Malware Analysis Report

2024-09-22 16:45

Sample ID 231102-qypymsee84
Target f3ccf5ab10c55af91804220c822086180e9b950709f92cfa4c2c33667a4b54f8
SHA256 f3ccf5ab10c55af91804220c822086180e9b950709f92cfa4c2c33667a4b54f8
Tags
rat darkvnc
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

f3ccf5ab10c55af91804220c822086180e9b950709f92cfa4c2c33667a4b54f8

Threat Level: Known bad

The file f3ccf5ab10c55af91804220c822086180e9b950709f92cfa4c2c33667a4b54f8 was found to be: Known bad.

Malicious Activity Summary

rat darkvnc

DarkVNC

DarkVNC payload

Darkvnc family

DarkVNC payload

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2023-11-02 13:40

Signatures

DarkVNC payload

rat
Description Indicator Process Target
N/A N/A N/A N/A

Darkvnc family

darkvnc

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-11-02 13:40

Reported

2023-11-02 13:43

Platform

win7-20231025-en

Max time kernel

119s

Max time network

137s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f3ccf5ab10c55af91804220c822086180e9b950709f92cfa4c2c33667a4b54f8.dll,#1

Signatures

DarkVNC

rat darkvnc

DarkVNC payload

rat
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2948 set thread context of 2804 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\notepad.exe

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2168 wrote to memory of 2948 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2168 wrote to memory of 2948 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2168 wrote to memory of 2948 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2168 wrote to memory of 2948 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2168 wrote to memory of 2948 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2168 wrote to memory of 2948 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2168 wrote to memory of 2948 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2948 wrote to memory of 2804 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\notepad.exe
PID 2948 wrote to memory of 2804 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\notepad.exe
PID 2948 wrote to memory of 2804 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\notepad.exe
PID 2948 wrote to memory of 2804 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\notepad.exe
PID 2948 wrote to memory of 2804 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\notepad.exe
PID 2948 wrote to memory of 2804 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\notepad.exe
PID 2948 wrote to memory of 2804 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\notepad.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f3ccf5ab10c55af91804220c822086180e9b950709f92cfa4c2c33667a4b54f8.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f3ccf5ab10c55af91804220c822086180e9b950709f92cfa4c2c33667a4b54f8.dll,#1

C:\Windows\system32\notepad.exe

C:\Windows\system32\notepad.exe -k

Network

Country Destination Domain Proto
PL 37.28.157.33:443 tcp
PL 37.28.157.33:443 tcp

Files

memory/2804-0-0x00000000000F0000-0x00000000000F1000-memory.dmp

memory/2804-2-0x000007FFFFFD7000-0x000007FFFFFD8000-memory.dmp

memory/2804-3-0x00000000000F0000-0x00000000000F1000-memory.dmp

memory/2804-5-0x0000000001B80000-0x0000000001C49000-memory.dmp

memory/2804-9-0x0000000001B80000-0x0000000001C49000-memory.dmp

memory/2804-10-0x0000000001B80000-0x0000000001C49000-memory.dmp

memory/2804-11-0x0000000001B80000-0x0000000001C49000-memory.dmp

memory/2804-12-0x0000000001B80000-0x0000000001C49000-memory.dmp

memory/2804-13-0x0000000001B80000-0x0000000001C49000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-11-02 13:40

Reported

2023-11-02 13:43

Platform

win10v2004-20231023-en

Max time kernel

138s

Max time network

171s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f3ccf5ab10c55af91804220c822086180e9b950709f92cfa4c2c33667a4b54f8.dll,#1

Signatures

DarkVNC

rat darkvnc

DarkVNC payload

rat
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1048 set thread context of 1904 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\notepad.exe

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f3ccf5ab10c55af91804220c822086180e9b950709f92cfa4c2c33667a4b54f8.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f3ccf5ab10c55af91804220c822086180e9b950709f92cfa4c2c33667a4b54f8.dll,#1

C:\Windows\system32\notepad.exe

C:\Windows\system32\notepad.exe -k

Network

Country Destination Domain Proto
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 155.245.36.23.in-addr.arpa udp
PL 37.28.157.33:443 tcp
PL 37.28.157.33:443 tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 33.157.28.37.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 1.202.248.87.in-addr.arpa udp
US 8.8.8.8:53 9.179.89.13.in-addr.arpa udp

Files

memory/1904-2-0x0000000000F20000-0x0000000000FE9000-memory.dmp

memory/1904-3-0x0000000000F20000-0x0000000000FE9000-memory.dmp

memory/1904-1-0x0000000000FF0000-0x0000000000FF1000-memory.dmp

memory/1904-7-0x0000000000F20000-0x0000000000FE9000-memory.dmp

memory/1904-8-0x0000000000F20000-0x0000000000FE9000-memory.dmp

memory/1904-9-0x0000000000F20000-0x0000000000FE9000-memory.dmp

memory/1904-10-0x0000000000F20000-0x0000000000FE9000-memory.dmp

memory/1904-11-0x0000000000F20000-0x0000000000FE9000-memory.dmp