Malware Analysis Report

2025-08-11 00:33

Sample ID 240505-12mykafc6s
Target 5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157
SHA256 5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157
Tags
stealc discovery spyware stealer
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

5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157

Threat Level: Known bad

The file 5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157 was found to be: Known bad.

Malicious Activity Summary

stealc discovery spyware stealer

Stealc

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

Detect binaries embedding considerable number of MFA browser extension IDs.

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

Downloads MZ/PE file

Loads dropped DLL

Reads data files stored by FTP clients

Reads user/profile data of web browsers

Checks installed software on the system

Accesses cryptocurrency files/wallets, possible credential harvesting

Program crash

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Checks processor information in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-05 22:08

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-05 22:08

Reported

2024-05-05 22:11

Platform

win7-20240221-en

Max time kernel

120s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157.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
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
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
N/A N/A N/A N/A

Downloads MZ/PE file

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

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157.exe

"C:\Users\Admin\AppData\Local\Temp\5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157.exe"

Network

Country Destination Domain Proto
DE 185.172.128.150:80 185.172.128.150 tcp

Files

memory/1924-1-0x0000000001B60000-0x0000000001C60000-memory.dmp

memory/1924-2-0x0000000000400000-0x000000000063B000-memory.dmp

memory/1924-3-0x0000000000400000-0x0000000001A1B000-memory.dmp

memory/1924-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp

\ProgramData\nss3.dll

MD5 1cc453cdf74f31e4d913ff9c10acdde2
SHA1 6e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512 dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

\ProgramData\mozglue.dll

MD5 c8fd9be83bc728cc04beffafc2907fe9
SHA1 95ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512 fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

memory/1924-64-0x0000000000400000-0x0000000001A1B000-memory.dmp

memory/1924-65-0x0000000000400000-0x000000000063B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-05 22:08

Reported

2024-05-05 22:11

Platform

win10v2004-20240419-en

Max time kernel

133s

Max time network

102s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157.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
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
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
N/A N/A N/A N/A

Downloads MZ/PE file

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

Enumerates physical storage devices

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157.exe

"C:\Users\Admin\AppData\Local\Temp\5843aa8280819e31b06f61a02cdf2c908c891bed32beb9860843b769a6f14157.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4016 -ip 4016

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4016 -s 2372

Network

Country Destination Domain Proto
DE 185.172.128.150:80 185.172.128.150 tcp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 150.128.172.185.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 88.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 138.201.86.20.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa 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 8.8.8.8:53 200.197.79.204.in-addr.arpa udp

Files

memory/4016-1-0x0000000001B80000-0x0000000001C80000-memory.dmp

memory/4016-2-0x0000000001AA0000-0x0000000001AC7000-memory.dmp

memory/4016-3-0x0000000000400000-0x000000000063B000-memory.dmp

memory/4016-4-0x0000000061E00000-0x0000000061EF3000-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

C:\ProgramData\Are.docx

MD5 a33e5b189842c5867f46566bdbf7a095
SHA1 e1c06359f6a76da90d19e8fd95e79c832edb3196
SHA256 5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454
SHA512 f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b

memory/4016-81-0x0000000000400000-0x000000000063B000-memory.dmp

memory/4016-80-0x0000000000400000-0x0000000001A1B000-memory.dmp