stealc | e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
11/06/2024, 04:17

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General

Target
e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe
Size 1.7MB
Sample240611-ewjs3atfma
SHA256 e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa
MD5 1b5351df366ce3b5833d0f0737c8c8d8
SHA1 ed3624ba0e72870d501d6c2e87fb3dc227e15d90
SHA512 b7af413bab10d5d0fb153f7909db620ea75d1c560075d249314675b98b42d417bc8508cd7c31ef37dd781c06bed9ac8a6f055ed5ab87ec5d9b81c1d914cbf2bd
SSDEEP 24576:JoZYQkmdrf+kUfMxVVtes12FxwojKr98YGeGG9iH:JPYxJUkxVVChjHZQsH
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

https://t.me/r8z0l
https://steamcommunity.com/profiles/76561199698764354

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

resource	yara_rule
behavioral2/memory/1692-1-0x0000000003FA0000-0x00000000040B0000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3336-17-0x0000000000400000-0x0000000000648000-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

Executes dropped EXE 1 IoCs

pid	Process
3336	kat7AED.tmp

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 1692 set thread context of 3336	1692	e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe	78

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	kat7AED.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2224	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3336	kat7AED.tmp
3336	kat7AED.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 3336	1692	e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe	78
PID 1692 wrote to memory of 3336	1692	e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe	78
PID 1692 wrote to memory of 3336	1692	e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe	78
PID 1692 wrote to memory of 3336	1692	e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe	78
PID 1692 wrote to memory of 3336	1692	e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe	78
PID 1692 wrote to memory of 3336	1692	e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe	78
PID 1692 wrote to memory of 3336	1692	e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe	78
PID 1692 wrote to memory of 3336	1692	e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe	78
PID 3336 wrote to memory of 2356	3336	kat7AED.tmp	80
PID 3336 wrote to memory of 2356	3336	kat7AED.tmp	80
PID 3336 wrote to memory of 2356	3336	kat7AED.tmp	80
PID 2356 wrote to memory of 2224	2356	cmd.exe	82
PID 2356 wrote to memory of 2224	2356	cmd.exe	82
PID 2356 wrote to memory of 2224	2356	cmd.exe	82

C:\Users\Admin\AppData\Local\Temp\e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe
"C:\Users\Admin\AppData\Local\Temp\e293ae74e0c95ddf5ac5c4fe21f81fb14a6b8003e45374dd02b7d8d1ba1e32fa.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Users\Admin\AppData\Local\Temp\kat7AED.tmp
  C:\Users\Admin\AppData\Local\Temp\kat7AED.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3336
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat7AED.tmp" & rd /s /q "C:\ProgramData\DBKEGCAEGIIJ" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2356
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:2224

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

kat7AED.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat7AED.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

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memory/1692-0-0x0000000002320000-0x0000000002321000-memory.dmp

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memory/1692-1-0x0000000003FA0000-0x00000000040B0000-memory.dmp

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memory/1692-10-0x0000000000400000-0x00000000005B8000-memory.dmp

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memory/3336-9-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3336-8-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3336-4-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3336-11-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3336-12-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3336-13-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3336-14-0x0000000000400000-0x0000000000648000-memory.dmp

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memory/3336-17-0x0000000000400000-0x0000000000648000-memory.dmp

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