8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
24-05-2024 03:46

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General

Target

8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe
Size

3.5MB
MD5

050bfea963be8e25ad7a04a07198936d
SHA1

6e24177fd9daf8f7979aaefd2d406a26adc9be6b
SHA256

8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1
SHA512

64aee4231e4cab19c2f958207ffcf391e006e1e32472559bf5973f82190170063c670aa0810a1731910dc48dd8d20751b31f3894ae16c818c16ef890580b26a5
SSDEEP

98304:nEjlmQbfgSgwvSnN4iVJur0xM/licQBq4:nEjgQPXq0/xQBq4

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

Processes:

8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe

pid process

2220 8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.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:

8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe

description ioc process

File opened (read-only) \??\F: 8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.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:

8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe

description ioc process

File opened for modification \??\PhysicalDrive0 8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe

pid process

2220 8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe

pid	process
2220	8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe

description	ioc	process
File opened (read-only)	\??\F:	8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe

pid	process
2220	8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe

C:\Users\Admin\AppData\Local\Temp\8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe
"C:\Users\Admin\AppData\Local\Temp\8c8258d4f436609fed0531466e8176c4a19ca3bee4c5dd80799c5f8735db4dc1.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:2220

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/2220-9-0x0000000000280000-0x000000000028A000-memory.dmp

Filesize
40KB

Download
memory/2220-8-0x0000000000280000-0x000000000028A000-memory.dmp

Filesize
40KB

Download
memory/2220-11-0x0000000000280000-0x000000000028A000-memory.dmp

Filesize
40KB

Download
memory/2220-10-0x0000000000280000-0x000000000028A000-memory.dmp

Filesize
40KB

Download