Malware Analysis Report

2025-01-18 16:42

Sample ID 241209-1p2wyssnev
Target dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118
SHA256 bb64e688ed77464721aed2f6ccf8a730d5cdd5ae6bb2884e9d3ee46ae41fcdad
Tags
isrstealer discovery 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

bb64e688ed77464721aed2f6ccf8a730d5cdd5ae6bb2884e9d3ee46ae41fcdad

Threat Level: Known bad

The file dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

isrstealer discovery stealer trojan upx

ISR Stealer

ISR Stealer payload

Isrstealer family

Suspicious use of SetThreadContext

UPX packed file

AutoIT Executable

Unsigned PE

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-09 21:50

Signatures

AutoIT Executable

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

2024-12-09 21:50

Reported

2024-12-09 21:52

Platform

win7-20241010-en

Max time kernel

118s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_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

Isrstealer family

isrstealer

AutoIT Executable

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2360 set thread context of 2464 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2464 set thread context of 2312 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe

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

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:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\calc.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\calc.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2360 wrote to memory of 2464 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2360 wrote to memory of 2464 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2360 wrote to memory of 2464 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2360 wrote to memory of 2464 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2360 wrote to memory of 2464 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2360 wrote to memory of 2464 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2464 wrote to memory of 2312 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 2464 wrote to memory of 2312 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 2464 wrote to memory of 2312 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 2464 wrote to memory of 2312 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 2464 wrote to memory of 2312 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 2464 wrote to memory of 2312 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 2464 wrote to memory of 2312 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 2464 wrote to memory of 2312 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 2464 wrote to memory of 2312 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe

Processes

C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe"

C:\Windows\SysWOW64\calc.exe

"C:\Windows\SysWOW64\calc.exe"

C:\Windows\SysWOW64\calc.exe

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

Network

N/A

Files

memory/2360-0-0x0000000000400000-0x0000000000509000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\osdin.txt

MD5 341c286009802e630bb2c2fadc192d4b
SHA1 982341dec725fffe13d7fc81d5b2f9112622af4c
SHA256 b5c600cf2a879be00fb957fdd54b0b08ffb5f46d1b9e2d65be66690d389ed9e4
SHA512 870625d59e068720b5175ff458958578de080c7fee46b789e84b2a25309fd688015a85917c0ebff99138eaab06f829965ca320691d93e2f6c15f4856d1d1d32a

memory/2464-9-0x0000000000400000-0x0000000000432000-memory.dmp

memory/2464-11-0x0000000000400000-0x0000000000432000-memory.dmp

memory/2464-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2312-16-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2312-18-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2312-19-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2312-21-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2464-23-0x0000000000400000-0x0000000000432000-memory.dmp

memory/2312-24-0x0000000000400000-0x0000000000453000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-09 21:50

Reported

2024-12-09 21:53

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_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

AutoIT Executable

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2876 set thread context of 4752 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 4752 set thread context of 3552 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe

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

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:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\calc.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\calc.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2876 wrote to memory of 4752 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2876 wrote to memory of 4752 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2876 wrote to memory of 4752 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2876 wrote to memory of 4752 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 2876 wrote to memory of 4752 N/A C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe C:\Windows\SysWOW64\calc.exe
PID 4752 wrote to memory of 3552 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 4752 wrote to memory of 3552 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 4752 wrote to memory of 3552 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 4752 wrote to memory of 3552 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 4752 wrote to memory of 3552 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 4752 wrote to memory of 3552 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 4752 wrote to memory of 3552 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe
PID 4752 wrote to memory of 3552 N/A C:\Windows\SysWOW64\calc.exe C:\Windows\SysWOW64\calc.exe

Processes

C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\dbb411b31c2f2beb3cf20e5f428c6100_JaffaCakes118.exe"

C:\Windows\SysWOW64\calc.exe

"C:\Windows\SysWOW64\calc.exe"

C:\Windows\SysWOW64\calc.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 101.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 82.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 134.130.81.91.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp

Files

memory/2876-0-0x0000000000400000-0x0000000000509000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\autAF3B.tmp

MD5 341c286009802e630bb2c2fadc192d4b
SHA1 982341dec725fffe13d7fc81d5b2f9112622af4c
SHA256 b5c600cf2a879be00fb957fdd54b0b08ffb5f46d1b9e2d65be66690d389ed9e4
SHA512 870625d59e068720b5175ff458958578de080c7fee46b789e84b2a25309fd688015a85917c0ebff99138eaab06f829965ca320691d93e2f6c15f4856d1d1d32a

memory/4752-9-0x0000000000400000-0x0000000000432000-memory.dmp

memory/4752-11-0x0000000000400000-0x0000000000432000-memory.dmp

memory/3552-14-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3552-17-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3552-18-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3552-19-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3552-21-0x0000000000400000-0x0000000000453000-memory.dmp

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

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/4752-23-0x0000000000400000-0x0000000000432000-memory.dmp