b19e71cc7b5da37535f08125478001fc47d2182a96acd4c28c2528e9f73ae8cb

Analysis

max time kernel
142s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
23/09/2023, 18:05

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General

Target

b19e71cc7b5da37535f08125478001fc47d2182a96acd4c28c2528e9f73ae8cb.exe
Size

3.6MB
MD5

db5c7284a4671cd77b6cb44c06445c44
SHA1

5af6e093800623ae401900e2dbb64373c33b4271
SHA256

b19e71cc7b5da37535f08125478001fc47d2182a96acd4c28c2528e9f73ae8cb
SHA512

a0f267f6ce56243ac5596f486a8d24145341c5a672149df8ae870fb9f663f30cbe28e656cc24f4dec88c8fa555584d345c5de2bd3b7310123c9281f3c927be76
SSDEEP

49152:w08OhxtUg9OUi82w6aQp9dgS1GUL38XhCOYc3iJXe9emEPGKOPkQThMYRMnm7LBs:w08vdsGaQNgS1C6e6ngKpqw

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
1156	b19e71cc7b5da37535f08125478001fc47d2182a96acd4c28c2528e9f73ae8cb.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:	b19e71cc7b5da37535f08125478001fc47d2182a96acd4c28c2528e9f73ae8cb.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	b19e71cc7b5da37535f08125478001fc47d2182a96acd4c28c2528e9f73ae8cb.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1156	b19e71cc7b5da37535f08125478001fc47d2182a96acd4c28c2528e9f73ae8cb.exe
1156	b19e71cc7b5da37535f08125478001fc47d2182a96acd4c28c2528e9f73ae8cb.exe

C:\Users\Admin\AppData\Local\Temp\b19e71cc7b5da37535f08125478001fc47d2182a96acd4c28c2528e9f73ae8cb.exe
"C:\Users\Admin\AppData\Local\Temp\b19e71cc7b5da37535f08125478001fc47d2182a96acd4c28c2528e9f73ae8cb.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:1156

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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