Malware Analysis Report

2024-09-11 16:32

Sample ID 240614-qxyjdswgmj
Target file.exe
SHA256 0d6494a16aec93bbf79227151adcb085328b2af646f5a65b17a98b7762cd77df
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

0d6494a16aec93bbf79227151adcb085328b2af646f5a65b17a98b7762cd77df

Threat Level: Known bad

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

Malicious Activity Summary

stealc vidar discovery spyware stealer

Vidar

Stealc

Detect Vidar Stealer

Checks computer location settings

Reads data files stored by FTP clients

Checks installed software on the system

Suspicious use of SetThreadContext

Program crash

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Checks processor information in registry

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

2024-06-14 13:39

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 13:39

Reported

2024-06-14 13:41

Platform

win7-20240611-en

Max time kernel

117s

Max time network

122s

Command Line

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

Signatures

Program crash

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2784 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\WerFault.exe
PID 2784 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\WerFault.exe
PID 2784 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\WerFault.exe
PID 2784 wrote to memory of 1104 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\SysWOW64\WerFault.exe

Processes

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2784 -s 68

Network

N/A

Files

memory/2784-0-0x0000000000020000-0x0000000000021000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 13:39

Reported

2024-06-14 13:41

Platform

win10v2004-20240508-en

Max time kernel

62s

Max time network

51s

Command Line

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

Signatures

Detect Vidar Stealer

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

Stealc

stealer stealc

Vidar

stealer vidar

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Reads data files stored by FTP clients

spyware stealer

Checks installed software on the system

discovery

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3112 set thread context of 3528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

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:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.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:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3112 wrote to memory of 3528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3112 wrote to memory of 3528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3112 wrote to memory of 3528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3112 wrote to memory of 3528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3112 wrote to memory of 3528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3112 wrote to memory of 3528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3112 wrote to memory of 3528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3112 wrote to memory of 3528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3112 wrote to memory of 3528 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3528 wrote to memory of 2240 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\cmd.exe
PID 3528 wrote to memory of 2240 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\cmd.exe
PID 3528 wrote to memory of 2240 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\cmd.exe
PID 2240 wrote to memory of 3360 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2240 wrote to memory of 3360 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2240 wrote to memory of 3360 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

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

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

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" & rd /s /q "C:\ProgramData\HCFBFBAEBKJK" & 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/3112-0-0x0000000000630000-0x0000000000631000-memory.dmp

memory/3528-1-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3528-3-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3528-5-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3528-6-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3528-7-0x0000000000400000-0x0000000000648000-memory.dmp