Malware Analysis Report

2024-09-11 16:29

Sample ID 240614-b2yydszfrd
Target b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94
SHA256 b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94
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

b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94

Threat Level: Known bad

The file b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94 was found to be: Known bad.

Malicious Activity Summary

stealc vidar discovery spyware stealer

Detect Vidar Stealer

Vidar

Stealc

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

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 01:39

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 01:39

Reported

2024-06-14 01:41

Platform

win10v2004-20240611-en

Max time kernel

92s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.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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Stealc

stealer stealc

Vidar

stealer vidar

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat3BA1.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 1956 set thread context of 2008 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat3BA1.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\kat3BA1.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 behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1956 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp
PID 1956 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp
PID 1956 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp
PID 1956 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp
PID 1956 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp
PID 1956 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp
PID 1956 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp
PID 1956 wrote to memory of 2008 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp
PID 2008 wrote to memory of 2340 N/A C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp C:\Windows\SysWOW64\cmd.exe
PID 2008 wrote to memory of 2340 N/A C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp C:\Windows\SysWOW64\cmd.exe
PID 2008 wrote to memory of 2340 N/A C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp C:\Windows\SysWOW64\cmd.exe
PID 2340 wrote to memory of 3944 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2340 wrote to memory of 3944 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2340 wrote to memory of 3944 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe

"C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe"

C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp

C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp" & rd /s /q "C:\ProgramData\IEGCBFHJDHJJ" & 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
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.194:443 www.bing.com tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 43.43.201.23.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
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
US 8.8.8.8:53 244.235.13.49.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 89.43.201.23.in-addr.arpa udp

Files

memory/1956-0-0x0000000000940000-0x0000000000941000-memory.dmp

memory/1956-1-0x0000000003DF0000-0x0000000003F00000-memory.dmp

memory/2008-4-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1956-10-0x0000000000400000-0x0000000000629000-memory.dmp

memory/2008-9-0x0000000000400000-0x0000000000648000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\kat3BA1.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/2008-20-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-21-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-24-0x000000001B760000-0x000000001B9BF000-memory.dmp

memory/2008-31-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-32-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-40-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-41-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-57-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-58-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-69-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-70-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2008-71-0x0000000000400000-0x0000000000648000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 01:39

Reported

2024-06-14 01:41

Platform

win11-20240508-en

Max time kernel

146s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.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
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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat7918.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 4792 set thread context of 1208 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat7918.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\kat7918.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 behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat7918.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat7918.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4792 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat7918.tmp
PID 4792 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat7918.tmp
PID 4792 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat7918.tmp
PID 4792 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat7918.tmp
PID 4792 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat7918.tmp
PID 4792 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat7918.tmp
PID 4792 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat7918.tmp
PID 4792 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe C:\Users\Admin\AppData\Local\Temp\kat7918.tmp
PID 1208 wrote to memory of 4164 N/A C:\Users\Admin\AppData\Local\Temp\kat7918.tmp C:\Windows\SysWOW64\cmd.exe
PID 1208 wrote to memory of 4164 N/A C:\Users\Admin\AppData\Local\Temp\kat7918.tmp C:\Windows\SysWOW64\cmd.exe
PID 1208 wrote to memory of 4164 N/A C:\Users\Admin\AppData\Local\Temp\kat7918.tmp C:\Windows\SysWOW64\cmd.exe
PID 4164 wrote to memory of 432 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4164 wrote to memory of 432 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4164 wrote to memory of 432 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe

"C:\Users\Admin\AppData\Local\Temp\b3a9f1a9034aec66175aa371849a5daa424d0bd2a5daf1ccd932a979a4838b94.exe"

C:\Users\Admin\AppData\Local\Temp\kat7918.tmp

C:\Users\Admin\AppData\Local\Temp\kat7918.tmp

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat7918.tmp" & rd /s /q "C:\ProgramData\IIIECAAKECFH" & 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/4792-0-0x00000000026D0000-0x00000000026D1000-memory.dmp

memory/4792-2-0x0000000002B60000-0x0000000002C70000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\kat7918.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/1208-7-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1208-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4792-10-0x0000000000400000-0x0000000000629000-memory.dmp

memory/1208-9-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1208-11-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1208-12-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1208-13-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1208-14-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1208-15-0x0000000000400000-0x0000000000648000-memory.dmp