Malware Analysis Report

2024-09-11 15:22

Sample ID 240611-xcwmmaxblb
Target cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a
SHA256 cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a
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

cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a

Threat Level: Known bad

The file cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a was found to be: Known bad.

Malicious Activity Summary

stealc vidar discovery spyware stealer

Detect Vidar Stealer

Stealc

Vidar

Downloads MZ/PE file

Executes dropped EXE

Reads data files stored by FTP clients

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

Delays execution with timeout.exe

Checks processor information in registry

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

2024-06-11 18:43

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-11 18:43

Reported

2024-06-11 18:45

Platform

win10v2004-20240426-en

Max time kernel

150s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.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

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\kat2F1E.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 3008 set thread context of 1384 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp

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\kat2F1E.tmp N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3008 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp
PID 3008 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp
PID 3008 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp
PID 3008 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp
PID 3008 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp
PID 3008 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp
PID 3008 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp
PID 3008 wrote to memory of 1384 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp

Processes

C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe

"C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe"

C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp

C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 t.me udp
NL 149.154.167.99:443 t.me tcp
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 36.249.124.192.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.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
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 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 98.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/3008-0-0x0000000002330000-0x0000000002331000-memory.dmp

memory/3008-2-0x00000000040D0000-0x00000000041E0000-memory.dmp

memory/1384-4-0x0000000000400000-0x0000000000648000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\kat2F1E.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/1384-10-0x0000000000400000-0x0000000000648000-memory.dmp

memory/3008-9-0x0000000000400000-0x0000000000594000-memory.dmp

memory/1384-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1384-22-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1384-23-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1384-25-0x000000001DC90000-0x000000001DEEF000-memory.dmp

memory/1384-40-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1384-41-0x0000000000400000-0x0000000000648000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 18:43

Reported

2024-06-11 18:45

Platform

win11-20240508-en

Max time kernel

79s

Max time network

100s

Command Line

"C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.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\kat753F.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 2556 set thread context of 440 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat753F.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\kat753F.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\kat753F.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat753F.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2556 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat753F.tmp
PID 2556 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat753F.tmp
PID 2556 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat753F.tmp
PID 2556 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat753F.tmp
PID 2556 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat753F.tmp
PID 2556 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat753F.tmp
PID 2556 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat753F.tmp
PID 2556 wrote to memory of 440 N/A C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe C:\Users\Admin\AppData\Local\Temp\kat753F.tmp
PID 440 wrote to memory of 3628 N/A C:\Users\Admin\AppData\Local\Temp\kat753F.tmp C:\Windows\SysWOW64\cmd.exe
PID 440 wrote to memory of 3628 N/A C:\Users\Admin\AppData\Local\Temp\kat753F.tmp C:\Windows\SysWOW64\cmd.exe
PID 440 wrote to memory of 3628 N/A C:\Users\Admin\AppData\Local\Temp\kat753F.tmp C:\Windows\SysWOW64\cmd.exe
PID 3628 wrote to memory of 4412 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3628 wrote to memory of 4412 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3628 wrote to memory of 4412 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe

"C:\Users\Admin\AppData\Local\Temp\cfb06fd433bd51e6981df87a55f35134e4704d77e8a53c12e23d6f2463809d8a.exe"

C:\Users\Admin\AppData\Local\Temp\kat753F.tmp

C:\Users\Admin\AppData\Local\Temp\kat753F.tmp

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat753F.tmp" & rd /s /q "C:\ProgramData\JJECGCBGDBKJ" & 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
IE 52.111.236.22:443 tcp

Files

memory/2556-0-0x0000000000860000-0x0000000000861000-memory.dmp

memory/2556-1-0x0000000004010000-0x0000000004120000-memory.dmp

memory/440-4-0x0000000000400000-0x0000000000648000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\kat753F.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/440-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/2556-10-0x0000000000400000-0x0000000000594000-memory.dmp

memory/440-9-0x0000000000400000-0x0000000000648000-memory.dmp

memory/440-11-0x0000000000400000-0x0000000000648000-memory.dmp

memory/440-12-0x0000000000400000-0x0000000000648000-memory.dmp

memory/440-13-0x0000000000400000-0x0000000000648000-memory.dmp

memory/440-14-0x0000000000400000-0x0000000000648000-memory.dmp

memory/440-17-0x0000000000400000-0x0000000000648000-memory.dmp