stealc | 32793e0595e6a373be32c8e25c7ea147e72c78102a09a889ada948a164dc86cb

Analysis

max time kernel
54s
max time network
57s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
19/06/2024, 01:53

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
Setup.exe
Size 94KB
Sample240619-cbemhawdrk
SHA256 040d121a3179f49cd3f33f4bc998bc8f78b7f560bfd93f279224d69e76a06e92
MD5 9a4cc0d8e7007f7ef20ca585324e0739
SHA1 f3e5a2e477cac4bab85940a2158eed78f2d74441
SHA512 54636a48141804112f5b4f2fc70cb7c959a041e5743aeedb5184091b51daa1d1a03f0016e8299c0d56d924c6c8ae585e4fc864021081ffdf1e6f3eab11dd43b3
SSDEEP 1536:9M/AhIxHHWMpdPa5wiE21M8kJIGFvb1Cwn/ZDs5yf:9M4SwMpdCq/IM8uIGfV/ZDso
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 3 IoCs

stealer

resource	yara_rule
behavioral2/memory/1444-21-0x0000000001010000-0x000000000175C000-memory.dmp	family_vidar_v7
behavioral2/memory/1444-24-0x0000000001010000-0x000000000175C000-memory.dmp	family_vidar_v7
behavioral2/memory/1444-44-0x0000000001010000-0x000000000175C000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	CUF.au3

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4616 set thread context of 3996	4616	Setup.exe	81

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
1444	CUF.au3

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	CUF.au3

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1688	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4616	Setup.exe
4616	Setup.exe
3996	more.com
3996	more.com
1444	CUF.au3
1444	CUF.au3

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
4616	Setup.exe
3996	more.com

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4616 wrote to memory of 3996	4616	Setup.exe	81
PID 4616 wrote to memory of 3996	4616	Setup.exe	81
PID 4616 wrote to memory of 3996	4616	Setup.exe	81
PID 4616 wrote to memory of 3996	4616	Setup.exe	81
PID 3996 wrote to memory of 1444	3996	more.com	83
PID 3996 wrote to memory of 1444	3996	more.com	83
PID 3996 wrote to memory of 1444	3996	more.com	83
PID 3996 wrote to memory of 1444	3996	more.com	83
PID 3996 wrote to memory of 1444	3996	more.com	83
PID 1444 wrote to memory of 3216	1444	CUF.au3	89
PID 1444 wrote to memory of 3216	1444	CUF.au3	89
PID 1444 wrote to memory of 3216	1444	CUF.au3	89
PID 3216 wrote to memory of 1688	3216	cmd.exe	91
PID 3216 wrote to memory of 1688	3216	cmd.exe	91
PID 3216 wrote to memory of 1688	3216	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:4616
- C:\Windows\SysWOW64\more.com
  C:\Windows\SysWOW64\more.com
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3996
- - C:\Users\Admin\AppData\Local\Temp\CUF.au3
    C:\Users\Admin\AppData\Local\Temp\CUF.au3
    3⤵
    - Checks computer location settings
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1444
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\CUF.au3" & rd /s /q "C:\ProgramData\CBGHCAKKFBGD" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3216
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 10
        5⤵
        Delays execution with timeout.exe
        
        PID:1688

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

Replay Monitor

Loading Replay Monitor...

Downloads

CUF.au3

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

Submit Download

ea820b29

Path C:\Users\Admin\AppData\Local\Temp\ea820b29
Size 6.8MB
SHA256 b04d1d45ebbc2973f0ccb272491c3329ce752a068f6128279e13569e96be4e44
MD5 1538f050e44a92fe2503fe241c2d9a8b
SHA1 6e0eb7237d13cd3395e0f77ac3bd4a89bc5b7f3f
SHA512 e05f63f7028f610700563cd8320c6e57185ce607f235ec3ba3f0ced9716f38478b06b5fb9a97ef54882fd172d1bfe3c56f903c5cf79a43848ee017cf5abdbdd8
SSDEEP 196608:axjIlWTdZm45vT6kcdW3urD0+Y6gagecJ+5:OjIlUdZm5zdW3urD7pggcC
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1444-23-0x00007FFD79D70000-0x00007FFD79F65000-memory.dmp

Download

memory/1444-21-0x0000000001010000-0x000000000175C000-memory.dmp

Download

memory/1444-44-0x0000000001010000-0x000000000175C000-memory.dmp

Download

memory/1444-26-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Download

memory/1444-24-0x0000000001010000-0x000000000175C000-memory.dmp

Download

memory/3996-19-0x0000000075560000-0x00000000756DB000-memory.dmp

Download

memory/3996-14-0x0000000075560000-0x00000000756DB000-memory.dmp

Download

memory/3996-12-0x0000000075560000-0x00000000756DB000-memory.dmp

Download

memory/3996-13-0x000000007556E000-0x0000000075570000-memory.dmp

Download

memory/3996-10-0x00007FFD79D70000-0x00007FFD79F65000-memory.dmp

Download

memory/4616-7-0x00007FFD6B670000-0x00007FFD6B7E2000-memory.dmp

Download

memory/4616-5-0x00007FFD6B688000-0x00007FFD6B689000-memory.dmp

Download

memory/4616-0-0x00007FFD6B670000-0x00007FFD6B7E2000-memory.dmp

Download

memory/4616-6-0x00007FFD6B670000-0x00007FFD6B7E2000-memory.dmp

Download