91fc7e6f543d75eb029777355435f14e939c5824bd70afc9de64db7dbc744265

Analysis

max time kernel
139s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
12/10/2023, 17:04

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

91fc7e6f543d75eb029777355435f14e939c5824bd70afc9de64db7dbc744265.exe
Size

3.8MB
MD5

f74481a5086b025992285b39d176ba86
SHA1

bdbc38e48f7441ad6355c9b92044175e6b4c0d63
SHA256

91fc7e6f543d75eb029777355435f14e939c5824bd70afc9de64db7dbc744265
SHA512

cfda1c64ff8280f967e68373e6af3c61cc4267d5ee39a2588df3511950d93c7af4aba641e4f5aec627f741d429451b642b8706335a98ac4f014b1aaf688c0dfa
SSDEEP

98304:UmXe6ygXLTjUy7nuaHr3dWa31XRbM5ZBYojqWk:UmuM3j17JhsvjqP

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
680	91fc7e6f543d75eb029777355435f14e939c5824bd70afc9de64db7dbc744265.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:	91fc7e6f543d75eb029777355435f14e939c5824bd70afc9de64db7dbc744265.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	91fc7e6f543d75eb029777355435f14e939c5824bd70afc9de64db7dbc744265.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
680	91fc7e6f543d75eb029777355435f14e939c5824bd70afc9de64db7dbc744265.exe
680	91fc7e6f543d75eb029777355435f14e939c5824bd70afc9de64db7dbc744265.exe

C:\Users\Admin\AppData\Local\Temp\91fc7e6f543d75eb029777355435f14e939c5824bd70afc9de64db7dbc744265.exe
"C:\Users\Admin\AppData\Local\Temp\91fc7e6f543d75eb029777355435f14e939c5824bd70afc9de64db7dbc744265.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:680

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