stealc | 87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941

General

Target

87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe
Size

1.6MB
MD5

b0cade74e16868aecde250275405e7a2
SHA1

5613dccc16556cd70ce71cf0cd6506a841fef1e8
SHA256

87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941
SHA512

8cd6186a8723337f20514846f6569248b632ad396b4a9064dd998e255e824b40e2ca12be204668a6f1d3e21b1bbb68d45f8fd7437fdd120ad80c15757f973481
SSDEEP

24576:spM5863IGfTAVpalBUUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BUUkxVVChjHZQs

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

Processes:

resource	yara_rule
behavioral1/memory/4256-1-0x0000000003FA0000-0x00000000040B0000-memory.dmp	family_vidar_v7
behavioral1/memory/812-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/812-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/812-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/812-22-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/812-23-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/812-40-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/812-41-0x0000000000400000-0x0000000000648000-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:

kat516C.tmp

pid process

812 kat516C.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

pid	process
812	kat516C.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe

description	pid	process	target process
PID 4256 set thread context of 812	4256	87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe	kat516C.tmp

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

Processes:

kat516C.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat516C.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat516C.tmp

pid process

812 kat516C.tmp
812 kat516C.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat516C.tmp

pid	process
812	kat516C.tmp
812	kat516C.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe

description	pid	process	target process
PID 4256 wrote to memory of 812	4256	87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe	kat516C.tmp
PID 4256 wrote to memory of 812	4256	87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe	kat516C.tmp
PID 4256 wrote to memory of 812	4256	87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe	kat516C.tmp
PID 4256 wrote to memory of 812	4256	87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe	kat516C.tmp
PID 4256 wrote to memory of 812	4256	87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe	kat516C.tmp
PID 4256 wrote to memory of 812	4256	87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe	kat516C.tmp
PID 4256 wrote to memory of 812	4256	87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe	kat516C.tmp
PID 4256 wrote to memory of 812	4256	87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe	kat516C.tmp

C:\Users\Admin\AppData\Local\Temp\87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe
"C:\Users\Admin\AppData\Local\Temp\87f1314566ed1eb5d2e3af2218d9cb544c3c3c15151dd4c1788fffc77bd53941.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4256

C:\Users\Admin\AppData\Local\Temp\kat516C.tmp
C:\Users\Admin\AppData\Local\Temp\kat516C.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:812

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat516C.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/812-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/812-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/812-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/812-22-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/812-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/812-25-0x000000001B7D0000-0x000000001BA2F000-memory.dmp

Filesize
2.4MB

Download
memory/812-40-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/812-41-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4256-0-0x0000000000850000-0x0000000000851000-memory.dmp

Filesize
4KB

Download
memory/4256-1-0x0000000003FA0000-0x00000000040B0000-memory.dmp

Filesize
1.1MB

Download
memory/4256-9-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads