stealc | 90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296

General

Target

90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe
Size

1.9MB
MD5

92b4928c9a4b6cfda199acb18077e7e6
SHA1

b623ff6b5f8bc6f653ec0018c0831aa3efafd002
SHA256

90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296
SHA512

fc84e6e06e47012f55c3055b87a4542d16e68dffd7c85ed6c3b0881413221928073e592869fb56fda4d7188ccfd2858230ce714bf5f3d6673e8f93b4aaad0c3e
SSDEEP

49152:CdKfTn6vWJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnVtIuoITsdZ

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/4604-1-0x0000000004090000-0x00000000041D9000-memory.dmp	family_vidar_v7
behavioral2/memory/3920-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3920-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3920-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3920-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3920-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3920-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3920-38-0x0000000000400000-0x0000000000646000-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:

kat5554.tmp

pid process

3920 kat5554.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
3920	kat5554.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe

description	pid	process	target process
PID 4604 set thread context of 3920	4604	90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe	kat5554.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:

kat5554.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat5554.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat5554.tmp

pid process

3920 kat5554.tmp
3920 kat5554.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5554.tmp

pid	process
3920	kat5554.tmp
3920	kat5554.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe

description	pid	process	target process
PID 4604 wrote to memory of 3920	4604	90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe	kat5554.tmp
PID 4604 wrote to memory of 3920	4604	90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe	kat5554.tmp
PID 4604 wrote to memory of 3920	4604	90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe	kat5554.tmp
PID 4604 wrote to memory of 3920	4604	90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe	kat5554.tmp
PID 4604 wrote to memory of 3920	4604	90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe	kat5554.tmp
PID 4604 wrote to memory of 3920	4604	90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe	kat5554.tmp
PID 4604 wrote to memory of 3920	4604	90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe	kat5554.tmp
PID 4604 wrote to memory of 3920	4604	90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe	kat5554.tmp

C:\Users\Admin\AppData\Local\Temp\90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe
"C:\Users\Admin\AppData\Local\Temp\90f0219a097ebd946b0f41f0fa4c79a2f606d68621d4e4ca6edc2cc3eb724296.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4604

C:\Users\Admin\AppData\Local\Temp\kat5554.tmp
C:\Users\Admin\AppData\Local\Temp\kat5554.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3920

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\kat5554.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3920-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3920-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3920-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3920-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3920-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3920-22-0x0000000026040000-0x000000002629F000-memory.dmp

Filesize
2.4MB

Download
memory/3920-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3920-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4604-0-0x0000000002340000-0x0000000002341000-memory.dmp

Filesize
4KB

Download
memory/4604-1-0x0000000004090000-0x00000000041D9000-memory.dmp

Filesize
1.3MB

Download
memory/4604-10-0x0000000000400000-0x00000000005EC000-memory.dmp

Filesize
1.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads