stealc | 008c59bdc20f21e32cb96a166eeedf9948eefea640a37f7fb2b3a5c1649d4e0a

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
04/06/2024, 05:57

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General

Target
960f13d730e832f027d49677fe945acc.exe
Size 1.8MB
Sample240604-gnk29sfd3s
SHA256 008c59bdc20f21e32cb96a166eeedf9948eefea640a37f7fb2b3a5c1649d4e0a
MD5 960f13d730e832f027d49677fe945acc
SHA1 2e5ba700550b449120dbeaf3cb1ac0a109f5ee65
SHA512 d9f9653177b2f01b01c430306019cf3217160d39f28f960caa97e984d3427ebf3fcb0eb50a5ad9db76cc7f99a36de39acd96619f3128bd365479a546c26b91d9
SSDEEP 24576:W7YfUB7F1931tbQYaOV+rEfv0xwT3zxNOt4XigDSCuptNEynEsqqfD:W75B7FDFtbQYa8aesY3Ot4N7G/
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/ta904ek
https://steamcommunity.com/profiles/76561199695752269

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 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/3020-2-0x0000000002B50000-0x0000000002C9C000-memory.dmp	family_vidar_v7
behavioral2/memory/396-9-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/396-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/396-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/396-13-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/396-14-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/396-31-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/396-32-0x0000000000400000-0x0000000000649000-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
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
396	kat4B41.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3020 set thread context of 396	3020	960f13d730e832f027d49677fe945acc.exe	89

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	kat4B41.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
396	kat4B41.tmp
396	kat4B41.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3020 wrote to memory of 396	3020	960f13d730e832f027d49677fe945acc.exe	89
PID 3020 wrote to memory of 396	3020	960f13d730e832f027d49677fe945acc.exe	89
PID 3020 wrote to memory of 396	3020	960f13d730e832f027d49677fe945acc.exe	89
PID 3020 wrote to memory of 396	3020	960f13d730e832f027d49677fe945acc.exe	89
PID 3020 wrote to memory of 396	3020	960f13d730e832f027d49677fe945acc.exe	89
PID 3020 wrote to memory of 396	3020	960f13d730e832f027d49677fe945acc.exe	89
PID 3020 wrote to memory of 396	3020	960f13d730e832f027d49677fe945acc.exe	89
PID 3020 wrote to memory of 396	3020	960f13d730e832f027d49677fe945acc.exe	89

C:\Users\Admin\AppData\Local\Temp\960f13d730e832f027d49677fe945acc.exe
"C:\Users\Admin\AppData\Local\Temp\960f13d730e832f027d49677fe945acc.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3020
- C:\Users\Admin\AppData\Local\Temp\kat4B41.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4B41.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:396

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

Replay Monitor

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Downloads

kat4B41.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat4B41.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/396-9-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/396-4-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/396-8-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/396-13-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/396-14-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/396-16-0x000000001B790000-0x000000001B9EF000-memory.dmp

Download

memory/396-31-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/396-32-0x0000000000400000-0x0000000000649000-memory.dmp

Download

memory/3020-0-0x0000000002370000-0x0000000002371000-memory.dmp

Download

memory/3020-2-0x0000000002B50000-0x0000000002C9C000-memory.dmp

Download

memory/3020-10-0x0000000000400000-0x00000000005CE000-memory.dmp

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