Malware Analysis Report

2025-01-18 21:44

Sample ID 240415-exa8baed22
Target f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118
SHA256 9e355ebbac6b249350549565790d69a5e08d0a1b89ca4045d83fe27726dcee68
Tags
adware stealer aspackv2 bootkit persistence
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

9e355ebbac6b249350549565790d69a5e08d0a1b89ca4045d83fe27726dcee68

Threat Level: Shows suspicious behavior

The file f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

adware stealer aspackv2 bootkit persistence

ASPack v2.12-2.42

Writes to the Master Boot Record (MBR)

Installs/modifies Browser Helper Object

Unsigned PE

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-15 04:18

Signatures

ASPack v2.12-2.42

aspackv2
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 04:18

Reported

2024-04-15 04:21

Platform

win10v2004-20240412-en

Max time kernel

93s

Max time network

113s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1} C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}\wversion = "3.4.7" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\ = "WebHelper Class" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\Software\Classes\WOW6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\Software\Classes\WOW6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}\webbrowser = "{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\Software\Classes\WOW6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.key C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1748 wrote to memory of 2336 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1748 wrote to memory of 2336 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1748 wrote to memory of 2336 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/2336-0-0x0000000010000000-0x0000000010035000-memory.dmp

memory/2336-1-0x0000000010000000-0x0000000010035000-memory.dmp

memory/2336-2-0x0000000000790000-0x00000000007C0000-memory.dmp

memory/2336-3-0x0000000000E70000-0x0000000000E73000-memory.dmp

memory/2336-4-0x0000000000770000-0x0000000000771000-memory.dmp

memory/2336-5-0x0000000000750000-0x0000000000751000-memory.dmp

memory/2336-6-0x0000000000760000-0x0000000000761000-memory.dmp

memory/2336-7-0x0000000000ED0000-0x0000000000ED1000-memory.dmp

memory/2336-8-0x0000000000EE0000-0x0000000000EE1000-memory.dmp

memory/2336-9-0x0000000000F00000-0x0000000000F01000-memory.dmp

memory/2336-10-0x0000000000F20000-0x0000000000F21000-memory.dmp

memory/2336-11-0x0000000000F40000-0x0000000000F41000-memory.dmp

memory/2336-12-0x0000000000FA0000-0x0000000000FA1000-memory.dmp

memory/2336-13-0x0000000000FA0000-0x0000000000FA1000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 04:18

Reported

2024-04-15 04:21

Platform

win7-20240221-en

Max time kernel

120s

Max time network

120s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll

Signatures

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1} C:\Windows\SysWOW64\regsvr32.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1} C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}\wversion = "3.4.7" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\ = "WebHelper Class" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.key C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\Software\Classes\Wow6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{F9BA1AA9-CAD4-4C14-BDE6-922DFF5F6F38}\webbrowser = "{986488AF-13D5-9DDF-4FEF-9FB88698CFC1}" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1932 wrote to memory of 2492 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1932 wrote to memory of 2492 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1932 wrote to memory of 2492 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1932 wrote to memory of 2492 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1932 wrote to memory of 2492 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1932 wrote to memory of 2492 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 1932 wrote to memory of 2492 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f04a2e3a113ee4dcb43f1b8f54130fce_JaffaCakes118.dll

Network

N/A

Files

memory/2492-0-0x0000000010000000-0x0000000010035000-memory.dmp

memory/2492-1-0x00000000001A0000-0x00000000001D0000-memory.dmp

memory/2492-2-0x0000000000170000-0x0000000000173000-memory.dmp