Malware Analysis Report

2025-01-18 16:42

Sample ID 241126-s65eeaxnaz
Target a2c6eb6be849b063bc45e9114f543888_JaffaCakes118
SHA256 3b72f46088f0554ee89a08507ff0695acad9c555d0f3a3858d969723cd592ac4
Tags
isrstealer discovery spyware stealer trojan upx
score
10/10

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
10/10

SHA256

3b72f46088f0554ee89a08507ff0695acad9c555d0f3a3858d969723cd592ac4

Threat Level: Known bad

The file a2c6eb6be849b063bc45e9114f543888_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

isrstealer discovery spyware stealer trojan upx

ISR Stealer

Isrstealer family

ISR Stealer payload

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

UPX packed file

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-26 15:45

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-26 15:45

Reported

2024-11-26 15:47

Platform

win7-20241010-en

Max time kernel

140s

Max time network

19s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe"

Signatures

ISR Stealer

trojan stealer isrstealer

ISR Stealer payload

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

Isrstealer family

isrstealer

Reads user/profile data of web browsers

spyware stealer

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

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\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3064 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 3064 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 3064 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 3064 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 3064 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 3064 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 3064 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 3064 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 3064 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2904 wrote to memory of 2824 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2904 wrote to memory of 2824 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2904 wrote to memory of 2824 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2904 wrote to memory of 2824 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2904 wrote to memory of 2824 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2904 wrote to memory of 2824 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2904 wrote to memory of 2824 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2904 wrote to memory of 2824 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2904 wrote to memory of 2824 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe

C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe

C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"

Network

N/A

Files

memory/3064-0-0x0000000000400000-0x0000000000426000-memory.dmp

memory/2904-3-0x0000000000400000-0x0000000000432000-memory.dmp

memory/3064-7-0x0000000000400000-0x0000000000426000-memory.dmp

memory/2904-10-0x0000000000240000-0x0000000000266000-memory.dmp

memory/2824-15-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2824-14-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2824-13-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2824-11-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2824-19-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2904-20-0x0000000000400000-0x0000000000432000-memory.dmp

memory/2904-21-0x0000000000240000-0x0000000000266000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-26 15:45

Reported

2024-11-26 15:47

Platform

win10v2004-20241007-en

Max time kernel

96s

Max time network

136s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe"

Signatures

ISR Stealer

trojan stealer isrstealer

ISR Stealer payload

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

Isrstealer family

isrstealer

Reads user/profile data of web browsers

spyware stealer

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

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\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2808 wrote to memory of 1692 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2808 wrote to memory of 1692 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2808 wrote to memory of 1692 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2808 wrote to memory of 1692 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2808 wrote to memory of 1692 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2808 wrote to memory of 1692 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2808 wrote to memory of 1692 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 2808 wrote to memory of 1692 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 1692 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 1692 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 1692 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 1692 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 1692 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 1692 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 1692 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe
PID 1692 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe

C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe

C:\Users\Admin\AppData\Local\Temp\a2c6eb6be849b063bc45e9114f543888_JaffaCakes118.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\tmp.ini"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/2808-0-0x0000000000400000-0x0000000000426000-memory.dmp

memory/1692-3-0x0000000000400000-0x0000000000432000-memory.dmp

memory/1692-5-0x0000000000400000-0x0000000000432000-memory.dmp

memory/2808-6-0x0000000000400000-0x0000000000426000-memory.dmp

memory/4672-9-0x0000000000400000-0x0000000000453000-memory.dmp

memory/4672-11-0x0000000000400000-0x0000000000453000-memory.dmp

memory/4672-13-0x0000000000400000-0x0000000000453000-memory.dmp

memory/4672-12-0x0000000000400000-0x0000000000453000-memory.dmp

memory/4672-15-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/1692-18-0x0000000000400000-0x0000000000432000-memory.dmp