stealc | 0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8

General

Target

0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe
Size

1.6MB
MD5

f86832c72cdc0e0e5bd7e99f79a0cf7e
SHA1

ab87ce8cc1f8d4d8c2977941e0ac35792d744ecb
SHA256

0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8
SHA512

eaa68d75e1eafa7d25176b168c1073253fe86de5d40d9a02510e65b55f3839096e031c7f7e86ddffeafae755a640dafc47a263cb65410426f337392e44298e07
SSDEEP

24576:spM5863IGfTAVpalBnUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BnUkxVVChjHZQs

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
behavioral1/memory/4760-1-0x00000000029E0000-0x0000000002AF0000-memory.dmp	family_vidar_v7
behavioral1/memory/1508-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1508-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1508-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1508-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1508-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1508-15-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1508-16-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/1508-17-0x0000000000400000-0x0000000000648000-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
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

kat36FE.tmp

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation kat36FE.tmp
Executes dropped EXE 1 IoCs

Processes:

kat36FE.tmp

pid process

1508 kat36FE.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

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation	kat36FE.tmp

pid	process
1508	kat36FE.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe

description	pid	process	target process
PID 4760 set thread context of 1508	4760	0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe	kat36FE.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:

kat36FE.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat36FE.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1364 timeout.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat36FE.tmp

pid process

1508 kat36FE.tmp
1508 kat36FE.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat36FE.tmp

pid	process
1364	timeout.exe

pid	process
1508	kat36FE.tmp
1508	kat36FE.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exekat36FE.tmpcmd.exe

description	pid	process	target process
PID 4760 wrote to memory of 1508	4760	0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe	kat36FE.tmp
PID 4760 wrote to memory of 1508	4760	0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe	kat36FE.tmp
PID 4760 wrote to memory of 1508	4760	0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe	kat36FE.tmp
PID 4760 wrote to memory of 1508	4760	0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe	kat36FE.tmp
PID 4760 wrote to memory of 1508	4760	0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe	kat36FE.tmp
PID 4760 wrote to memory of 1508	4760	0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe	kat36FE.tmp
PID 4760 wrote to memory of 1508	4760	0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe	kat36FE.tmp
PID 4760 wrote to memory of 1508	4760	0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe	kat36FE.tmp
PID 1508 wrote to memory of 4088	1508	kat36FE.tmp	cmd.exe
PID 1508 wrote to memory of 4088	1508	kat36FE.tmp	cmd.exe
PID 1508 wrote to memory of 4088	1508	kat36FE.tmp	cmd.exe
PID 4088 wrote to memory of 1364	4088	cmd.exe	timeout.exe
PID 4088 wrote to memory of 1364	4088	cmd.exe	timeout.exe
PID 4088 wrote to memory of 1364	4088	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe
"C:\Users\Admin\AppData\Local\Temp\0846f88671aff483415d2885528cb30136d179674957b558da8ea29de9c06fe8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4760

C:\Users\Admin\AppData\Local\Temp\kat36FE.tmp
C:\Users\Admin\AppData\Local\Temp\kat36FE.tmp
2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1508

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat36FE.tmp" & rd /s /q "C:\ProgramData\BFCGDAAKFHID" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:4088

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:1364

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

3

T1012

System Information Discovery

3

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\kat36FE.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1508-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1508-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1508-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1508-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1508-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1508-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1508-16-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1508-17-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4760-0-0x00000000021F0000-0x00000000021F1000-memory.dmp

Filesize
4KB

Download
memory/4760-1-0x00000000029E0000-0x0000000002AF0000-memory.dmp

Filesize
1.1MB

Download
memory/4760-10-0x0000000000400000-0x0000000000594000-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