Malware Analysis Report

2024-09-11 15:24

Sample ID 240612-daxblazakj
Target c0a99bc314392ebe539fa8b4743913ab.bin
SHA256 9d486dcc796349fb18f7b798029526b835cd4f1a5fd71a34587abba8b9fc82a4
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

9d486dcc796349fb18f7b798029526b835cd4f1a5fd71a34587abba8b9fc82a4

Threat Level: Known bad

The file c0a99bc314392ebe539fa8b4743913ab.bin was found to be: Known bad.

Malicious Activity Summary

stealc vidar discovery spyware stealer

Stealc

Vidar

Detect Vidar Stealer

Checks computer location settings

Reads data files stored by FTP clients

Checks installed software on the system

Suspicious use of SetThreadContext

Enumerates physical storage devices

Program crash

Delays execution with timeout.exe

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

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

2024-06-12 02:48

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-12 02:48

Reported

2024-06-12 02:51

Platform

win7-20240419-en

Max time kernel

118s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe"

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1600 wrote to memory of 3000 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\SysWOW64\WerFault.exe
PID 1600 wrote to memory of 3000 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\SysWOW64\WerFault.exe
PID 1600 wrote to memory of 3000 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\SysWOW64\WerFault.exe
PID 1600 wrote to memory of 3000 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe

"C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1600 -s 128

Network

N/A

Files

memory/1600-0-0x0000000000330000-0x0000000000331000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 02:48

Reported

2024-06-12 02:51

Platform

win10v2004-20240508-en

Max time kernel

143s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.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-1-5-21-1181767204-2009306918-3718769404-1000\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 744 set thread context of 3952 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.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 744 wrote to memory of 3952 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 744 wrote to memory of 3952 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 744 wrote to memory of 3952 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 744 wrote to memory of 3952 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 744 wrote to memory of 3952 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 744 wrote to memory of 3952 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 744 wrote to memory of 3952 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 744 wrote to memory of 3952 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 744 wrote to memory of 3952 N/A C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3952 wrote to memory of 3904 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\cmd.exe
PID 3952 wrote to memory of 3904 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\cmd.exe
PID 3952 wrote to memory of 3904 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe C:\Windows\SysWOW64\cmd.exe
PID 3904 wrote to memory of 516 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3904 wrote to memory of 516 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3904 wrote to memory of 516 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe

"C:\Users\Admin\AppData\Local\Temp\2b2fc854e5f12ad01f3e39ec3aafa9ff9338907f393a4b5f27702dc458d32d93.exe"

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

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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4216,i,9746875443948590908,1444894342962555245,262144 --variations-seed-version --mojo-platform-channel-handle=4500 /prefetch:8

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\DGCFHIDAKECF" & 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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 steamcommunity.com udp

Files

memory/744-0-0x00000000003F0000-0x00000000003F1000-memory.dmp

memory/3952-1-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3952-3-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3952-5-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3952-6-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3952-7-0x0000000000400000-0x0000000000648000-memory.dmp