stealc | 12ca25e6461fd5a1178fdc0a4b23cfa88225dec174fbd48ff6587a50b24d5a38

Analysis

max time kernel
52s
max time network
56s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
16/06/2024, 01:01

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General

Target
#)#NEw_SetUp_33778_P@$$Key#(#/New-Setup.exe
Size 316KB
Sample240616-bdhlhaseng
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/720-23-0x0000000000C00000-0x000000000134B000-memory.dmp	family_vidar_v7
behavioral2/memory/720-25-0x0000000000C00000-0x000000000134B000-memory.dmp	family_vidar_v7
behavioral2/memory/720-39-0x0000000000C00000-0x000000000134B000-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

Detects Windows executables referencing non-Windows User-Agents 3 IoCs

resource	yara_rule
behavioral2/memory/720-23-0x0000000000C00000-0x000000000134B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/720-25-0x0000000000C00000-0x000000000134B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/720-39-0x0000000000C00000-0x000000000134B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 3 IoCs

resource	yara_rule
behavioral2/memory/720-23-0x0000000000C00000-0x000000000134B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/720-25-0x0000000000C00000-0x000000000134B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/720-39-0x0000000000C00000-0x000000000134B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

Detects executables containing potential Windows Defender anti-emulation checks 3 IoCs

resource	yara_rule
behavioral2/memory/720-23-0x0000000000C00000-0x000000000134B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/720-25-0x0000000000C00000-0x000000000134B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/720-39-0x0000000000C00000-0x000000000134B000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation

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
720	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 2392 set thread context of 1524	2392	New-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
3044	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2392	New-Setup.exe
2392	New-Setup.exe
1524	netsh.exe
1524	netsh.exe
720	coml.au3
720	coml.au3

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2392	New-Setup.exe
1524	netsh.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2392 wrote to memory of 1524	2392	New-Setup.exe	84
PID 2392 wrote to memory of 1524	2392	New-Setup.exe	84
PID 2392 wrote to memory of 1524	2392	New-Setup.exe	84
PID 2392 wrote to memory of 1524	2392	New-Setup.exe	84
PID 1524 wrote to memory of 720	1524	netsh.exe	86
PID 1524 wrote to memory of 720	1524	netsh.exe	86
PID 1524 wrote to memory of 720	1524	netsh.exe	86
PID 1524 wrote to memory of 720	1524	netsh.exe	86
PID 1524 wrote to memory of 720	1524	netsh.exe	86
PID 720 wrote to memory of 5116	720	coml.au3	89
PID 720 wrote to memory of 5116	720	coml.au3	89
PID 720 wrote to memory of 5116	720	coml.au3	89
PID 5116 wrote to memory of 3044	5116	cmd.exe	91
PID 5116 wrote to memory of 3044	5116	cmd.exe	91
PID 5116 wrote to memory of 3044	5116	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\#)#NEw_SetUp_33778_P@$$Key#(#\New-Setup.exe
"C:\Users\Admin\AppData\Local\Temp\#)#NEw_SetUp_33778_P@$$Key#(#\New-Setup.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Windows\SysWOW64\netsh.exe
  C:\Windows\SysWOW64\netsh.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1524
- - 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:720
  - - 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\IDAKJKEHDBGH" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5116
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 10
        5⤵
        Delays execution with timeout.exe
        
        PID:3044

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

b38e5bf6

Path C:\Users\Admin\AppData\Local\Temp\b38e5bf6
Size 6.8MB
SHA256 007564f75f0e01ea3945200c9bd5fb63e6e7d45ea7c80657a012ebeaee675175
MD5 d042200e9b33a95d48e1638938e8c126
SHA1 60c4ab9e134eb6898b343d420a570feaf27c211a
SHA512 812bf8a17345742504e8b210b1445d8efd04af3fa0a3bc526139923873f9ad9c65c6919c9f7853e39ef4230985d4b520b5cb9509c515b34d96732fbef3437315
SSDEEP 98304:F+5iB4zcoxxMvD4QTPDMSSg206vTZzUPiCYgJGVDU/d34JUqn9UbvocqxLy0:FnB44o3Mb4S206vTZ40VDU/d34n9QqBp
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/720-23-0x0000000000C00000-0x000000000134B000-memory.dmp

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memory/720-24-0x00007FF8CD270000-0x00007FF8CD465000-memory.dmp

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memory/720-25-0x0000000000C00000-0x000000000134B000-memory.dmp

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memory/720-27-0x0000000061E00000-0x0000000061EF3000-memory.dmp

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memory/720-39-0x0000000000C00000-0x000000000134B000-memory.dmp

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memory/1524-16-0x00007FF8CD270000-0x00007FF8CD465000-memory.dmp

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memory/2392-0-0x00007FF8ADEB0000-0x00007FF8AE022000-memory.dmp

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memory/2392-11-0x00007FF8ADEC8000-0x00007FF8ADEC9000-memory.dmp

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memory/2392-12-0x00007FF8ADEB0000-0x00007FF8AE022000-memory.dmp

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memory/2392-13-0x00007FF8ADEB0000-0x00007FF8AE022000-memory.dmp

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