Malware Analysis Report

2024-11-16 13:45

Sample ID 240628-p9mrzs1bjb
Target 681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422
SHA256 681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422
Tags
stealc vidar 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

681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422

Threat Level: Known bad

The file 681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422 was found to be: Known bad.

Malicious Activity Summary

stealc vidar discovery spyware stealer

Stealc

Detect Vidar Stealer

Vidar

Downloads MZ/PE file

Reads data files stored by FTP clients

Checks computer location settings

Executes dropped EXE

Reads user/profile data of web browsers

Checks installed software on the system

Suspicious use of SetThreadContext

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Checks processor information in registry

Delays execution with timeout.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-28 13:01

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-28 13:01

Reported

2024-06-28 13:04

Platform

win10v2004-20240508-en

Max time kernel

39s

Max time network

47s

Command Line

"C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.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
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N/A N/A N/A N/A
N/A N/A N/A N/A
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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:\Users\Admin\AppData\Local\Temp\kat5709.tmp N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat5709.tmp 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 1992 set thread context of 4992 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat5709.tmp

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\kat5709.tmp N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\kat5709.tmp N/A

Delays execution with timeout.exe

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1992 wrote to memory of 4992 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat5709.tmp
PID 1992 wrote to memory of 4992 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat5709.tmp
PID 1992 wrote to memory of 4992 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat5709.tmp
PID 1992 wrote to memory of 4992 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat5709.tmp
PID 1992 wrote to memory of 4992 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat5709.tmp
PID 1992 wrote to memory of 4992 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat5709.tmp
PID 1992 wrote to memory of 4992 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat5709.tmp
PID 1992 wrote to memory of 4992 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat5709.tmp
PID 4992 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\kat5709.tmp C:\Windows\SysWOW64\cmd.exe
PID 4992 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\kat5709.tmp C:\Windows\SysWOW64\cmd.exe
PID 4992 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\kat5709.tmp C:\Windows\SysWOW64\cmd.exe
PID 1208 wrote to memory of 2272 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1208 wrote to memory of 2272 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1208 wrote to memory of 2272 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe

"C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe"

C:\Users\Admin\AppData\Local\Temp\kat5709.tmp

C:\Users\Admin\AppData\Local\Temp\kat5709.tmp

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat5709.tmp" & rd /s /q "C:\ProgramData\GCAFCAFHJJDB" & 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
US 8.8.8.8:53 tea.arpdabl.org udp

Files

memory/1992-0-0x00000000023D0000-0x00000000023D1000-memory.dmp

memory/1992-1-0x0000000004110000-0x0000000004220000-memory.dmp

memory/4992-4-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4992-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4992-9-0x0000000000400000-0x0000000000648000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\kat5709.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/1992-10-0x0000000000400000-0x0000000000635000-memory.dmp

memory/4992-11-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4992-12-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4992-13-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4992-14-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4992-15-0x0000000000400000-0x0000000000648000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-28 13:01

Reported

2024-06-28 13:04

Platform

win11-20240611-en

Max time kernel

146s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.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
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Stealc

stealer stealc

Vidar

stealer vidar

Downloads MZ/PE file

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp N/A

Reads user/profile data of web browsers

spyware stealer

Checks installed software on the system

discovery

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4024 set thread context of 4208 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4024 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp
PID 4024 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp
PID 4024 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp
PID 4024 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp
PID 4024 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp
PID 4024 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp
PID 4024 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp
PID 4024 wrote to memory of 4208 N/A C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp

Processes

C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe

"C:\Users\Admin\AppData\Local\Temp\681d9888e7c5557d61e57964e513e8469bfff3506979e24cadd3181bfc624422.exe"

C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp

C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp

Network

Country Destination Domain Proto
US 8.8.8.8:53 t.me udp
NL 149.154.167.99:443 t.me tcp
DE 195.201.251.214:9000 195.201.251.214 tcp
US 8.8.8.8:53 80.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 214.251.201.195.in-addr.arpa udp
US 8.8.8.8:53 22.249.124.192.in-addr.arpa udp
DE 195.201.251.214:9000 195.201.251.214 tcp
DE 195.201.251.214:9000 195.201.251.214 tcp
DE 195.201.251.214:9000 195.201.251.214 tcp
DE 195.201.251.214:9000 195.201.251.214 tcp
DE 195.201.251.214:9000 195.201.251.214 tcp
DE 195.201.251.214:9000 195.201.251.214 tcp
DE 195.201.251.214:9000 195.201.251.214 tcp
US 52.111.227.13:443 tcp

Files

memory/4024-0-0x0000000002390000-0x0000000002391000-memory.dmp

memory/4024-1-0x0000000002B00000-0x0000000002C10000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\kat4EAC.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/4024-10-0x0000000000400000-0x0000000000635000-memory.dmp

memory/4208-9-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4208-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4208-4-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4208-24-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4208-25-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4208-28-0x000000002F6A0000-0x000000002F8FF000-memory.dmp

memory/4208-35-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4208-36-0x0000000000400000-0x0000000000648000-memory.dmp