Malware Analysis Report

2025-08-05 11:47

Sample ID 241031-f8s3ya1frp
Target 81cd522bbee329748be2dd219c88cce5_JaffaCakes118
SHA256 19ddc1f60f505a17da34fde25a21e8ea5aa604e0e060be2c13f07cbe155cb464
Tags
upx defense_evasion discovery 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

19ddc1f60f505a17da34fde25a21e8ea5aa604e0e060be2c13f07cbe155cb464

Threat Level: Likely malicious

The file 81cd522bbee329748be2dd219c88cce5_JaffaCakes118 was found to be: Likely malicious.

Malicious Activity Summary

upx defense_evasion discovery persistence

Blocklisted process makes network request

Server Software Component: Terminal Services DLL

Checks computer location settings

Indicator Removal: File Deletion

UPX packed file

System Location Discovery: System Language Discovery

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 05:32

Signatures

UPX packed file

upx
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: behavioral1

Detonation Overview

Submitted

2024-10-31 05:32

Reported

2024-10-31 05:35

Platform

win7-20240903-en

Max time kernel

140s

Max time network

123s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\81cd522bbee329748be2dd219c88cce5_JaffaCakes118.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

Server Software Component: Terminal Services DLL

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\.Net CLR\Parameters\ServiceDll = "C:\\Users\\Admin\\AppData\\Local\\Temp\\81cd522bbee329748be2dd219c88cce5_JaffaCakes118.dll" C:\Windows\SysWOW64\rundll32.exe N/A

Indicator Removal: File Deletion

defense_evasion

UPX packed file

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

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\svchost.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1236 wrote to memory of 1980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1236 wrote to memory of 1980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1236 wrote to memory of 1980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1236 wrote to memory of 1980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1236 wrote to memory of 1980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1236 wrote to memory of 1980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1236 wrote to memory of 1980 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1980 wrote to memory of 2468 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 1980 wrote to memory of 2468 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 1980 wrote to memory of 2468 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 1980 wrote to memory of 2468 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 2104 wrote to memory of 760 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\rundll32.exe
PID 2104 wrote to memory of 760 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\rundll32.exe
PID 2104 wrote to memory of 760 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\rundll32.exe
PID 2104 wrote to memory of 760 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\rundll32.exe
PID 2104 wrote to memory of 760 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\rundll32.exe
PID 2104 wrote to memory of 760 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\rundll32.exe
PID 2104 wrote to memory of 760 N/A C:\Windows\SysWOW64\svchost.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\81cd522bbee329748be2dd219c88cce5_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\81cd522bbee329748be2dd219c88cce5_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\svchost.exe

C:\Windows\SysWOW64\svchost.exe -k ".Net CLR"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del "C:\Windows\SysWOW64\rundll32.exe" > nul

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe c:\users\admin\appdata\local\temp\81cd522bbee329748be2dd219c88cce5_jaffacakes118.dll, Launch

Network

Country Destination Domain Proto
CN 122.64.67.189:80 tcp
CN 122.64.67.189:80 tcp
CN 122.64.67.189:80 tcp
CN 122.64.67.189:80 tcp
CN 122.64.67.189:80 tcp

Files

memory/1980-0-0x0000000075010000-0x000000007512E000-memory.dmp

memory/1980-1-0x0000000075000000-0x000000007511E000-memory.dmp

memory/1980-3-0x0000000075010000-0x000000007512E000-memory.dmp

memory/1980-2-0x0000000074EE0000-0x0000000074FFE000-memory.dmp

memory/2104-4-0x0000000075010000-0x000000007512E000-memory.dmp

memory/760-5-0x0000000075010000-0x000000007512E000-memory.dmp

memory/760-7-0x0000000075010000-0x000000007512E000-memory.dmp

memory/760-6-0x0000000075010000-0x000000007512E000-memory.dmp

memory/1980-8-0x0000000075010000-0x000000007512E000-memory.dmp

memory/2104-9-0x0000000075010000-0x000000007512E000-memory.dmp

memory/760-10-0x0000000075010000-0x000000007512E000-memory.dmp

memory/760-16-0x0000000075010000-0x000000007512E000-memory.dmp

memory/760-20-0x0000000075010000-0x000000007512E000-memory.dmp

memory/2104-23-0x0000000075010000-0x000000007512E000-memory.dmp

memory/760-24-0x0000000075010000-0x000000007512E000-memory.dmp

memory/760-34-0x0000000075010000-0x000000007512E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-31 05:32

Reported

2024-10-31 05:35

Platform

win10v2004-20241007-en

Max time kernel

140s

Max time network

140s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\81cd522bbee329748be2dd219c88cce5_JaffaCakes118.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

Server Software Component: Terminal Services DLL

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\.Net CLR\Parameters\ServiceDll = "C:\\Users\\Admin\\AppData\\Local\\Temp\\81cd522bbee329748be2dd219c88cce5_JaffaCakes118.dll" C:\Windows\SysWOW64\rundll32.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation C:\Windows\SysWOW64\rundll32.exe N/A

Indicator Removal: File Deletion

defense_evasion

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
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Enumerates physical storage devices

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
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\svchost.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.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: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\81cd522bbee329748be2dd219c88cce5_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\81cd522bbee329748be2dd219c88cce5_JaffaCakes118.dll,#1

C:\Windows\SysWOW64\svchost.exe

C:\Windows\SysWOW64\svchost.exe -k ".Net CLR"

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe c:\users\admin\appdata\local\temp\81cd522bbee329748be2dd219c88cce5_jaffacakes118.dll, Launch

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del "C:\Windows\SysWOW64\rundll32.exe" > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
CN 122.64.67.189:80 tcp
US 8.8.8.8:53 73.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
CN 122.64.67.189:80 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 73.190.18.2.in-addr.arpa udp
CN 122.64.67.189:80 tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
CN 122.64.67.189:80 tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
CN 122.64.67.189:80 tcp

Files

memory/3228-0-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/1332-1-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/2708-2-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/1332-4-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/1332-8-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/1332-12-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/1332-16-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/1332-20-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/1332-24-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/2708-25-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/1332-26-0x0000000074CA0000-0x0000000074DBE000-memory.dmp

memory/1332-30-0x0000000074CA0000-0x0000000074DBE000-memory.dmp