Malware Analysis Report

2025-03-14 22:31

Sample ID 240407-xrw7pscb72
Target e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118
SHA256 05f2ba0c8763a576b91c997add1b014f0ddfb654574585c9e630e8effbe44b36
Tags
upx 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

05f2ba0c8763a576b91c997add1b014f0ddfb654574585c9e630e8effbe44b36

Threat Level: Likely malicious

The file e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118 was found to be: Likely malicious.

Malicious Activity Summary

upx persistence

Drops file in Drivers directory

Executes dropped EXE

UPX packed file

Adds Run key to start application

Drops file in Windows directory

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-07 19:05

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
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-07 19:05

Reported

2024-04-07 19:08

Platform

win7-20240319-en

Max time kernel

118s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe"

Signatures

Drops file in Drivers directory

Description Indicator Process Target
File created C:\Windows\system32\drivers\etc\hosts C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe N/A
File opened for modification C:\Windows\system32\drivers\etc\hosts C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe N/A

Executes dropped EXE

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

UPX packed file

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2610426812-2871295383-373749122-1000\Software\Microsoft\Windows\CurrentVersion\Run\$$config = "C:\\Windows\\svhost.exe" C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\svhost.dll C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe N/A
File created C:\Windows\svhost.exe C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe N/A
File opened for modification C:\Windows\svhost.exe C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe"

C:\Windows\svhost.exe

C:\Windows\svhost.exe

Network

N/A

Files

memory/1372-0-0x0000000000400000-0x000000000041D000-memory.dmp

memory/1372-1-0x0000000000400000-0x000000000041D000-memory.dmp

memory/1372-2-0x0000000000230000-0x0000000000232000-memory.dmp

memory/1372-5-0x0000000000230000-0x0000000000232000-memory.dmp

C:\Windows\svhost.exe

MD5 e5a4cb7951f2b2411d7403a3240a454c
SHA1 b0fa7bfc12295ee04dce4ccf9ed98dc50ab3234e
SHA256 05f2ba0c8763a576b91c997add1b014f0ddfb654574585c9e630e8effbe44b36
SHA512 a7c3de523c5cc1e553e440d75e7b23171ee14eb1dd9bcbda44b2239bed53669a5ca9019a350fa3c951c9dce00f77b1b947164672a770cfdc8d09ec5ad838d619

memory/1372-14-0x0000000000270000-0x000000000028D000-memory.dmp

memory/1316-15-0x0000000000400000-0x000000000041D000-memory.dmp

memory/1372-18-0x0000000000400000-0x000000000041D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-07 19:05

Reported

2024-04-07 19:08

Platform

win10v2004-20240319-en

Max time kernel

148s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe"

Signatures

UPX packed file

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

Processes

C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\e5a4cb7951f2b2411d7403a3240a454c_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2464 -ip 2464

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2464 -s 428

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1404 --field-trial-handle=2288,i,11069632825633797559,14829202121434726371,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 20.231.121.79:80 tcp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
GB 13.105.221.16:443 tcp
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 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 26.173.189.20.in-addr.arpa udp

Files

memory/2464-0-0x0000000000400000-0x000000000041D000-memory.dmp

memory/2464-1-0x00000000006D0000-0x00000000006D2000-memory.dmp

memory/2464-2-0x0000000000400000-0x000000000041D000-memory.dmp