stealc | 132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
25-05-2024 01:05

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General

Target

132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe
Size

1.9MB
MD5

539811c87f4654f1665e9a49c5457066
SHA1

f7b825496b715d84c2e87d8b60ebcf7505b6cd4c
SHA256

132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0
SHA512

a654a2554828998ffd91fd60288fcf740813e129b2b375a42eaad049cd5bc7868a755e120a5b195f578eac9adde463f5c5b926e8f89a69122f697bb73e199e4d
SSDEEP

49152:/fZTmjlVqD/zL8EDMGWUt9PZWQKzw65ZkzQuKAW1Db96jIt6:/xy3qD/zL8HUt9Ygq6MukPh

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 9 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/3060-9-0x0000000000400000-0x000000000089E000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-18-0x0000000000400000-0x000000000089E000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-19-0x0000000000400000-0x000000000089E000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-34-0x0000000000400000-0x000000000089E000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-35-0x0000000000400000-0x000000000089E000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-49-0x0000000000400000-0x000000000089E000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-50-0x0000000000400000-0x000000000089E000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-64-0x0000000000400000-0x000000000089E000-memory.dmp	family_vidar_v7
behavioral2/memory/3060-65-0x0000000000400000-0x000000000089E000-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/3060-18-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3060-19-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3060-34-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3060-35-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3060-49-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3060-50-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3060-64-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3060-65-0x0000000000400000-0x000000000089E000-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/3060-18-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3060-19-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3060-34-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3060-35-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3060-49-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3060-50-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3060-64-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3060-65-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects Windows executables referencing non-Windows User-Agents 9 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3060-9-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3060-18-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3060-19-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3060-34-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3060-35-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3060-49-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3060-50-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3060-64-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3060-65-0x0000000000400000-0x000000000089E000-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/3060-18-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3060-19-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3060-34-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3060-35-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3060-49-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3060-50-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3060-64-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3060-65-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 9 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3060-9-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3060-18-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3060-19-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3060-34-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3060-35-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3060-49-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3060-50-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3060-64-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3060-65-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

Detects executables containing potential Windows Defender anti-emulation checks 9 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3060-9-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3060-18-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3060-19-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3060-34-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3060-35-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3060-49-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3060-50-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3060-64-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3060-65-0x0000000000400000-0x000000000089E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation

Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

RegAsm.execmd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	RegAsm.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	cmd.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

Suspicious use of SetThreadContext 1 IoCs

Processes:

132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe

description	pid	process	target process
PID 116 set thread context of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.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

2852 timeout.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RegAsm.exe

pid process

3060 RegAsm.exe
3060 RegAsm.exe

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

pid	process
2852	timeout.exe

pid	process
3060	RegAsm.exe
3060	RegAsm.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exeRegAsm.execmd.exe

description	pid	process	target process
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 116 wrote to memory of 3060	116	132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe	RegAsm.exe
PID 3060 wrote to memory of 4384	3060	RegAsm.exe	cmd.exe
PID 3060 wrote to memory of 4384	3060	RegAsm.exe	cmd.exe
PID 3060 wrote to memory of 4384	3060	RegAsm.exe	cmd.exe
PID 3060 wrote to memory of 1660	3060	RegAsm.exe	cmd.exe
PID 3060 wrote to memory of 1660	3060	RegAsm.exe	cmd.exe
PID 3060 wrote to memory of 1660	3060	RegAsm.exe	cmd.exe
PID 1660 wrote to memory of 2852	1660	cmd.exe	timeout.exe
PID 1660 wrote to memory of 2852	1660	cmd.exe	timeout.exe
PID 1660 wrote to memory of 2852	1660	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe
"C:\Users\Admin\AppData\Local\Temp\132289704de81e5014306f192b09c97c0252ce3fcc72d981779085e7b9a61cd0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:116

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:3060

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c start "" "C:\ProgramData\JDHCBAEHJJ.exe"
3⤵
- Checks computer location settings
PID:4384

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\IJKKKFCFHCFI" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1660

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:2852

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/116-0-0x0000000000760000-0x0000000000761000-memory.dmp

Filesize
4KB

Download
memory/116-1-0x0000000000760000-0x0000000000761000-memory.dmp

Filesize
4KB

Download
memory/116-3-0x0000000000760000-0x0000000000761000-memory.dmp

Filesize
4KB

Download
memory/3060-2-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-5-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-8-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-9-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-18-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-19-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-21-0x000000001B8C0000-0x000000001BB1F000-memory.dmp

Filesize
2.4MB

Download
memory/3060-34-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-35-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-49-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-50-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-64-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download
memory/3060-65-0x0000000000400000-0x000000000089E000-memory.dmp

Filesize
4.6MB

Download