Malware Analysis Report

2025-03-14 23:13

Sample ID 240406-3szxwaee5s
Target e393866f73ea17a9112ff6a58bd603c1_JaffaCakes118
SHA256 1ce8d5f8f497a2994b67de5e983c71bbe622e86f0935cb3b5fbf738082f15419
Tags
persistence
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

1ce8d5f8f497a2994b67de5e983c71bbe622e86f0935cb3b5fbf738082f15419

Threat Level: Likely malicious

The file e393866f73ea17a9112ff6a58bd603c1_JaffaCakes118 was found to be: Likely malicious.

Malicious Activity Summary

persistence

Modifies AppInit DLL entries

Checks computer location settings

Enumerates physical storage devices

Unsigned PE

Modifies registry class

Runs .reg file with regedit

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-06 23:47

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-06 23:47

Reported

2024-04-06 23:49

Platform

win7-20240221-en

Max time kernel

117s

Max time network

118s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e393866f73ea17a9112ff6a58bd603c1_JaffaCakes118.dll,#1

Signatures

Modifies AppInit DLL entries

persistence

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\regfile\shell\open\command\ = "regedit.exe /s \"%1\"" C:\Windows\SysWOW64\rundll32.exe N/A

Runs .reg file with regedit

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\regedit.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 WriteProcessMemory

Description Indicator Process Target
PID 2336 wrote to memory of 2836 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2336 wrote to memory of 2836 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2336 wrote to memory of 2836 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2336 wrote to memory of 2836 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2336 wrote to memory of 2836 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2336 wrote to memory of 2836 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2336 wrote to memory of 2836 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2836 wrote to memory of 1992 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 2836 wrote to memory of 1992 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 2836 wrote to memory of 1992 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 2836 wrote to memory of 1992 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 1992 wrote to memory of 2860 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\regedit.exe
PID 1992 wrote to memory of 2860 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\regedit.exe
PID 1992 wrote to memory of 2860 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\regedit.exe
PID 1992 wrote to memory of 2860 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\regedit.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e393866f73ea17a9112ff6a58bd603c1_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e393866f73ea17a9112ff6a58bd603c1_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\a.reg

C:\Windows\SysWOW64\regedit.exe

"regedit.exe" /s "C:\Users\Admin\AppData\Local\Temp\a.reg"

Network

N/A

Files

C:\Users\Admin\AppData\Local\Temp\a.reg

MD5 b100f5324ef74ded0b998e64d07a2e19
SHA1 40b0d7f51bf2dd8451f1b723d21355c471a5fa46
SHA256 3db613d24a75ae220891698c055e1c580a42e58564f568a0510db87581cc2042
SHA512 c12391bb37c334074f7d7e1257b6364fd5cbce848e0a8fe15b8326f54fd9568fe3baec58618c4334027a774a06a08ec249cb71db925c1f85feee6a3d3a816c04

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-06 23:47

Reported

2024-04-06 23:49

Platform

win10v2004-20240226-en

Max time kernel

148s

Max time network

155s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e393866f73ea17a9112ff6a58bd603c1_JaffaCakes118.dll,#1

Signatures

Modifies AppInit DLL entries

persistence

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation C:\Windows\SysWOW64\cmd.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\regfile\shell\open\command\ = "regedit.exe /s \"%1\"" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000_Classes\Local Settings C:\Windows\SysWOW64\cmd.exe N/A

Runs .reg file with regedit

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

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e393866f73ea17a9112ff6a58bd603c1_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e393866f73ea17a9112ff6a58bd603c1_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\a.reg

C:\Windows\SysWOW64\regedit.exe

"regedit.exe" /s "C:\Users\Admin\AppData\Local\Temp\a.reg"

Network

Country Destination Domain Proto
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 150.1.37.23.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 5.173.189.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\a.reg

MD5 b100f5324ef74ded0b998e64d07a2e19
SHA1 40b0d7f51bf2dd8451f1b723d21355c471a5fa46
SHA256 3db613d24a75ae220891698c055e1c580a42e58564f568a0510db87581cc2042
SHA512 c12391bb37c334074f7d7e1257b6364fd5cbce848e0a8fe15b8326f54fd9568fe3baec58618c4334027a774a06a08ec249cb71db925c1f85feee6a3d3a816c04