4cc37020c8c53248e9322334549763e12ed7f58dad08b5b924c77f9166ca49fb

Analysis

max time kernel
9s
max time network
36s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
19-02-2023 22:08

Target

System/RGSS301.dll
Size

1.0MB
MD5

dd25855ac39d32da033902fc58fa210b
SHA1

0ffa23a4d0b81438a329258f5c8d3b3403f4aa94
SHA256

27647690ed16218cd988dd71069fdca67207515b2a2df775be361f0198ab6876
SHA512

07f7f7cb4eda2165b4b28456fb01d4edea6e3d5f305dde19256865777905a0d0bb1d13ce1194a8639d740f633ccf1507a1b87530644d5e2d512a86829195ae60
SSDEEP

24576:+pc8WbPqpzFwdPhet279ae3P7zqP2JzCNkX67Flr1nH0F3ia:+pc8W7qEdPhet2hae3HfJR2Uf

Score

6^/10

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
T1067

Processes:

rundll32.exe

description ioc process

File opened for modification \??\PhysicalDrive0 rundll32.exe

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

Modifies registry class 3 IoCs

Processes:

rundll32.exe

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

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

rundll32.exe

description	pid	process	target process
PID 1324 wrote to memory of 1784	1324	rundll32.exe	rundll32.exe
PID 1324 wrote to memory of 1784	1324	rundll32.exe	rundll32.exe
PID 1324 wrote to memory of 1784	1324	rundll32.exe	rundll32.exe
PID 1324 wrote to memory of 1784	1324	rundll32.exe	rundll32.exe
PID 1324 wrote to memory of 1784	1324	rundll32.exe	rundll32.exe
PID 1324 wrote to memory of 1784	1324	rundll32.exe	rundll32.exe
PID 1324 wrote to memory of 1784	1324	rundll32.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\System\RGSS301.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1324
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\System\RGSS301.dll,#1
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Modifies registry class
  PID:1784

Initial Access

Execution

Persistence

Bootkit

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

memory/1784-54-0x0000000000000000-mapping.dmp

Download
memory/1784-55-0x0000000076201000-0x0000000076203000-memory.dmp

Filesize
8KB

Download