75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b

Analysis

max time kernel
133s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 05:09

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General

Target

75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe
Size

3.4MB
MD5

0cef5157cd3ba2ce9d78191f00207418
SHA1

1c767132075e6c0ea02decba489d2088750d7ad3
SHA256

75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b
SHA512

ef3f487f458bb40c62f7db393ae1c9ad8c26e596c13911c6d25920db04b3979f4c0b88d2ff0b50adb01548d46c6197d8e11737c8927d77c96075382ed9862aa6
SSDEEP

49152:gEjEamQb2OguN8Dfk5JEG14wv2QwnN4iTapOcaPKfjtD8cEOxeuxzS2hPV5T1gWA:gEjlmQbfgSgwvSnN4iVJuS0xJdzYUqJ

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

Processes:

75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe

pid process

2488 75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.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:

75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe

description ioc process

File opened (read-only) \??\F: 75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.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:

75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe

description ioc process

File opened for modification \??\PhysicalDrive0 75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe

description	ioc	process
File opened (read-only)	\??\F:	75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe

pid	process
2488	75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe
2488	75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe

C:\Users\Admin\AppData\Local\Temp\75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe
"C:\Users\Admin\AppData\Local\Temp\75f3cc169020d986ca557134fc35d613831a62f31ea6042decf0229dc2d0a22b.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:2488

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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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