f914b13bf8598d479fc3182a51060619a5e3c01be3c485e4b25e3fe21474476b

Analysis

max time kernel
142s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
02/09/2023, 18:41

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

f914b13bf8598d479fc3182a51060619a5e3c01be3c485e4b25e3fe21474476b.exe
Size

3.6MB
MD5

9fd1e609a7ff4afd2814e8d5f60214ce
SHA1

ba2d51541ea232c23c6806ff6668525ca845b64e
SHA256

f914b13bf8598d479fc3182a51060619a5e3c01be3c485e4b25e3fe21474476b
SHA512

979b236e1df1b8fd208b1221ce25d25b16adb82ed8e20764d56400d9617b9f1cf030ca8411a6c18f016077cdf56334288646f5af925c17e58edc2e4b939638f0
SSDEEP

49152:lEjEamQb2OguN8Dfk5JEG14wv2QwnN4iTapOcaPKfjtD8cEOxeuxzS2hPV5T1gWm:lEjlmQbfgSgwvSnN4iVJuV0xNx+/UPq2

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
2648	f914b13bf8598d479fc3182a51060619a5e3c01be3c485e4b25e3fe21474476b.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:	f914b13bf8598d479fc3182a51060619a5e3c01be3c485e4b25e3fe21474476b.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	f914b13bf8598d479fc3182a51060619a5e3c01be3c485e4b25e3fe21474476b.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2648	f914b13bf8598d479fc3182a51060619a5e3c01be3c485e4b25e3fe21474476b.exe
2648	f914b13bf8598d479fc3182a51060619a5e3c01be3c485e4b25e3fe21474476b.exe

C:\Users\Admin\AppData\Local\Temp\f914b13bf8598d479fc3182a51060619a5e3c01be3c485e4b25e3fe21474476b.exe
"C:\Users\Admin\AppData\Local\Temp\f914b13bf8598d479fc3182a51060619a5e3c01be3c485e4b25e3fe21474476b.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:2648

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

Loading Replay Monitor...

Downloads

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

Filesize
74KB

MD5
2814acbd607ba47bdbcdf6ac3076ee95

SHA1
50ab892071bed2bb2365ca1d4bf5594e71c6b13b

SHA256
5904a7e4d97eeac939662c3638a0e145f64ff3dd0198f895c4bf0337595c6a67

SHA512
34c73014ffc8d38d6dd29f4f84c8f4f9ea971bc131f665f65b277f453504d5efc2d483a792cdea610c5e0544bf3997b132dcdbe37224912c5234c15cdb89d498

Download Submit