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 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/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