Malware Analysis Report

2025-01-18 16:47

Sample ID 220308-xjle8safd8
Target 477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff
SHA256 477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff
Tags
isrstealer collection spyware stealer upx
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

477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff

Threat Level: Known bad

The file 477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff was found to be: Known bad.

Malicious Activity Summary

isrstealer collection spyware stealer upx

ISR Stealer Payload

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 SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-03-08 18:53

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 18:53

Reported

2022-03-08 19:20

Platform

win7-20220223-en

Max time kernel

4294183s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.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-1-5-21-1405931862-909307831-4085185274-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1940 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1328 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1328 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1328 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1328 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1328 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1328 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1328 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1328 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 1940 wrote to memory of 1328 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe

Processes

C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe

"C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe"

C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\Rw58E6FuMf.ini"

C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\C5vrrtRsRY.ini"

Network

Country Destination Domain Proto
US 8.8.8.8:53 sentrinonline.com udp

Files

memory/1996-56-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1996-58-0x0000000076271000-0x0000000076273000-memory.dmp

memory/1996-59-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1996-60-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Rw58E6FuMf.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/1328-63-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1328-66-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1328-67-0x0000000000400000-0x000000000041F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-03-08 18:53

Reported

2022-03-08 19:20

Platform

win10v2004-en-20220112

Max time kernel

111s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.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-1-5-21-790714498-1549421491-1643397139-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3604 wrote to memory of 2336 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 2336 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 2336 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 2336 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 2336 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 2336 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 2336 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 2336 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 3580 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 3580 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 3580 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 3580 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 3580 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 3580 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 3580 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe
PID 3604 wrote to memory of 3580 N/A C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe

Processes

C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe

"C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe"

C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\1wpdV0IWHf.ini"

C:\Users\Admin\AppData\Local\Temp\477e6b09e3e89ad834d36eb692abdf95e2bd814c880918085d7b40abf5b19dff.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\P0ah1RgPzP.ini"

Network

Country Destination Domain Proto
NL 104.80.224.57:443 tcp
US 8.8.8.8:53 sentrinonline.com udp
US 13.107.4.50:80 tcp
US 13.107.4.50:80 tcp
US 8.8.8.8:53 geo.prod.do.dsp.mp.microsoft.com udp
US 52.143.84.45:443 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
NL 104.85.1.163:80 tcp

Files

memory/2336-132-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2336-134-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2336-135-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\1wpdV0IWHf.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/3580-137-0x0000000000400000-0x000000000041F000-memory.dmp

memory/3580-139-0x0000000000400000-0x000000000041F000-memory.dmp

memory/3580-140-0x0000000000400000-0x000000000041F000-memory.dmp