Malware Analysis Report

2025-08-05 15:35

Sample ID 241031-yet29asgmg
Target 83a2c9543bde47a5d607730120b87bf0_JaffaCakes118
SHA256 7a6423f9aa6421bf9e8ce1bbe303254d4961d233c86c9d43f75dd906134d50da
Tags
discovery evasion persistence trojan
score
10/10

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
10/10

SHA256

7a6423f9aa6421bf9e8ce1bbe303254d4961d233c86c9d43f75dd906134d50da

Threat Level: Known bad

The file 83a2c9543bde47a5d607730120b87bf0_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

discovery evasion persistence trojan

Modifies visiblity of hidden/system files in Explorer

UAC bypass

Disables taskbar notifications via registry modification

Adds policy Run key to start application

Deletes itself

Blocklisted process makes network request

Program crash

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 19:43

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-31 19:42

Reported

2024-10-31 20:00

Platform

win10v2004-20241007-en

Max time kernel

139s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe"

Signatures

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4968 -ip 4968

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4968 -s 496

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 103.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 90.160.77.104.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

Files

memory/4968-0-0x00000000021E0000-0x00000000021E1000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-31 19:42

Reported

2024-10-31 20:03

Platform

win7-20241010-en

Max time kernel

20s

Max time network

24s

Command Line

"C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe"

Signatures

Modifies visiblity of hidden/system files in Explorer

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" C:\Windows\SysWOW64\msiexec.exe N/A

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Windows\SysWOW64\msiexec.exe N/A

Adds policy Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\MACHINE\software\microsoft\windows\currentversion\Policies\Explorer\Run C:\Windows\SysWOW64\msiexec.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\226765405 = "C:\\ProgramData\\msjvmcmng.exe" C:\Windows\SysWOW64\msiexec.exe N/A

Disables taskbar notifications via registry modification

evasion

Deletes itself

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

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\msiexec.exe N/A
N/A N/A C:\Windows\SysWOW64\msiexec.exe N/A
N/A N/A C:\Windows\SysWOW64\msiexec.exe N/A
N/A N/A C:\Windows\SysWOW64\msiexec.exe N/A
N/A N/A C:\Windows\SysWOW64\msiexec.exe N/A
N/A N/A C:\Windows\SysWOW64\msiexec.exe N/A
N/A N/A C:\Windows\SysWOW64\msiexec.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\msiexec.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\msiexec.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe N/A
N/A N/A C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2476 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2584 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe
PID 2476 wrote to memory of 2968 N/A C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe C:\Windows\SysWOW64\msiexec.exe

Processes

C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\83a2c9543bde47a5d607730120b87bf0_JaffaCakes118.exe"

C:\Windows\SysWOW64\msiexec.exe

"C:\Windows\system32\msiexec.exe"

C:\Windows\SysWOW64\msiexec.exe

"C:\Windows\system32\msiexec.exe"

Network

Country Destination Domain Proto
US 8.8.4.4:53 update.microsoft.com udp
US 8.8.8.8:53 update.microsoft.com udp
US 20.109.209.108:80 update.microsoft.com tcp
RU 109.120.180.29:80 tcp
US 8.8.4.4:53 faumoussuperstars.ru udp
US 8.8.8.8:53 faumoussuperstars.ru udp
US 8.8.4.4:53 powerrembo.ru udp
US 8.8.8.8:53 powerrembo.ru udp
US 8.8.4.4:53 powerrembo.ru udp
US 104.42.225.122:80 powerrembo.ru tcp

Files

memory/2476-0-0x0000000000270000-0x0000000000271000-memory.dmp

memory/2476-1-0x0000000000400000-0x0000000000405000-memory.dmp

memory/2476-2-0x0000000000400000-0x0000000000459000-memory.dmp

memory/2584-3-0x0000000000F00000-0x0000000000F14000-memory.dmp

memory/2584-4-0x0000000000F00000-0x0000000000F14000-memory.dmp

memory/2584-6-0x0000000000F00000-0x0000000000F14000-memory.dmp

memory/2968-11-0x000000007EF90000-0x000000007EF96000-memory.dmp

memory/2968-15-0x000000007EF90000-0x000000007EF96000-memory.dmp

memory/2968-16-0x000000007EF90000-0x000000007EF96000-memory.dmp

memory/2968-17-0x0000000000090000-0x0000000000095000-memory.dmp