Malware Analysis Report

2024-12-07 17:31

Sample ID 241112-byzqhsvkhj
Target 36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN
SHA256 36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdf
Tags
stealc default9_cap credential_access 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

36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdf

Threat Level: Known bad

The file 36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN was found to be: Known bad.

Malicious Activity Summary

stealc default9_cap credential_access discovery spyware stealer

Stealc family

Stealc

Checks computer location settings

Unsecured Credentials: Credentials In Files

Reads data files stored by FTP clients

Deletes itself

Checks installed software on the system

System Location Discovery: System Language Discovery

Unsigned PE

Program crash

Enumerates physical storage devices

Delays execution with timeout.exe

Checks processor information in registry

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-12 01:33

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-12 01:33

Reported

2024-11-12 01:35

Platform

win7-20241010-en

Max time kernel

119s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe"

Signatures

Stealc

stealer stealc

Stealc family

stealc

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Reads data files stored by FTP clients

spyware stealer

Unsecured Credentials: Credentials In Files

credential_access stealer

Checks installed software on the system

discovery

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\timeout.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe

"C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe" & del "C:\ProgramData\*.dll"" & exit

C:\Windows\SysWOW64\timeout.exe

timeout /t 5

Network

Country Destination Domain Proto
RU 62.204.41.177:80 62.204.41.177 tcp

Files

memory/2448-1-0x0000000002D40000-0x0000000002E40000-memory.dmp

memory/2448-2-0x0000000000260000-0x00000000002AE000-memory.dmp

memory/2448-3-0x0000000000400000-0x0000000000661000-memory.dmp

memory/2448-6-0x0000000000400000-0x0000000000661000-memory.dmp

memory/2448-5-0x0000000000260000-0x00000000002AE000-memory.dmp

memory/2448-4-0x0000000000400000-0x0000000002B75000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-12 01:33

Reported

2024-11-12 01:36

Platform

win10v2004-20241007-en

Max time kernel

95s

Max time network

104s

Command Line

"C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe"

Signatures

Stealc

stealer stealc

Stealc family

stealc

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe N/A

Reads data files stored by FTP clients

spyware stealer

Unsecured Credentials: Credentials In Files

credential_access stealer

Checks installed software on the system

discovery

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\timeout.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe

"C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\36adccf26258fc28030c7b0ce17e5c8525cc1127a8505558f1dfc8dd9a52efdfN.exe" & del "C:\ProgramData\*.dll"" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3804 -ip 3804

C:\Windows\SysWOW64\timeout.exe

timeout /t 5

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 1540

Network

Country Destination Domain Proto
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
RU 62.204.41.177:80 62.204.41.177 tcp
US 8.8.8.8:53 177.41.204.62.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 98.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/3804-1-0x0000000002DA0000-0x0000000002EA0000-memory.dmp

memory/3804-2-0x0000000002D00000-0x0000000002D4E000-memory.dmp

memory/3804-3-0x0000000000400000-0x0000000000661000-memory.dmp

memory/3804-6-0x0000000000400000-0x0000000000661000-memory.dmp

memory/3804-5-0x0000000002D00000-0x0000000002D4E000-memory.dmp

memory/3804-4-0x0000000000400000-0x0000000002B75000-memory.dmp