stealc | df6c90984fb8ff5d00e91148c3d6c0884803eab382f43349d735aaf8fa10069d

Analysis

max time kernel
147s
max time network
151s
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, 13:00

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General

Target
!#Fileş_#!UŞe~Passw0rd__~.~140615~.~__/Setup.exe
Size 316KB
Sample240615-p85ams1fph
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 3 IoCs

stealer

resource	yara_rule
behavioral2/memory/1824-22-0x0000000001400000-0x0000000001B4C000-memory.dmp	family_vidar_v7
behavioral2/memory/1824-25-0x0000000001400000-0x0000000001B4C000-memory.dmp	family_vidar_v7
behavioral2/memory/1824-39-0x0000000001400000-0x0000000001B4C000-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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	coml.au3

Loads dropped DLL 1 IoCs

pid	Process
1824	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 3792 set thread context of 1716	3792	Setup.exe	84

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
2604	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3792	Setup.exe
3792	Setup.exe
1716	netsh.exe
1716	netsh.exe
1824	coml.au3
1824	coml.au3

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
3792	Setup.exe
1716	netsh.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3792 wrote to memory of 1716	3792	Setup.exe	84
PID 3792 wrote to memory of 1716	3792	Setup.exe	84
PID 3792 wrote to memory of 1716	3792	Setup.exe	84
PID 3792 wrote to memory of 1716	3792	Setup.exe	84
PID 1716 wrote to memory of 1824	1716	netsh.exe	86
PID 1716 wrote to memory of 1824	1716	netsh.exe	86
PID 1716 wrote to memory of 1824	1716	netsh.exe	86
PID 1716 wrote to memory of 1824	1716	netsh.exe	86
PID 1716 wrote to memory of 1824	1716	netsh.exe	86
PID 1824 wrote to memory of 2332	1824	coml.au3	89
PID 1824 wrote to memory of 2332	1824	coml.au3	89
PID 1824 wrote to memory of 2332	1824	coml.au3	89
PID 2332 wrote to memory of 2604	2332	cmd.exe	91
PID 2332 wrote to memory of 2604	2332	cmd.exe	91
PID 2332 wrote to memory of 2604	2332	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\!#Fileş_#!UŞe~Passw0rd__~.~140615~.~__\Setup.exe
"C:\Users\Admin\AppData\Local\Temp\!#Fileş_#!UŞe~Passw0rd__~.~140615~.~__\Setup.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3792
- C:\Windows\SysWOW64\netsh.exe
  C:\Windows\SysWOW64\netsh.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1716
- - 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:1824
  - - 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\DAFBGHCAKKFC" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2332
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 10
        5⤵
        Delays execution with timeout.exe
        
        PID:2604

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

b043ffae

Path C:\Users\Admin\AppData\Local\Temp\b043ffae
Size 6.8MB
SHA256 1af9e4f53e8ef2773ad92ac943296d2d4034222b30082ceb80a37bcc1d582ca7
MD5 04acf5774799e6fdb55f76891acb12f9
SHA1 ad13be189ac4eb23daea29eb4ee113776565768b
SHA512 3d218c172ad4043e5e6138456f26ae03dad3d1b171f602f53de5f92b605213982ee7e9cca279c22747fca114f6c908f4815aa693b3ad04faee59b54dc7a7866e
SSDEEP 98304:g+8zkUBIha69ZCDe/yncJ83x5Vv0rmZP6+nYtT4P01shQJ:gvz+vCDe/Qo8vWO69BVshQ
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/1716-16-0x00007FFF7C9B0000-0x00007FFF7CBA5000-memory.dmp

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memory/1824-22-0x0000000001400000-0x0000000001B4C000-memory.dmp

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memory/1824-24-0x00007FFF7C9B0000-0x00007FFF7CBA5000-memory.dmp

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memory/1824-25-0x0000000001400000-0x0000000001B4C000-memory.dmp

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memory/1824-27-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/1824-39-0x0000000001400000-0x0000000001B4C000-memory.dmp

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memory/3792-0-0x00007FFF5D7D0000-0x00007FFF5D942000-memory.dmp

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memory/3792-11-0x00007FFF5D7E8000-0x00007FFF5D7E9000-memory.dmp

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memory/3792-12-0x00007FFF5D7D0000-0x00007FFF5D942000-memory.dmp

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memory/3792-13-0x00007FFF5D7D0000-0x00007FFF5D942000-memory.dmp

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