Malware Analysis Report

2024-11-30 04:11

Sample ID 240408-bmz7xacd96
Target 586f7fecacd49adab650fae36e2db994.bin
SHA256 9993b7040d4e10c0279053f8f681628634b87ab5ac2cfc33695b29ce549d76bc
Tags
stealc stealer discovery spyware
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

9993b7040d4e10c0279053f8f681628634b87ab5ac2cfc33695b29ce549d76bc

Threat Level: Known bad

The file 586f7fecacd49adab650fae36e2db994.bin was found to be: Known bad.

Malicious Activity Summary

stealc stealer discovery spyware

Stealc

Downloads MZ/PE file

Loads dropped DLL

Reads data files stored by FTP clients

Reads user/profile data of web browsers

Accesses cryptocurrency files/wallets, possible credential harvesting

Checks installed software on the system

Suspicious use of SetThreadContext

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Checks processor information in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-08 01:16

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-08 01:16

Reported

2024-04-08 01:19

Platform

win7-20240221-en

Max time kernel

119s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe"

Signatures

Stealc

stealer stealc

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2304 set thread context of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2304 wrote to memory of 2688 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2688 wrote to memory of 2728 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\WerFault.exe
PID 2688 wrote to memory of 2728 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\WerFault.exe
PID 2688 wrote to memory of 2728 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\WerFault.exe
PID 2688 wrote to memory of 2728 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe

"C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2688 -s 256

Network

N/A

Files

memory/2304-0-0x0000000074390000-0x0000000074A7E000-memory.dmp

memory/2304-1-0x0000000000CE0000-0x0000000000D0E000-memory.dmp

memory/2304-4-0x0000000002230000-0x0000000004230000-memory.dmp

memory/2688-5-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2688-8-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2688-11-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2688-10-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2688-7-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2688-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2688-13-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2304-17-0x0000000074390000-0x0000000074A7E000-memory.dmp

memory/2688-16-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2688-19-0x0000000000400000-0x000000000063B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-08 01:16

Reported

2024-04-08 01:18

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe"

Signatures

Stealc

stealer stealc

Downloads MZ/PE file

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Reads data files stored by FTP clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Accesses cryptocurrency files/wallets, possible credential harvesting

spyware

Checks installed software on the system

discovery

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4604 set thread context of 2344 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4604 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 4604 wrote to memory of 2344 N/A C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Processes

C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe

"C:\Users\Admin\AppData\Local\Temp\cf88d499c83da613ad5ccd8805822901bdc3a12eb9b15804aeff8c53dc05fc4e.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

Network

Country Destination Domain Proto
FR 52.143.157.84:80 52.143.157.84 tcp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 84.157.143.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 159.113.53.23.in-addr.arpa udp
US 8.8.8.8:53 178.223.142.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 14.173.189.20.in-addr.arpa udp

Files

memory/4604-0-0x00000000005C0000-0x00000000005EE000-memory.dmp

memory/4604-1-0x0000000074FC0000-0x0000000075770000-memory.dmp

memory/2344-4-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2344-7-0x0000000000400000-0x000000000063B000-memory.dmp

memory/4604-9-0x0000000074FC0000-0x0000000075770000-memory.dmp

memory/4604-10-0x0000000002AC0000-0x0000000004AC0000-memory.dmp

memory/2344-11-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2344-12-0x0000000061E00000-0x0000000061EF3000-memory.dmp

C:\ProgramData\nss3.dll

MD5 1cc453cdf74f31e4d913ff9c10acdde2
SHA1 6e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512 dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

C:\ProgramData\mozglue.dll

MD5 c8fd9be83bc728cc04beffafc2907fe9
SHA1 95ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512 fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

memory/2344-80-0x0000000000400000-0x000000000063B000-memory.dmp

memory/4604-81-0x0000000002AC0000-0x0000000004AC0000-memory.dmp