Malware Analysis Report

2025-01-18 16:46

Sample ID 220308-xygqladgbn
Target 41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73
SHA256 41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73
Tags
collection spyware stealer upx isrstealer suricata trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73

Threat Level: Known bad

The file 41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73 was found to be: Known bad.

Malicious Activity Summary

collection spyware stealer upx isrstealer suricata trojan

suricata: ET MALWARE ISRStealer Checkin

ISR Stealer Payload

ISR Stealer

Isrstealer family

NirSoft MailPassView

Nirsoft

UPX packed file

Reads user/profile data of web browsers

Accesses Microsoft Outlook accounts

Suspicious use of SetThreadContext

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-03-08 19:15

Signatures

ISR Stealer Payload

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

Isrstealer family

isrstealer

Analysis: behavioral1

Detonation Overview

Submitted

2022-03-08 19:15

Reported

2022-03-08 19:29

Platform

win7-en-20211208

Max time kernel

117s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe"

Signatures

NirSoft MailPassView

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

Nirsoft

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

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook accounts

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1664 wrote to memory of 832 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 832 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 832 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 832 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 832 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 832 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 832 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 832 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 832 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 892 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 892 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 892 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 892 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 892 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 892 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 892 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 892 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 1664 wrote to memory of 892 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe

Processes

C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe

"C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe"

C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\LF3VIQiGv1.ini"

C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe

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

Network

N/A

Files

memory/832-57-0x0000000000400000-0x0000000000453000-memory.dmp

memory/832-59-0x00000000763F1000-0x00000000763F3000-memory.dmp

memory/832-60-0x0000000000400000-0x0000000000453000-memory.dmp

memory/832-61-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\LF3VIQiGv1.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/892-63-0x0000000000400000-0x000000000041F000-memory.dmp

memory/892-66-0x0000000000400000-0x000000000041F000-memory.dmp

memory/892-67-0x0000000000400000-0x000000000041F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-03-08 19:15

Reported

2022-03-08 19:29

Platform

win10v2004-en-20220112

Max time kernel

111s

Max time network

158s

Command Line

"C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe"

Signatures

ISR Stealer

trojan stealer isrstealer

suricata: ET MALWARE ISRStealer Checkin

suricata

NirSoft MailPassView

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

Nirsoft

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

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook accounts

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3484 wrote to memory of 3324 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3324 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3324 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3324 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3324 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3324 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3324 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3324 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe
PID 3484 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe

Processes

C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe

"C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe"

C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\KaEWdA78FJ.ini"

C:\Users\Admin\AppData\Local\Temp\41faef920f93d0b081b5d93b78e3b8a91117f042b259f5529fce923ca2051f73.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\akXMQ1bizg.ini"

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
NL 104.80.224.57:443 tcp
US 8.8.8.8:53 www.guruhkz.allalla.com udp
US 52.128.23.153:80 www.guruhkz.allalla.com tcp
US 8.8.8.8:53 geo.prod.do.dsp.mp.microsoft.com udp
US 52.137.110.235:443 geo.prod.do.dsp.mp.microsoft.com tcp
US 8.8.8.8:53 kv801.prod.do.dsp.mp.microsoft.com udp
NL 184.29.205.60:443 kv801.prod.do.dsp.mp.microsoft.com tcp
US 8.8.8.8:53 cp801.prod.do.dsp.mp.microsoft.com udp
NL 184.29.205.60:443 cp801.prod.do.dsp.mp.microsoft.com tcp
NL 184.29.205.60:443 cp801.prod.do.dsp.mp.microsoft.com tcp
US 8.8.8.8:53 oneocsp.microsoft.com udp
US 131.253.33.203:80 oneocsp.microsoft.com tcp
US 8.8.8.8:53 www.microsoft.com udp
NL 104.85.1.163:80 www.microsoft.com tcp
NL 104.85.1.163:80 www.microsoft.com tcp

Files

memory/3324-132-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3324-134-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3324-135-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\KaEWdA78FJ.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/3696-137-0x0000000000400000-0x000000000041F000-memory.dmp

memory/3696-139-0x0000000000400000-0x000000000041F000-memory.dmp

memory/3696-140-0x0000000000400000-0x000000000041F000-memory.dmp