stealc | 8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712

Analysis

max time kernel
134s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
03/06/2024, 14:34

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General

Target
8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe
Size 2.4MB
Sample240603-rxm84aah78
SHA256 8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712
MD5 c5d8303164f650fe71c8715e4f29ec7b
SHA1 dd3e5e1993eea55e20fcaa4ca39924a47bc2afe6
SHA512 3c737e3d54058d346ca5b506e4d8aa219b87bc79a715d32985b65f55906947ca55caf4e90bb492f99c4145f0d0adec3cd7a378ef799ea9c65cda9696c94776f5
SSDEEP 49152:wQc81KnB/a/hNT/d1Ya8aesY3Ot4N7G/:wDta/hNT/d1n0etD/
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 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/4696-2-0x0000000002AF0000-0x0000000002C3C000-memory.dmp	family_vidar_v7
behavioral2/memory/1184-10-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1184-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1184-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1184-13-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1184-30-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1184-31-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1184-47-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1184-54-0x0000000000400000-0x0000000000649000-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
1184	kat6BBA.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 4696 set thread context of 1184	4696	8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe	87

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	kat6BBA.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1184	kat6BBA.tmp
1184	kat6BBA.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4696 wrote to memory of 1184	4696	8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe	87
PID 4696 wrote to memory of 1184	4696	8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe	87
PID 4696 wrote to memory of 1184	4696	8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe	87
PID 4696 wrote to memory of 1184	4696	8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe	87
PID 4696 wrote to memory of 1184	4696	8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe	87
PID 4696 wrote to memory of 1184	4696	8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe	87
PID 4696 wrote to memory of 1184	4696	8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe	87
PID 4696 wrote to memory of 1184	4696	8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe	87

C:\Users\Admin\AppData\Local\Temp\8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe
"C:\Users\Admin\AppData\Local\Temp\8289208f9c675693e334127ef972f09511a807c0f278854eba2e54a892e7b712.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4696
- C:\Users\Admin\AppData\Local\Temp\kat6BBA.tmp
  C:\Users\Admin\AppData\Local\Temp\kat6BBA.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1184

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

kat6BBA.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat6BBA.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/1184-4-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/1184-10-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/1184-8-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/1184-13-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/1184-15-0x000000001DC50000-0x000000001DEAF000-memory.dmp

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memory/1184-30-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/1184-31-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/1184-47-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/1184-54-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/4696-2-0x0000000002AF0000-0x0000000002C3C000-memory.dmp

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memory/4696-9-0x0000000000400000-0x0000000000663000-memory.dmp

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memory/4696-0-0x0000000000720000-0x0000000000721000-memory.dmp

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