stealc | 25cbba8cb4b96c8b9e6c8490c2460eb8fecb3b6dd4eb8fc2a06392cb018dda5b

Analysis

max time kernel
90s
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
15/06/2024, 01:16

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General

Target

##!!SetUp_5566_Pa$sW0rd$$!!/Setup.exe
Size

5.4MB
MD5

ad2735f096925010a53450cb4178c89e
SHA1

c6d65163c6315a642664f4eaec0fae9528549bfe
SHA256

4e775b5fafb4e6d89a4694f8694d2b8b540534bd4a52ff42f70095f1c929160e
SHA512

1868b22a7c5cba89545b06f010c09c5418b3d86039099d681eee9567c47208fdba3b89c6251cf03c964c58c805280d45ba9c3533125f6bd3e0bc067477e03ab9
SSDEEP

98304:o/zx+riUDpJowboU+XEsumY2XW6jBYeZ1ER:2x+riUDwUj12X1tY5

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/3164-26-0x0000000000ED0000-0x000000000161C000-memory.dmp	family_vidar_v7
behavioral6/memory/3164-29-0x0000000000ED0000-0x000000000161C000-memory.dmp	family_vidar_v7
behavioral6/memory/3164-43-0x0000000000ED0000-0x000000000161C000-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
behavioral6/memory/3164-26-0x0000000000ED0000-0x000000000161C000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral6/memory/3164-29-0x0000000000ED0000-0x000000000161C000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral6/memory/3164-43-0x0000000000ED0000-0x000000000161C000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

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

resource	yara_rule
behavioral6/memory/3164-26-0x0000000000ED0000-0x000000000161C000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral6/memory/3164-29-0x0000000000ED0000-0x000000000161C000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral6/memory/3164-43-0x0000000000ED0000-0x000000000161C000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

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

resource	yara_rule
behavioral6/memory/3164-26-0x0000000000ED0000-0x000000000161C000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral6/memory/3164-29-0x0000000000ED0000-0x000000000161C000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral6/memory/3164-43-0x0000000000ED0000-0x000000000161C000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	coml.au3

Loads dropped DLL 1 IoCs

pid	Process
3164	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 3288 set thread context of 2096	3288	Setup.exe	85

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
1804	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3288	Setup.exe
3288	Setup.exe
2096	netsh.exe
2096	netsh.exe
3164	coml.au3
3164	coml.au3

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
3288	Setup.exe
2096	netsh.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3288 wrote to memory of 2096	3288	Setup.exe	85
PID 3288 wrote to memory of 2096	3288	Setup.exe	85
PID 3288 wrote to memory of 2096	3288	Setup.exe	85
PID 3288 wrote to memory of 2096	3288	Setup.exe	85
PID 2096 wrote to memory of 3164	2096	netsh.exe	87
PID 2096 wrote to memory of 3164	2096	netsh.exe	87
PID 2096 wrote to memory of 3164	2096	netsh.exe	87
PID 2096 wrote to memory of 3164	2096	netsh.exe	87
PID 2096 wrote to memory of 3164	2096	netsh.exe	87
PID 3164 wrote to memory of 1952	3164	coml.au3	90
PID 3164 wrote to memory of 1952	3164	coml.au3	90
PID 3164 wrote to memory of 1952	3164	coml.au3	90
PID 1952 wrote to memory of 1804	1952	cmd.exe	94
PID 1952 wrote to memory of 1804	1952	cmd.exe	94
PID 1952 wrote to memory of 1804	1952	cmd.exe	94

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:3288
- C:\Windows\SysWOW64\netsh.exe
  C:\Windows\SysWOW64\netsh.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2096
- - 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:3164
  - - 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\DGIJEGHDAECA" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1952
    - - C:\Windows\SysWOW64\timeout.exe
        
        timeout /t 10
        5⤵
        Delays execution with timeout.exe
        
        PID:1804

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

C:\Users\Admin\AppData\Local\Temp\c02fa9c8

Filesize
6.8MB

MD5
0fe42443907005df9867dd37536a4e6c

SHA1
4376698a223bf72d5988648552ce316ca81d194a

SHA256
586610bd6d117fa30bb08bcaf91fc5a0b98f89ced776d600c56a5bd02101ff94

SHA512
d22edf65277e53fec3866a7ded97d5ba31e88663831d543e337cdcc523571d6f3abd506c70bb0268791e2de09930cdd0a481d2c5e86c69b2c46a9b869cc13dbb

Download Submit
C:\Users\Admin\AppData\Local\Temp\coml.au3

Filesize
872KB

MD5
c56b5f0201a3b3de53e561fe76912bfd

SHA1
2a4062e10a5de813f5688221dbeb3f3ff33eb417

SHA256
237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

SHA512
195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

Download Submit
memory/2096-20-0x0000000073EEE000-0x0000000073EF0000-memory.dmp

Filesize
8KB

Download
memory/2096-17-0x00007FFA14610000-0x00007FFA14805000-memory.dmp

Filesize
2.0MB

Download
memory/2096-21-0x0000000073EE1000-0x0000000073EEF000-memory.dmp

Filesize
56KB

Download
memory/2096-24-0x0000000073EE1000-0x0000000073EEF000-memory.dmp

Filesize
56KB

Download
memory/3164-26-0x0000000000ED0000-0x000000000161C000-memory.dmp

Filesize
7.3MB

Download
memory/3164-28-0x00007FFA14610000-0x00007FFA14805000-memory.dmp

Filesize
2.0MB

Download
memory/3164-29-0x0000000000ED0000-0x000000000161C000-memory.dmp

Filesize
7.3MB

Download
memory/3164-31-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3164-43-0x0000000000ED0000-0x000000000161C000-memory.dmp

Filesize
7.3MB

Download
memory/3288-14-0x00007FF9F6060000-0x00007FF9F61D2000-memory.dmp

Filesize
1.4MB

Download
memory/3288-13-0x00007FF9F6060000-0x00007FF9F61D2000-memory.dmp

Filesize
1.4MB

Download
memory/3288-0-0x00007FF9F6060000-0x00007FF9F61D2000-memory.dmp

Filesize
1.4MB

Download
memory/3288-12-0x00007FF9F6078000-0x00007FF9F6079000-memory.dmp

Filesize
4KB

Download