Malware Analysis Report

2025-01-18 16:46

Sample ID 220308-tkwqtaggg5
Target 6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d
SHA256 6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d
Tags
isrstealer collection spyware stealer upx 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

6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d

Threat Level: Known bad

The file 6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d was found to be: Known bad.

Malicious Activity Summary

isrstealer collection spyware stealer upx trojan

ISR Stealer

ISR Stealer Payload

Isrstealer family

Nirsoft

NirSoft MailPassView

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 16:07

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 16:07

Reported

2022-03-08 16:12

Platform

win7-en-20211208

Max time kernel

121s

Max time network

130s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.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\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1304 wrote to memory of 1284 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 1284 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 1284 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 1284 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 1284 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 1284 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 1284 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 1284 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 1284 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 572 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 572 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 572 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 572 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 572 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 572 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 572 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 572 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1304 wrote to memory of 572 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe

Processes

C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe

"C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe"

C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\Ip5CpzVSkU.ini"

C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\rGwFWaL4BU.ini"

Network

N/A

Files

memory/1284-57-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1284-59-0x0000000075F91000-0x0000000075F93000-memory.dmp

memory/1284-60-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1284-61-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Ip5CpzVSkU.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/572-63-0x0000000000400000-0x000000000041F000-memory.dmp

memory/572-66-0x0000000000400000-0x000000000041F000-memory.dmp

memory/572-67-0x0000000000400000-0x000000000041F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-03-08 16:07

Reported

2022-03-08 16:13

Platform

win10v2004-en-20220113

Max time kernel

148s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe"

Signatures

ISR Stealer

trojan stealer isrstealer

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-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1676 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 4684 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 4684 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 4684 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 4684 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 4684 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 4684 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 4684 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe
PID 1676 wrote to memory of 4684 N/A C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe

Processes

C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe

"C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe"

C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\g7slJzAP30.ini"

C:\Users\Admin\AppData\Local\Temp\6cf2f10845db610a326a0b053755f1f3464d9d9c0714b0e40ea1211409965b9d.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\FW0axvQaI1.ini"

Network

Country Destination Domain Proto
US 8.8.8.8:53 emt-erimtan.com udp
DE 94.130.251.246:80 emt-erimtan.com tcp
DE 67.24.27.254:80 tcp
DE 67.24.27.254:80 tcp
US 8.8.8.8:53 oneocsp.microsoft.com udp
US 13.107.40.203:80 oneocsp.microsoft.com tcp
US 8.8.8.8:53 www.microsoft.com udp
NL 2.21.41.70:80 www.microsoft.com tcp

Files

memory/1996-132-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1996-134-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1996-135-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\g7slJzAP30.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/4684-137-0x0000000000400000-0x000000000041F000-memory.dmp

memory/4684-139-0x0000000000400000-0x000000000041F000-memory.dmp

memory/4684-140-0x0000000000400000-0x000000000041F000-memory.dmp