8e607e890b07438245c32f9d94899a4f49d992025654a558a9fc358e9ba9645f

Analysis

max time kernel
120s
max time network
125s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
02/09/2023, 18:51

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General

Target

8e607e890b07438245c32f9d94899a4f49d992025654a558a9fc358e9ba9645f.exe
Size

3.8MB
MD5

dccfca199e81b58395e63f7261cb0ec5
SHA1

5b109daaa79eac973be96a20e3242f9a51d20e86
SHA256

8e607e890b07438245c32f9d94899a4f49d992025654a558a9fc358e9ba9645f
SHA512

f4db5d523574c0583eedf648c602c184db62ac83d059afbc8a3aa432ff8afb7df7d462072f7e4d470644857cae058d798b349b3829ed423f2cb960079d4c5318
SSDEEP

98304:LmXe6ygXLTjUy7nuaHr3dWap1NV6z/qeYvFqWH:LmuM3j17jNwzCHvFq0

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
2780	8e607e890b07438245c32f9d94899a4f49d992025654a558a9fc358e9ba9645f.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:	8e607e890b07438245c32f9d94899a4f49d992025654a558a9fc358e9ba9645f.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	8e607e890b07438245c32f9d94899a4f49d992025654a558a9fc358e9ba9645f.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2780	8e607e890b07438245c32f9d94899a4f49d992025654a558a9fc358e9ba9645f.exe

C:\Users\Admin\AppData\Local\Temp\8e607e890b07438245c32f9d94899a4f49d992025654a558a9fc358e9ba9645f.exe
"C:\Users\Admin\AppData\Local\Temp\8e607e890b07438245c32f9d94899a4f49d992025654a558a9fc358e9ba9645f.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:2780

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/2780-5-0x0000000000280000-0x000000000028A000-memory.dmp

Filesize
40KB

Download
memory/2780-4-0x0000000000280000-0x000000000028A000-memory.dmp

Filesize
40KB

Download
memory/2780-11-0x0000000000280000-0x000000000028A000-memory.dmp

Filesize
40KB

Download
memory/2780-10-0x0000000000280000-0x000000000028A000-memory.dmp

Filesize
40KB

Download