stealc | 650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86

General

Target

650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe
Size

2.0MB
MD5

4e0eb83bbcf7f998e31ba3f74a4cf4ab
SHA1

3b72fc1d234996f8d44e931a56bd57b599c34f7f
SHA256

650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86
SHA512

7c924cf00d9ab689a0e474051c534001b1fc6bd2a8133a1f8f7de5fa8d277f0677aa19853206e01ab8bb78e79efd8ed5367edf09349a4f448aa1622f5ce4e120
SSDEEP

49152:eqtdPVosJEEz/+VHA58ljrIY+96lJS9bZ:e6d9fJVc7jvedZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

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/1876-1-0x0000000004190000-0x00000000042DC000-memory.dmp	family_vidar_v7
behavioral2/memory/648-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/648-10-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/648-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/648-15-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/648-16-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/648-33-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/648-34-0x0000000000400000-0x0000000000649000-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
648	kat6C27.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 1876 set thread context of 648	1876	650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe	76

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	kat6C27.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
648	kat6C27.tmp
648	kat6C27.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 648	1876	650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe	76
PID 1876 wrote to memory of 648	1876	650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe	76
PID 1876 wrote to memory of 648	1876	650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe	76
PID 1876 wrote to memory of 648	1876	650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe	76
PID 1876 wrote to memory of 648	1876	650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe	76
PID 1876 wrote to memory of 648	1876	650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe	76
PID 1876 wrote to memory of 648	1876	650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe	76
PID 1876 wrote to memory of 648	1876	650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe	76

C:\Users\Admin\AppData\Local\Temp\650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe
"C:\Users\Admin\AppData\Local\Temp\650c91559024340e3123d84f9d41849af55ad3e9695f8cb6bffb3e82a93d8b86.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Users\Admin\AppData\Local\Temp\kat6C27.tmp
  C:\Users\Admin\AppData\Local\Temp\kat6C27.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat6C27.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/648-8-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/648-10-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/648-4-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/648-15-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/648-16-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/648-18-0x0000000019430000-0x000000001968F000-memory.dmp

Filesize
2.4MB

Download
memory/648-33-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/648-34-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1876-0-0x0000000002590000-0x0000000002591000-memory.dmp

Filesize
4KB

Download
memory/1876-1-0x0000000004190000-0x00000000042DC000-memory.dmp

Filesize
1.3MB

Download
memory/1876-9-0x0000000000400000-0x0000000000614000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads