stealc | 5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575

General

Target

5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe
Size

1.6MB
MD5

437b5ec960a76ed1c4f76388659694d6
SHA1

335c6b42d5c78550d551d1afc10ecf6abb201fab
SHA256

5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575
SHA512

dfa8ee452c757d4355dac8709646f6eb9b791ecf705066346c9ddf9497ea4c3d2bd03536c7e7dc419b9a87350d54b47d4917dac5bfe4ec1e4be1edb1bbd8274b
SSDEEP

24576:spM5863IGfTAVpalBwUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BwUkxVVChjHZQs

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
behavioral2/memory/4724-1-0x0000000004040000-0x0000000004150000-memory.dmp	family_vidar_v7
behavioral2/memory/4168-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4168-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4168-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4168-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4168-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4168-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4168-43-0x0000000000400000-0x0000000000648000-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:

kat4F87.tmp

pid process

4168 kat4F87.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
4168	kat4F87.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe

description	pid	process	target process
PID 4724 set thread context of 4168	4724	5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe	kat4F87.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:

kat4F87.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4F87.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat4F87.tmp

pid process

4168 kat4F87.tmp
4168 kat4F87.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4F87.tmp

pid	process
4168	kat4F87.tmp
4168	kat4F87.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe

description	pid	process	target process
PID 4724 wrote to memory of 4168	4724	5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe	kat4F87.tmp
PID 4724 wrote to memory of 4168	4724	5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe	kat4F87.tmp
PID 4724 wrote to memory of 4168	4724	5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe	kat4F87.tmp
PID 4724 wrote to memory of 4168	4724	5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe	kat4F87.tmp
PID 4724 wrote to memory of 4168	4724	5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe	kat4F87.tmp
PID 4724 wrote to memory of 4168	4724	5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe	kat4F87.tmp
PID 4724 wrote to memory of 4168	4724	5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe	kat4F87.tmp
PID 4724 wrote to memory of 4168	4724	5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe	kat4F87.tmp

C:\Users\Admin\AppData\Local\Temp\5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe
"C:\Users\Admin\AppData\Local\Temp\5f8d442522879f6ae09875bc1bbc97565f94674e0aa60e796c20c5abdd58f575.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4724

C:\Users\Admin\AppData\Local\Temp\kat4F87.tmp
C:\Users\Admin\AppData\Local\Temp\kat4F87.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4168

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\kat4F87.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4168-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4168-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4168-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4168-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4168-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4168-28-0x0000000028510000-0x000000002876F000-memory.dmp

Filesize
2.4MB

Download
memory/4168-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4168-43-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4724-0-0x0000000002300000-0x0000000002301000-memory.dmp

Filesize
4KB

Download
memory/4724-1-0x0000000004040000-0x0000000004150000-memory.dmp

Filesize
1.1MB

Download
memory/4724-10-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads