stealc | 0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74

Analysis

max time kernel
129s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 01:04

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General

Target

0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe
Size

355KB
MD5

f4fb6b518e2e550467f533124e1f80f4
SHA1

964e735dd9410e07536e46b9f50c65fed148bcd7
SHA256

0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74
SHA512

4a02aa8aa87dab5d6aa14da695f71aa424b95bc4437c3b8353ac355e0a73f68ded2df49e6e2ca8af6e9389745861a78a7343ab4838a6584a1108e18525d5984a
SSDEEP

6144:+vFPlgMF6peZUqbWFROY1NiXKvtuTx5qPmOGDe+VNfyhr24L25rQXxSXQMR23M:+9PlgMFgxy2u15emOqVNL4LQriM

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 11 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/3132-1-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-6-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-33-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-50-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-51-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-62-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-63-0x0000000000400000-0x0000000000646000-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

Detect binaries embedding considerable number of MFA browser extension IDs. 8 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3132-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3132-16-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3132-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3132-34-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3132-50-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3132-51-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3132-62-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3132-63-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 8 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3132-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3132-16-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3132-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3132-34-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3132-50-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3132-51-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3132-62-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3132-63-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects Windows executables referencing non-Windows User-Agents 11 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3132-1-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3132-6-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3132-4-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3132-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3132-16-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3132-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3132-34-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3132-50-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3132-51-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3132-62-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3132-63-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 8 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3132-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3132-16-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3132-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3132-34-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3132-50-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3132-51-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3132-62-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3132-63-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 11 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3132-1-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3132-6-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3132-4-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3132-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3132-16-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3132-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3132-34-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3132-50-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3132-51-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3132-62-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3132-63-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

Detects executables containing potential Windows Defender anti-emulation checks 11 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3132-1-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3132-6-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3132-4-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3132-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3132-16-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3132-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3132-34-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3132-50-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3132-51-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3132-62-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3132-63-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation

Downloads MZ/PE file
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

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation RegAsm.exe
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
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe

description	pid	process	target process
PID 372 set thread context of 3132	372	0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe	RegAsm.exe

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

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString RegAsm.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4384 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

RegAsm.exe

pid process

3132 RegAsm.exe
3132 RegAsm.exe
3132 RegAsm.exe
3132 RegAsm.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe

pid	process
4384	timeout.exe

pid	process
3132	RegAsm.exe
3132	RegAsm.exe
3132	RegAsm.exe
3132	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exeRegAsm.execmd.exe

description	pid	process	target process
PID 372 wrote to memory of 3132	372	0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe	RegAsm.exe
PID 372 wrote to memory of 3132	372	0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe	RegAsm.exe
PID 372 wrote to memory of 3132	372	0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe	RegAsm.exe
PID 372 wrote to memory of 3132	372	0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe	RegAsm.exe
PID 372 wrote to memory of 3132	372	0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe	RegAsm.exe
PID 372 wrote to memory of 3132	372	0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe	RegAsm.exe
PID 372 wrote to memory of 3132	372	0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe	RegAsm.exe
PID 372 wrote to memory of 3132	372	0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe	RegAsm.exe
PID 372 wrote to memory of 3132	372	0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe	RegAsm.exe
PID 3132 wrote to memory of 3940	3132	RegAsm.exe	cmd.exe
PID 3132 wrote to memory of 3940	3132	RegAsm.exe	cmd.exe
PID 3132 wrote to memory of 3940	3132	RegAsm.exe	cmd.exe
PID 3940 wrote to memory of 4384	3940	cmd.exe	timeout.exe
PID 3940 wrote to memory of 4384	3940	cmd.exe	timeout.exe
PID 3940 wrote to memory of 4384	3940	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe
"C:\Users\Admin\AppData\Local\Temp\0a456f0fee171826bb44c9c2e1d5e7b95c0862b67d9dd75a843dec035224bb74.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:372

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Checks computer location settings
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3132

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\CFCBFBGDBKJK" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:3940

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:4384

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/372-0-0x0000000000C20000-0x0000000000C21000-memory.dmp

Filesize
4KB

Download
memory/372-2-0x0000000000C20000-0x0000000000C21000-memory.dmp

Filesize
4KB

Download
memory/3132-1-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-6-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-18-0x000000001B770000-0x000000001B9CF000-memory.dmp

Filesize
2.4MB

Download
memory/3132-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-50-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-51-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-62-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-63-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download