Malware Analysis Report

2025-01-03 03:02

Sample ID 241120-31ypsa1jhn
Target e11547db899baadb5a40d9e624779d42a76ae3a7f3fcfe69c94e9e0d4783c32e.exe
SHA256 e11547db899baadb5a40d9e624779d42a76ae3a7f3fcfe69c94e9e0d4783c32e
Tags
darkvnc discovery rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

e11547db899baadb5a40d9e624779d42a76ae3a7f3fcfe69c94e9e0d4783c32e

Threat Level: Known bad

The file e11547db899baadb5a40d9e624779d42a76ae3a7f3fcfe69c94e9e0d4783c32e.exe was found to be: Known bad.

Malicious Activity Summary

darkvnc discovery rat

DarkVNC

Darkvnc family

DarkVNC payload

Suspicious use of SetThreadContext

System Location Discovery: System Language Discovery

Unsigned PE

Program crash

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-20 23:59

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-20 23:59

Reported

2024-11-21 00:01

Platform

win7-20241010-en

Max time kernel

114s

Max time network

109s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e11547db899baadb5a40d9e624779d42a76ae3a7f3fcfe69c94e9e0d4783c32e.dll,#1

Signatures

DarkVNC

rat darkvnc

Darkvnc family

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
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N/A N/A N/A N/A
N/A N/A N/A N/A
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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 1104 set thread context of 2736 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\WerFault.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

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 2024 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2024 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2024 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2024 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2024 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2024 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2024 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1104 wrote to memory of 2736 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\WerFault.exe
PID 1104 wrote to memory of 2736 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\WerFault.exe
PID 1104 wrote to memory of 2736 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\WerFault.exe
PID 1104 wrote to memory of 2736 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\WerFault.exe
PID 1104 wrote to memory of 2736 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\WerFault.exe
PID 1104 wrote to memory of 2736 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\WerFault.exe
PID 1104 wrote to memory of 2736 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\WerFault.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e11547db899baadb5a40d9e624779d42a76ae3a7f3fcfe69c94e9e0d4783c32e.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e11547db899baadb5a40d9e624779d42a76ae3a7f3fcfe69c94e9e0d4783c32e.dll,#1

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe

Network

Country Destination Domain Proto
US 23.83.133.126:443 tcp
US 23.83.133.126:443 tcp
US 23.83.133.126:443 tcp
US 23.83.133.126:443 tcp

Files

memory/1104-2-0x00000000746E0000-0x00000000748D1000-memory.dmp

memory/1104-3-0x00000000746E0000-0x00000000748D1000-memory.dmp

memory/1104-0-0x0000000074833000-0x0000000074837000-memory.dmp

memory/2736-4-0x000007FFFFFD4000-0x000007FFFFFD5000-memory.dmp

memory/2736-6-0x0000000001B60000-0x0000000001C2A000-memory.dmp

memory/2736-5-0x0000000000080000-0x0000000000081000-memory.dmp

memory/2736-11-0x0000000001B60000-0x0000000001C2A000-memory.dmp

memory/2736-10-0x0000000001B60000-0x0000000001C2A000-memory.dmp

memory/2736-14-0x0000000001B60000-0x0000000001C2A000-memory.dmp

memory/2736-12-0x0000000001B60000-0x0000000001C2A000-memory.dmp

memory/2736-13-0x0000000001B60000-0x0000000001C2A000-memory.dmp

memory/1104-15-0x00000000746E0000-0x00000000748D1000-memory.dmp

memory/2736-16-0x0000000001B60000-0x0000000001C2A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-20 23:59

Reported

2024-11-21 00:01

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

100s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e11547db899baadb5a40d9e624779d42a76ae3a7f3fcfe69c94e9e0d4783c32e.dll,#1

Signatures

DarkVNC

rat darkvnc

Darkvnc family

darkvnc

DarkVNC payload

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

Program crash

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1436 wrote to memory of 2440 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1436 wrote to memory of 2440 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1436 wrote to memory of 2440 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2440 wrote to memory of 1644 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\WerFault.exe
PID 2440 wrote to memory of 1644 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\system32\WerFault.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e11547db899baadb5a40d9e624779d42a76ae3a7f3fcfe69c94e9e0d4783c32e.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e11547db899baadb5a40d9e624779d42a76ae3a7f3fcfe69c94e9e0d4783c32e.dll,#1

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2440 -ip 2440

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2440 -s 724

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
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 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 96.136.73.23.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

memory/2440-0-0x00000000752A3000-0x00000000752A7000-memory.dmp

memory/2440-1-0x0000000075150000-0x0000000075341000-memory.dmp

memory/2440-3-0x0000000075150000-0x0000000075341000-memory.dmp