Malware Analysis Report

2024-09-22 06:57

Sample ID 240615-yqefyawhlr
Target 2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4
SHA256 2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4
Tags
stealc default discovery spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4

Threat Level: Known bad

The file 2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4 was found to be: Known bad.

Malicious Activity Summary

stealc default discovery spyware stealer

Stealc

Detect binaries embedding considerable number of MFA browser extension IDs.

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs.

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

Downloads MZ/PE file

Reads data files stored by FTP clients

Loads dropped DLL

Reads user/profile data of web browsers

Checks installed software on the system

Accesses cryptocurrency files/wallets, possible credential harvesting

Suspicious use of SetThreadContext

Program crash

Suspicious use of WriteProcessMemory

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-15 19:59

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-15 19:59

Reported

2024-06-15 20:01

Platform

win7-20240220-en

Max time kernel

118s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe

"C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2080 -s 68

Network

N/A

Files

memory/2080-0-0x0000000000020000-0x0000000000021000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-15 19:59

Reported

2024-06-15 20:01

Platform

win10v2004-20240611-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe"

Signatures

Stealc

stealer stealc

Detect binaries embedding considerable number of MFA browser extension IDs.

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

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs.

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

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

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

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 2516 set thread context of 4540 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.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 2516 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2516 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2516 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2516 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2516 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2516 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2516 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2516 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2516 wrote to memory of 4540 N/A C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.exe

"C:\Users\Admin\AppData\Local\Temp\2a98c1dde08c8cca1d331e7b369d26711153b97adb82e444a3905721c49862d4.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
RU 94.228.166.55:80 94.228.166.55 tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 55.166.228.94.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/2516-0-0x00000000017E0000-0x00000000017E1000-memory.dmp

memory/4540-1-0x0000000000400000-0x000000000063C000-memory.dmp

memory/4540-3-0x0000000000400000-0x000000000063C000-memory.dmp

memory/4540-4-0x0000000000400000-0x000000000063C000-memory.dmp

memory/4540-5-0x0000000061E00000-0x0000000061EF3000-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/4540-77-0x0000000000400000-0x000000000063C000-memory.dmp