stealc | 5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd

Analysis

max time kernel
142s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 01:32

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General

Target

5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe
Size

2.1MB
MD5

e944a0bbd2b4eacf1c70e969db2f600a
SHA1

1e3cc585110b19c62bda4dc3f76dc1ffa14f3775
SHA256

5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd
SHA512

fa0488fc8bdfc2cf22eca3170b1806c2caba933e396647a2ffc4728d14a620d3851393f4f0b5157daa5f9de864dda06192f75d952d0b8d41af04b299f7da7cca
SSDEEP

49152:N6uDuaS9refuYJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9DYtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/2620-1-0x0000000004170000-0x00000000042B9000-memory.dmp	family_vidar_v7
behavioral2/memory/3236-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3236-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3236-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3236-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3236-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3236-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3236-33-0x0000000000400000-0x0000000000646000-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. 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3236-14-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3236-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3236-32-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs
behavioral2/memory/3236-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3236-14-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3236-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3236-32-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs
behavioral2/memory/3236-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects Windows executables referencing non-Windows User-Agents 7 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3236-4-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3236-8-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3236-10-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3236-14-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3236-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3236-32-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3236-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3236-14-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3236-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3236-32-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral2/memory/3236-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 7 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3236-4-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3236-8-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3236-10-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3236-14-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3236-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3236-32-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/3236-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

Detects executables containing potential Windows Defender anti-emulation checks 7 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3236-4-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3236-8-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3236-10-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3236-14-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3236-15-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3236-32-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/3236-33-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation

Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

kat22F4.tmp

pid process

3236 kat22F4.tmp
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
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

pid	process
3236	kat22F4.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe

description	pid	process	target process
PID 2620 set thread context of 3236	2620	5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe	kat22F4.tmp

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:

kat22F4.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat22F4.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat22F4.tmp

pid process

3236 kat22F4.tmp
3236 kat22F4.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat22F4.tmp

pid	process
3236	kat22F4.tmp
3236	kat22F4.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe

description	pid	process	target process
PID 2620 wrote to memory of 3236	2620	5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe	kat22F4.tmp
PID 2620 wrote to memory of 3236	2620	5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe	kat22F4.tmp
PID 2620 wrote to memory of 3236	2620	5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe	kat22F4.tmp
PID 2620 wrote to memory of 3236	2620	5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe	kat22F4.tmp
PID 2620 wrote to memory of 3236	2620	5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe	kat22F4.tmp
PID 2620 wrote to memory of 3236	2620	5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe	kat22F4.tmp
PID 2620 wrote to memory of 3236	2620	5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe	kat22F4.tmp
PID 2620 wrote to memory of 3236	2620	5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe	kat22F4.tmp

C:\Users\Admin\AppData\Local\Temp\5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe
"C:\Users\Admin\AppData\Local\Temp\5d2153603e4b44738ce55836b93d9b8a6676dcb4b9acbef9a4e0a8d3b38d3abd.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2620

C:\Users\Admin\AppData\Local\Temp\kat22F4.tmp
C:\Users\Admin\AppData\Local\Temp\kat22F4.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3236

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1324 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8
1⤵
PID:2316

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\kat22F4.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2620-0-0x00000000024B0000-0x00000000024B1000-memory.dmp

Filesize
4KB

Download
memory/2620-1-0x0000000004170000-0x00000000042B9000-memory.dmp

Filesize
1.3MB

Download
memory/2620-9-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download
memory/3236-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3236-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3236-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3236-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3236-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3236-17-0x000000001B770000-0x000000001B9CF000-memory.dmp

Filesize
2.4MB

Download
memory/3236-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3236-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download