stealc | 3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98

General

Target

3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe
Size

2.0MB
MD5

f001fe770e635d69ce739e0126a82d40
SHA1

5d339a8017e309bee38419614c3cae21e87aa4b1
SHA256

3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98
SHA512

b4e98a48897183b2322821a35b8cdee5a8af210124e379b4aa729f97783a0db1acf883457c995a70e99a7fecd06c638bc816d6f34c0397ead60072ad14e66646
SSDEEP

49152:s4K3x1vUqJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18qtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

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
behavioral2/memory/3024-1-0x0000000004060000-0x00000000041A9000-memory.dmp	family_vidar_v7
behavioral2/memory/4952-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4952-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4952-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4952-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4952-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4952-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4952-38-0x0000000000400000-0x0000000000646000-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:

kat43A0.tmp

pid process

4952 kat43A0.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
4952	kat43A0.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe

description	pid	process	target process
PID 3024 set thread context of 4952	3024	3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe	kat43A0.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:

kat43A0.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat43A0.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat43A0.tmp

pid process

4952 kat43A0.tmp
4952 kat43A0.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat43A0.tmp

pid	process
4952	kat43A0.tmp
4952	kat43A0.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe

description	pid	process	target process
PID 3024 wrote to memory of 4952	3024	3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe	kat43A0.tmp
PID 3024 wrote to memory of 4952	3024	3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe	kat43A0.tmp
PID 3024 wrote to memory of 4952	3024	3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe	kat43A0.tmp
PID 3024 wrote to memory of 4952	3024	3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe	kat43A0.tmp
PID 3024 wrote to memory of 4952	3024	3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe	kat43A0.tmp
PID 3024 wrote to memory of 4952	3024	3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe	kat43A0.tmp
PID 3024 wrote to memory of 4952	3024	3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe	kat43A0.tmp
PID 3024 wrote to memory of 4952	3024	3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe	kat43A0.tmp

C:\Users\Admin\AppData\Local\Temp\3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe
"C:\Users\Admin\AppData\Local\Temp\3144597548e676862adce959fc3a6d575813a64c0ab0c5531faf60f12056ff98.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3024

C:\Users\Admin\AppData\Local\Temp\kat43A0.tmp
C:\Users\Admin\AppData\Local\Temp\kat43A0.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4952

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat43A0.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3024-0-0x0000000002360000-0x0000000002361000-memory.dmp

Filesize
4KB

Download
memory/3024-1-0x0000000004060000-0x00000000041A9000-memory.dmp

Filesize
1.3MB

Download
memory/3024-10-0x0000000000400000-0x000000000060C000-memory.dmp

Filesize
2.0MB

Download
memory/4952-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4952-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4952-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4952-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4952-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4952-22-0x00000000260E0000-0x000000002633F000-memory.dmp

Filesize
2.4MB

Download
memory/4952-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4952-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads