f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
26/02/2025, 06:53

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General

Target

f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66.exe
Size

3.8MB
MD5

239b5f9cce3103a7824bc78b9b86e211
SHA1

1c2d96f1b3d3c96d30eaacd1b9be41b29f6b1fac
SHA256

f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66
SHA512

5ac7ed1a2ef23fb1230e33e6e29226cdc17ac57ce01510041ec1cfe9f2bf66a527fad7d433798b7f29827a572b9f2ab17cea4aa1ee65e5fb173a9f572c56a0f9
SSDEEP

98304:kEjlmQbfgSgwvSnN4iVJu+0xGZ6twFquI3rFqz:kEjgQPXqdEtwYf3rFqz

Score

7^/10

bootkit discovery persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
652	f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66.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:	f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66.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	f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
652	f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66.exe
652	f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66.exe

C:\Users\Admin\AppData\Local\Temp\f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66.exe
"C:\Users\Admin\AppData\Local\Temp\f77f9164b861fd934d352eebf6cd5a1d92446d5d4f80b5b9a3445774a96d5f66.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:652

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

System Location Discovery

T1614

System Language Discovery

T1614.001

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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