3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f

Analysis

max time kernel
93s
max time network
99s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
03-06-2024 03:33

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General

Target

3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe
Size

3.5MB
MD5

27fb9b1125fbb93ee23efc459b80420d
SHA1

992e7ac9da871c26de56262c9e7b47fb7fd0c437
SHA256

3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f
SHA512

c76a854298644d57c44c8fdacd7035c44a4c851caeef50131aaa5ab29b2ff56704e9560fa99dc628e397269f818d18c675f90d5305c38b9fe09d20bdcf8b1794
SSDEEP

49152:yEjEamQb2OguN8Dfk5JEG14wv2QwnN4iTapOcaPKfjtD8cEOxeuxzS2hPV5T1gWI:yEjlmQbfgSgwvSnN4iVJub0xtrNIJqj

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

Processes:

3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe

pid process

4268 3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.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:

3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe

description ioc process

File opened (read-only) \??\F: 3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.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:

3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe

description ioc process

File opened for modification \??\PhysicalDrive0 3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe

description	ioc	process
File opened (read-only)	\??\F:	3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe

pid	process
4268	3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe
4268	3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe

C:\Users\Admin\AppData\Local\Temp\3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe
"C:\Users\Admin\AppData\Local\Temp\3d9fbafb59a2713fc563d9abbeb989d3a870817d2571cec436dfdf1ec4e7595f.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:4268

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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