stealc | 25cbba8cb4b96c8b9e6c8490c2460eb8fecb3b6dd4eb8fc2a06392cb018dda5b

Analysis

max time kernel
51s
max time network
53s
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, 12:20

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General

Target
##!!SetUp_5566_Pa$sW0rd$$!!/Setup.exe
Size 5.4MB
Sample240615-ph937stgrn
SHA256 4e775b5fafb4e6d89a4694f8694d2b8b540534bd4a52ff42f70095f1c929160e
MD5 ad2735f096925010a53450cb4178c89e
SHA1 c6d65163c6315a642664f4eaec0fae9528549bfe
SHA512 1868b22a7c5cba89545b06f010c09c5418b3d86039099d681eee9567c47208fdba3b89c6251cf03c964c58c805280d45ba9c3533125f6bd3e0bc067477e03ab9
SSDEEP 98304:o/zx+riUDpJowboU+XEsumY2XW6jBYeZ1ER:2x+riUDwUj12X1tY5
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
behavioral6/memory/2648-26-0x0000000001200000-0x000000000194C000-memory.dmp	family_vidar_v7
behavioral6/memory/2648-29-0x0000000001200000-0x000000000194C000-memory.dmp	family_vidar_v7
behavioral6/memory/2648-43-0x0000000001200000-0x000000000194C000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	coml.au3

Loads dropped DLL 1 IoCs

pid	Process
2648	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 3800 set thread context of 4500	3800	Setup.exe	80

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
4852	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3800	Setup.exe
3800	Setup.exe
4500	netsh.exe
4500	netsh.exe
2648	coml.au3
2648	coml.au3

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
3800	Setup.exe
4500	netsh.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3800 wrote to memory of 4500	3800	Setup.exe	80
PID 3800 wrote to memory of 4500	3800	Setup.exe	80
PID 3800 wrote to memory of 4500	3800	Setup.exe	80
PID 3800 wrote to memory of 4500	3800	Setup.exe	80
PID 4500 wrote to memory of 2648	4500	netsh.exe	82
PID 4500 wrote to memory of 2648	4500	netsh.exe	82
PID 4500 wrote to memory of 2648	4500	netsh.exe	82
PID 4500 wrote to memory of 2648	4500	netsh.exe	82
PID 4500 wrote to memory of 2648	4500	netsh.exe	82
PID 2648 wrote to memory of 3816	2648	coml.au3	85
PID 2648 wrote to memory of 3816	2648	coml.au3	85
PID 2648 wrote to memory of 3816	2648	coml.au3	85
PID 3816 wrote to memory of 4852	3816	cmd.exe	87
PID 3816 wrote to memory of 4852	3816	cmd.exe	87
PID 3816 wrote to memory of 4852	3816	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\##!!SetUp_5566_Pa$sW0rd$$!!\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\##!!SetUp_5566_Pa$sW0rd$$!!\Setup.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3800
- C:\Windows\SysWOW64\netsh.exe
  C:\Windows\SysWOW64\netsh.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4500
- - 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:2648
  - - 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\FBFCGIDAKECG" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3816
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 10
        5⤵
        Delays execution with timeout.exe
        
        PID:4852

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

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Downloads

9d2c6a01

Path C:\Users\Admin\AppData\Local\Temp\9d2c6a01
Size 6.8MB
SHA256 603afc4082483bd3ec76b676b148853e475211eaab86aac106b485266639c6fb
MD5 748b9cd0bd79ceb7c94c6119262ff0c6
SHA1 ffa70c183aafdcd95515bcf040375d717a473ded
SHA512 862f7834673c1f7b5c1a52cbc4026713e62642afee1f7f4b43b014239c1ede25a57d96f6aeb1963a76b9ee450e92b4c3b969491778377c4fe5a8b7abf042de4a
SSDEEP 196608:GaKiVf07Puv5J1jDsC1OZewhDeAQkGDOLzkttrtIIe4ztS3:GaVf07y5TXZOneWEttZzU3
MD5 SHA1 SHA512 SSDEEP

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coml.au3

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

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memory/2648-43-0x0000000001200000-0x000000000194C000-memory.dmp

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memory/2648-31-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/2648-29-0x0000000001200000-0x000000000194C000-memory.dmp

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memory/2648-28-0x00007FFA217B0000-0x00007FFA219A5000-memory.dmp

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memory/2648-26-0x0000000001200000-0x000000000194C000-memory.dmp

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memory/3800-14-0x00007FFA12420000-0x00007FFA12592000-memory.dmp

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memory/3800-0-0x00007FFA12420000-0x00007FFA12592000-memory.dmp

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memory/3800-13-0x00007FFA12420000-0x00007FFA12592000-memory.dmp

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memory/3800-12-0x00007FFA12438000-0x00007FFA12439000-memory.dmp

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memory/4500-24-0x0000000074031000-0x000000007403F000-memory.dmp

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memory/4500-19-0x000000007403E000-0x0000000074040000-memory.dmp

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memory/4500-20-0x0000000074031000-0x000000007403F000-memory.dmp

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memory/4500-17-0x00007FFA217B0000-0x00007FFA219A5000-memory.dmp

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