Malware Analysis Report

2025-01-18 16:45

Sample ID 220612-f9p3nscef7
Target 225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f
SHA256 225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f
Tags
isrstealer spyware stealer trojan upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f

Threat Level: Known bad

The file 225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f was found to be: Known bad.

Malicious Activity Summary

isrstealer spyware stealer trojan upx

ISR Stealer

ISR Stealer Payload

UPX packed file

Reads user/profile data of web browsers

Maps connected drives based on registry

Suspicious use of SetThreadContext

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-06-12 05:34

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2022-06-12 05:34

Reported

2022-06-12 10:03

Platform

win10v2004-20220414-en

Max time kernel

172s

Max time network

179s

Command Line

"C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.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
N/A N/A N/A 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
N/A N/A N/A N/A

Reads user/profile data of web browsers

spyware stealer

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1968 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1968 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1968 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1968 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1968 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1968 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1968 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1968 wrote to memory of 3144 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 3144 wrote to memory of 3192 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 3144 wrote to memory of 3192 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 3144 wrote to memory of 3192 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 3144 wrote to memory of 3192 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 3144 wrote to memory of 3192 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 3144 wrote to memory of 3192 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 3144 wrote to memory of 3192 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 3144 wrote to memory of 3192 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe

Processes

C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe

"C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe"

C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe

"C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe"

C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe

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

Network

Country Destination Domain Proto
US 20.42.72.131:443 tcp
US 8.8.8.8:53 106.89.54.20.in-addr.arpa udp
US 93.184.221.240:80 tcp
US 204.79.197.203:80 tcp
US 8.8.8.8:53 a.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.0.5.0.8.0.0.3.0.1.3.0.6.2.ip6.arpa udp
NL 104.110.191.140:80 tcp

Files

memory/3144-132-0x0000000000000000-mapping.dmp

memory/3144-133-0x0000000000400000-0x0000000000432000-memory.dmp

memory/3192-137-0x0000000000000000-mapping.dmp

memory/3192-138-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3192-140-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3192-141-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3192-142-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3144-143-0x0000000000400000-0x0000000000432000-memory.dmp

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

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/3144-145-0x0000000000400000-0x0000000000432000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2022-06-12 05:34

Reported

2022-06-12 10:03

Platform

win7-20220414-en

Max time kernel

40s

Max time network

45s

Command Line

"C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.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
N/A N/A N/A 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
N/A N/A N/A N/A
N/A N/A N/A N/A

Reads user/profile data of web browsers

spyware stealer

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1008 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1008 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1008 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1008 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1008 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1008 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1008 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1008 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1104 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1104 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1104 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1104 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1104 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1104 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1104 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1104 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe
PID 1104 wrote to memory of 2004 N/A C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe

Processes

C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe

"C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe"

C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe

"C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe"

C:\Users\Admin\AppData\Local\Temp\225829356ad00c2f1c3e5d8dd4edb61ae446d3b2ec4ed3a9f282715a36a72b7f.exe

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

Network

N/A

Files

memory/1104-56-0x0000000000400000-0x0000000000432000-memory.dmp

memory/1104-57-0x0000000000400000-0x0000000000432000-memory.dmp

memory/1104-59-0x0000000000400000-0x0000000000432000-memory.dmp

memory/1104-61-0x0000000000400000-0x0000000000432000-memory.dmp

memory/1104-62-0x0000000000401130-mapping.dmp

memory/2004-66-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2004-67-0x00000000004512E0-mapping.dmp

memory/2004-69-0x0000000075FC1000-0x0000000075FC3000-memory.dmp

memory/2004-70-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2004-71-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1104-72-0x0000000000400000-0x0000000000432000-memory.dmp

memory/2004-73-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2004-74-0x0000000000400000-0x0000000000453000-memory.dmp