stealc | a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e

General

Target

a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe
Size

2.0MB
MD5

d244227811f2d57f207d6d57b3a6a83f
SHA1

ea2dde0b31cfd7b1f5d7e7ee2f9e975d0ae44510
SHA256

a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e
SHA512

31777bbd5f505e39d1b2668461e9293f1f5a85a7269477deee4dc177a91aa056836be4e0a51b503e290dec6115000f7da8b7920d5541c781bc9c774498424fff
SSDEEP

49152:OePpQEZJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEZtIuoITsdZ

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 14 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/448-2-0x00000000040B0000-0x00000000041F9000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-36-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-52-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-53-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-64-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-65-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-66-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-67-0x0000000000400000-0x0000000000646000-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
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:

kat3038.tmp

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation kat3038.tmp
Executes dropped EXE 1 IoCs

Processes:

kat3038.tmp

pid process

3228 kat3038.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 local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	kat3038.tmp

pid	process
3228	kat3038.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe

description	pid	process	target process
PID 448 set thread context of 3228	448	a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe	kat3038.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:

kat3038.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3038.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4372 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat3038.tmp

pid process

3228 kat3038.tmp
3228 kat3038.tmp
3228 kat3038.tmp
3228 kat3038.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3038.tmp

pid	process
4372	timeout.exe

pid	process
3228	kat3038.tmp
3228	kat3038.tmp
3228	kat3038.tmp
3228	kat3038.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exekat3038.tmpcmd.exe

description	pid	process	target process
PID 448 wrote to memory of 3228	448	a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe	kat3038.tmp
PID 448 wrote to memory of 3228	448	a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe	kat3038.tmp
PID 448 wrote to memory of 3228	448	a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe	kat3038.tmp
PID 448 wrote to memory of 3228	448	a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe	kat3038.tmp
PID 448 wrote to memory of 3228	448	a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe	kat3038.tmp
PID 448 wrote to memory of 3228	448	a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe	kat3038.tmp
PID 448 wrote to memory of 3228	448	a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe	kat3038.tmp
PID 448 wrote to memory of 3228	448	a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe	kat3038.tmp
PID 3228 wrote to memory of 2272	3228	kat3038.tmp	cmd.exe
PID 3228 wrote to memory of 2272	3228	kat3038.tmp	cmd.exe
PID 3228 wrote to memory of 2272	3228	kat3038.tmp	cmd.exe
PID 2272 wrote to memory of 4372	2272	cmd.exe	timeout.exe
PID 2272 wrote to memory of 4372	2272	cmd.exe	timeout.exe
PID 2272 wrote to memory of 4372	2272	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe
"C:\Users\Admin\AppData\Local\Temp\a50d6a4234b19bf730cecdb1c2c4b5476fff2efe0f1637dfc01950e50c074a8e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:448
- C:\Users\Admin\AppData\Local\Temp\kat3038.tmp
  C:\Users\Admin\AppData\Local\Temp\kat3038.tmp
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3228
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat3038.tmp" & rd /s /q "C:\ProgramData\CFHIIEHJKKEC" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2272
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

4

T1552

Credentials In Files

4

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

4

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat3038.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/448-9-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download
memory/448-2-0x00000000040B0000-0x00000000041F9000-memory.dmp

Filesize
1.3MB

Download
memory/448-0-0x0000000002270000-0x0000000002271000-memory.dmp

Filesize
4KB

Download
memory/3228-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-20-0x000000001B770000-0x000000001B9CF000-memory.dmp

Filesize
2.4MB

Download
memory/3228-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-52-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-53-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-64-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-65-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-66-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-67-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads