stealc | f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1

Analysis

max time kernel
146s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
09/06/2024, 18:31

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe
Size 2.4MB
Sample240609-w5564aec34
SHA256 f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1
MD5 86a1d3a5db832dc879045bf26e0e2643
SHA1 5052faf666e54a1574ab6f9ea0afd8852c3db5c8
SHA512 91eea9972914b8a8d88c2028ce6234f5b73ddddb7dcc5fe69c07767bd8bb93974532a1979432ddb677133420b5c6c26e8ba9819603a87430aa9b700e62c036d6
SSDEEP 49152:L78Cw52xsz+0YsEAQACR07Q3byRD8aXY658:g52xsz+0YfAw07QLyLn
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 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/1468-2-0x0000000004100000-0x0000000004263000-memory.dmp	family_vidar_v7
behavioral2/memory/3628-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3628-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3628-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3628-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3628-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3628-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/3628-43-0x0000000000400000-0x0000000000648000-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
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
3628	kat6551.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 1468 set thread context of 3628	1468	f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe	77

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	kat6551.tmp

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\2796BAE63F1801E277261BA0D77770028F20EEE4	kat6551.tmp
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\2796BAE63F1801E277261BA0D77770028F20EEE4\Blob = 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	kat6551.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3628	kat6551.tmp
3628	kat6551.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1468 wrote to memory of 3628	1468	f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe	77
PID 1468 wrote to memory of 3628	1468	f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe	77
PID 1468 wrote to memory of 3628	1468	f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe	77
PID 1468 wrote to memory of 3628	1468	f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe	77
PID 1468 wrote to memory of 3628	1468	f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe	77
PID 1468 wrote to memory of 3628	1468	f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe	77
PID 1468 wrote to memory of 3628	1468	f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe	77
PID 1468 wrote to memory of 3628	1468	f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe	77

C:\Users\Admin\AppData\Local\Temp\f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe
"C:\Users\Admin\AppData\Local\Temp\f556b593887dd11951f066087e1012263dc75148e259e61695667e426a015ed1.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1468
- C:\Users\Admin\AppData\Local\Temp\kat6551.tmp
  C:\Users\Admin\AppData\Local\Temp\kat6551.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  PID:3628

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

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

Loading Replay Monitor...

Downloads

kat6551.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat6551.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1468-0-0x00000000024D0000-0x00000000024D1000-memory.dmp

Download

memory/1468-2-0x0000000004100000-0x0000000004263000-memory.dmp

Download

memory/1468-10-0x0000000000400000-0x0000000000663000-memory.dmp

Download

memory/3628-8-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/3628-4-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/3628-9-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/3628-24-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/3628-25-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/3628-27-0x000000001B8C0000-0x000000001BB1F000-memory.dmp

Download

memory/3628-42-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/3628-43-0x0000000000400000-0x0000000000648000-memory.dmp

Download