Malware Analysis Report

2025-01-18 21:39

Sample ID 240415-regctsad5t
Target f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118
SHA256 1e69d355dd8393dead16a09915b4733175d083860da3a04ad87e0182a636fc14
Tags
adware persistence stealer
score
6/10

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
6/10

SHA256

1e69d355dd8393dead16a09915b4733175d083860da3a04ad87e0182a636fc14

Threat Level: Shows suspicious behavior

The file f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

adware persistence stealer

Adds Run key to start application

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 14:06

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-15 14:06

Reported

2024-04-15 14:08

Platform

win7-20231129-en

Max time kernel

121s

Max time network

123s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118.dll

Signatures

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\{5a8e08ac-6bf5-74ef-9d80-b09eba3f3238} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118.dll\" DllStub" C:\Windows\SysWOW64\regsvr32.exe N/A

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{138a68b4-dafb-6de6-8285-a921b63bdedc} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{138a68b4-dafb-6de6-8285-a921b63bdedc}\NoExplorer = "\"\"" C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{138a68b4-dafb-6de6-8285-a921b63bdedc}\InProcServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{138a68b4-dafb-6de6-8285-a921b63bdedc} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{138a68b4-dafb-6de6-8285-a921b63bdedc}\ = "agadoo browser enhancer" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{138a68b4-dafb-6de6-8285-a921b63bdedc}\InProcServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{138a68b4-dafb-6de6-8285-a921b63bdedc}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2996 wrote to memory of 1248 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2996 wrote to memory of 1248 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2996 wrote to memory of 1248 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2996 wrote to memory of 1248 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2996 wrote to memory of 1248 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2996 wrote to memory of 1248 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 2996 wrote to memory of 1248 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\f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118.dll

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-15 14:06

Reported

2024-04-15 14:08

Platform

win10v2004-20240412-en

Max time kernel

93s

Max time network

114s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118.dll

Signatures

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\{0ca695cd-9d5d-84ca-c63c-03dc7372ee68} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118.dll\" DllStub" C:\Windows\SysWOW64\regsvr32.exe N/A

Installs/modifies Browser Helper Object

stealer adware
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{54957b8e-1b02-022e-af41-3f25a172ebf8} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{54957b8e-1b02-022e-af41-3f25a172ebf8}\NoExplorer = "\"\"" C:\Windows\SysWOW64\regsvr32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{54957b8e-1b02-022e-af41-3f25a172ebf8} C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{54957b8e-1b02-022e-af41-3f25a172ebf8}\ = "agadoo browser enhancer" C:\Windows\SysWOW64\regsvr32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{54957b8e-1b02-022e-af41-3f25a172ebf8}\InProcServer32 C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{54957b8e-1b02-022e-af41-3f25a172ebf8}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118.dll" C:\Windows\SysWOW64\regsvr32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{54957b8e-1b02-022e-af41-3f25a172ebf8}\InProcServer32\ThreadingModel = "Apartment" C:\Windows\SysWOW64\regsvr32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4348 wrote to memory of 4004 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4348 wrote to memory of 4004 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 4348 wrote to memory of 4004 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\f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\f13d983a16ae706c9cbc6a89d58271e2_JaffaCakes118.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 21.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
NL 23.62.61.72:443 www.bing.com tcp
US 8.8.8.8:53 240.143.123.92.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 72.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 17.143.109.104.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

N/A