bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603

Analysis

max time kernel
118s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-02-2024 00:38

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General

Target

bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe
Size

3.8MB
MD5

126c03f6eec9630d9caf18fff179cea0
SHA1

8a0e6533246b3b9394dc20932d037114b7db1a07
SHA256

bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603
SHA512

5c0d7dc011444aca3f96118ab8f97c1985baf696c25287c9236c158c017c8ee4a636600960d8ad92ac6c1e139f000455e1c29750f59bad5276556d140cebd812
SSDEEP

98304:iEjlmQbfgSgwvSnN4iVJu+0xGZ6twFquI3rFq9:iEjgQPXqdEtwYf3rFq9

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

Processes:

bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe

pid process

1712 bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.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:

bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe

description ioc process

File opened (read-only) \??\F: bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.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:

bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe

description ioc process

File opened for modification \??\PhysicalDrive0 bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe

pid process

1712 bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe

pid	process
1712	bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe

description	ioc	process
File opened (read-only)	\??\F:	bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe

pid	process
1712	bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe

C:\Users\Admin\AppData\Local\Temp\bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe
"C:\Users\Admin\AppData\Local\Temp\bc2df11b6b093215759870f3e66066bef3612e8afdc05f3418a0a68c948c2603.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:1712

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

\Users\Admin\AppData\Local\Tencent\TxGameAssistant\TGBDownloader\dr.dll
Filesize
74KB

MD5
2814acbd607ba47bdbcdf6ac3076ee95

SHA1
50ab892071bed2bb2365ca1d4bf5594e71c6b13b

SHA256
5904a7e4d97eeac939662c3638a0e145f64ff3dd0198f895c4bf0337595c6a67

SHA512
34c73014ffc8d38d6dd29f4f84c8f4f9ea971bc131f665f65b277f453504d5efc2d483a792cdea610c5e0544bf3997b132dcdbe37224912c5234c15cdb89d498

Download Submit
memory/1712-4-0x0000000000160000-0x000000000016A000-memory.dmp

Filesize
40KB

Download
memory/1712-5-0x0000000000160000-0x000000000016A000-memory.dmp

Filesize
40KB

Download
memory/1712-10-0x0000000000160000-0x000000000016A000-memory.dmp

Filesize
40KB

Download
memory/1712-11-0x0000000000160000-0x000000000016A000-memory.dmp

Filesize
40KB

Download