Malware Analysis Report

2024-11-16 13:43

Sample ID 240607-1lebgseb68
Target 91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b
SHA256 91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b
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

91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b

Threat Level: Known bad

The file 91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b was found to be: Known bad.

Malicious Activity Summary

stealc vidar discovery spyware stealer

Stealc

Vidar

Detect Vidar Stealer

Downloads MZ/PE file

Checks computer location settings

Executes dropped EXE

Reads data files stored by FTP clients

Reads user/profile data of web browsers

Accesses cryptocurrency files/wallets, possible credential harvesting

Checks installed software on the system

Suspicious use of SetThreadContext

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Checks processor information in registry

Delays execution with timeout.exe

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-07 21:43

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-07 21:43

Reported

2024-06-07 21:46

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe"

Signatures

Detect Vidar Stealer

stealer
Description Indicator Process Target
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Stealc

stealer stealc

Vidar

stealer vidar

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\kat5062.tmp N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat5062.tmp N/A

Reads data files stored by FTP clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Accesses cryptocurrency files/wallets, possible credential harvesting

spyware

Checks installed software on the system

discovery

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3700 set thread context of 1520 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat5062.tmp

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\kat5062.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 3700 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat5062.tmp
PID 3700 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat5062.tmp
PID 3700 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat5062.tmp
PID 3700 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat5062.tmp
PID 3700 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat5062.tmp
PID 3700 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat5062.tmp
PID 3700 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat5062.tmp
PID 3700 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat5062.tmp
PID 1520 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Local\Temp\kat5062.tmp C:\Windows\SysWOW64\cmd.exe
PID 1520 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Local\Temp\kat5062.tmp C:\Windows\SysWOW64\cmd.exe
PID 1520 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Local\Temp\kat5062.tmp C:\Windows\SysWOW64\cmd.exe
PID 1532 wrote to memory of 4352 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1532 wrote to memory of 4352 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1532 wrote to memory of 4352 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe

"C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe"

C:\Users\Admin\AppData\Local\Temp\kat5062.tmp

C:\Users\Admin\AppData\Local\Temp\kat5062.tmp

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat5062.tmp" & rd /s /q "C:\ProgramData\CGIJJKEHCAKE" & exit

C:\Windows\SysWOW64\timeout.exe

timeout /t 10

Network

Country Destination Domain Proto
US 8.8.8.8:53 t.me udp
NL 149.154.167.99:443 t.me tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 145.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 99.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 23.249.124.192.in-addr.arpa udp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
US 8.8.8.8:53 18.190.202.116.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 105.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 26.178.89.13.in-addr.arpa udp

Files

memory/3700-0-0x0000000002410000-0x0000000002411000-memory.dmp

memory/3700-2-0x0000000002BD0000-0x0000000002D33000-memory.dmp

memory/1520-4-0x0000000000400000-0x0000000000648000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\kat5062.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/1520-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1520-10-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3700-9-0x0000000000400000-0x000000000067A000-memory.dmp

memory/1520-22-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1520-23-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1520-25-0x000000001DBF0000-0x000000001DE4F000-memory.dmp

memory/1520-40-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1520-41-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1520-57-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1520-58-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1520-69-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1520-70-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1520-71-0x0000000000400000-0x0000000000648000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-07 21:43

Reported

2024-06-07 21:46

Platform

win11-20240508-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.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
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N/A N/A N/A N/A

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\kat7290.tmp N/A

Reads data files stored by FTP clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Accesses cryptocurrency files/wallets, possible credential harvesting

spyware

Checks installed software on the system

discovery

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4980 set thread context of 4196 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat7290.tmp

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\kat7290.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 4980 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat7290.tmp
PID 4980 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat7290.tmp
PID 4980 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat7290.tmp
PID 4980 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat7290.tmp
PID 4980 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat7290.tmp
PID 4980 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat7290.tmp
PID 4980 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat7290.tmp
PID 4980 wrote to memory of 4196 N/A C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe C:\Users\Admin\AppData\Local\Temp\kat7290.tmp
PID 4196 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\kat7290.tmp C:\Windows\SysWOW64\cmd.exe
PID 4196 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\kat7290.tmp C:\Windows\SysWOW64\cmd.exe
PID 4196 wrote to memory of 2136 N/A C:\Users\Admin\AppData\Local\Temp\kat7290.tmp C:\Windows\SysWOW64\cmd.exe
PID 2136 wrote to memory of 4688 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2136 wrote to memory of 4688 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2136 wrote to memory of 4688 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe

"C:\Users\Admin\AppData\Local\Temp\91f05bbd2f4f01adaf7f6954c53aed03b2e608138db2004f18c0e1a9368d6a1b.exe"

C:\Users\Admin\AppData\Local\Temp\kat7290.tmp

C:\Users\Admin\AppData\Local\Temp\kat7290.tmp

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat7290.tmp" & rd /s /q "C:\ProgramData\CBKJEGCBKKJE" & exit

C:\Windows\SysWOW64\timeout.exe

timeout /t 10

Network

Country Destination Domain Proto
US 8.8.8.8:53 t.me udp
NL 149.154.167.99:443 t.me tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
US 8.8.8.8:53 99.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 18.190.202.116.in-addr.arpa udp
US 8.8.8.8:53 45.56.20.217.in-addr.arpa udp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp
DE 116.202.190.18:5432 116.202.190.18 tcp

Files

memory/4980-0-0x00000000023D0000-0x00000000023D1000-memory.dmp

memory/4980-1-0x0000000002BB0000-0x0000000002D13000-memory.dmp

memory/4196-4-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4196-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4196-9-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4980-10-0x0000000000400000-0x000000000067A000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\kat7290.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/4196-15-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4196-16-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4196-18-0x000000001B7F0000-0x000000001BA4F000-memory.dmp

memory/4196-33-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4196-34-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4196-50-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4196-51-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4196-62-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4196-63-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4196-66-0x0000000000400000-0x0000000000648000-memory.dmp