a3b499cc69aa3282cf404983adb8af2c8dc5fd90294b3dba96143e207544b012

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
22/01/2024, 19:46

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General

Target

a3b499cc69aa3282cf404983adb8af2c8dc5fd90294b3dba96143e207544b012.exe
Size

3.5MB
MD5

52b11eab2f0a06429555f31bceddab8c
SHA1

cc35c3a5a05dd3aab5a29a097a4b51a594f47f7b
SHA256

a3b499cc69aa3282cf404983adb8af2c8dc5fd90294b3dba96143e207544b012
SHA512

63fd30bb08b096eee63f8b6f306f6c7b31eabf43935382a4c8cf7ea6336c537c5e52ddc5f4f5267dc20b8d583acfc50f6dca5868eaaeab895e1f8a1ec3c71c65
SSDEEP

98304:iev6MvU30Ls8j2N9yUdlgi/KrN7NIq57YN:ievy307ab2ZNIq5u

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
1900	a3b499cc69aa3282cf404983adb8af2c8dc5fd90294b3dba96143e207544b012.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:	a3b499cc69aa3282cf404983adb8af2c8dc5fd90294b3dba96143e207544b012.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	a3b499cc69aa3282cf404983adb8af2c8dc5fd90294b3dba96143e207544b012.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1900	a3b499cc69aa3282cf404983adb8af2c8dc5fd90294b3dba96143e207544b012.exe

C:\Users\Admin\AppData\Local\Temp\a3b499cc69aa3282cf404983adb8af2c8dc5fd90294b3dba96143e207544b012.exe
"C:\Users\Admin\AppData\Local\Temp\a3b499cc69aa3282cf404983adb8af2c8dc5fd90294b3dba96143e207544b012.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:1900

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

\Users\Admin\AppData\Local\Tencent\TxGameAssistant\TGBDownloader\dr.dll

Filesize
74KB

MD5
2814acbd607ba47bdbcdf6ac3076ee95

SHA1
50ab892071bed2bb2365ca1d4bf5594e71c6b13b

SHA256
5904a7e4d97eeac939662c3638a0e145f64ff3dd0198f895c4bf0337595c6a67

SHA512
34c73014ffc8d38d6dd29f4f84c8f4f9ea971bc131f665f65b277f453504d5efc2d483a792cdea610c5e0544bf3997b132dcdbe37224912c5234c15cdb89d498

Download Submit
memory/1900-4-0x00000000000B0000-0x00000000000BA000-memory.dmp

Filesize
40KB

Download
memory/1900-5-0x00000000000B0000-0x00000000000BA000-memory.dmp

Filesize
40KB

Download
memory/1900-10-0x00000000000B0000-0x00000000000BA000-memory.dmp

Filesize
40KB

Download
memory/1900-11-0x00000000000B0000-0x00000000000BA000-memory.dmp

Filesize
40KB

Download