Malware Analysis Report

2024-09-11 16:28

Sample ID 240614-bq5a2azbmc
Target b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b
SHA256 b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b
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

b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b

Threat Level: Known bad

The file b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b was found to be: Known bad.

Malicious Activity Summary

stealc vidar discovery spyware stealer

Detect Vidar Stealer

Vidar

Stealc

Downloads MZ/PE file

Reads user/profile data of web browsers

Reads data files stored by FTP clients

Executes dropped EXE

Checks computer location settings

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 Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-14 01:21

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 01:21

Reported

2024-06-14 01:24

Platform

win10v2004-20240611-en

Max time kernel

133s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe"

Signatures

Detect Vidar Stealer

stealer
Description Indicator Process Target
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-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\katED4E.tmp N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\katED4E.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 3564 set thread context of 3844 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\katED4E.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\katED4E.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 3564 wrote to memory of 3844 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\katED4E.tmp
PID 3564 wrote to memory of 3844 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\katED4E.tmp
PID 3564 wrote to memory of 3844 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\katED4E.tmp
PID 3564 wrote to memory of 3844 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\katED4E.tmp
PID 3564 wrote to memory of 3844 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\katED4E.tmp
PID 3564 wrote to memory of 3844 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\katED4E.tmp
PID 3564 wrote to memory of 3844 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\katED4E.tmp
PID 3564 wrote to memory of 3844 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\katED4E.tmp
PID 3844 wrote to memory of 4232 N/A C:\Users\Admin\AppData\Local\Temp\katED4E.tmp C:\Windows\SysWOW64\cmd.exe
PID 3844 wrote to memory of 4232 N/A C:\Users\Admin\AppData\Local\Temp\katED4E.tmp C:\Windows\SysWOW64\cmd.exe
PID 3844 wrote to memory of 4232 N/A C:\Users\Admin\AppData\Local\Temp\katED4E.tmp C:\Windows\SysWOW64\cmd.exe
PID 4232 wrote to memory of 2796 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4232 wrote to memory of 2796 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4232 wrote to memory of 2796 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe

"C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe"

C:\Users\Admin\AppData\Local\Temp\katED4E.tmp

C:\Users\Admin\AppData\Local\Temp\katED4E.tmp

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 --field-trial-handle=1300,i,17325488789339133686,9539570259395798500,262144 --variations-seed-version --mojo-platform-channel-handle=4436 /prefetch:8

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

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --field-trial-handle=2980,i,17325488789339133686,9539570259395798500,262144 --variations-seed-version --mojo-platform-channel-handle=1296 /prefetch:3

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\katED4E.tmp" & rd /s /q "C:\ProgramData\BKJEHCAKFBGD" & 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 4.159.190.20.in-addr.arpa udp
NL 149.154.167.99:443 t.me tcp
DE 49.13.235.244:5432 49.13.235.244 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 89.43.201.23.in-addr.arpa udp
US 8.8.8.8:53 99.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 244.235.13.49.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.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 8.8.8.8:53 194.61.62.23.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 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 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/3564-0-0x0000000002480000-0x0000000002481000-memory.dmp

memory/3564-1-0x0000000002AD0000-0x0000000002BE0000-memory.dmp

memory/3844-4-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-9-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3564-10-0x0000000000400000-0x0000000000629000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\katED4E.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/3844-11-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-12-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-14-0x0000000023B40000-0x0000000023D9F000-memory.dmp

memory/3844-22-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-23-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-31-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-32-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-48-0x0000000000400000-0x0000000000648000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\SCT Auditing Pending Reports

MD5 d751713988987e9331980363e24189ce
SHA1 97d170e1550eee4afc0af065b78cda302a97674c
SHA256 4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945
SHA512 b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

memory/3844-55-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-66-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-67-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3844-70-0x0000000000400000-0x0000000000648000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Sdch Dictionaries

MD5 20d4b8fa017a12a108c87f540836e250
SHA1 1ac617fac131262b6d3ce1f52f5907e31d5f6f00
SHA256 6028bd681dbf11a0a58dde8a0cd884115c04caa59d080ba51bde1b086ce0079d
SHA512 507b2b8a8a168ff8f2bdafa5d9d341c44501a5f17d9f63f3d43bd586bc9e8ae33221887869fa86f845b7d067cb7d2a7009efd71dda36e03a40a74fee04b86856

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 01:21

Reported

2024-06-14 01:24

Platform

win11-20240611-en

Max time kernel

146s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe"

Signatures

Detect Vidar Stealer

stealer
Description Indicator Process Target
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\kat7B2B.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 3308 set thread context of 4144 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\kat7B2B.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\kat7B2B.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 3308 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp
PID 3308 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp
PID 3308 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp
PID 3308 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp
PID 3308 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp
PID 3308 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp
PID 3308 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp
PID 3308 wrote to memory of 4144 N/A C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp
PID 4144 wrote to memory of 4824 N/A C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp C:\Windows\SysWOW64\cmd.exe
PID 4144 wrote to memory of 4824 N/A C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp C:\Windows\SysWOW64\cmd.exe
PID 4144 wrote to memory of 4824 N/A C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp C:\Windows\SysWOW64\cmd.exe
PID 4824 wrote to memory of 2288 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4824 wrote to memory of 2288 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4824 wrote to memory of 2288 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe

"C:\Users\Admin\AppData\Local\Temp\b41925f0234f077f3ab93c2586ceae9076d708c670d681838d60099969bbf46b.exe"

C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp

C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp" & rd /s /q "C:\ProgramData\BKKKFCFIIJJK" & 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 99.167.154.149.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 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

Files

memory/3308-0-0x00000000024A0000-0x00000000024A1000-memory.dmp

memory/3308-2-0x0000000002BD0000-0x0000000002CE0000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\kat7B2B.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/4144-4-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3308-9-0x0000000000400000-0x0000000000629000-memory.dmp

memory/4144-10-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-22-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-23-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-25-0x0000000026050000-0x00000000262AF000-memory.dmp

memory/4144-33-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-34-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-42-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-43-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-59-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-60-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-74-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-75-0x0000000000400000-0x0000000000648000-memory.dmp

memory/4144-78-0x0000000000400000-0x0000000000648000-memory.dmp