Malware Analysis Report

2024-09-11 16:55

Sample ID 240613-2kx8mstbng
Target 1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017
SHA256 1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017
Tags
stealc default12 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

1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017

Threat Level: Known bad

The file 1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017 was found to be: Known bad.

Malicious Activity Summary

stealc default12 discovery spyware stealer

Stealc

Downloads MZ/PE file

Reads user/profile data of web browsers

Loads dropped DLL

Executes dropped EXE

Reads data files stored by FTP clients

Checks installed software on the system

Accesses cryptocurrency files/wallets, possible credential harvesting

Program crash

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Unsecured Credentials
T1552
Credentials In Files
T1552.001
Discovery
TA0007
Query Registry
T1012
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Data from Local System
T1005
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-13 22:39

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-13 22:39

Reported

2024-06-13 22:44

Platform

win7-20240611-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.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\EBFBKFBGII.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe N/A
N/A N/A C:\Windows\SysWOW64\cmd.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\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2648 wrote to memory of 2256 N/A C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe C:\Windows\SysWOW64\cmd.exe
PID 2648 wrote to memory of 2256 N/A C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe C:\Windows\SysWOW64\cmd.exe
PID 2648 wrote to memory of 2256 N/A C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe C:\Windows\SysWOW64\cmd.exe
PID 2648 wrote to memory of 2256 N/A C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe C:\Windows\SysWOW64\cmd.exe
PID 2256 wrote to memory of 928 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Local\Temp\EBFBKFBGII.exe
PID 2256 wrote to memory of 928 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Local\Temp\EBFBKFBGII.exe
PID 2256 wrote to memory of 928 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Local\Temp\EBFBKFBGII.exe
PID 2256 wrote to memory of 928 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Local\Temp\EBFBKFBGII.exe

Processes

C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe

"C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe"

C:\Windows\SysWOW64\cmd.exe

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

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

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

Network

Country Destination Domain Proto
DE 185.172.128.170:80 tcp
DE 185.172.128.170:80 185.172.128.170 tcp
DE 185.172.128.170:80 185.172.128.170 tcp
DE 185.172.128.159:80 185.172.128.159 tcp

Files

memory/2648-2-0x0000000000220000-0x0000000000247000-memory.dmp

memory/2648-3-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2648-1-0x0000000001CB0000-0x0000000001DB0000-memory.dmp

memory/2648-4-0x0000000000400000-0x0000000001BC1000-memory.dmp

memory/2648-5-0x0000000001CB0000-0x0000000001DB0000-memory.dmp

memory/2648-7-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2648-8-0x0000000000400000-0x0000000001BC1000-memory.dmp

memory/2648-10-0x0000000061E00000-0x0000000061EF3000-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/2648-73-0x0000000000400000-0x0000000001BC1000-memory.dmp

memory/2648-83-0x0000000001CB0000-0x0000000001DB0000-memory.dmp

memory/2648-82-0x0000000000400000-0x000000000063B000-memory.dmp

memory/2648-81-0x0000000000400000-0x0000000001BC1000-memory.dmp

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

MD5 6c93fc68e2f01c20fb81af24470b790c
SHA1 d5927b38a32e30afcf5a658612a8266476fc4ad8
SHA256 64a71b664d76641b35dac312161cb356b3b3b5f0b45c9d88c8afa547b4902580
SHA512 355e9677121ef17cf8c398f0c17399776d206c62014080a2c62682e1152ea0729dcc6e233358dcd6bae009b07e3db936d4b18eb37d6e7ebc2fe9cf8d827c4ade

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-13 22:39

Reported

2024-06-13 22:44

Platform

win10-20240404-en

Max time kernel

291s

Max time network

189s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe"

Signatures

Stealc

stealer stealc

Reads user/profile data of web browsers

spyware stealer

Checks installed software on the system

discovery

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe

"C:\Users\Admin\AppData\Local\Temp\1b22d591b5b5e0df440369831ce403f2297f2d1f83d528d76868ccbe07017017.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1260 -s 1004

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
US 8.8.8.8:53 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.0.8.0.8.0.8.0.ip6.arpa udp
US 8.8.8.8:53 50.251.17.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/1260-1-0x0000000001D70000-0x0000000001E70000-memory.dmp

memory/1260-3-0x0000000000400000-0x000000000063B000-memory.dmp

memory/1260-2-0x0000000001D10000-0x0000000001D37000-memory.dmp

memory/1260-4-0x0000000000400000-0x0000000001BC1000-memory.dmp

memory/1260-5-0x0000000001D70000-0x0000000001E70000-memory.dmp

memory/1260-7-0x0000000000400000-0x000000000063B000-memory.dmp

memory/1260-11-0x0000000000400000-0x0000000001BC1000-memory.dmp