Malware Analysis Report

2024-12-07 01:57

Sample ID 241111-wjvhgatald
Target f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795N
SHA256 f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795
Tags
bootkit discovery persistence spyware stealer
score
8/10

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
8/10

SHA256

f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795

Threat Level: Likely malicious

The file f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795N was found to be: Likely malicious.

Malicious Activity Summary

bootkit discovery persistence spyware stealer

Blocklisted process makes network request

Reads user/profile data of web browsers

Enumerates connected drives

Writes to the Master Boot Record (MBR)

Adds Run key to start application

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Checks processor information in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-11 17:57

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-11 17:57

Reported

2024-11-11 17:59

Platform

win7-20241010-en

Max time kernel

118s

Max time network

119s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795N.dll,#1

Signatures

Reads user/profile data of web browsers

spyware stealer

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\sDisk = "C:\\Windows\\SysWOW64\\rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795N.dll\",SSL_clear" C:\Windows\SysWOW64\rundll32.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\w: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\z: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\i: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\u: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\k: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\q: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\t: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\y: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\a: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\e: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\h: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\l: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\o: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\s: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\v: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\b: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\g: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\n: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\p: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\r: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\x: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\j: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\m: C:\Windows\SysWOW64\rundll32.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PHYSICALDRIVE0 C:\Windows\SysWOW64\rundll32.exe N/A

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

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Windows\SysWOW64\rundll32.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2320 wrote to memory of 1572 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2320 wrote to memory of 1572 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2320 wrote to memory of 1572 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2320 wrote to memory of 1572 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2320 wrote to memory of 1572 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2320 wrote to memory of 1572 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2320 wrote to memory of 1572 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795N.dll,#1

Network

Country Destination Domain Proto
US 110.34.196.36:803 tcp
US 110.34.196.36:803 tcp
US 110.34.196.34:3204 tcp
US 110.34.196.35:805 tcp
US 110.34.196.35:805 tcp
US 110.34.196.35:805 tcp
US 110.34.196.35:805 tcp
US 110.34.196.34:3204 tcp
US 110.34.196.34:3204 tcp

Files

memory/1572-0-0x0000000010000000-0x0000000010059000-memory.dmp

memory/1572-1-0x0000000010000000-0x0000000010059000-memory.dmp

memory/1572-2-0x0000000010037000-0x0000000010038000-memory.dmp

memory/1572-3-0x0000000010000000-0x0000000010059000-memory.dmp

memory/1572-5-0x0000000010000000-0x0000000010059000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-11 17:57

Reported

2024-11-11 17:59

Platform

win10v2004-20241007-en

Max time kernel

117s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795N.dll,#1

Signatures

Reads user/profile data of web browsers

spyware stealer

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sDisk = "C:\\Windows\\SysWOW64\\rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795N.dll\",SSL_clear" C:\Windows\SysWOW64\rundll32.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\o: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\p: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\a: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\b: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\h: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\i: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\k: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\m: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\u: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\w: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\q: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\r: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\v: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\y: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\z: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\e: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\l: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\n: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\g: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\j: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\s: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\t: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\x: C:\Windows\SysWOW64\rundll32.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PHYSICALDRIVE0 C:\Windows\SysWOW64\rundll32.exe N/A

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

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\SysWOW64\rundll32.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 780 wrote to memory of 4876 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 780 wrote to memory of 4876 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 780 wrote to memory of 4876 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\f135531a4e85ab7a26c8baebd2d645c5949469fce76616c1477555e6fe61a795N.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 110.34.196.36:803 tcp
US 110.34.196.34:3204 tcp
US 110.34.196.35:805 tcp
US 110.34.196.35:805 tcp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 73.190.18.2.in-addr.arpa udp
US 110.34.196.35:805 tcp
US 110.34.196.34:3204 tcp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 110.34.196.34:3204 tcp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 110.34.196.34:3204 tcp

Files

memory/4876-0-0x0000000010000000-0x0000000010059000-memory.dmp

memory/4876-1-0x0000000010037000-0x0000000010038000-memory.dmp

memory/4876-2-0x0000000010000000-0x0000000010059000-memory.dmp

memory/4876-4-0x0000000010000000-0x0000000010059000-memory.dmp