Malware Analysis Report

2024-11-16 13:51

Sample ID 240607-xztrjscd2z
Target 3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651
SHA256 3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651
Tags
stealc default12 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

3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651

Threat Level: Known bad

The file 3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651 was found to be: Known bad.

Malicious Activity Summary

stealc default12 discovery spyware stealer

Stealc

Downloads MZ/PE file

Reads data files stored by FTP clients

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Reads user/profile data of web browsers

Accesses cryptocurrency files/wallets, possible credential harvesting

Checks installed software on the system

Program crash

Enumerates physical storage devices

Unsigned PE

Checks processor information in registry

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-07 19:17

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-07 19:17

Reported

2024-06-07 19:20

Platform

win10v2004-20240426-en

Max time kernel

94s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe"

Signatures

Stealc

stealer stealc

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe N/A

Executes dropped EXE

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

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\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe

"C:\Users\Admin\AppData\Local\Temp\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\AFIIIIJKFC.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2136 -ip 2136

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2136 -s 2404

Network

Country Destination Domain Proto
DE 185.172.128.170:80 185.172.128.170 tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 170.128.172.185.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 98.251.17.2.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
DE 185.172.128.159:80 185.172.128.159 tcp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 159.128.172.185.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 130.211.222.173.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp

Files

memory/2136-2-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2136-1-0x0000000001EC0000-0x0000000001FC0000-memory.dmp

memory/2136-3-0x0000000000400000-0x0000000001BBF000-memory.dmp

memory/2136-4-0x0000000061E00000-0x0000000061EF3000-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

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

MD5 6c93fc68e2f01c20fb81af24470b790c
SHA1 d5927b38a32e30afcf5a658612a8266476fc4ad8
SHA256 64a71b664d76641b35dac312161cb356b3b3b5f0b45c9d88c8afa547b4902580
SHA512 355e9677121ef17cf8c398f0c17399776d206c62014080a2c62682e1152ea0729dcc6e233358dcd6bae009b07e3db936d4b18eb37d6e7ebc2fe9cf8d827c4ade

memory/2136-89-0x0000000000400000-0x0000000001BBF000-memory.dmp

memory/2136-90-0x0000000000400000-0x000000000063B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-07 19:17

Reported

2024-06-07 19:20

Platform

win11-20240426-en

Max time kernel

90s

Max time network

99s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe"

Signatures

Stealc

stealer stealc

Downloads MZ/PE file

Executes dropped EXE

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

Enumerates physical storage devices

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe

"C:\Users\Admin\AppData\Local\Temp\3f87671166107008ce7b37877b6f85da7d594d9b4f042a533cbb5a96a689f651.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\FCBFBGDBKJ.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1844 -ip 1844

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1844 -s 2036

Network

Country Destination Domain Proto
DE 185.172.128.170:80 185.172.128.170 tcp
US 8.8.8.8:53 170.128.172.185.in-addr.arpa udp
DE 185.172.128.159:80 185.172.128.159 tcp
IE 52.111.236.22:443 tcp

Files

memory/1844-1-0x0000000001C90000-0x0000000001D90000-memory.dmp

memory/1844-3-0x0000000000400000-0x000000000063B000-memory.dmp

memory/1844-2-0x00000000038C0000-0x00000000038E7000-memory.dmp

memory/1844-4-0x0000000061E00000-0x0000000061EF3000-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

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

MD5 6c93fc68e2f01c20fb81af24470b790c
SHA1 d5927b38a32e30afcf5a658612a8266476fc4ad8
SHA256 64a71b664d76641b35dac312161cb356b3b3b5f0b45c9d88c8afa547b4902580
SHA512 355e9677121ef17cf8c398f0c17399776d206c62014080a2c62682e1152ea0729dcc6e233358dcd6bae009b07e3db936d4b18eb37d6e7ebc2fe9cf8d827c4ade

memory/1844-90-0x0000000000400000-0x000000000063B000-memory.dmp

memory/1844-89-0x0000000000400000-0x0000000001BBF000-memory.dmp