stealc | 0c5787229f775fcbdd5d466b411c628480c0a0b655b1f7705b90448296916112

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
17/06/2024, 15:57

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General

Target
!#File?_#!U?e~Passw0rd__~.~160617~.~__/Setup.exe
Size 316KB
Sample240617-tedm2szbpm
SHA256 111c56593668be63e1e0c79a2d33d9e2d49cdf0c5100663c72045bc6b76e9fe6
MD5 c637e5ecf625b72f4bef9d28cd81d612
SHA1 a2c1329d290e508ee9fd0eb81e7f25d57e450f8c
SHA512 727d78bab4fab3674eec92ca5f07df6a0095ab3b973dd227c599c70e8493592bb53bb9208cc6270713283ef0065acfad3203ddcf4dcb6d43f8727f09ceaaf2e4
SSDEEP 6144:VzsRSKkhKKXDD2mTLGxelHJ+SBae3VFpSX:6VkhZWEGxelH0SBtfpS
MD5 SHA1 SHA512 SSDEEP

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
behavioral2/memory/1868-25-0x0000000001600000-0x0000000001D4C000-memory.dmp	family_vidar_v7
behavioral2/memory/1868-40-0x0000000001600000-0x0000000001D4C000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	coml.au3

Loads dropped DLL 1 IoCs

pid	Process
1868	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 2384 set thread context of 3308	2384	Setup.exe	79

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
3356	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2384	Setup.exe
2384	Setup.exe
3308	netsh.exe
3308	netsh.exe
1868	coml.au3
1868	coml.au3

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2384	Setup.exe
3308	netsh.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 3308	2384	Setup.exe	79
PID 2384 wrote to memory of 3308	2384	Setup.exe	79
PID 2384 wrote to memory of 3308	2384	Setup.exe	79
PID 2384 wrote to memory of 3308	2384	Setup.exe	79
PID 3308 wrote to memory of 1868	3308	netsh.exe	81
PID 3308 wrote to memory of 1868	3308	netsh.exe	81
PID 3308 wrote to memory of 1868	3308	netsh.exe	81
PID 3308 wrote to memory of 1868	3308	netsh.exe	81
PID 3308 wrote to memory of 1868	3308	netsh.exe	81
PID 1868 wrote to memory of 2636	1868	coml.au3	83
PID 1868 wrote to memory of 2636	1868	coml.au3	83
PID 1868 wrote to memory of 2636	1868	coml.au3	83
PID 2636 wrote to memory of 3356	2636	cmd.exe	85
PID 2636 wrote to memory of 3356	2636	cmd.exe	85
PID 2636 wrote to memory of 3356	2636	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\!#File__#!U_e~Passw0rd__~.~160617~.~__\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\!#File__#!U_e~Passw0rd__~.~160617~.~__\Setup.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Windows\SysWOW64\netsh.exe
  C:\Windows\SysWOW64\netsh.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3308
- - 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:1868
  - - 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\JJEGCBGIDHCA" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2636
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 10
        5⤵
        Delays execution with timeout.exe
        
        PID:3356

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

c85b19ed

Path C:\Users\Admin\AppData\Local\Temp\c85b19ed
Size 6.8MB
SHA256 5957f61fc362b91968e72f94c3c76ef336fc22f8234d7acdee00bb16663ef4a0
MD5 09f02b93e1c4765350e13b80ebc15de7
SHA1 19e2aa3cda7f90861f193963870d46ac7470a954
SHA512 0fb9240090cefca5d7603f9a0154cb369b8f551a119b8df911ead006cd76df76ac8423a6fa61dcd5d3f391fdb2781d1a6d1924f3749d511c7f785da321bd5f2a
SSDEEP 196608:JxjhlWPB5fAwRuG6WmWLx7vRe5fWP2Uwz:LjhlMJRuGPJ9Re5+P2Vz
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/1868-40-0x0000000001600000-0x0000000001D4C000-memory.dmp

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memory/1868-28-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/1868-27-0x00007FFD24B90000-0x00007FFD24D85000-memory.dmp

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memory/1868-25-0x0000000001600000-0x0000000001D4C000-memory.dmp

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memory/2384-13-0x00007FFD060F0000-0x00007FFD06262000-memory.dmp

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memory/2384-0-0x00007FFD060F0000-0x00007FFD06262000-memory.dmp

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memory/2384-12-0x00007FFD060F0000-0x00007FFD06262000-memory.dmp

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memory/2384-11-0x00007FFD06108000-0x00007FFD06109000-memory.dmp

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memory/3308-20-0x0000000073EC1000-0x0000000073ECF000-memory.dmp

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memory/3308-23-0x0000000073EC1000-0x0000000073ECF000-memory.dmp

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memory/3308-19-0x0000000073ECE000-0x0000000073ED0000-memory.dmp

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memory/3308-16-0x00007FFD24B90000-0x00007FFD24D85000-memory.dmp

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