4ca8bce19cbe6e1e5d3634d15c28cb168183ea8731c9f74635a09663830c34e8

Analysis

max time kernel
117s
max time network
120s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
23-11-2023 18:58

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General

Target

4ca8bce19cbe6e1e5d3634d15c28cb168183ea8731c9f74635a09663830c34e8.exe
Size

3.6MB
MD5

c7faa1c1991e7c86ae176692df0620b5
SHA1

dcaaa3e4daa4a54a02d2026192b69786dc7bd89b
SHA256

4ca8bce19cbe6e1e5d3634d15c28cb168183ea8731c9f74635a09663830c34e8
SHA512

d891fcb039ca0d36fbd623b27f745c73f42c29d6267e852a4b559d3e3761f37cb6a15356ba757f1941ac746df4941f1c79d6c45b259100d6969e3effba860103
SSDEEP

49152:B08OhxtUg9OUi82w6aQp9dgS1GUL38XhCOYc3iJXe9emEPGKOPkQThMYRrnm7LBy:B08vdsGaQNgS1C6e5nBraqB

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
1728	4ca8bce19cbe6e1e5d3634d15c28cb168183ea8731c9f74635a09663830c34e8.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:	4ca8bce19cbe6e1e5d3634d15c28cb168183ea8731c9f74635a09663830c34e8.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	4ca8bce19cbe6e1e5d3634d15c28cb168183ea8731c9f74635a09663830c34e8.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1728	4ca8bce19cbe6e1e5d3634d15c28cb168183ea8731c9f74635a09663830c34e8.exe

C:\Users\Admin\AppData\Local\Temp\4ca8bce19cbe6e1e5d3634d15c28cb168183ea8731c9f74635a09663830c34e8.exe
"C:\Users\Admin\AppData\Local\Temp\4ca8bce19cbe6e1e5d3634d15c28cb168183ea8731c9f74635a09663830c34e8.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:1728

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/1728-4-0x00000000001A0000-0x00000000001AA000-memory.dmp

Filesize
40KB

Download
memory/1728-5-0x00000000001A0000-0x00000000001AA000-memory.dmp

Filesize
40KB

Download
memory/1728-10-0x00000000001A0000-0x00000000001AA000-memory.dmp

Filesize
40KB

Download
memory/1728-11-0x00000000001A0000-0x00000000001AA000-memory.dmp

Filesize
40KB

Download