stealc | fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca

General

Target

fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe
Size

1.6MB
MD5

066b14e2831b04bc417116c04906d85e
SHA1

691112887b99ff58252369439b264bcdb7e0a532
SHA256

fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca
SHA512

e499ac8abd616872fe50d2e9c7185f2dcb08073b33a8e0c6b592503b8295076800e3cdb79d445c3a54ad2862ba1d6bd04aee46a00ca6aec83e97d00074548609
SSDEEP

24576:spM5863IGfTAVpalBFUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BFUkxVVChjHZQs

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 13 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/240-1-0x0000000003FF0000-0x0000000004100000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-7-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-43-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-59-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-60-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-71-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-72-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2080-73-0x0000000000400000-0x0000000000648000-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:

kat6DAE.tmp

pid process

2080 kat6DAE.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
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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
2080	kat6DAE.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe

description	pid	process	target process
PID 240 set thread context of 2080	240	fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe	kat6DAE.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:

kat6DAE.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat6DAE.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3708 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat6DAE.tmp

pid process

2080 kat6DAE.tmp
2080 kat6DAE.tmp
2080 kat6DAE.tmp
2080 kat6DAE.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat6DAE.tmp

pid	process
3708	timeout.exe

pid	process
2080	kat6DAE.tmp
2080	kat6DAE.tmp
2080	kat6DAE.tmp
2080	kat6DAE.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exekat6DAE.tmpcmd.exe

description	pid	process	target process
PID 240 wrote to memory of 2080	240	fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe	kat6DAE.tmp
PID 240 wrote to memory of 2080	240	fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe	kat6DAE.tmp
PID 240 wrote to memory of 2080	240	fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe	kat6DAE.tmp
PID 240 wrote to memory of 2080	240	fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe	kat6DAE.tmp
PID 240 wrote to memory of 2080	240	fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe	kat6DAE.tmp
PID 240 wrote to memory of 2080	240	fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe	kat6DAE.tmp
PID 240 wrote to memory of 2080	240	fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe	kat6DAE.tmp
PID 240 wrote to memory of 2080	240	fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe	kat6DAE.tmp
PID 2080 wrote to memory of 4780	2080	kat6DAE.tmp	cmd.exe
PID 2080 wrote to memory of 4780	2080	kat6DAE.tmp	cmd.exe
PID 2080 wrote to memory of 4780	2080	kat6DAE.tmp	cmd.exe
PID 4780 wrote to memory of 3708	4780	cmd.exe	timeout.exe
PID 4780 wrote to memory of 3708	4780	cmd.exe	timeout.exe
PID 4780 wrote to memory of 3708	4780	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe
"C:\Users\Admin\AppData\Local\Temp\fc48508958191428f0434b92f4aa1f1bc12d2e6e237f81ad5897aa710f0e89ca.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:240

C:\Users\Admin\AppData\Local\Temp\kat6DAE.tmp
C:\Users\Admin\AppData\Local\Temp\kat6DAE.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2080

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat6DAE.tmp" & rd /s /q "C:\ProgramData\HJDBAFIECGHC" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:4780

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:3708

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat6DAE.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

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

Filesize
1.6MB

Download
memory/240-1-0x0000000003FF0000-0x0000000004100000-memory.dmp

Filesize
1.1MB

Download
memory/240-0-0x0000000002300000-0x0000000002301000-memory.dmp

Filesize
4KB

Download
memory/2080-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-7-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-27-0x0000000026090000-0x00000000262EF000-memory.dmp

Filesize
2.4MB

Download
memory/2080-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-43-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-59-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-60-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-71-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-72-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2080-73-0x0000000000400000-0x0000000000648000-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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