stealc | a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455

General

Target

a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe
Size

1.6MB
MD5

8d2ae94a5ca34010edbbacf0731d23e2
SHA1

5c77ba116efb10a1d7457fb1fe578330ba764395
SHA256

a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455
SHA512

ac2c82c57580cf8f0f3d0b57d558b81e548dc4cfc7bfd69dd2f275c5e91e984269862f7ff8794cf18f89c387bacf092537097c713a8a1c0ce1d3b38bea01578e
SSDEEP

24576:spM5863IGfTAVpalBtUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BtUkxVVChjHZQs

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 9 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/240-2-0x0000000004100000-0x0000000004210000-memory.dmp	family_vidar_v7
behavioral2/memory/4176-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4176-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4176-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4176-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4176-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4176-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4176-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4176-17-0x0000000000400000-0x0000000000648000-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
Executes dropped EXE 1 IoCs

Processes:

kat606F.tmp

pid process

4176 kat606F.tmp
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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
4176	kat606F.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe

description	pid	process	target process
PID 240 set thread context of 4176	240	a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe	kat606F.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
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:

kat606F.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat606F.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3644 timeout.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat606F.tmp

pid process

4176 kat606F.tmp
4176 kat606F.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat606F.tmp

pid	process
3644	timeout.exe

pid	process
4176	kat606F.tmp
4176	kat606F.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exekat606F.tmpcmd.exe

description	pid	process	target process
PID 240 wrote to memory of 4176	240	a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe	kat606F.tmp
PID 240 wrote to memory of 4176	240	a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe	kat606F.tmp
PID 240 wrote to memory of 4176	240	a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe	kat606F.tmp
PID 240 wrote to memory of 4176	240	a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe	kat606F.tmp
PID 240 wrote to memory of 4176	240	a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe	kat606F.tmp
PID 240 wrote to memory of 4176	240	a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe	kat606F.tmp
PID 240 wrote to memory of 4176	240	a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe	kat606F.tmp
PID 240 wrote to memory of 4176	240	a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe	kat606F.tmp
PID 4176 wrote to memory of 1240	4176	kat606F.tmp	cmd.exe
PID 4176 wrote to memory of 1240	4176	kat606F.tmp	cmd.exe
PID 4176 wrote to memory of 1240	4176	kat606F.tmp	cmd.exe
PID 1240 wrote to memory of 3644	1240	cmd.exe	timeout.exe
PID 1240 wrote to memory of 3644	1240	cmd.exe	timeout.exe
PID 1240 wrote to memory of 3644	1240	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe
"C:\Users\Admin\AppData\Local\Temp\a95ac6f63c70b77958a83c6561a975c85c69b068bbc8376144c8f3768ff71455.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:240

C:\Users\Admin\AppData\Local\Temp\kat606F.tmp
C:\Users\Admin\AppData\Local\Temp\kat606F.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4176

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat606F.tmp" & rd /s /q "C:\ProgramData\BKFCAFCFBAEH" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1240

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:3644

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

2

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\kat606F.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/240-0-0x0000000002550000-0x0000000002551000-memory.dmp

Filesize
4KB

Download
memory/240-2-0x0000000004100000-0x0000000004210000-memory.dmp

Filesize
1.1MB

Download
memory/240-10-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download
memory/4176-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4176-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4176-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4176-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4176-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4176-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4176-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4176-17-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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