Malware Analysis Report

2025-01-18 16:49

Sample ID 221011-e34f2segck
Target c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602
SHA256 c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602
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

c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602

Threat Level: Known bad

The file c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602 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

2022-10-11 04:28

Signatures

ISR Stealer payload

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

Isrstealer family

isrstealer

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-11 04:28

Reported

2022-10-11 05:33

Platform

win7-20220812-en

Max time kernel

30s

Max time network

46s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe"

Signatures

NirSoft MailPassView

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

Nirsoft

Description Indicator Process Target
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
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-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1628 wrote to memory of 1152 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1152 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1152 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1152 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1152 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1152 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1152 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1152 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1152 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 1628 wrote to memory of 1708 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe

Processes

C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe

"C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe"

C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\M0QXfsjBQn.ini"

C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\st04tsFBRs.ini"

Network

Country Destination Domain Proto
US 8.8.8.8:53 autoitest.altervista.org udp

Files

memory/1152-56-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1152-57-0x00000000004512E0-mapping.dmp

memory/1152-59-0x0000000076201000-0x0000000076203000-memory.dmp

memory/1152-60-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1152-61-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1152-62-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1152-63-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\M0QXfsjBQn.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/1708-66-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1708-67-0x000000000041C410-mapping.dmp

memory/1708-70-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1708-71-0x0000000000400000-0x000000000041F000-memory.dmp

memory/1708-72-0x0000000000400000-0x000000000041F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-11 04:28

Reported

2022-10-11 05:33

Platform

win10v2004-20220812-en

Max time kernel

148s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe"

Signatures

NirSoft MailPassView

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

Nirsoft

Description Indicator Process Target
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
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-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3080 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 956 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe
PID 3080 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe

Processes

C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe

"C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe"

C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\o6itytjt96.ini"

C:\Users\Admin\AppData\Local\Temp\c1b6543df251b6157e8be2772d637cc9517927545bce9648119f7d4371b8a602.exe

/scomma "C:\Users\Admin\AppData\Local\Temp\iginH2nKYp.ini"

Network

Country Destination Domain Proto
US 93.184.221.240:80 tcp
US 8.8.8.8:53 autoitest.altervista.org udp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 52.242.97.97:443 tcp
US 52.168.117.170:443 tcp
US 8.8.8.8:53 15.89.54.20.in-addr.arpa udp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 8.8.8.8:53 176.122.125.40.in-addr.arpa udp

Files

memory/956-134-0x0000000000000000-mapping.dmp

memory/956-135-0x0000000000400000-0x0000000000453000-memory.dmp

memory/956-137-0x0000000000400000-0x0000000000453000-memory.dmp

memory/956-138-0x0000000000400000-0x0000000000453000-memory.dmp

memory/956-139-0x0000000000400000-0x0000000000453000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\o6itytjt96.ini

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

memory/4596-141-0x0000000000000000-mapping.dmp

memory/4596-142-0x0000000000400000-0x000000000041F000-memory.dmp

memory/4596-144-0x0000000000400000-0x000000000041F000-memory.dmp

memory/4596-145-0x0000000000400000-0x000000000041F000-memory.dmp

memory/4596-146-0x0000000000400000-0x000000000041F000-memory.dmp