stealc | b2bf3753fffd1c058f60b8c0b9d5be9f165e92e91462729f2707534a4b3b69c2

Analysis

max time kernel
51s
max time network
51s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
18/06/2024, 12:55

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
Setup.exe
Size 446KB
Sample240618-p5ssfathph
SHA256 12c22ba646232d5d5087d0300d5cfd46fed424f26143a02dc866f1bfceab3c10
MD5 485008b43f0edceba0e0d3ca04bc1c1a
SHA1 55ae8f105af415bb763d1b87f6572f078052877c
SHA512 402652786daae635c7405f5fa0924d768cbde2086f9f57b10f00f921dec98e37168f5c3a6baa5593ba9a478f3971d32747c517ffd485d25634c924e6b08815b1
SSDEEP 12288:vK5+DMJA3TAz4plk9iZOOti81N5y1qMIg+GV5Zul3M:y5+DMJA3TAz4plk9ijK1qlGV7ulM
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery persistence privilege_escalation spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 2 IoCs

stealer

resource	yara_rule
behavioral2/memory/4476-22-0x0000000001000000-0x000000000174C000-memory.dmp	family_vidar_v7
behavioral2/memory/4476-43-0x0000000001000000-0x000000000174C000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	dcom.au3

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2828 set thread context of 3344	2828	Setup.exe	83

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Loads dropped DLL 1 IoCs

pid	Process
4476	dcom.au3

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Checks processor information in registry 2 TTPs 1 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dcom.au3

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2640	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2828	Setup.exe
2828	Setup.exe
3344	netsh.exe
3344	netsh.exe
4476	dcom.au3
4476	dcom.au3

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2828	Setup.exe
3344	netsh.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2828 wrote to memory of 3344	2828	Setup.exe	83
PID 2828 wrote to memory of 3344	2828	Setup.exe	83
PID 2828 wrote to memory of 3344	2828	Setup.exe	83
PID 2828 wrote to memory of 3344	2828	Setup.exe	83
PID 3344 wrote to memory of 4476	3344	netsh.exe	87
PID 3344 wrote to memory of 4476	3344	netsh.exe	87
PID 3344 wrote to memory of 4476	3344	netsh.exe	87
PID 3344 wrote to memory of 4476	3344	netsh.exe	87
PID 3344 wrote to memory of 4476	3344	netsh.exe	87
PID 4476 wrote to memory of 3696	4476	dcom.au3	89
PID 4476 wrote to memory of 3696	4476	dcom.au3	89
PID 4476 wrote to memory of 3696	4476	dcom.au3	89
PID 3696 wrote to memory of 2640	3696	cmd.exe	91
PID 3696 wrote to memory of 2640	3696	cmd.exe	91
PID 3696 wrote to memory of 2640	3696	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\Setup.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2828
- C:\Windows\SysWOW64\netsh.exe
  C:\Windows\SysWOW64\netsh.exe
  2⤵
  - Event Triggered Execution: Netsh Helper DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3344
- - C:\Users\Admin\AppData\Local\Temp\dcom.au3
    C:\Users\Admin\AppData\Local\Temp\dcom.au3
    3⤵
    - Checks computer location settings
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4476
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\Setup.exe" & rd /s /q "C:\ProgramData\BAKEBAFIIECB" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3696
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 10
        5⤵
        Delays execution with timeout.exe
        
        PID:2640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

b90396f6

Path C:\Users\Admin\AppData\Local\Temp\b90396f6
Size 6.8MB
SHA256 0758a4bbff976a10ef53ef1f0d7b65c67b8fd97e073a687125e4eef5416a5aa1
MD5 e697c5e60f77d8da9f8a8bbba9958b72
SHA1 4f57bee30dae65e0aa9c817b803a7e913a106567
SHA512 c30d2ca4ad1fb28a97aec62bcbd52bf7da1a2476e13391afa233c1bd23928d64920df0cd06a0b7217a57a03afa96179d5fd4a51132d0112d23dc18c2d9056d03
SSDEEP 196608:IaKiTf07PWmtAkHQdvnRrSW7uudoD1bIP/:IaTf07/wddSW7zdoDNk/
MD5 SHA1 SHA512 SSDEEP

Submit Download

dcom.au3

Path C:\Users\Admin\AppData\Local\Temp\dcom.au3
Size 872KB
SHA256 237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d
MD5 c56b5f0201a3b3de53e561fe76912bfd
SHA1 2a4062e10a5de813f5688221dbeb3f3ff33eb417
SHA512 195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c
SSDEEP 12288:6pVWeOV7GtINsegA/hMyyzlcqikvAfcN9b2MyZa31twoPTdFxgawV2M01:6T3E53Myyzl0hMf1tr7Caw8M01
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2828-0-0x00000000744C0000-0x000000007463B000-memory.dmp

Download

memory/2828-1-0x00007FF8CF2F0000-0x00007FF8CF4E5000-memory.dmp

Download

memory/2828-7-0x00000000744D2000-0x00000000744D4000-memory.dmp

Download

memory/2828-8-0x00000000744C0000-0x000000007463B000-memory.dmp

Download

memory/2828-9-0x00000000744C0000-0x000000007463B000-memory.dmp

Download

memory/3344-16-0x00000000744C1000-0x00000000744CF000-memory.dmp

Download

memory/3344-13-0x00007FF8CF2F0000-0x00007FF8CF4E5000-memory.dmp

Download

memory/3344-15-0x00000000744CE000-0x00000000744D0000-memory.dmp

Download

memory/3344-20-0x00000000744C1000-0x00000000744CF000-memory.dmp

Download

memory/3344-11-0x00000000744C1000-0x00000000744CF000-memory.dmp

Download

memory/4476-22-0x0000000001000000-0x000000000174C000-memory.dmp

Download

memory/4476-24-0x00007FF8CF2F0000-0x00007FF8CF4E5000-memory.dmp

Download

memory/4476-25-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Download

memory/4476-43-0x0000000001000000-0x000000000174C000-memory.dmp

Download