stealc | 4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42

General

Target

4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe
Size

2.0MB
MD5

0983feada2901e346361c96c0925e125
SHA1

5ff315892a946e1f4fb788456f48ad701b167b68
SHA256

4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42
SHA512

6596aa6f48d71ba82db7d4f8827acb54669c95ee59d63820c73d0509cf69ac35d75968dd516c876d84af3c09ada0bf24d9b4686ed70e3c26afa65eb99909d426
SSDEEP

49152:7QzHt472DrJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtFtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/4716-2-0x0000000004140000-0x0000000004289000-memory.dmp	family_vidar_v7
behavioral2/memory/2972-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2972-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2972-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2972-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2972-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2972-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/2972-36-0x0000000000400000-0x0000000000646000-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:

kat2B56.tmp

pid process

2972 kat2B56.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
2972	kat2B56.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe

description	pid	process	target process
PID 4716 set thread context of 2972	4716	4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe	kat2B56.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:

kat2B56.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat2B56.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat2B56.tmp

pid process

2972 kat2B56.tmp
2972 kat2B56.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat2B56.tmp

pid	process
2972	kat2B56.tmp
2972	kat2B56.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe

description	pid	process	target process
PID 4716 wrote to memory of 2972	4716	4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe	kat2B56.tmp
PID 4716 wrote to memory of 2972	4716	4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe	kat2B56.tmp
PID 4716 wrote to memory of 2972	4716	4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe	kat2B56.tmp
PID 4716 wrote to memory of 2972	4716	4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe	kat2B56.tmp
PID 4716 wrote to memory of 2972	4716	4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe	kat2B56.tmp
PID 4716 wrote to memory of 2972	4716	4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe	kat2B56.tmp
PID 4716 wrote to memory of 2972	4716	4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe	kat2B56.tmp
PID 4716 wrote to memory of 2972	4716	4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe	kat2B56.tmp

C:\Users\Admin\AppData\Local\Temp\4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe
"C:\Users\Admin\AppData\Local\Temp\4ca212f4155f208d48f4a16149286eb810c87500d9c15d958ce7ae2835c22f42.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4716

C:\Users\Admin\AppData\Local\Temp\kat2B56.tmp
C:\Users\Admin\AppData\Local\Temp\kat2B56.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:2972

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat2B56.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2972-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2972-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2972-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2972-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2972-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2972-20-0x000000001B7A0000-0x000000001B9FF000-memory.dmp

Filesize
2.4MB

Download
memory/2972-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2972-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4716-0-0x00000000023B0000-0x00000000023B1000-memory.dmp

Filesize
4KB

Download
memory/4716-2-0x0000000004140000-0x0000000004289000-memory.dmp

Filesize
1.3MB

Download
memory/4716-10-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads