Malware Analysis Report

2024-09-11 16:48

Sample ID 240615-bzyjvaybnk
Target 5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe
SHA256 5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38
Tags
stealc vidar 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

5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38

Threat Level: Known bad

The file 5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe was found to be: Known bad.

Malicious Activity Summary

stealc vidar discovery spyware stealer

Detect Vidar Stealer

Vidar

Stealc

Detects executables containing potential Windows Defender anti-emulation checks

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

Detects Windows executables referencing non-Windows User-Agents

Deletes itself

Reads data files stored by FTP clients

Checks computer location settings

Checks installed software on the system

Enumerates physical storage devices

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

Delays execution with timeout.exe

Suspicious use of WriteProcessMemory

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

2024-06-15 01:35

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-15 01:35

Reported

2024-06-15 01:38

Platform

win7-20240508-en

Max time kernel

118s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe"

Signatures

Detect Vidar Stealer

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

Stealc

stealer stealc

Vidar

stealer vidar

Detects Windows executables referencing non-Windows User-Agents

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

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

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

Detects executables containing potential Windows Defender anti-emulation checks

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

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

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\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.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\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2072 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe C:\Windows\SysWOW64\cmd.exe
PID 2072 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe C:\Windows\SysWOW64\cmd.exe
PID 2072 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe C:\Windows\SysWOW64\cmd.exe
PID 2072 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe C:\Windows\SysWOW64\cmd.exe
PID 1928 wrote to memory of 1824 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1928 wrote to memory of 1824 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1928 wrote to memory of 1824 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1928 wrote to memory of 1824 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe

"C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe" & rd /s /q "C:\ProgramData\GHCGDAFCFHID" & exit

C:\Windows\SysWOW64\timeout.exe

timeout /t 10

Network

Country Destination Domain Proto
US 8.8.8.8:53 t.me udp
US 8.8.8.8:53 steamcommunity.com udp

Files

memory/2072-4-0x00000000000A0000-0x00000000000A1000-memory.dmp

memory/2072-2-0x00000000000A0000-0x00000000000A1000-memory.dmp

memory/2072-0-0x00000000000A0000-0x00000000000A1000-memory.dmp

memory/2072-7-0x00000000001A0000-0x00000000001A1000-memory.dmp

memory/2072-5-0x00000000001A0000-0x00000000001A1000-memory.dmp

memory/2072-9-0x00000000001A0000-0x00000000001A1000-memory.dmp

memory/2072-12-0x00000000001B0000-0x00000000001B1000-memory.dmp

memory/2072-14-0x00000000001B0000-0x00000000001B1000-memory.dmp

memory/2072-17-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/2072-19-0x00000000001C0000-0x00000000001C1000-memory.dmp

memory/2072-29-0x00000000001E0000-0x00000000001E1000-memory.dmp

memory/2072-27-0x00000000001E0000-0x00000000001E1000-memory.dmp

memory/2072-24-0x00000000001D0000-0x00000000001D1000-memory.dmp

memory/2072-22-0x00000000001D0000-0x00000000001D1000-memory.dmp

memory/2072-32-0x0000000001092000-0x00000000014BA000-memory.dmp

memory/2072-30-0x0000000000E50000-0x0000000001C15000-memory.dmp

memory/2072-34-0x0000000001092000-0x00000000014BA000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-15 01:35

Reported

2024-06-15 01:38

Platform

win10v2004-20240508-en

Max time kernel

51s

Max time network

54s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe"

Signatures

Detect Vidar Stealer

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

Stealc

stealer stealc

Vidar

stealer vidar

Detects Windows executables referencing non-Windows User-Agents

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

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

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

Detects executables containing potential Windows Defender anti-emulation checks

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe N/A

Reads data files stored by FTP clients

spyware stealer

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\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.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\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2504 wrote to memory of 3100 N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe C:\Windows\SysWOW64\cmd.exe
PID 2504 wrote to memory of 3100 N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe C:\Windows\SysWOW64\cmd.exe
PID 2504 wrote to memory of 3100 N/A C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe C:\Windows\SysWOW64\cmd.exe
PID 3100 wrote to memory of 2052 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3100 wrote to memory of 2052 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3100 wrote to memory of 2052 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe

"C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\5f5d2d0921c6917bd07ea44fbfef38efc470942736a13283ba4e15df051c0f38.exe" & rd /s /q "C:\ProgramData\CBGCBKFBGIII" & exit

C:\Windows\SysWOW64\timeout.exe

timeout /t 10

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 t.me udp
US 8.8.8.8:53 steamcommunity.com udp

Files

memory/2504-1-0x0000000000B70000-0x0000000000B71000-memory.dmp

memory/2504-0-0x0000000000B60000-0x0000000000B61000-memory.dmp

memory/2504-4-0x0000000001172000-0x000000000159A000-memory.dmp

memory/2504-6-0x0000000000EF0000-0x0000000000EF1000-memory.dmp

memory/2504-5-0x0000000000EE0000-0x0000000000EE1000-memory.dmp

memory/2504-8-0x0000000000F30000-0x0000000001CF5000-memory.dmp

memory/2504-3-0x0000000000ED0000-0x0000000000ED1000-memory.dmp

memory/2504-2-0x0000000000B80000-0x0000000000B81000-memory.dmp

memory/2504-10-0x0000000001172000-0x000000000159A000-memory.dmp

memory/2504-11-0x0000000001172000-0x000000000159A000-memory.dmp