8bdad45a1cc90ce1d7df88c43e05887cae88d815df4c4dacd784b6ff2bfe3d9c

Analysis

max time kernel
164s
max time network
183s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04/01/2024, 19:24

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General

Target

8bdad45a1cc90ce1d7df88c43e05887cae88d815df4c4dacd784b6ff2bfe3d9c.exe
Size

3.6MB
MD5

f9836b241b44a23ebac79d207f6b8959
SHA1

6ed211eb2e938c9f72ae45b1a6bd341e72c1d437
SHA256

8bdad45a1cc90ce1d7df88c43e05887cae88d815df4c4dacd784b6ff2bfe3d9c
SHA512

4bd1871c1e3195e8fc64dcb4f8fe66dffbc5d938fd193ee8b2f15a61cd9d374f8af75009f2a61b29704d546399bc663e08482a413f40a43369c6749a300e35cd
SSDEEP

49152:P4zQ4QeBJkcukw3PbmNQPtU2ELDdlkUGI0cIPMg9rVvs6JWNkrlpJsPs4Ta/ZyTG:P4U4QDwiGQPlELDCvdWeJLuF5ql

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
1388	8bdad45a1cc90ce1d7df88c43e05887cae88d815df4c4dacd784b6ff2bfe3d9c.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:	8bdad45a1cc90ce1d7df88c43e05887cae88d815df4c4dacd784b6ff2bfe3d9c.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	8bdad45a1cc90ce1d7df88c43e05887cae88d815df4c4dacd784b6ff2bfe3d9c.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1388	8bdad45a1cc90ce1d7df88c43e05887cae88d815df4c4dacd784b6ff2bfe3d9c.exe
1388	8bdad45a1cc90ce1d7df88c43e05887cae88d815df4c4dacd784b6ff2bfe3d9c.exe

C:\Users\Admin\AppData\Local\Temp\8bdad45a1cc90ce1d7df88c43e05887cae88d815df4c4dacd784b6ff2bfe3d9c.exe
"C:\Users\Admin\AppData\Local\Temp\8bdad45a1cc90ce1d7df88c43e05887cae88d815df4c4dacd784b6ff2bfe3d9c.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:1388

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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