stealc | f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b

Analysis

max time kernel
90s
max time network
127s
platform
windows11-21h2_x64
resource
win11-20240419-en
resource tags

arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
submitted
30-06-2024 16:17

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General

Target

f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe
Size

2.2MB
MD5

d66fe6aa590dbd009f6f696c485b3f91
SHA1

58c9c6e68d9c5878f4517ef9c50b06b941a770e2
SHA256

f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b
SHA512

70b61d068a17e4135d1a5a31ded33afa5c5d8fc6a36f0b8b71f6e8aef5dd087897e63f3d85c6eae83477dfe2aed1cb4f87545b7cc2a9d11418ffe533516e84c4
SSDEEP

24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgXnBU2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MPe21tuuIeNHYGY0LzjsJxK

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/748-2-0x00000000040A0000-0x00000000041B3000-memory.dmp	family_vidar_v7
behavioral2/memory/4872-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4872-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4872-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4872-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4872-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4872-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4872-43-0x0000000000400000-0x0000000000648000-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

Processes:

kat39CD.tmp

pid process

4872 kat39CD.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

Processes:

f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe

description pid process target process

PID 748 set thread context of 4872 748 f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe kat39CD.tmp

pid	process
4872	kat39CD.tmp

description	pid	process	target process
PID 748 set thread context of 4872	748	f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe	kat39CD.tmp

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

kat39CD.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat39CD.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat39CD.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat39CD.tmp

pid process

4872 kat39CD.tmp
4872 kat39CD.tmp
4872 kat39CD.tmp
4872 kat39CD.tmp

pid	process
4872	kat39CD.tmp
4872	kat39CD.tmp
4872	kat39CD.tmp
4872	kat39CD.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe

description	pid	process	target process
PID 748 wrote to memory of 4872	748	f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe	kat39CD.tmp
PID 748 wrote to memory of 4872	748	f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe	kat39CD.tmp
PID 748 wrote to memory of 4872	748	f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe	kat39CD.tmp
PID 748 wrote to memory of 4872	748	f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe	kat39CD.tmp
PID 748 wrote to memory of 4872	748	f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe	kat39CD.tmp
PID 748 wrote to memory of 4872	748	f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe	kat39CD.tmp
PID 748 wrote to memory of 4872	748	f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe	kat39CD.tmp
PID 748 wrote to memory of 4872	748	f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe	kat39CD.tmp

C:\Users\Admin\AppData\Local\Temp\f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe
"C:\Users\Admin\AppData\Local\Temp\f252eae8007fe2e271ec706aaf109e01b95b57d8544d7a76e21790bbfdfc0d8b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:748

C:\Users\Admin\AppData\Local\Temp\kat39CD.tmp
C:\Users\Admin\AppData\Local\Temp\kat39CD.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4872

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat39CD.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/748-0-0x0000000002380000-0x0000000002381000-memory.dmp

Filesize
4KB

Download
memory/748-2-0x00000000040A0000-0x00000000041B3000-memory.dmp

Filesize
1.1MB

Download
memory/748-10-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download
memory/4872-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4872-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4872-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4872-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4872-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4872-27-0x000000002D1D0000-0x000000002D42F000-memory.dmp

Filesize
2.4MB

Download
memory/4872-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4872-43-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download