3f8ec6209a117ad6ec24eb748b20631b1b09ee65566e2b98fbe5a7021967e40a

Analysis

max time kernel
141s
max time network
119s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
30-06-2024 13:15

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General

Target

RGSS202E.dll
Size

832KB
MD5

73b5e408ef0b2a8d498107448ea119b6
SHA1

4623ded035d009a3a7a975035e2bd505386d6b11
SHA256

3f8ec6209a117ad6ec24eb748b20631b1b09ee65566e2b98fbe5a7021967e40a
SHA512

b4f4fdc318c231c5677910c43f0da45ad2fe9d333fd89b9912794b890fc4297e6201c6ebfd90b8459cd6130809e05229ae7e0a9119bebf6298f20fc6ad2c81cd
SSDEEP

24576:nyctOF+OJjkh/cR5vmEhuBFm62+Ze3JWPCVBO:pO0i+EYBXzZJiO

Score

6^/10

bootkit persistence

Malware Config

Signatures

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:

rundll32.exe

description ioc process

File opened for modification \??\PhysicalDrive0 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2896 2604 WerFault.exe rundll32.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	rundll32.exe

pid	pid_target	process	target process
2896	2604	WerFault.exe	rundll32.exe

Modifies registry class 3 IoCs

Processes:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.key	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile"	rundll32.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1028 wrote to memory of 2604	1028	rundll32.exe	rundll32.exe
PID 1028 wrote to memory of 2604	1028	rundll32.exe	rundll32.exe
PID 1028 wrote to memory of 2604	1028	rundll32.exe	rundll32.exe
PID 1028 wrote to memory of 2604	1028	rundll32.exe	rundll32.exe
PID 1028 wrote to memory of 2604	1028	rundll32.exe	rundll32.exe
PID 1028 wrote to memory of 2604	1028	rundll32.exe	rundll32.exe
PID 1028 wrote to memory of 2604	1028	rundll32.exe	rundll32.exe
PID 2604 wrote to memory of 2896	2604	rundll32.exe	WerFault.exe
PID 2604 wrote to memory of 2896	2604	rundll32.exe	WerFault.exe
PID 2604 wrote to memory of 2896	2604	rundll32.exe	WerFault.exe
PID 2604 wrote to memory of 2896	2604	rundll32.exe	WerFault.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\RGSS202E.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1028

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\RGSS202E.dll,#1
2⤵
- Writes to the Master Boot Record (MBR)
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2604

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2604 -s 272
3⤵
- Program crash
PID:2896

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/2604-0-0x0000000010000000-0x00000000101FB000-memory.dmp

Filesize
2.0MB

Download
memory/2604-1-0x0000000010000000-0x00000000101FB000-memory.dmp

Filesize
2.0MB

Download
memory/2604-3-0x00000000101D3000-0x00000000101D4000-memory.dmp

Filesize
4KB

Download
memory/2604-4-0x0000000010000000-0x00000000101FB000-memory.dmp

Filesize
2.0MB

Download
memory/2604-2-0x00000000001E0000-0x0000000000215000-memory.dmp

Filesize
212KB

Download
memory/2604-5-0x0000000010000000-0x00000000101FB000-memory.dmp

Filesize
2.0MB

Download
memory/2604-7-0x00000000001E0000-0x0000000000215000-memory.dmp

Filesize
212KB

Download
memory/2604-8-0x00000000101D3000-0x00000000101D4000-memory.dmp

Filesize
4KB

Download