Malware Analysis Report

2024-11-13 18:05

Sample ID 241109-1xzfsssmax
Target 9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642bN
SHA256 9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642b
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

9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642b

Threat Level: Likely malicious

The file 9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642bN 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 AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 22:02

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 22:02

Reported

2024-11-09 22:04

Platform

win7-20240903-en

Max time kernel

120s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642bN.dll,#1

Signatures

Blocklisted process makes network request

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
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\EM = "C:\\Windows\\SysWOW64\\rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642bN.dll\",ExitModule" C:\Windows\SysWOW64\rundll32.exe N/A

Enumerates connected drives

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

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 3028 wrote to memory of 2680 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 2680 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 2680 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 2680 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 2680 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 2680 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3028 wrote to memory of 2680 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\9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642bN.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642bN.dll,#1

Network

Country Destination Domain Proto
US 107.163.43.235:12388 107.163.43.235 tcp
US 107.163.43.143:12388 107.163.43.143 tcp
US 8.8.8.8:53 host123.zz.am udp
US 107.163.43.236:10289 tcp
US 107.163.43.236:10289 tcp
US 107.163.43.236:10289 tcp
US 107.163.43.236:10289 tcp

Files

memory/2680-0-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2680-1-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2680-2-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2680-6-0x0000000010036000-0x000000001004D000-memory.dmp

memory/2680-7-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2680-8-0x0000000010036000-0x000000001004D000-memory.dmp

memory/2680-9-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2680-12-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2680-13-0x0000000010000000-0x000000001004D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 22:02

Reported

2024-11-09 22:04

Platform

win10v2004-20241007-en

Max time kernel

116s

Max time network

119s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642bN.dll,#1

Signatures

Blocklisted process makes network request

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
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EM = "C:\\Windows\\SysWOW64\\rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642bN.dll\",ExitModule" C:\Windows\SysWOW64\rundll32.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\n: 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) \??\a: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\e: 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) \??\m: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\v: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\x: 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) \??\y: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\b: 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) \??\q: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\r: C:\Windows\SysWOW64\rundll32.exe N/A
File opened (read-only) \??\z: 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) \??\p: 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 840 wrote to memory of 2360 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 840 wrote to memory of 2360 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 840 wrote to memory of 2360 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\9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642bN.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\9ded03a9f9b345148f422a8aa0e91138c83fb968763c990939f508e0a41a642bN.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 107.163.43.235:12388 tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 107.163.43.143:12388 tcp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 host123.zz.am udp
US 107.163.43.236:10289 107.163.43.236 tcp
US 107.163.43.236:10289 107.163.43.236 tcp
US 8.8.8.8:53 236.43.163.107.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 host123.zz.am udp
US 8.8.8.8:53 host123.zz.am udp
US 8.8.8.8:53 host123.zz.am udp
US 107.163.43.236:10289 tcp
US 8.8.8.8:53 72.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 host123.zz.am udp
US 8.8.8.8:53 host123.zz.am udp
US 8.8.8.8:53 host123.zz.am udp
US 8.8.8.8:53 99.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 host123.zz.am udp
US 8.8.8.8:53 host123.zz.am udp
US 8.8.8.8:53 host123.zz.am udp

Files

memory/2360-0-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2360-1-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2360-6-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2360-5-0x0000000010036000-0x000000001004D000-memory.dmp

memory/2360-7-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2360-10-0x0000000010000000-0x000000001004D000-memory.dmp

memory/2360-12-0x0000000010000000-0x000000001004D000-memory.dmp