stealc | b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85

Analysis

max time kernel
91s
max time network
94s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
07/06/2024, 16:39

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe
Size 2.5MB
Sample240607-t58acacb96
SHA256 b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85
MD5 10372ed10d43ff15ffc1ac35a633b9f0
SHA1 49a50f3e916d27baf8af322d9dc0d4fcc386c3c8
SHA512 2655f20b2077ca7c848da4e0fc98cc27557d92958ff813942336af6bb61a15b2e4497b1ea1b2b6285ab2c00b69ba89c5c792991ce8e1fd3cb6af620cea5d6a86
SSDEEP 49152:Zcm4081qpZBUbHEmJasEAQACR07Q3byRD8aXY658:ZcmmqvBUbHtkfAw07QLyLn
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/2520-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2520-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2520-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1088-2-0x0000000004150000-0x00000000042B3000-memory.dmp	family_vidar_v7
behavioral2/memory/2520-15-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2520-16-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2520-33-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2520-34-0x0000000000400000-0x0000000000648000-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
2520	kat6D50.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 1088 set thread context of 2520	1088	b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe	78

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	kat6D50.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2520	kat6D50.tmp
2520	kat6D50.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 2520	1088	b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe	78
PID 1088 wrote to memory of 2520	1088	b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe	78
PID 1088 wrote to memory of 2520	1088	b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe	78
PID 1088 wrote to memory of 2520	1088	b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe	78
PID 1088 wrote to memory of 2520	1088	b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe	78
PID 1088 wrote to memory of 2520	1088	b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe	78
PID 1088 wrote to memory of 2520	1088	b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe	78
PID 1088 wrote to memory of 2520	1088	b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe	78

C:\Users\Admin\AppData\Local\Temp\b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe
"C:\Users\Admin\AppData\Local\Temp\b69558f58e7c1fa69f138ebe4ec2032273081577cef00b2a44f6cb92a93ffc85.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1088
- C:\Users\Admin\AppData\Local\Temp\kat6D50.tmp
  C:\Users\Admin\AppData\Local\Temp\kat6D50.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2520

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

Loading Replay Monitor...

Downloads

kat6D50.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat6D50.tmp
Size 448KB
SHA256 8cdc50bc308edd6d0f70d7c8203f0ef469daaa62ae801a00c93e6b9160fef772
MD5 d7d3e9e68f500a5362ef855382d5934b
SHA1 740495877cbcda9c61c8eb1ce3cb0c0f20738a81
SHA512 512f5d5764050274d5beb6c966c787eb50a9850ec4c4886cda14f3a912dc627d29d2cac5db7f825500041a47ce65ecc4e8f728dc934c748f6575ae17d4c2cf89
SSDEEP 12288:WNt0EArdQ0h4vglO1CYcRxJ8I4awnQb7hcr9h5Jl4:o0ESdQpglO1CxDyawn27h+9hrl4
MD5 SHA1 SHA512 SSDEEP

Submit Download

kat6D50.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat6D50.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1088-2-0x0000000004150000-0x00000000042B3000-memory.dmp

Download

memory/1088-10-0x0000000000400000-0x000000000067A000-memory.dmp

Download

memory/1088-0-0x00000000024D0000-0x00000000024D1000-memory.dmp

Download

memory/2520-4-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/2520-8-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/2520-9-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/2520-15-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/2520-16-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/2520-18-0x00000000193C0000-0x000000001961F000-memory.dmp

Download

memory/2520-33-0x0000000000400000-0x0000000000648000-memory.dmp

Download

memory/2520-34-0x0000000000400000-0x0000000000648000-memory.dmp

Download