28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8

Analysis

max time kernel
133s
max time network
104s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 04:48

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General

Target

28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe
Size

3.4MB
MD5

0a15e27e8ff4f65aa40962e34f07171e
SHA1

60ef38a55594521126745dc81116f0ab661f90cf
SHA256

28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8
SHA512

a114410c6212884d5dc165bb805b5761a6075e49072f190db97d678fa9ea41299b05223c6095bab39c58058e6a0d2a6544a0554cd1b20da83e75f0f668c0a8f4
SSDEEP

49152:hEjEamQb2OguN8Dfk5JEG14wv2QwnN4iTapOcaPKfjtD8cEOxeuxzS2hPV5T1gWx:hEjlmQbfgSgwvSnN4iVJuS0xJdzYUqA

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

Processes:

28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe

pid process

3944 28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.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:

28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe

description ioc process

File opened (read-only) \??\F: 28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.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:

28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe

description ioc process

File opened for modification \??\PhysicalDrive0 28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe

description	ioc	process
File opened (read-only)	\??\F:	28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe

pid	process
3944	28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe
3944	28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe

C:\Users\Admin\AppData\Local\Temp\28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe
"C:\Users\Admin\AppData\Local\Temp\28d86d9aa5ce8c810222c62ab65c1ee744b6694e7e9f466d4fb4f54978a4a9f8.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:3944

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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