Malware Analysis Report

2024-10-19 10:27

Sample ID 240315-xxk2magf71
Target cc34c96b6bc094e0f377417b137ef773
SHA256 64025cc74704c387b600d7ebdb3a92aaf19a6b5eb572d8918771b86adad61c2c
Tags
isrstealer spyware stealer upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

64025cc74704c387b600d7ebdb3a92aaf19a6b5eb572d8918771b86adad61c2c

Threat Level: Known bad

The file cc34c96b6bc094e0f377417b137ef773 was found to be: Known bad.

Malicious Activity Summary

isrstealer spyware stealer upx

ISR Stealer payload

Isrstealer family

UPX packed file

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-15 19:13

Signatures

ISR Stealer payload

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

Isrstealer family

isrstealer

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-15 19:13

Reported

2024-03-15 19:16

Platform

win7-20240220-en

Max time kernel

122s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe"

Signatures

Reads user/profile data of web browsers

spyware stealer

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2092 set thread context of 2580 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2092 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 2092 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 2092 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 2092 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 2092 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 2092 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 2092 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 2092 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 2092 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe

Processes

C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe

"C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe"

C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe

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

Network

N/A

Files

memory/2580-2-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2580-4-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2580-5-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2580-6-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2580-7-0x0000000000400000-0x0000000000453000-memory.dmp

memory/2580-9-0x0000000000400000-0x0000000000453000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-15 19:13

Reported

2024-03-15 19:16

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe"

Signatures

Reads user/profile data of web browsers

spyware stealer

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4732 set thread context of 5112 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4732 wrote to memory of 5112 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 4732 wrote to memory of 5112 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 4732 wrote to memory of 5112 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 4732 wrote to memory of 5112 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 4732 wrote to memory of 5112 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 4732 wrote to memory of 5112 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 4732 wrote to memory of 5112 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe
PID 4732 wrote to memory of 5112 N/A C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe

Processes

C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe

"C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe"

C:\Users\Admin\AppData\Local\Temp\cc34c96b6bc094e0f377417b137ef773.exe

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 40.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 58.99.105.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 195.177.78.104.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 37.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 67.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 29.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 32.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 90.135.221.88.in-addr.arpa udp

Files

memory/5112-2-0x0000000000400000-0x0000000000453000-memory.dmp

memory/5112-4-0x0000000000400000-0x0000000000453000-memory.dmp

memory/5112-5-0x0000000000400000-0x0000000000453000-memory.dmp

memory/5112-6-0x0000000000400000-0x0000000000453000-memory.dmp

memory/5112-8-0x0000000000400000-0x0000000000453000-memory.dmp

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

MD5 d1ea279fb5559c020a1b4137dc4de237
SHA1 db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3