stealc | 3aeea541c4fcdbf46b3e904522682e638b9ca7a981379864a72cf2274654419e

Analysis

max time kernel
146s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
15/06/2024, 12:05

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General

Target

setup.exe
Size

316KB
MD5

c637e5ecf625b72f4bef9d28cd81d612
SHA1

a2c1329d290e508ee9fd0eb81e7f25d57e450f8c
SHA256

111c56593668be63e1e0c79a2d33d9e2d49cdf0c5100663c72045bc6b76e9fe6
SHA512

727d78bab4fab3674eec92ca5f07df6a0095ab3b973dd227c599c70e8493592bb53bb9208cc6270713283ef0065acfad3203ddcf4dcb6d43f8727f09ceaaf2e4
SSDEEP

6144:VzsRSKkhKKXDD2mTLGxelHJ+SBae3VFpSX:6VkhZWEGxelH0SBtfpS

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 2 IoCs

stealer

resource	yara_rule
behavioral8/memory/5024-22-0x0000000000C20000-0x000000000136B000-memory.dmp	family_vidar_v7
behavioral8/memory/5024-37-0x0000000000C20000-0x000000000136B000-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

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	coml.au3

Loads dropped DLL 1 IoCs

pid	Process
5024	coml.au3

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 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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2544 set thread context of 2908	2544	setup.exe	83

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

System Information Discovery
T1082

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	coml.au3

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4792	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2544	setup.exe
2544	setup.exe
2908	netsh.exe
2908	netsh.exe
5024	coml.au3
5024	coml.au3

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2544	setup.exe
2908	netsh.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 2908	2544	setup.exe	83
PID 2544 wrote to memory of 2908	2544	setup.exe	83
PID 2544 wrote to memory of 2908	2544	setup.exe	83
PID 2544 wrote to memory of 2908	2544	setup.exe	83
PID 2908 wrote to memory of 5024	2908	netsh.exe	85
PID 2908 wrote to memory of 5024	2908	netsh.exe	85
PID 2908 wrote to memory of 5024	2908	netsh.exe	85
PID 2908 wrote to memory of 5024	2908	netsh.exe	85
PID 2908 wrote to memory of 5024	2908	netsh.exe	85
PID 5024 wrote to memory of 5000	5024	coml.au3	87
PID 5024 wrote to memory of 5000	5024	coml.au3	87
PID 5024 wrote to memory of 5000	5024	coml.au3	87
PID 5000 wrote to memory of 4792	5000	cmd.exe	89
PID 5000 wrote to memory of 4792	5000	cmd.exe	89
PID 5000 wrote to memory of 4792	5000	cmd.exe	89

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:2544
- C:\Windows\SysWOW64\netsh.exe
  C:\Windows\SysWOW64\netsh.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2908
- - C:\Users\Admin\AppData\Local\Temp\coml.au3
    C:\Users\Admin\AppData\Local\Temp\coml.au3
    3⤵
    - Checks computer location settings
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:5024
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\coml.au3" & rd /s /q "C:\ProgramData\HIDAFHDHCBGD" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5000
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 10
        5⤵
        Delays execution with timeout.exe
        
        PID:4792

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\a93d3e60

Filesize
6.8MB

MD5
cc815556c62e16519b5475fbf2686000

SHA1
cbaef1952bfa16aa0b4ee7d577e59fb23bebfead

SHA256
129b592cf0a6bbc8dc042d486958bd34739cde930f55444c66451acf50808c48

SHA512
f3a0b4781cdd7f86e0c33f299fa5e3bad24aced1d88021e96f046c0285bb19257cb23b3488aa477a1e2e2094b7d38e02bab86c721c1c22fece74d27dc02045b5

Download Submit
C:\Users\Admin\AppData\Local\Temp\coml.au3

Filesize
872KB

MD5
c56b5f0201a3b3de53e561fe76912bfd

SHA1
2a4062e10a5de813f5688221dbeb3f3ff33eb417

SHA256
237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

SHA512
195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

Download Submit
memory/2544-0-0x00007FFFEF0B0000-0x00007FFFEF222000-memory.dmp

Filesize
1.4MB

Download
memory/2544-11-0x00007FFFEF0C8000-0x00007FFFEF0C9000-memory.dmp

Filesize
4KB

Download
memory/2544-12-0x00007FFFEF0B0000-0x00007FFFEF222000-memory.dmp

Filesize
1.4MB

Download
memory/2544-13-0x00007FFFEF0B0000-0x00007FFFEF222000-memory.dmp

Filesize
1.4MB

Download
memory/2908-16-0x00007FF80DF50000-0x00007FF80E145000-memory.dmp

Filesize
2.0MB

Download
memory/5024-22-0x0000000000C20000-0x000000000136B000-memory.dmp

Filesize
7.3MB

Download
memory/5024-24-0x00007FF80DF50000-0x00007FF80E145000-memory.dmp

Filesize
2.0MB

Download
memory/5024-25-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/5024-37-0x0000000000C20000-0x000000000136B000-memory.dmp

Filesize
7.3MB

Download