f946316fc2277

Analysis

max time kernel
140s
max time network
103s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
07-05-2024 18:17

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General

Target

b214f84e359655b4696f3b6bf41b38933ba61ae6c7e4fa882e0f946316fc2277.exe
Size

3.6MB
MD5

e28da2c7fb9d0f709ac08fb88116cf49
SHA1

ecd7d2335a40495b70ce59715ac78abc49e0cdab
SHA256

b214f84e359655b4696f3b6bf41b38933ba61ae6c7e4fa882e0f946316fc2277
SHA512

1fa65cb934d31e5e1c73d19aee43ac9e70e07a7cfa2df5da06df2571269913d944900ad7d516791ab4e25f2afc6276b6fb5d7496ddec1ae2b7b038e553827793
SSDEEP

49152:N08OhxtUg9OUi82w6aQp9dgS1GUL38XhCOYc3iJXe9emEPGKOPkQThMYRPnm7LBD:N08vdsGaQNgS1C6eJn4T2qF

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
1988	b214f84e359655b4696f3b6bf41b38933ba61ae6c7e4fa882e0f946316fc2277.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

description	ioc	Process
File opened (read-only)	\??\F:	b214f84e359655b4696f3b6bf41b38933ba61ae6c7e4fa882e0f946316fc2277.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

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	b214f84e359655b4696f3b6bf41b38933ba61ae6c7e4fa882e0f946316fc2277.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1988	b214f84e359655b4696f3b6bf41b38933ba61ae6c7e4fa882e0f946316fc2277.exe
1988	b214f84e359655b4696f3b6bf41b38933ba61ae6c7e4fa882e0f946316fc2277.exe

C:\Users\Admin\AppData\Local\Temp\b214f84e359655b4696f3b6bf41b38933ba61ae6c7e4fa882e0f946316fc2277.exe
"C:\Users\Admin\AppData\Local\Temp\b214f84e359655b4696f3b6bf41b38933ba61ae6c7e4fa882e0f946316fc2277.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:1988

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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