stealc | 6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750

General

Target

6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe
Size

2.0MB
MD5

1a9885e8eb7c36baba8c0e99ab61c3f4
SHA1

791363ed4f1fea342b3495c18f5854f67d0fb06d
SHA256

6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750
SHA512

11982a8f593ba55352f343385c7864d052070834d7110538d66f837810984fd6f7bb9575a6b4d2ec2f28ee02044ee246560d780fb3b84aefe72bd18915258e04
SSDEEP

49152:s4K3x1vUeJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18etIuoITsdZ

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
behavioral1/memory/4180-1-0x0000000003FE0000-0x0000000004129000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-36-0x0000000000400000-0x0000000000646000-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:

kat4546.tmp

pid process

2916 kat4546.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
2916	kat4546.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe

description	pid	process	target process
PID 4180 set thread context of 2916	4180	6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe	kat4546.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:

kat4546.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4546.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat4546.tmp

pid process

2916 kat4546.tmp
2916 kat4546.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4546.tmp

pid	process
2916	kat4546.tmp
2916	kat4546.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe

description	pid	process	target process
PID 4180 wrote to memory of 2916	4180	6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe	kat4546.tmp
PID 4180 wrote to memory of 2916	4180	6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe	kat4546.tmp
PID 4180 wrote to memory of 2916	4180	6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe	kat4546.tmp
PID 4180 wrote to memory of 2916	4180	6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe	kat4546.tmp
PID 4180 wrote to memory of 2916	4180	6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe	kat4546.tmp
PID 4180 wrote to memory of 2916	4180	6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe	kat4546.tmp
PID 4180 wrote to memory of 2916	4180	6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe	kat4546.tmp
PID 4180 wrote to memory of 2916	4180	6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe	kat4546.tmp

C:\Users\Admin\AppData\Local\Temp\6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe
"C:\Users\Admin\AppData\Local\Temp\6facc5a53b89df09c6bbf49a407ac86c82a620213213e6f9fa914cbb37fb4750.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4180

C:\Users\Admin\AppData\Local\Temp\kat4546.tmp
C:\Users\Admin\AppData\Local\Temp\kat4546.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:2916

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\kat4546.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2916-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-20-0x000000001B7C0000-0x000000001BA1F000-memory.dmp

Filesize
2.4MB

Download
memory/2916-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4180-0-0x0000000002260000-0x0000000002261000-memory.dmp

Filesize
4KB

Download
memory/4180-1-0x0000000003FE0000-0x0000000004129000-memory.dmp

Filesize
1.3MB

Download
memory/4180-6-0x0000000000400000-0x000000000060C000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads