stealc | 727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389

General

Target

727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe
Size

1.9MB
MD5

71ab51dd9e666f8cc7040b9dabaf6497
SHA1

dda6f9ad37192842c013e8e2d39d56fe789fca65
SHA256

727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389
SHA512

a201a579983cc6fe19c6cbaa8dc1806e6792963be97519c8ae8753003a7238a698017865d0f68d1378dda9544b0cf7f49ae6589e6635964c1151457d5039405e
SSDEEP

24576:n/eC7bzaXi7m04Ju0LXolGLbJnR/z4+EbVbw2qug4ctOlQLernWO:nGYz0P04MS4cdR/z4+UVi4e9Crn

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

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/4152-1-0x0000000004150000-0x00000000042B6000-memory.dmp	family_vidar_v7
behavioral2/memory/4460-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4460-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4460-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4460-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4460-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4460-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4460-43-0x0000000000400000-0x0000000000648000-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
4460	kat58ED.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 4152 set thread context of 4460	4152	727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.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	kat58ED.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4460	kat58ED.tmp
4460	kat58ED.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4152 wrote to memory of 4460	4152	727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe	78
PID 4152 wrote to memory of 4460	4152	727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe	78
PID 4152 wrote to memory of 4460	4152	727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe	78
PID 4152 wrote to memory of 4460	4152	727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe	78
PID 4152 wrote to memory of 4460	4152	727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe	78
PID 4152 wrote to memory of 4460	4152	727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe	78
PID 4152 wrote to memory of 4460	4152	727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe	78
PID 4152 wrote to memory of 4460	4152	727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe	78

C:\Users\Admin\AppData\Local\Temp\727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe
"C:\Users\Admin\AppData\Local\Temp\727a881f1ddb5b179e1b6177275a7d3479bbe75092e5305c2fd967100a816389.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4152
- C:\Users\Admin\AppData\Local\Temp\kat58ED.tmp
  C:\Users\Admin\AppData\Local\Temp\kat58ED.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4460

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\kat58ED.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4152-0-0x0000000002680000-0x0000000002681000-memory.dmp

Filesize
4KB

Download
memory/4152-1-0x0000000004150000-0x00000000042B6000-memory.dmp

Filesize
1.4MB

Download
memory/4152-9-0x0000000000400000-0x00000000005DF000-memory.dmp

Filesize
1.9MB

Download
memory/4460-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4460-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4460-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4460-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4460-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4460-28-0x00000000260E0000-0x000000002633F000-memory.dmp

Filesize
2.4MB

Download
memory/4460-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4460-43-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads