Malware Analysis Report

2025-01-18 16:46

Sample ID 220308-rq4x9sfgc3
Target 84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40
SHA256 84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40
Tags
isrstealer 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

84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40

Threat Level: Known bad

The file 84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40 was found to be: Known bad.

Malicious Activity Summary

isrstealer spyware stealer upx

Isrstealer family

ISR Stealer Payload

UPX packed file

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-03-08 14:24

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 14:24

Reported

2022-03-08 14:27

Platform

win7-20220223-en

Max time kernel

4294177s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe"

Signatures

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

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1680 wrote to memory of 768 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 1680 wrote to memory of 768 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 1680 wrote to memory of 768 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 1680 wrote to memory of 768 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 1680 wrote to memory of 768 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 1680 wrote to memory of 768 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 1680 wrote to memory of 768 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 1680 wrote to memory of 768 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 1680 wrote to memory of 768 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe

Processes

C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe

"C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe"

C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe

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

Network

N/A

Files

memory/768-56-0x0000000000400000-0x0000000000453000-memory.dmp

memory/768-58-0x0000000075D71000-0x0000000075D73000-memory.dmp

memory/768-59-0x0000000000400000-0x0000000000453000-memory.dmp

memory/768-60-0x0000000000400000-0x0000000000453000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-03-08 14:24

Reported

2022-03-08 14:27

Platform

win10v2004-en-20220112

Max time kernel

61s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe"

Signatures

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

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3312 wrote to memory of 3884 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 3312 wrote to memory of 3884 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 3312 wrote to memory of 3884 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 3312 wrote to memory of 3884 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 3312 wrote to memory of 3884 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 3312 wrote to memory of 3884 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 3312 wrote to memory of 3884 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe
PID 3312 wrote to memory of 3884 N/A C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe

Processes

C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe

"C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe"

C:\Users\Admin\AppData\Local\Temp\84adb2ffc46865d153e2704ad2413ce2980c28d2eb018461975d94c39180ae40.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 geo.prod.do.dsp.mp.microsoft.com udp
US 52.143.86.214:443 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
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

Files

memory/3884-132-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3884-134-0x0000000000400000-0x0000000000453000-memory.dmp

memory/3884-135-0x0000000000400000-0x0000000000453000-memory.dmp

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

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3